Financial Analysis: What the Rezoning Is Worth
A developer pro forma for the proposed Spruce Path development at 86–96 Spruce Street
Contents
TL;DR
The AH-12 rezoning handed Barsky Enterprises permission to build at 61 units per acre on a site zoned for 17. That density premium — the upzoning value — is worth an estimated $8–10 million in additional asset value, transferred from the public to the developer at no cost.
In exchange, the community received 2 affordable units above what the law already requires. The mandatory 20% inclusionary set-aside would have produced 6 affordable units from any 30-unit development. The AH-12 ordinance produces 8 — a net addition of 2 units.
The implicit public subsidy per additional affordable unit — measured as the net present value of rent foregone over the 30-year deed restriction period — is approximately $260,000 per unit.
Put differently: Princeton rezoned a residential block to densities exceeding every other zone in the municipality, waived standard stormwater, traffic, and fire access requirements, and provided no compensation to neighbors — in exchange for 2 affordable apartments worth roughly $525,000 in NPV terms, against an upzoning gift of $8–10 million. The implied exchange ratio is approximately 16:1.
Methodology and assumptions
This analysis estimates the developer’s pro forma using publicly available construction cost benchmarks, Princeton-area rental market data, and standard real estate valuation methods. All figures are estimates. The goal is not precision but order-of-magnitude transparency about the financial stakes of the rezoning.
Site and building program
From the architect’s plans (Marina Rubina, Architect, dated 05.30.2025) and confirmed unit dimensions:
| Component | Units | Unit size | GFA |
|---|---|---|---|
| Main building — 1BR apartments | 20 | 600 sqft | 12,000 sqft |
| Main building — large units (3BR) | 3 | 1,985 sqft | 5,955 sqft |
| Townhouses (Lot 64, 3 floors) | 6 | 650 sqft | 3,900 sqft |
| Standalone home | 1 | 1,500 sqft | 1,500 sqft |
| Existing buildings (retained) | 2 | — | ~4,000 sqft |
| Total new construction | 30 | ~23,355 sqft |
The combined site is 0.66 acres. Total units after development: 42 (12 existing + 30 new).
The unit mix skews heavily toward small 1BR and studio-scale apartments (26 of 30 new units are under 700 sqft), with 3 large premium units likely commanding 3BR rents. This mix is financially significant: small units maximize unit count per sqft of construction, improving the developer’s yield per dollar spent.
Construction cost
New multifamily construction in New Jersey runs approximately $300–$450 per square foot for hard costs in 2025, reflecting NJ’s above-average labor and materials costs. This analysis uses $350/sqft as the baseline for the 23,355 sqft of new construction.
Soft costs — architecture, engineering, permits, legal fees, and construction loan interest — typically add 20–25% to hard costs on projects of this scale. Land is excluded from this analysis — the developer acquired the parcels prior to the rezoning and carries no land acquisition cost in the pro forma.
| Cost category | Estimate |
|---|---|
| Hard costs (23,355 sqft × $350/sqft) | ~$8.2M |
| Soft costs (~25% of hard) | ~$2.0M |
| Financing costs (~6% of total) | ~$0.7M |
| Total development cost | ~$10.9M |
The small unit sizes — 600 sqft for the 1BR units, 650 sqft for the townhouses — are financially significant. The developer maximizes unit count (and therefore rental income) while minimizing construction cost per unit. At 26 of 30 new units under 700 sqft, this project achieves high density at relatively low construction cost per dollar of GFA.
Rental income
Market-rate rents in Princeton averaged $2,650–$2,886/month for 1-bedroom units and $3,949/month for 2-bedroom units as of 2025. The Spruce Street location commands a modest discount to downtown Princeton; this analysis uses $2,800/month for 1BR and $3,400/month for 2BR market-rate units.
Affordable rents are set by New Jersey’s UHAC regulations at 30% of income for households at very low (50% AMI), low (60% AMI), and moderate (80% AMI) income levels. The actual rents at 195 Nassau Street — a comparable new affordable development in Princeton managed by Princeton Community Housing — provide the most direct benchmark available:
| Unit type | Income tier | Monthly rent |
|---|---|---|
| Studio | Low | $980 |
| 2-bedroom | Very low | $589 |
| 2-bedroom | Low | $1,195 |
| 2-bedroom | Moderate | $1,468 |
| 3-bedroom | Low | $1,355 |
| 3-bedroom | Moderate | $1,670 |
Source: Princeton Community Housing, 195 Nassau Street listing, 2025–2026.
Income eligibility at 195 Nassau is capped as follows: $47,150 for a single-person household; $86,160 for two persons; $96,960 for three; $107,680 for four.
The ordinance requires 8 affordable units. The bedroom mix is not yet public. Given the unit sizes — the 6 townhouse units on Lot 64 (650 sqft) and the smallest studio-scale 1BR units in the main building (600 sqft) are the most likely candidates — the affordable units will be predominantly studio or 1BR tier, consistent with the $980/month low-income studio at 195 Nassau. This analysis uses $980/month as the affordable unit rent.
New market-rate unit mix and estimated rents:
| Unit type | Count | Size | Est. monthly rent | Annual gross |
|---|---|---|---|---|
| 1BR, 600 sqft (main building, market-rate) | 18 | 600 sqft | $2,400 | $518,400 |
| Large units, 1,985 sqft (main building) | 3 | 1,985 sqft | $4,200 | $151,200 |
| Standalone home, 1,500 sqft | 1 | 1,500 sqft | $3,200 | $38,400 |
| New market-rate subtotal | 22 | ~$708,000 |
Note: The 6 townhouse units (650 sqft, Lot 64) and 2 of the 1BR studio-scale units are designated affordable, accounting for all 8 required units. Existing retained units are shown separately in the income table below.
Stabilized annual gross income:
| Income stream | Annual |
|---|---|
| New market-rate units (22 units) | ~$708,000 |
| Affordable units (8 units, avg $980/mo) | ~$94,000 |
| Existing retained units (12 units, avg $1,800/mo est.) | ~$259,200 |
| Gross potential rent | ~$1,061,000 |
Net operating income and asset value
Applying a standard vacancy and operating expense ratio of 30% (conservative for a new building in a high-demand Princeton market):
| Item | Amount |
|---|---|
| Gross potential rent | ~$1,061,000 |
| Less vacancy + operating expenses (30%) | (~$318,300) |
| Net operating income (NOI) | ~$742,700 |
Capitalizing at a 5.5% cap rate (appropriate for stabilized multifamily in suburban NJ):
Estimated stabilized asset value: ~$13.5M
Against a total development cost of approximately $10.9M (no land acquisition — the developer already owned the parcels), the developer’s equity profit at stabilization is approximately $2.6M — before accounting for refinancing proceeds and long-term appreciation. The smaller GFA and lower construction cost relative to income makes this a meaningfully profitable project on a cost-in basis.
The upzoning value
The most significant financial transfer is not the profit margin but the upzoning value — the increase in land and asset value created by the AH-12 zoning that would not exist under by-right zoning.
The adjacent R4A affordable housing overlay — the next most permissive residential zone on Hamilton Avenue directly behind these lots — permits approximately 17 units per acre. Applied to 0.66 acres, by-right density would yield approximately 11 units — closely matching the 12 units (10-unit apartment building plus a duplex) that already exist on the site today.
| Scenario | Units | Est. NOI | Est. Asset Value |
|---|---|---|---|
| By-right / existing (R4A, ~17 du/acre) | ~12 | ~$275,000 | ~$5.0M |
| AH-12 as proposed (61 du/acre) | 42 | ~$743,000 | ~$13.5M |
| Upzoning value | ~$8.5M |
Even using conservative assumptions, the upzoning created by Ordinance #2026-07 is worth approximately $8.5 million in additional asset value. This value was created by a municipal ordinance, not by the developer’s capital or ingenuity. It transferred directly to the developer.
The affordable unit subsidy
NJ affordable housing deed restrictions run for a minimum of 30 years. During that period, affordable units generate significantly less income than market-rate units. The difference — what the units would earn at market rate versus what they actually earn — represents the developer’s contribution to affordability.
The net present value of that rent differential, discounted at 5% over 30 years, is the implicit public subsidy — the value the developer accepts below market in exchange for the rezoning.
The 600 sqft 1BR units — the most common market-rate type in the development — rent at approximately $2,400/month. Affordable units at the same size tier (comparable to the $980/month low-income studio at 195 Nassau) generate roughly $980/month. The annual rent differential per affordable unit is therefore approximately $17,040.
| Calculation | Amount |
|---|---|
| Market rent foregone per affordable unit (annual) | ~$17,040 |
| Total for 8 units (annual) | ~$136,320 |
| NPV at 5% discount rate over 30 years | ~$2.1M |
| Of which: units above the 6-unit legal mandate (2 units) | ~$525,000 |
The net public subsidy received in exchange for ~$8.5M in upzoning value: approximately $525,000.
Or framed differently: the municipality gave the developer $8.5 million in rezoning value in exchange for 2 affordable apartments worth $525,000 in NPV terms — a ratio of roughly 16:1.
This does not mean the development is without public benefit. The 6 mandatory affordable units have real value to their occupants. But those 6 units would have been required of any 30-unit development in Princeton under the standard 20% inclusionary set-aside — no special zoning required.
What was waived
The upzoning value calculation above does not capture the value of the regulatory waivers embedded in the AH-12 district:
- 75% impervious coverage vs. 30% in all adjacent zones — eliminates stormwater management costs the developer would otherwise bear
- 5-foot rear setback vs. 20+ feet in adjacent zones — maximizes buildable area
- 5-foot building separation vs. 15 feet in R4A — enables the 23-unit mass building form
- No stormwater study required — avoids the kind of 831-page engineering analysis required of The Alice at Princeton Shopping Center, a comparable-density development
- No traffic impact study required — avoids mitigation costs on Hamilton Avenue and Pine Street
Each of these waivers has a dollar value. They are not captured in this analysis, which means the total value transferred to the developer is likely higher than the figures above suggest.
Summary
| Metric | Estimate |
|---|---|
| Total new GFA | ~23,355 sqft |
| Total development cost | ~$10.9M |
| Stabilized asset value | ~$13.5M |
| Developer profit at stabilization | ~$2.6M |
| Upzoning value (AH-12 vs. by-right R4A) | ~$8.5M |
| NPV of affordable rent subsidy (all 8 units, 30 yr) | ~$2.1M |
| NPV attributable to the 2 net additional affordable units | ~$525,000 |
| Implied exchange ratio (upzoning value : net affordable NPV) | ~16:1 |
Caveats
This analysis is a pro forma estimate, not a certified appraisal. Key uncertainties include:
- The actual bedroom mix and rent schedule of the 8 affordable units (not yet public)
- Whether the development will include below-grade parking (which would significantly increase hard costs)
- Future Princeton rental market conditions over the 30-year deed restriction period
- Whether the development will be sold, refinanced, or held — each produces different returns
This analysis is provided to give neighbors a factual basis for understanding the financial stakes of the rezoning. It does not purport to represent the developer’s actual internal projections.
Citations and sources
Construction costs
- National Multifamily Housing Council / Multifamily Loans: average multifamily hard cost ~$350/sqft nationally (2023–2025)
- New Jersey residential construction: $293–$370/sqft average (2025), per multiple industry benchmarks
- NJ above-average labor and materials costs confirmed by NAHB and state-level surveys
Princeton rental market
- Walkable Princeton survey of Princeton rental listings (November 2025): average 1BR ~$2,650–$2,886/month
- Apartments.com: Princeton average rent ~$2,650/month (2025)
- Zillow: Princeton 1BR average ~$2,411/month (2025)
- 195 Nassau (market rate): starting at $3,900/month for 1BR (ApartmentList, 2025)
Affordable rents
- Princeton Community Housing, 195 Nassau Street listing (pchhomes.org/195nassau, accessed April 2026)
- Income eligibility thresholds per NJHMFA UHAC regulations, effective May 2025
Zoning and density comparisons
- Princeton Ordinance #2026-07 (AH-12 district bulk standards)
- Princeton 2023 Master Plan and Reexamination Report
- Princeton Fourth Round Housing Plan Element and Fair Share Plan (filed June 2025, Mercer County Superior Court Docket MER-L-000207-25)
Valuation methodology
- Cap rate: 5.0–5.5% consistent with stabilized suburban NJ multifamily (CoStar, 2024–2025)
- NPV discount rate: 5.0% (approximate cost of long-term capital)
- 30-year deed restriction period per Princeton Ordinance #2020-15 and N.J.A.C. 5:80-26.1
This analysis was prepared by Adam Wolf, 82 Spruce Street, Princeton NJ. It is provided for informational purposes only and does not constitute legal or financial advice. Corrections or additional data are welcome: adam.von.wolfhausen@gmail.com