The opinion of the court was delivered by
As in
Cоmmercial Realty and Resources Corp. v. First Atlantic Properties Co.,
122
N.J.
546,
I
The procedural history is set forth in the Appellate Division’s opinion, 235
N.J.Super.
at 599-603,
Defendant Roc Harbor Corp. (Roc Harbor) seеks to develop a 21.5-acre parcel of waterfront property in North Bergen, approximately seven acres of which is underwater. Its most recent application to the North Bergen Planning Board for *572 site-plan approval proposed construction of 128 low-rise residential units in thirty-one separate buildings; three nineteen-story towers containing a total of 551 high-rise units, each tower including a three-story parking garage; and a 210-slip marina. The applicant also sought variances from the forty-foot height limitation in the zoning ordinance. 1
.The North Bergen Planning Board had previously granted height variances and site-plаn approval in 1982 with respect to a similar version of the same project. The Law Division had set aside that approval, determining that the North Bergen Municipal Port Authority (Port Authority) had jurisdiction over the application.
Id.
at 29,
In its latest presentation before the Planning Board, Roc Harbor’s expert witnesses advanced two grounds in support of the height variance. First, Roc Harbor’s architect testified that the substandard soil conditions on the site required the installation of pilings to support the proposed structurеs, and that despite cost projections based on soil borings, the actual depth of the pilings and their resultant cost was substantially greater *573 than had been anticipated. He testified that because of those higher costs, the project would not be economically feasible unless high-rise construction was permitted. He also testified that high-rise construction would increase the amount of open space on the site. The applicant’s architect was uncertain whether developing the project with seven- or eight-story structures, rather than nineteen-story, would be economically feasible. A real-estate еxpert testified that the proposed development would not have “any adverse effect or impact * * * on the intent of the Zoning Ordinance,” or on property values in the immediate neighborhood. Responding to an inquiry from the Board’s attorney, Roc Harbor’s counsel stated that it sought the height variance pursuаnt to subsection c(2) of N.J. S.A. 40:55D-70, although he indicated that the variance could also be granted on the basis of “hardship.”
The Board granted site-plan approval and height variances permitting construction of the three towers at a height not to exceed 177.9 feet. The Board also granted a variance from a minor violation of the ordinance’s land-coverage limitation. The Planning Board’s resolution noted the substandard soil conditions on the site, observing that it would be “economically unfeasible” for the applicant to construct only townhouses. The Board’s resolution recited that the site’s “special conditions oрerate as a hardship upon the applicant,” and also noted that “balancing of the utility of the two requested variances versus the intent of the zoning ordinance leads to the conclusion that the variances should be granted.” The resolution also included a conclusory statement that the negative criteria were satisfied, noting that “[t]he bulk of the three highrise buildings will be below the height of the Palisades.”
The Law Division did not address the substantive sufficiency of the proofs offered to support the height variance. Although observing that some height variances could be cognizable under subsection c of N.J.S.A. 40:55D-70, the trial court concluded that the proposed height variance contemplated so qualitative a change in the intensity of the use permitted by the ordinance as *574 to be “the equivalent of an actual change-in use.” The Law Division noted that although the applicable ordinance did not regulate density, the height limitation had “the practiсal effect of a density restriction.” Accordingly, the trial court set aside the Planning Board’s approval, concluding that only the board of adjustment could grant the required height variances.
Roc Harbor appealed the Law Division’s ruling to the Appellate Division and concurrently sought approval of the height variances from the North Bergen Board of Adjustment. Although by virtue of the pending appeal the Appellate Division possessed the inherent authority to restrain the Board of Adjustment proceeding, see Rule 2:9-1, no such relief was sought. The Board of Adjustment granted the height variances. Respondents in this proceeding instituted new actions, consolidated in the Law Division, challenging the Board of Adjustment’s approval of the variances. Instead of staying the effect of the Board of Adjustment’s approval pending the Appellate Division’s disposition of the pending appeal, the Law Division heard argument and reversed on substantive grounds the Board’s grant of the height variances. Roc Harbor appealed that decision to the Appellate Division, but that appeal has since been administratively dismissed. Our disposition of this appeal renders moot both the variances granted by the Board of Adjustment and the Law Division’s reversal of those variances.
As noted, the Appellate Division affirmed the Law Division’s holding that the height variances were cognizable only by the Board of Adjustment. 235
N.J.Super.
at 604,
II
In
Commercial Realty, supra,
We note respondent’s contention that because a. municipal restriction on height can operate as a form of density regulation, variances from height, just as density variances, should be reviewed under subsection d of N.J.S.A. 40.-55D-70. The short answer is that the Legislature has made a different judgment, apparently concluding that variances from density and floor-area ratio, but not from height, warrant the more protective standard of subsection d. We note also the obvious distinction: height restrictions may affect density, but they need not, because structures that exceed height limitations may comply with density regulations. 2
We also noted in
Commercial Realty, supra,
that although the grant of a substantial height variance “has the potential to disrupt a municipal zone plan,” nevertheless “the affirmative and negative criteria for bulk variances pose a formidable obstacle to such applications.” 122
N.J.
at 563,
The Planning Board resolution refers generally to the criteria for both subsection c(l) (“hardship”) and c(2) variances. With respect to c(l), the resolution refers to the soil conditions *577 on the site and, indirectly, to the economic impact on the project of the cost of pilings, concluding that such circumstances constitute a “hardship” within the contemplation of subsection c(l). We acknowledge that substandard soil conditions may well be encоmpassed by the statutory phrase “exceptional topographic conditions or physical features uniquely affecting a specific piece of property,” N.J.S.A. 40:55D-70c(l), and evidence of such conditions may be considered in determining whether strict enforcement of the ordinance’s height limitations would rеsult in “exceptional and undue hardship” because the property’s distinctive physical characteristics inhibit its development. 3 On remand, the Appellate Division will determine whether the record establishes that strict enforcement of the ordinance’s height restrictions is unwarranted because of the substandard soil cоnditions and demonstrates a sufficient relationship between the substandard soil conditions and the magnitude of the height variances granted by the Planning Board.
The Planning Board resolution also concludes that a “balancing of the utility of the * * * variances versus the intent of the zoning ordinance” supports the grant of the variancеs, apparently referring to the subsection c(2) criteria requiring a comparison between the “benefits of the deviation
*578
[and] * * * any detriment.”
N.J.S.A.
40:55D-70c(2). See
Kaufmann v. Planning Bd. for Warren Township,
110
N.J.
551, 563-65,
Finally, we note the resolution’s conclusory determination that the negative criteria have been satisfied. Although the grant of bulk variances does not generally require the enhanced quality of proof concerning the negative criteria that is mandated for use variances, see
Medici v. BPR Co.,
107
N.J.
1, 21-22,
The judgment of the Appellate Division is reversed and the matter rеmanded to that court for further proceedings consistent with this opinion.
*579 For reversal and remandment — Chief Justice WILENTZ, and Justices CLIFFORD, HANDLER, POLLOCK, O’HERN, GARIBALDI and STEIN — 7.
Opposed —None.
Notes
The Appellate Division expressed uncertainty over whether the applicable height restriction was forty feet, pursuant to a 1982 ordinance, or seventy-five feet, pursuant to a 1985 ordinance. 235
N.J.Super.
at 599,
The Appellate Division opinion notes that a 1985 zoning ordinance contained a density limitation of seventy-five units per acre, and refers to the conflicting contentions of Roc Harbor and respondents in respect of compliance with that limitation. 235
N.J.Super.
at 602-03,
We noted in
Kaufman v. Planning Board for Warren Township,
110
N.J.
551,
