OPINION
NIX, Justice.
This is an appeal from an order of the Commonwealth Court, Surrick v. Zoning Hearing Bd. of Twp. of Upper Providence, 11 Pa.Cmwlth. 607, 314 A.2d 565 (1974), affirming an order of the Court of Common Pleas of Delaware County which upheld the denial of appellant, Robert B. Surrick’s, application for variance from the terms of the Zoning Ordinance of Upper Providence Township, Ordinance No. 34 of 1952, as amended, by the Zoning Hearing Board (Board) of Upper Providence Township.1 The dispositive issue is whether the township ordinance unconstitutionally excludes multi-family dwellings. The Commonwealth [186]*186Court, in affirming the lower court’s order, held that it did not. For the reasons set forth below, we disagree.2
The history and facts of this case are as follows. Appellant sought to build apartments and townhouses on a 16.25 acre tract of land (four acres owned by appellant; 12.25 acres under agreement of sale with zoning contingency). The tract is located in an area designated A-l Residential under the township ordinance, which permits only single family dwellings on one-acre lots. Appellant initially had applied to the Board of Supervisors of the Township to rezone the 12.25 acre tract to B-Business, the only ordinance classification permitting multi-family housing, to develop the site for apartments. The requested rezoning was denied after hearing held on September 2,1971. Thereafter, appellant revised his plans to include the four acres of ground owned by him. He sought building permits, which were denied by the Building Inspector. An appeal was then taken to the Board requesting a variance and including a challenge to the constitutionality of the ordinance. The Board held hearings and subsequently denied the requested variance. It was this denial which ultimately resulted in the instant appeal.3
Upper Providence Township is a western suburb of Philadelphia, located about 12 miles from the center of the city. [187]*187Providence Road bisects the township along a roughly north-south axis, and Route 1, a limited access highway, intersects Providence Road cutting across the southern quarter of the township in a generally east-west direction (see Appendix for a map of the township). The 1970 census set the township’s population at slightly over 9,200; the total acreage of the township is approximately 3,800 acres. Approximately one-quarter of the township land is undeveloped.
The zoning ordinance in question has classified 43 acres, or 1.14% of the total township acreage, as a B district; in this B district apartments are permitted along with other essentially commercial uses,4 and the record shows that the B district is already substantially developed. Except for a three-block stretch of B district farther south in the township, most of the B district extends eight to ten blocks from [188]*188the intersection of Sandy Bank Road and Providence Road north along Providence Road and ends at the intersection of Rose Tree Road and Providence Road. Appellant’s tract is just north of this intersection. The width of this portion of the B district is 175 feet on either side of Providence Road (see Appendix).
Article I Section 1 of the Pennsylvania Constitution protects the citizen’s right to the enjoyment of private property, and governmental interference with this right is circumscribed by the due process provisions of the Fifth and Fourteenth Amendments to the United States Constitution. U.S.Const. amends. V, XIV; Pa.Const. art. 1, § 1; Girsh Appeal, 437 Pa. 237, 241 n. 3, 263 A.2d 395, 397 n. 3 (1970). In reviewing zoning ordinances, this Court has stated that an ordinance must bear a substantial relationship to the health, safety, morals, or general welfare of the community. National Land and Investment Co. v. Easttown Twp. Bd. of Adjustment, 419 Pa. 504, 522, 215 A.2d 597, 607 (1965), citing, inter alia, Glorioso Appeal, 413 Pa. 194, 196 A.2d 668 (1964). Thus, without expressly labelling it as such, this Court has employed a substantive due process analysis in reviewing zoning schemes and has concluded implicitly that exclusionary or unduly restrictive zoning techniques do not have the requisite substantial relationship to the public welfare. See Concord Twp. Appeal, 439 Pa. 466, 268 A.2d 765 (1970); Girsh Appeal, supra.
In Twp. of Willistown v. Chesterdale Farms, Inc., 462 Pa. 445, 341 A.2d 466 (1975), this Court reaffirmed its conviction that suburban communities which find themselves in the path of urban-suburban growth cannot establish residential enclaves by excluding population growth.5 Willistown in fact was no departure from precedent but merely a culmination of prior case law which had invalidated zoning techniques which seriously impeded or effectively “zoned out” population growth. See National Land and Investment Co. v. Easttown Twp. Bd. of Adjustment, supra (invalidating a [189]*189four acre lot minimum); Girsh Appeal, supra (invalidating a zoning ordinance which totally excluded apartments); Concord Twp. Appeal, supra (invalidating two and three acre lot minima).6 In Willistown, this Court was confronted with a zoning ordinance amendment which permitted multi-family dwellings on 80 acres out of a total of 11,589 acres in the township. In striking down this land-use scheme as “tokenism” and thus exclusionary, we extended the prohibition in Girsh to include not only total exclusion of multi-family dwellings but also partial exclusion, or “selective admission.” Twp. of Willistown v. Chesterdale Farms, Inc., 462 Pa. 445, 448-49, 341 A.2d 466, 468 (1975). In so holding, we set forth the following rationale:
“The implication of our decision in National Land is that communities must deal with the problems of population growth. They may not refuse to confront the future by adopting zoning regulations that effectively restrict population to near present levels . . . .” Id. 462 Pa. at 449, 341 A.2d at 468, quoting, Concord Twp. Appeal, 439 Pa. 466, 474, 268 A.2d 765, 768-69 (1970).
This Court’s ruling in Willistown rested upon the premise of Girsh that where a municipal subdivision “is a logical place for development to take place, it should not be heard to say that it will not bear its rightful part of the burden.” Appeal of Girsh, supra, 437 Pa. at 245, 263 A.2d at 399.
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OPINION
NIX, Justice.
This is an appeal from an order of the Commonwealth Court, Surrick v. Zoning Hearing Bd. of Twp. of Upper Providence, 11 Pa.Cmwlth. 607, 314 A.2d 565 (1974), affirming an order of the Court of Common Pleas of Delaware County which upheld the denial of appellant, Robert B. Surrick’s, application for variance from the terms of the Zoning Ordinance of Upper Providence Township, Ordinance No. 34 of 1952, as amended, by the Zoning Hearing Board (Board) of Upper Providence Township.1 The dispositive issue is whether the township ordinance unconstitutionally excludes multi-family dwellings. The Commonwealth [186]*186Court, in affirming the lower court’s order, held that it did not. For the reasons set forth below, we disagree.2
The history and facts of this case are as follows. Appellant sought to build apartments and townhouses on a 16.25 acre tract of land (four acres owned by appellant; 12.25 acres under agreement of sale with zoning contingency). The tract is located in an area designated A-l Residential under the township ordinance, which permits only single family dwellings on one-acre lots. Appellant initially had applied to the Board of Supervisors of the Township to rezone the 12.25 acre tract to B-Business, the only ordinance classification permitting multi-family housing, to develop the site for apartments. The requested rezoning was denied after hearing held on September 2,1971. Thereafter, appellant revised his plans to include the four acres of ground owned by him. He sought building permits, which were denied by the Building Inspector. An appeal was then taken to the Board requesting a variance and including a challenge to the constitutionality of the ordinance. The Board held hearings and subsequently denied the requested variance. It was this denial which ultimately resulted in the instant appeal.3
Upper Providence Township is a western suburb of Philadelphia, located about 12 miles from the center of the city. [187]*187Providence Road bisects the township along a roughly north-south axis, and Route 1, a limited access highway, intersects Providence Road cutting across the southern quarter of the township in a generally east-west direction (see Appendix for a map of the township). The 1970 census set the township’s population at slightly over 9,200; the total acreage of the township is approximately 3,800 acres. Approximately one-quarter of the township land is undeveloped.
The zoning ordinance in question has classified 43 acres, or 1.14% of the total township acreage, as a B district; in this B district apartments are permitted along with other essentially commercial uses,4 and the record shows that the B district is already substantially developed. Except for a three-block stretch of B district farther south in the township, most of the B district extends eight to ten blocks from [188]*188the intersection of Sandy Bank Road and Providence Road north along Providence Road and ends at the intersection of Rose Tree Road and Providence Road. Appellant’s tract is just north of this intersection. The width of this portion of the B district is 175 feet on either side of Providence Road (see Appendix).
Article I Section 1 of the Pennsylvania Constitution protects the citizen’s right to the enjoyment of private property, and governmental interference with this right is circumscribed by the due process provisions of the Fifth and Fourteenth Amendments to the United States Constitution. U.S.Const. amends. V, XIV; Pa.Const. art. 1, § 1; Girsh Appeal, 437 Pa. 237, 241 n. 3, 263 A.2d 395, 397 n. 3 (1970). In reviewing zoning ordinances, this Court has stated that an ordinance must bear a substantial relationship to the health, safety, morals, or general welfare of the community. National Land and Investment Co. v. Easttown Twp. Bd. of Adjustment, 419 Pa. 504, 522, 215 A.2d 597, 607 (1965), citing, inter alia, Glorioso Appeal, 413 Pa. 194, 196 A.2d 668 (1964). Thus, without expressly labelling it as such, this Court has employed a substantive due process analysis in reviewing zoning schemes and has concluded implicitly that exclusionary or unduly restrictive zoning techniques do not have the requisite substantial relationship to the public welfare. See Concord Twp. Appeal, 439 Pa. 466, 268 A.2d 765 (1970); Girsh Appeal, supra.
In Twp. of Willistown v. Chesterdale Farms, Inc., 462 Pa. 445, 341 A.2d 466 (1975), this Court reaffirmed its conviction that suburban communities which find themselves in the path of urban-suburban growth cannot establish residential enclaves by excluding population growth.5 Willistown in fact was no departure from precedent but merely a culmination of prior case law which had invalidated zoning techniques which seriously impeded or effectively “zoned out” population growth. See National Land and Investment Co. v. Easttown Twp. Bd. of Adjustment, supra (invalidating a [189]*189four acre lot minimum); Girsh Appeal, supra (invalidating a zoning ordinance which totally excluded apartments); Concord Twp. Appeal, supra (invalidating two and three acre lot minima).6 In Willistown, this Court was confronted with a zoning ordinance amendment which permitted multi-family dwellings on 80 acres out of a total of 11,589 acres in the township. In striking down this land-use scheme as “tokenism” and thus exclusionary, we extended the prohibition in Girsh to include not only total exclusion of multi-family dwellings but also partial exclusion, or “selective admission.” Twp. of Willistown v. Chesterdale Farms, Inc., 462 Pa. 445, 448-49, 341 A.2d 466, 468 (1975). In so holding, we set forth the following rationale:
“The implication of our decision in National Land is that communities must deal with the problems of population growth. They may not refuse to confront the future by adopting zoning regulations that effectively restrict population to near present levels . . . .” Id. 462 Pa. at 449, 341 A.2d at 468, quoting, Concord Twp. Appeal, 439 Pa. 466, 474, 268 A.2d 765, 768-69 (1970).
This Court’s ruling in Willistown rested upon the premise of Girsh that where a municipal subdivision “is a logical place for development to take place, it should not be heard to say that it will not bear its rightful part of the burden.” Appeal of Girsh, supra, 437 Pa. at 245, 263 A.2d at 399. It also embraces the more basic proposition that a political subdivision cannot isolate itself and ignore the housing needs of the areas surrounding it. To implement these concepts, we adopted the “fair share” principle, which requires local political units to plan for and provide land-use regulations which meet the legitimate needs of all categories of people who may desire to live within its boundaries. Mr. Justice O’Brien, speaking for this Court in Willistown, stated:
[190]*190“The New Jersey Supreme Court, in Southern Burlington County NAACP v. Twp. of Mount Laurel, 67 N. J. 151, 336 A.2d 713 (1975), in discussing a zoning ordinance which provided for a total exclusion of apartment dwellings, stated:
‘We conclude that every such municipality must, by its land use regulations, presumptively make realistically possible an appropriate variety and choice of housing. More specifically, presumptively it cannot foreclose the opportunity of the classes of people mentioned for low and moderate income housing and its regulations must affirmatively afford that opportunity, at least to the extent of the municipality’s fair share of the present and prospective regional need therefor. These obligations must be met unless the particular municipality can sustain the heavy burden of demonstrating peculiar circumstances which dictate that it should not be required so to do.’ (Emphasis in original).
Nor are we convinced by Willistown’s argument that Chesterdale’s development plans would overburden its municipal services. Suburban municipalities within the area of urban outpour must meet the problems of population expansion into its borders by increasing municipal services, and not by the practice of exclusionary zoning.”7 Id. 462 Pa. at 449-450, 341 A.2d at 468.
[191]*191Some commentators have expressed concern that judicial adoption of the “fair share” test will thrust courts into the role of super boards of adjustment, thereby usurping a function that is more properly legislative or administrative in nature.8 Such concern shows a misconception of what we contemplate our role will be. In establishing the “fair share” standard, this Court has merely stated the general precept which zoning hearing boards and governing bodies must satisfy by the full utilization of their respective administrative and legislative expertise. We intend our scope of review to be limited to determining whether the zoning formulas fashioned by these entities reflect a balanced and weighted consideration of the many factors which bear upon local and regional housing needs and development.
The case law of this jurisdiction, as developed by this Court as well as the Commonwealth Court, both before and after our decision in Willistown, is instructive as to the relevant factors to which a court must look in conducting a review of zoning ordinances which are alleged to be exclu[192]*192sionary. From this body of law a useful analytical method can be synthesized to aid our review. The initial inquiry must focus upon whether the community in question is a logical area for development and population growth. Girsh Appeal, supra; National Land and Investment Co. v. Easttown Twp. Bd. of Adjustment, supra. The community’s proximity to a large metropolis and the community’s and region’s projected population growth figures are factors which courts have considered in answering this inquiry. Waynesborough Corp. v. Easttown Twp. Zoning Hearing Bd., 23 Pa.Cmwlth. 137, 143, 350 A.2d 895, 898 (1976).
Having determined that a particular community is in the path of urban-suburban growth, the present level of development within the particular community must be examined.9 Population density data and the percentage of total undeveloped land and the percentage available for the development of multi-family dwellings are factors highly relevant to this inquiry. Twp. of Willistown v. Chesterdale Farms, Inc., supra; National Land and Investment Co. v. Easttown Twp. Bd. of Adjustment, supra; Waynesborough Corp. v. Easttown Twp. Zoning Hearing Bd., supra; DeCaro v. Washington Twp., 21 Pa.Cmwlth. 252, 254, 344 A.2d 725, 726 (1975).
Assuming that a community is situated in the path of population expansion and is not already highly developed, this Court has, in the past, determined whether the challenged zoning scheme effected an exclusionary result or, alternatively, whether there was evidence of a “primary purpose” or exclusionary intent to zone out the natural growth of population. Twp. of Willistown v. Chesterdale [193]*193Farms, Inc., supra, citing, National Land and Investment Co., supra; Concord Twp. Appeal, supra. Because the Willistown “fair share” test compels judicial examination of the actual effect of a zoning ordinance upon the availability of multi-family dwellings, evidence of exclusionary motive or intent, whether direct or circumstantial, is not of critical importance.10 Thus, Willistown marked an implicit departure away from judicial inquiry into the motives underlying a particular zoning ordinance.11 Our primary concern now is centered upon an ordinance’s exclusionary impact.
[194]*194In analyzing the effect of a zoning ordinance, the extent of the exclusion, if any, must be considered. Is there total exclusion of multi-family dwellings, which we disapproved in Girsh Appeal, supra, or is the exclusion partial ? If the zoning exclusion is partial, obviously the question of the ordinance’s validity is more difficult to answer. In resolving this issue, once again the percentage of community land available under the zoning ordinance for multi-family dwellings becomes relevant. This percentage must be considered in light of current population growth pressure, within the community as well as the region, and in light of the total amount of undeveloped land in the community. Where the amount of land zoned as being available for multi-family dwellings is disproportionately small in relation to these latter factors, the ordinance will be held to be exclusionary.12
It now remains to apply this analytical matrix to the facts of the instant case to ascertain if the ordinance in question reflects the proper consideration of the above-discussed factors. There can be little doubt that Upper Providence Township is a logical area for development and population growth. This conclusion is supported by the fact that the township is located a mere twelve miles or so from Philadelphia and is situated at the intersection of two main traffic arteries, one of which, Route 1, is a direct link with the city. See Girsh Appeal, supra; National Land and Investment Co. [195]*195v. Easttown Twp. Bd. of Adjustment, supra; Waynesborough Corp. v. Easttown Twp. Zoning Hearing Bd., supra. The record shows that the township is not a high density population area; roughly one-quarter of the township land is undeveloped. Thus the township’s present level of development does not preclude further development of multi-family dwellings. See note 9 supra.
The zoning ordinance in question results in a partial exclusion of multi-family dwellings, providing, as it does, 1.14% of the township land for development of multi-family dwellings. It is also significant that multi-family dwellings are only one of more than a dozen other uses permitted on this fraction of land. See note 4 supra. Therefore, this land is not set aside for the exclusive use of multi-family dwellings; development of such dwellings must compete with the other uses permitted in the B district. The above analysis leads inescapably to the conclusion that the facts of the instant case are legally indistinguishable from those in Willistown,13 Thus we hold that Upper Providence Township [196]*196has not provided a “fair share” of its land for development of multi-family dwellings. Twp. of Willistown v. Chesterdale Farms, Inc., supra.
We therefore direct that zoning approval for appellant’s land be granted and that a building permit be issued conditional upon appellant’s compliance with the administrative requirements of the zoning ordinance and other reasonable controls and regulations which are consistent with this opinion. Id.
JONES, former C. J., did not participate in the decision of this case.
POMEROY, J., did not participate in the consideration or decision of this case.
MANDERINO, J., concurred in the result.