How to Underwrite a Value-Add Multifamily Deal

The renovation premium is the rent increase a unit commands after a defined scope of work, and it is the number the entire underwriting rests on. Before modeling returns, a sponsor needs evidence that the premium is real: renovated comparable units in the same submarket, leased in the last six to twelve months, at rents that support the increase the pro forma assumes. A premium pulled from a broker opinion of value without matching comps is a guess, not underwriting.

As an illustration, a property with current in-place rents of $1,400 for a one-bedroom unit might support a renovated rent of $1,650 after new flooring, countertops, and appliances, a $250 premium. That premium only holds if at least two or three renovated comparable units in the same submarket are actually leasing near $1,650, not listed near it. A sponsor who underwrites the full premium on every unit without confirming lease-up at that level overstates the deal's stabilized income.

Rent comps carry the underwriting, so the process for building them matters as much as the conclusion. Pull comparable properties by unit mix, vintage, and location first, then confirm which units in each comp were actually renovated and to what scope. A comp with granite countertops and stainless appliances is not evidence for a scope that only replaces flooring and fixtures.

Weight comps by how closely their scope matches the subject property's planned renovation, and discount any comp more than a mile away or outside the immediate submarket unless the market is genuinely homogeneous. A rent roll showing five renovated comps at $1,600 to $1,700 supports a $1,650 target far better than two comps with a wide spread.

The renovation budget has to price the actual scope, unit by unit, not a blended per-unit average pulled from a different deal. Interior scope, common area and amenity work, and any capital items like roofs, boilers, or parking should each carry their own line item with a sourced cost, whether from a contractor bid, a recent comparable project, or a reliable cost guide.

A contingency line of 10 to 15 percent of hard costs is standard for a value-add scope with no structural or major system unknowns, and sponsors typically push toward 15 to 20 percent when the property has deferred maintenance that has not been fully inspected. As an illustration, a $2,000,000 renovation budget with a 12 percent contingency carries an additional $240,000 the plan can draw on without forcing a capital call or a paused renovation.

Every renovated unit produces zero income while it is offline, and the underwriting has to capture that cost directly rather than folding it into a vague absorption assumption. Build a unit-by-unit turn schedule that states how many units renovate per month, how long each unit stays offline, and how long it takes to lease a finished unit at the new rent.

As an illustration, a 100-unit property renovating eight units a month, each offline for 21 days, loses roughly $11,000 in gross rent per month during the heaviest renovation stretch at an average premium rent of $1,650. Spread across an 18-month renovation, that downtime cost is real money the pro forma needs to carry as an operating line, not ignore.

The exit cap rate is where value-add underwriting most often goes wrong, because it is tempting to assume the cap rate compresses along with the improved income. A defensible exit cap rate starts at or above the entry cap rate and only moves in the sponsor's favor with a specific, market-supported reason, such as a genuine improvement in asset quality relative to the submarket's stabilized comps.

As an illustration, a deal underwritten to enter at a 6.0 percent cap rate should generally exit at 6.25 percent or higher, not 5.75 percent, unless recent stabilized sales in the submarket clearly support compression. Underwriting a lower exit cap rate than the entry cap rate to make a return work is one of the fastest ways a value-add deal underperforms its projection.

Many value-add plans exit through a refinance into permanent debt rather than a sale, which means the underwriting has to test whether the stabilized property actually supports that takeout loan. Calculate the stabilized net operating income, then size the refinance loan against both a target debt service coverage ratio, typically 1.25x or higher, and a target loan-to-value ratio a permanent lender would apply.

As an illustration, a property stabilizing at $900,000 in net operating income might support a refinance loan sized to a 1.25x debt service coverage ratio at prevailing rates, producing a loan amount that returns a meaningful share of invested equity. If the refinance test produces a loan well below what the business plan assumed for returning capital, the plan needs a sale exit or additional equity, not a hopeful rate assumption.

A single base-case model tells a sponsor what happens if every assumption holds, which is rarely how a renovation actually goes. Building sensitivity cases around the rent premium, the renovation budget, the timeline, and the exit cap rate shows how much room the deal has before the return breaks, and where the underwriting is most exposed. Running a base case, a downside case, and a stress case together gives a lender or investor a realistic range rather than one optimistic number.

As an illustration, dropping the rent premium from $250 to $175 per unit, adding three months to the renovation timeline, and moving the exit cap rate up 25 basis points might turn a projected 18 percent internal rate of return into something closer to 11 percent. If that downside case still clears the return threshold a lender or investor needs, the deal has real margin; if it does not, the plan is underwriting hope, not evidence.

The most common mistake is underwriting the full rent premium on every unit from day one, ignoring the renovation and lease-up schedule that keeps units offline and empty for months at a time. A close second is sizing the contingency off a generic percentage without adjusting for what the property's condition report and inspection findings actually show, which understates risk on an older asset with deferred maintenance.

A third mistake is setting the exit cap rate below the entry cap rate to make the return work on paper, and a fourth is skipping the refinance test entirely when the exit plan depends on a takeout loan rather than a sale. Each of these mistakes shows up the same way: a return that looks strong in the base case and collapses under a modest, realistic stress test.

H Equities evaluates and structures first mortgage bridge loans from $5 million to $50 million, interest-only, with terms typically 12 to 24 months, nationwide, and provides mezzanine loans, preferred equity, and co-GP equity alongside a bridge loan when a value-add capital stack needs more than one layer. Sponsors bring in H Equities once the renovation budget, timeline, and exit cap rate are underwritten and the request needs a capital provider comfortable with a plan-based, rather than trailing-income-based, deal.