How HUD Sizes a 221(d)(4) New Construction Mortgage

The HUD 221(d)(4) program provides FHA mortgage insurance for the new construction of multifamily properties. It's a single mortgage that covers both the construction period and the permanent loan — at initial closing, the full mortgage amount is insured, construction draws are funded through a HUD-supervised draw process, and the loan converts to the permanent phase at certificate of occupancy. The permanent loan is a 40-year fully amortizing fixed-rate note (meaning no interest rate risk with a perm refinance), non-recourse to the sponsors.

The 221(d)(4) is a cost-based program. The loan is sized against total eligible development cost — not appraised value.

The 40-year amortization produces a lower annual loan constant than shorter-term programs, which means a given NOI can support a larger loan balance. Combined with the 1.15x minimum DSCR, the 221(d)(4) is structurally more aggressive on proceeds than conventional construction-to-permanent financing, which typically requires 1.25x DSCR and a shorter amortization period (often 25-30 years).

The LTC test applies 87% (market rate) or 90% (affordable) to the total eligible development cost. Total development cost is not just hardcosts — it's everything required to complete and close the HUD loan: hardcosts, architect and engineering fees, city development fees, third-party report costs, legal fees, title and recording, survey, taxes and insurance during construction, lender and HUD fees, and construction period interest. Note that some "developer costs" are not considered eligible. Things like a development fee (if a for-profit borrower), demolition, and commercial TIs are not eligible and are not included in the mortgageable costs.

One element of the LTC calculation that surprises developers coming from conventional construction lending is the treatment of land. HUD uses the appraised fair market value of the land, not the developer's actual acquisition cost. If a developer acquired a site five years ago at $1.5 million and it now appraises at $2.5 million, HUD uses $2.5 million as the land value in the LTC calculation. That increase in land value flows directly into a higher cost basis, which produces a higher LTC-constrained loan amount. The developer effectively captures the appreciation in their land basis as additional loan proceeds.

Builder's and Sponsor's Profit and Risk Allowance (BSPRA) — (read a full, detailed white paper explaining the ins and outs of BSPRA here) — is an addition to total development cost equal to 10% of all project costs excluding land. It's available when the developer has an identity-of-interest with the general contractor (we often make this identity-of-interest artificially if there isn't one already). Mechanically, BSPRA increases cost basis without requiring the developer to spend additional money — because the LTC percentage is applied to that larger cost base, it directly increases the maximum loan amount. On a $28 million development, BSPRA adds roughly $2.5–$3 million to the indicated mortgage because the cost basis used to calculate the LTC loan increased by nearly 10%. If the developer does not have an identity-of-interest with the GC, BSPRA can be replaced by SPRA, which is 10% on everything but land and the hardcosts. The sizing tool below assumes BSPRA eligibility — confirm your deal structure before relying on the LTC figure.

Because there's no operating history on a new construction deal, HUD sizes the DSCR test against the projected stabilized NOI developed by the third-party appraiser — underwritten at current market rents and current operating expenses, not at projected future rents at the time the project leases up. If a developer believes rents will be 15% higher two years from now when the project opens, that expectation doesn't factor into the sizing. HUD sizes against what the market supports today.

The appraiser develops a stabilized income projection with a minimum 7% vacancy for market-rate deals, and replacement reserve deposits are based on the Property Capital Needs Assessment rather than a per-unit estimate. Because the project is new construction, the capital needs assessment will typically produce low replacement reserves — new buildings need less near-term capital expenditure — which means the Debt Service NOI on a new construction deal is often close to the stabilized market NOI. HUD's vacancy floor applies regardless of how tight the market is or how strong lease-up projections look.

To size the DSCR-constrained loan: multiply the Debt Service NOI by 0.87 (the arithmetic equivalent of 1.15x minimum DSCR) to get the maximum allowable annual debt service, then divide by the loan constant. The loan constant is the sum of the interest rate, the annual permanent MIP (0.25%), and the amortization rate at the note rate over 40 years. The 40-year amortization produces a lower constant than shorter-term programs, which means a given NOI budget supports a larger loan balance.

Higher rates produce a higher loan constant, which reduces the DSCR-constrained loan amount for the same NOI. There's an additional rate channel unique to construction loans: construction period interest is a variable cost that scales with both the loan amount and the interest rate. As rates rise, construction interest as a percentage of the loan increases, which also pushes up the variable cost component of the LTC calculation. Both tests tighten simultaneously as rates move higher.

HUD publishes per-unit dollar limits by bedroom count that establish an absolute ceiling on the loan, independent of both development cost and income. The base statutory limits for new construction are set by statute and are generally higher than the limits that apply to refinance programs, reflecting the higher per-unit cost of delivering new construction relative to the stabilized value of existing properties.

The High Cost Percentage (HCP) factor is applied uniformly at 270% across all markets, multiplying the base per-unit limits upward. To the statutory unit calculation, HUD adds two additional items: Cost Not Attributable to residential use (estimated at 15% of hardcosts for new construction), and 100% of the appraised land value. Cost Not Attributable covers commercial space, community facilities, and non-residential building components.

On most new construction deals, the statutory limit is not the binding constraint. The per-unit limits — particularly at 270% HCP — are generous enough that LTC or DSCR will produce the lower loan amount in the vast majority of markets. The exception is very large-unit properties in high-rent metros where income and development costs would otherwise support a very large loan. Worth running the calculation, but it should not drive early-stage deal decisions in typical markets.

The actual loan amount is the lowest result across all three tests. In practice:

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Normal construction costs, low market interest rates —

LTC is typically the binding constraint. DSCR on a new construction deal — sizing against current stabilized rents at a low rate — frequently supports a larger loan than the LTC ceiling allows. The developer's cost structure is what limits the loan.

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Normal construction costs, high market interest rates —

DSCR is more likely to bind. Higher rates push up the loan constant, reducing the income-supported loan amount while the construction budget has not necessarily decreased correspondingly.

The tool below runs all three mortgage amount tests simultaneously so you can see which one is binding and by how much. Changing the construction costs, adjusting the NOI, or adjusting unit counts will show you in real time how the binding constraint shifts.

Does HUD require a third-party appraisal on a new construction deal if there's no appraised value test?
Yes. HUD still commissions an independent appraisal on every 221(d)(4). The appraiser establishes the projected stabilized value of the completed project — which feeds the DSCR test through the appraiser's NOI estimate — and also provides the appraised land value used in the LTC and statutory calculations. The appraisal doesn't set a ceiling on loan proceeds, but it's a required third-party report and its inputs are central to the sizing.

Is the 221(d)(4) available for affordable housing with tax credits?
Yes, and it's commonly used in LIHTC transactions. Affordable deals qualify for the higher 90% LTC ceiling and the 1.11x minimum DSCR. The interaction between the 221(d)(4) and the LIHTC equity structure involves a separate set of HUD requirements around equity pay-in timing and credit enhancer approvals, which are beyond the scope of this article — contact us if you're working on a tax credit deal.

How does construction period interest get factored into the loan sizing?
Construction interest is treated as a variable cost in the LTC calculation — it's calculated as approximately half the loan balance multiplied by the interest rate, for the duration of the construction term. The "half the balance" assumption reflects the draw structure: draws happen progressively over the construction period, so the average outstanding balance over the term is roughly 50% of the final loan amount. The sizing tool uses this convention, which is standard in HUD underwriting. Because construction interest scales with both the loan amount and the rate, it creates a second rate-sensitive term in the LTC constraint — higher rates increase the construction interest escrow, which increases total development cost, which will increase the LTC constrained mortgage amount.