Opinion
KATZ, J.
In these consolidated appeals, the plaintiff, the commissioner of the department of transportation (department), challenges the judgments of the judge trial referee (trial court) reassessing condemnation awards to the defendant Towpath Associates (Towpath) and the defendants Joseph F. Wilusz and Carol [531]*531C. Wilusz (Wilusz),1 respectively, in connection with the taking of the defendants’ properties by eminent domain. The department contends that the trial court improperly assessed two stone bridge abutments, awarding damages as just compensation based on the value of the property to the state, rather than assessing their value in the ordinary market. We reverse the judgments of the trial court and remand the cases for a new trial.
The following facts reasonably were found by the trial court. The properties at issue lie on opposite sides of the Nepaug River in the town of Canton. The property line runs from west to east down the center of the river. On each bank there exists an abandoned stone bridge abutment and railroad track bed. The Towpath property is located on the south side of the river; the Wilusz property is on the north side. Although the railroad tracks and the bridge, which once had spanned the river connecting the properties, had been removed, the bridge abutments maintained an estimated useful life of 100 years. Neither property contains any other improvements.
The two parcels are located in a designated flood plain district and are zoned to permit single-family dwellings on one-half acre lots. The trial court recognized that, although the size of the condemned parcels precluded any development under the zoning regulations applicable to the flood plain, a special exception existed concerning the construction of bridges thereon.
On April 9, 1998, the department issued separate notices of condemnation and assessments of damages to Towpath and Wilusz under General Statutes § 13a-[532]*53273 (b).2 Both notices stated that the properties were [533]*533“necessary for the layout, alteration, extension, widening, change of grade and improvement of the highway commonly known as . . . Powder Mill Road.” The department’s taking consisted of 17,160 square feet of land, including the railroad track bed and one of the bridge abutments, on the Towpath side of the river.3 The Wilusz property contained the other bridge abutment and track bed, and amounted to 27,340 square feet.4 The department had planned to utilize the bridge abutments, which were in close proximity to the existing roadway, to realign Powder Mill Road. The bridge on that road had been neglected, and the trial court noted that it was “unsafe for vehicular use, and dangerous for pedestrians. It [had] deteriorated to the extent [that] it [was] impassible. Open holes exist[ed] in its pavement . . . .”
[534]*534The department assessed damages to the Towpath and Wilusz properties in the amount of $1175 and $1575, respectively, and, in accordance with General Statutes § § 13a-73 (b) and 48-11,5 the department deposited those amounts with the clerk of the Superior Court and notified the defendants of the taking. Towpath and Wilusz challenged the assessments by filing further pleadings in the trial court. The cases were referred separately to ajudge trial referee. See General Statutes §§ 13a-76,6 [535]*53548-107 and 52-434 (a) (l);8 Practice Book § 19-3.9
The cases were heard separately, but one immediately followed the other. In both cases, the department moved in limine to exclude evidence concerning the value of the bridge abutments. The trial court denied those motions.
In each case, the trial court heard testimony from the defendants’ real estate appraiser, Peter R. Marsele, [536]*536and from the department’s appraiser, Cynthia L. Bess. In addition, the defendants in both cases provided testimony from a structural engineer, James A. Thompson, concerning the replacement cost of the abutments. Thompson estimated the cost of constructing new bridge abutments on the taken property that would accommodate a bridge like the one proposed by the department.
Marsele compared the value of the Towpath property as a six acre parcel prior to the taking with its postcon-demnation value, notwithstanding the fact that Towpath owned only that portion of the property that the department had condemned. See footnote 3 of this opinion. Marsele testified that, in his opinion, the highest and best use of the property was that proposed by the state, to bridge the river, or a similar use connecting the bridge abutments. Although he could not conduct a comparable sales analysis of similar properties with bridge abutments thereon, Marsele compared vacant flood land values and estimated the value of the Towpath property, without the abutment, to be $7200 for the six acre plot. Relying on the report of the structural engineer, Marsele then estimated that the replacement cost of the bridge abutment amounted to $91,300. Thus, in Marsele’s opinion, the estimated total property value of the six acres prior to condemnation was $98,500.
Because the Towpath property actually taken by the department was only 17,160 square feet, Marsele estimated the land remaining after the taking to be 5.6061 acres. Applying the same estimates for vacant flood property values to the remaining land resulted in an estimated value of $6700. Marsele obtained his total damage estimate to Towpath as a result of the taking by comparing the before taking estimated value of $98,500 with the estimated value of the land remaining without the abutment of $6700. In essence, Marsele took his estimated value of the six acre property of $98,500 and [537]*537from that deducted $6700, the estimated value of the 5.6 acres not taken by the department, resulting in an estimated loss to Towpath of $91,800.
Marsele offered similar estimates in the Wilusz case. He testified that the highest and best use of the property was the same as that of the Towpath property, that is, its use as a bridge site connecting the abutments. Marsele estimated that, prior to the taking, the 2.058 acre parcel of vacant land, without the abutment, had been worth $2500. In addition, he estimated the replacement cost of the abutment to be $91,300, for a total precondemnation value of $93,800. The Wilusz property taken was 27,340 square feet, which, according to Marsele, left an estimated land area of 1.43 acres. Marsele estimated the remaining value of that 1.43 acres to be $1700. Subtracting that from the estimated value of the 2.058 acres and the bridge abutment prior to the taking led Marsele to conclude that Wilusz suffered damages in the amount of $92,100.
Bess, the department’s appraiser, testified as well, although in the trial court’s view, her analysis regarding the two properties “lacked comprehension” principally because the bridge abutments “were of no consequence in her findings of damage.” In Bess’ opinion, the zoning restrictions concerning the flood plain property precluded any development and, because the land was vacant, the highest and best use of each of the properties was its “continued present use as vacant/flood zone land.”
Bess used a comparable sales analysis to estimate the value of the land and determined that the Towpath property before the taking was 0.51 acres, valued at $1350. After the taking, Bess estimated that 0.12 acres remained and that its approximate value was $360. She concluded that Towpath suffered damages in the amount of approximately $1175.
[538]*538Similarly, with respect to the Wilusz property, Bess determined that, before the taking, an 8.03 acre plot was worth $20,075. After the taking of 0.63 acres, she estimated the remaining value of 7.4 acres to be $18,500. Thus, Bess estimated that the total damages suffered by Wilusz amounted to $1575.
Following the separate hearings, the trial court issued a joint memorandum of decision. The trial court found that “the highest and best use of the subject properties is their use in the manner proposed by the takings for the relocation and realignment of Powder Mill Road and the replacement of its unsafe and abandoned bridge, or a similar use bridging the Nepaug River, utilizing the existing abutments on its banks, and building a roadway for transportation or recreational purposes over and incorporating the abandoned railroad track bed existing on the properties.” The trial court further found that the properties maintained “special adaptability” for such a use. After considering the fact that the abutments constituted “structures that have become a part of the real estate” and that the value of the property must be considered as a whole, “rather than being valued separately in a summation approach,” the trial court assessed further damages to Towpath in the amount of $21,125 for a total condemnation award of $22,300. Similarly, the trial court assessed additional damages to Wilusz in the amount of $22,525, for a total condemnation award of $24,100.
Thereafter, the department filed separate appeals in each case in the Appellate Court. Towpath and Wilusz filed cross appeals, and the Appellate Court, sua sponte, consolidated the cases. Both Towpath and Wilusz withdrew their cross appeals and we subsequently transferred the consolidated appeals to this court pursuant to Practice Book § 65-1 and General Statutes § 51-199 (c).
On appeal, the department maintains that the trial court improperly valued the bridge abutments and [539]*539failed to apply the general rale for valuing property enunciated in Gray Line Bus Co. v. Greater Bridgeport Transit District, 188 Conn. 417, 427, 449 A.2d 1036 (1982) (“[t]he general rale is that the loss to the owner from the taking, and not its value to the condemnor, is the measure of the damages to be awarded in eminent domain proceedings”). The department contends that the trial court gauged the value of the taken property from the condemnor’s perspective, and awarded damages to the defendants based on the department’s savings in relocating Powder Mill Road and in avoiding the costs of building similar structures to support a bridge spanning the river. The department argues that, in accordance with Gray Line Bus Co. v. Greater Bridgeport Transit District, supra, 427, in affixing a value to the property, the trial court should have considered the loss to the owners, and the value of the abutments in the ordinary market. The department contends that, from that perspective, the abutments were worthless. The department also maintains that the trial court improperly found that, because of the presence of the abutments, the properties were specially adapted to their use as a bridge site. The department claims that, because the land was held by separate owners and because anyone wanting to build a bridge would have had to connect the parcels, the trial court engaged in improper speculation in awarding compensation for their special adaptability as a bridge site.
Before we consider these arguments, we note that “[t]he scope of our appellate review depends upon the proper characterization of the rulings made by the trial court. To the extent that the trial court has made findings of fact, our review is limited to deciding whether such findings are clearly erroneous. When, however, the trial court draws conclusions of law, our review is plenary and we must decide whether its conclusions are legally and logically correct and find support in the [540]*540facts that appear in the record. . . . Torres v. Waterbury, 249 Conn. 110, 118-19, 733 A.2d 817 (1999).” (Internal quotation marks omitted.) Olson v. Accessory Controls & Equipment Corp., 254 Conn. 145, 156, 757 A.2d 14 (2000).
Article first, § 11, of the Connecticut constitution provides that “[t]he property of no person shall be taken for public use, without just compensation therefor.” This court has stated consistently that “[t]he question of what is just compensation is an equitable one rather than a strictly legal or technical one. The paramount law intends that the condemnee shall be put in as good condition pecuniarily by just compensation as he [or she] would have been in had the property not been taken. Colaluca v. Ives, [150 Conn. 521, 530, 191 A.2d 340 (1963)].” (Internal quotation marks omitted.) Alem-any v. Commissioner of Transportation, 215 Conn. 437, 444, 576 A.2d 503 (1990).
“The amount that constitutes just compensation is the market value of the condemned property when put to its highest and best use at the time of the taking. . . . The fair market value is the price that a willing buyer would pay a willing seller based on the highest and best possible use of the land assuming, of course that a market exists for such optimum use.” (Citations omitted; internal quotation marks omitted.) Robinson v. Westport, 222 Conn. 402, 405, 610 A.2d 611 (1992). The highest and best use of a given parcel contemplates “the use which will most likely produce the highest market value, greatest financial return, or the most profit . . . .” (Internal quotation marks omitted.) Id. “In determining its highest and best use the trial referee must consider whether there was a reasonable probability that in the reasonably near future the subject property” would be put to that use, and the effect, if any, that such a prospective use may have on market value at the time of the taking. (Internal quotation marks [541]*541omitted.) Id., 406; see also Greene v. Burns, 221 Conn. 736, 748, 607 A.2d 402 (1992) (questions of highest and best use and reasonable probability of future changes affecting value are factual determinations for trier).10
In an eminent domain proceeding, “a trial court may seek aid in the testimony of experts, but must ultimately make its own independent determination of fair compensation ... on the basis of all the circumstances bearing upon value.” (Citation omitted; internal quotation marks omitted.) French v. Clinton, 215 Conn. 197, 202-203, 575 A.2d 686 (1990). Our cases have “reaffirmed the principle that, because each parcel of real property is in some ways unique, trial courts must be afforded substantial discretion in choosing the most appropriate method of determining the value of a taken property. D’Addario v. Commissioner of Transportation, 180 Conn. 355, 365, 429 A.2d 890 (1980); Slavitt [542]*542v. Ives, 163 Conn. 198, 209, 303 A.2d 13 (1972); Moss v. New Haven Redevelopment Agency, 146 Conn. 421, 425-26, 151 A.2d 693 (1959).” French v. Clinton, supra, 200-201. “When the land and buildings taken have a market value, that must serve as the measure of damages; if there be no market value, [their] value . . . must be ascertained in some other rational way . . . from such elements as are attainable.” (Internal quotation marks omitted.) Campbell v. New Haven, 101 Conn. 173, 181, 125 A. 650 (1924); see also Alemany v. Commissioner of Transportation, supra, 215 Conn. 444 (noting that, although market value is ordinarily appropriate measure of fair compensation, “other measures may be appropriate when the fair market value measure of damages does not fully compensate the owner”); Gebrian v. Bristol Redevelopment Agency, 171 Conn. 565, 576, 370 A.2d 1055 (1976) (“[property which has no market value may be valued, for condemnation purposes, by some other method”); Meriden v. Highway Commissioner, 169 Conn. 655, 657, 363 A.2d 1094 (1975) (noting that property that is seldom exchanged lacks ready market value and recourse must be had to other methods of valuation).11
Finally, we note that the condemnor is not required to pay the landowner for elements of value that may arise solely by virtue of the condemnation. See United States v. Fuller, 409 U.S. 488, 492, 93 S. Ct. 801, 35 L. Ed. 2d 16 (1973) (noting that condemnor not required to pay for value that it created); 4 P. Nichols, Eminent Domain (3d Ed. Rev. 2000, J. Sackman & B. Van Brunt eds.) § 12B.17[1], p. 12B-202. Mindful of this general [543]*543framework, we address the arguments in these consolidated appeals.
I
The dispositive issue in this case is the department’s claim that the trial court improperly concluded that the properties maintained special adaptability for their highest and best use as a bridge site. Although it does not directly challenge the trial court’s finding with respect to the properties’ highest and best use, the department argues that the trial court engaged in speculation when it determined that the two parcels together would be adaptable for the construction of a bridge. Quoting a leading treatise on eminent domain; see 3 P. Nichols, supra, § 8.07, p. 8-109; the department contends that when special adaptability creates a demand for the property by ordinary users in the market, it may be considered as an element of market value, but if that adaptability “ ‘depends upon the particular parcel being assembled with other parcels so as to make ... it useful for the intended purpose, then the effect of such contrived or artificially created adaptability is considered too remote and speculative . . .
The defendants point out that the trial court heard testimony from Marsele that it was foreseeable that an entity other than the state would assemble these parcels to erect a bridge thereon. The defendants contend that, because the abutments had been connected in the past and the department had plans to construct a bridge, the trial court properly determined that the properties were specially adaptable for their highest and best use as a bridge site. We agree with the department that, based on the evidence in the record, the trial court’s conclusions regarding the special adaptability of the propeity for its highest and best use were speculative.
[544]*544A
In prior cases addressing the value of condemned property based on prospective uses of that property, this court has recognized that “[t]he use to which land can be put with reasonable probability is part of the standard scenario of hypothetical negotiations between a willing buyer and seller.” Transportation Plaza Associates v. Powers, 203 Conn. 364, 376, 525 A.2d 68 (1987); id., 375-76 (“fair market value of realty is determined in light of the use to which it is being put at the time of the taking or to which it could be put most advantageously” [emphasis in original]). “Evidence of the special adaptability of land for a particular purpose is properly admitted if there is a reasonable probability that the land could be so used within a reasonable time and with economic feasibility.” Id., 375; see also Connecticut Printers, Inc. v. Redevelopment Agency, 159 Conn. 407, 412, 270 A.2d 549 (1970) (“[i]n order for the value of the plaintiffs premises to be increased by the unusual [adaptability], there must have been a showing not only that the premises were physically or specially adaptable for the particular use upon which the plaintiff solely relied . . . but also that there was a reasonable probability that they would be so used within a reasonable time; otherwise the special use would be too remote and speculative to have any legitimate effect upon the valuation”). A landowner “must provide the trier with sufficient evidence from which it could conclude that it is reasonably probable that the land to be taken would, but for the taking, be devoted to the proposed use by a prudent investor in the near future. . . . The uses to be considered must be so reasonably probable as to have an effect on the present market value of the land. Purely imaginative or speculative value should not be considered. Tandet v. Urban Redevelopment Commission, 179 Conn. 293, 299-300, [545]*545426 A.2d 280 (1979).” (Internal quotation marks omitted.) Robinson v. Westport, supra, 222 Conn. 409.
The trial court in these cases heard testimony from the defendants’ appraiser and engineer that each abutment, independent of the other property, maintained structural integrity such that it could accommodate a bridge project without any other fortification. Thus, there was evidence that it was economically feasible to incorporate a single abutment, regardless of an acquisition of the other abutment, into a potential construction project for the highest and best use of the property.12 The trial court concluded that “[t]he special adaptability of the land for the purpose of the taking may be considered by the court, as an informed prospective buyer would take such element into consideration in fixing the price he [or she] would be willing to pay for the land.” The trial court heard virtually no evidence, however, concerning the prospect that anyone other than the department would have acquired one of these properties separately to pursue such a [546]*546project in the reasonably near future. See United States v. Fuller, supra, 409 U.S. 492; see also United States ex rel. T.V.A. v. Powelson, 319 U.S. 266, 276, 63 S. Ct. 1047, 87 L. Ed. 1390 (1943) (in estimating probability that lands may be put to use for which they may be adapted, just compensation under fifth amendment to federal constitution requires that “the power of effecting [such a change] by eminent domain must be left out” [internal quotation marks omitted]); McGovern v. New York, 229 U.S. 363, 372, 33 S. Ct. 876, 57 L. Ed. 1228 (1913) (same); Greystone Heights Redevelopment Corp. v. Nicholas Investment Co., 500 S.W.2d 292, 297 (Mo. App. 1973) (“utility or availability of the property for the special purpose of the taker cannot be shown, if the taker is the only party who can use the property for that purpose”).
The only testimony regarding the likelihood that someone other than the department would have acquired either one of the properties in the near future to erect a bridge thereon was that of Marsele who simply asserted that, with respect to the highest and best use of the properties, “various agencies” might utilize the abutments. Marsele testified that “[t]his piece could easily be spanned for connecting this abutment to another abutment on the other side of the Nepaug River to create either a bike path and/or a walking path to facilitate recreation. That usually is done by either a town or some of these private organizations that are interested in nature .... As a matter of fact, in Canton they’re working on a portion of a nature trail right now, not in this area at the moment, but they’re working on one.” In the absence of evidence to support a finding that there was a reasonable probability that the property would have been used for a bridge site within a reasonable time had the taking not occurred, the trial court’s determination that the properties herein were specially adaptable for the highest and best use was nothing more than speculation. Minicucci v. Commissioner of [547]*547Transportation, 211 Conn. 382, 385, 559 A.2d 216 (1989) (in determining adaptability for highest and best use as subdivision, trial referee must consider reasonable probability that in reasonably near- future subject property will be subdivided); Transportation Plaza Associates v. Powers, supra, 203 Conn. 377 (trial court had sufficient evidence to establish reasonable probability that land, but for condemnation, would have been put to proposed use by prudent investor in near future; landowner’s architectural plans for office building properly considered). We therefore conclude that the trial court’s highest and best use finding, that is, that the highest and best use for each separate parcel would be a use incorporating a single abutment into a potential bridge project, is undermined by the speculative nature of the finding regarding the properties’ individual adaptability therefor. See Connecticut Printers, Inc. v. Redevelopment Agency, supra, 159 Conn. 414 (“[a] structure or improvement may add little or nothing to the value unless it is of such a character that it is adapted to some prospective use which affects the market value of the land” [internal quotation marks omitted]).
B
On a more fundamental level, in considering each property separately as specially adaptable for its highest and best use as a bridge site because of the presence of a single abutment, the trial court’s conclusion necessarily implies, although an express finding in this regard is lacking in its decision, that it was a reasonable probability that the properties would be connected for such a use in the reasonably near future. Such a finding is implicit in the trial court’s conclusion that the properties were specially adaptable for their highest and best use. Greene v. Burns, supra, 221 Conn. 745 (concluding that trial court implicitly found that zone change affecting fair market value reasonably probable). Although the trial court heard evidence in these cases separately, [548]*548the bulk of which was substantially similar, its conclusions assume that it would have been reasonably probable, beyond a mere possibility, that, had the taking not occurred, the owners or a third party would have assembled these parcels to build a bridge. We conclude that the record fails to provide an adequate foundation to support a finding that it was anything other than “imaginative or speculative” that another entity would have acquired these two parcels in the near future to pursue a bridge project. Robinson v. Westport, supra, 222 Conn. 409.
We heretofore have not addressed the question of whether, in a condemnation proceeding, an award may be made based on a parcel’s highest and best use when that use requires an assemblage of separate lands. We recognize, however, “[t]he fact that the most profitable use of a parcel can be made only in combination with other lands does not necessarily exclude that use from consideration if the possibility of combination is reasonably sufficient to affect market value. . . . There must be a reasonable [probability] that the owner could use this tract together with the other [parcels for such] purposes or that another could acquire all lands or easements necessary for that use.” Olson v. United States, 292 U.S. 246, 256-57, 54 S. Ct. 704, 78 L. Ed. 1236 (1934); see also United States v. Fuller, supra, 409 U.S. 490 (“highest and best use of a parcel may be found to be a use in conjunction with other parcels, and . . . any increment of value resulting from such combination may be taken into consideration in valuing the parcel taken”); Clarmar Realty Co. v. Redevelopment Authority, 129 Wis. 2d 81, 87, 383 N.W.2d 890 (1986) (“[t]he assemblage approach permits a property owner to introduce evidence in a condemnation proceeding that the [549]*549fair market value of its land is enhanced by its probable assemblage with other parcels”).13
“[I]f a prospective, integrated use is the ‘highest and best use’ of the land, can be achieved only through combination with other parcels of land, and combination of the parcels is ‘reasonably probable,’ ” then evidence concerning assemblage, and, ultimately, a finding that the land is specially adaptable for that highest and best use, may be appropriate. Clarmar Realty Co. v. Redevelopment Authority, supra, 129 Wis. 2d 88. The consideration of a future change in the use of the parcel taken and the effect that such a change may have on the market value at the time of the taking has long been recognized in Connecticut, and the use of property in conjunction with other parcels may affect value if it is shown that such an integrated use reasonably would [550]*550have occurred in the absence of the condemnation. See, e.g., Budney v. Ives, 156 Conn. 83, 89-90, 239 A.2d 482 (1968) (reasonable probability of zone change may affect value of land at time of taking); Housing Authority v. Lustig, 139 Conn. 73, 76, 90 A.2d 169 (1952) (proper to consider all elements that owner or prospective purchaser could reasonably urge as fair price of land considering use to which land could be put most advantageously).
A finding that the property is adaptable for its highest and best use is not warranted if the parcels’ adaptability depends upon speculative or remote possibilities that the lands may be assembled for that use. Robinson v. Westport, supra, 222 Conn. 409; see also United States ex rel. T.V.A. v. Powelson, supra, 319 U.S. 275-76 (recognizing that in order for “special adaptability to be considered, there must be a reasonable probability of the lands in question being combined with other tracts for [the] purpose in the reasonably near future. ... In the absence of such a showing, the chance of their being united for that special use is regarded as ‘too remote and speculative to have any legitimate effect upon the valuation.’ ”); McGovern v. New York, supra, 229 U.S. 372 (landowner “entitled to be paid only for what was taken from him as the titles stood, and could not add to the value by the hypothetical possibility of a change unless that possibility was considerable enough to be a practical consideration and actually influence prices”).
The trial court in these cases concluded, without any discussion of the reasonable likelihood that the parcels would have been connected had the taking not occurred, that the properties maintained special adaptability for their highest and best use as a bridge site, notwithstanding the fact that title had been held by separate owners prior to the taking. The only plans for utilizing the abutments were those of the department, [551]*551and the defendants’ appraiser and engineering expert relied on those plans in estimating the value of the properties. Indeed, the trial court quoted from the department’s construction plans in its decision. No evidence concerning any other proposed use of this property was presented, aside from Marsele’s testimony that the town or “some of these private organizations that are interested in nature” might conceivably decide to build a bridge in the same location. “[Although the possibility of a change . . . always exists in some degree, it [is often] difficult to prove that such a possibility has become a reasonable probability.” Budney v. Ives, supra, 156 Conn. 89-90 (“abundant evidence” presented to support finding of reasonable probability of zone change affecting market value where testimony and town’s master plan reflected that such change was imminent). “Because of the uncertainties necessarily attending the determination of the probability of the happening of such an event in the future, claims and evidence regarding the probability must be scrutinized with care and examined with caution.” Id., 90.
“Where in the opinion of the appraiser the property is not, on the date of the taking, being put to its highest and best use, it is incumbent upon the appraiser to provide the trier with sufficient evidence from which it could conclude that it is reasonably probable that the land to be taken would, but for the taking, be devoted to the proposed use by a prudent investor in the near future.” Tandet v. Urban Redevelopment Commission, supra, 179 Conn. 299. From the record before us in these cases, we cannot conclude that the trial court properly determined that it was reasonably probable that someone other than the department would have assembled these properties in the near future to construct a bridge thereon. The trial court in this case failed to address the reasonable probability that, but for the taking of the defendants’ properties, a prudent investor [552]*552would have obtained, in the reasonably near future, both parcels in order to pursue a bridge project. Id.; see also Arkansas State Highway Commission v. Witkowski, 257 Ark. 659, 663, 519 S.W.2d 743 (1975) (assemblage may be element bearing on market value but, like all elements bearing on value, there must be reasonable basis for damage award); Tigar v. Mystic River Bridge Authority, 329 Mass. 514, 517, 109 N.E.2d 148 (1952) (uses to which property is reasonably adapted may be considered as bearing on value if “necessity for such use is so imminent as to add something to its present value in the minds of buyers”); Monmouth v. Hilton, 334 N.J. Super. 582, 590, 760 A.2d 786 (App. Div. 2000) (“a proposed future assemblage of parcels in different ownership cannot be the basis for application of a highest and best use analysis as of the date of taking because as of that date the parcels have not yet been assembled into the integrated unit required to support that use”; case remanded for new trial in absence of evidence of reasonable probability of assemblage affecting market value).
In addition, we note that, although not a conclusive factor, it is undisputed that neither Towpath nor Wilusz had utilized the properties as proposed for their highest and best use; nor did they submit any plans that they, or anyone else, had for using the properties in such a way had the department not condemned the properties for its highway project. See Transportation Plaza Associates v. Powers, supra, 203 Conn. 375-76. We cannot conclude that the evidence in the record before us is sufficient to support a finding that it was both reasonably probable that someone other than the department would have assembled these properties in the reasonably near future and similarly probable that they would have built, likewise in the foreseeable future, a bridge connecting the properties. Thus, we agree with the department that the trial court’s findings with respect [553]*553to the special adaptability of the properties for a bridge project, based on the evidence presented, were “remote and speculative” possibilities, rather than reasonable probabilities. United States ex rel. T. V.A. v. Powelson, supra, 319 U.S. 276; Robinson v. Westport, supra, 222 Conn. 409; Minicucci v. Commissioner of Transportation, supra, 211 Conn. 387.
Even if we applied the doctrine of assemblage in accordance with cases from jurisdictions that permit an enhanced value for the taken property when considering its integrated use with other property regardless of unity of ownership thereof, the trial court’s decision does not delineate for which aspects of value the increased assessments were awarded. Indeed, because putting the properties to their highest and best use would have required their integration, as of necessity, the trial court’s decision assumes that such an integration was reasonably probable, exclusive of the fact that the department had condemned both parcels. See, e.g., New York v. Sage, 239 U.S. 57, 61, 36 S. Ct. 25, 60 L. Ed. 143 (1915) (under fifth amendment to federal constitution, condemnor “is not to be made to pay for any part of what it has added to the land by thus uniting it with other lots, if that union would not have been practicable or have been attempted except by the intervention of eminent domain”); see also Kessler v. State, 21 App. Div. 2d 568, 570, 251 N.Y.S.2d 487 (1964) (noting that, absent unity of ownership, “treating separately owned parcels of land as a single tract might result in a windfall of sorts to the party who has interest in one parcel but not in the other”).
As we have noted, the trial court necessarily concluded, as a factual matter, that it was reasonably probable that someone other than the condemnor would have obtained, in the foreseeable future, title to these separate properties and then would have constructed a bridge thereon. See Greene v. Burns, supra, 221 Conn. [554]*554748 (question of reasonable probability of zone change question of fact for trier). We conclude that these findings do not find support from the evidence in the record. “ ‘[W]ishful thinking, optimistic conjecture, speculation, rumor and unfounded prognostications do not furnish a proper basis for a finding that a litigant has proved the reasonable probability of a future [event].’ ” Id., 749, quoting Budney v. Ives, supra, 156 Conn. 89-90; see also Greystone Heights Redevelopment Corp. v. Nicholas Investment Co., supra, 500 S.W.2d 298 (record contained “not one shred of evidence” to indicate that, absent condemnation, any third party bidder ever existed or was likely to appear in reasonably near future; landowners entitled to present such evidence in new trial). Therefore, we conclude that the trial court’s finding with respect to the properties’ highest and best use, whether separately or, as necessarily found, in tandem, does not find adequate support in this record. Because the evidence in the record before us does not adequately support a reasonable probability that, but for the taking, the properties would have been assembled and devoted to their purported highest and best use as a bridge site, a new trial is required.14
II
There has never been anything other than mere speculation in the present cases that, in the absence of assemblage by the condemnor, there is or could be a reasonable probability that the defendants’ properties [555]*555would be devoted to a highest and best use as a bridge site. On the basis of the record before us, the only entity likely to assemble the two properties is the present plaintiff, the department. To compensate the defendants on the basis of that supposition, however, would be to do precisely what condemnation law condemns: valuing the property to the condemnor, not the loss to the condemnee.
Because, however, the trial court has yet to value the properties under appropriate standards, a new trial is necessary. In this connection, we leave open for the new trial court to consider as an initial proposition, and without deciding its propriety, whether the defendants are entitled to some compensation for the abutments under the possible exception to the general rule to which we referred in dictum in Gray Line Bus Co. v. Greater Bridgeport Transit District, supra, 188 Conn. 427-28 (“[w]e would approve a deviation from [the general rule] ... in a situation where its application produced an unfair result”).
The judgments are reversed and the cases are remanded for a new trial.
In this opinion BORDEN and PALMER, Js., concurred.