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5SECONDMODEL COMMERCIAL REAL ESTATE UNDERWRITING

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Back-of-the-napkin commercial real estate underwriting, in seconds.

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Value-Add Reposition

Buy it tired, renovate unit by unit, push rents, refinance or sell into the new income.

A value-add deal lives or dies on two numbers: what the renovation returns on the money you spend, and how fast you can turn the units. This model renovates unit by unit at a pace you set, charges downtime for every unit while it is out of service, and reports the return on renovation dollars — annual NOI lift divided by what you spent to get it. Under about 20% you are doing a great deal of work for a return you could have bought passively.

Statement of assumptions & returnsAll figures USD · annual unless noted · click any number to type it exactly

Levered IRR / Equity multiple

--

Cash flow by year, through the renovation and out the far side

Going in

Purchase price--
Price per unit--
Going-in cap on in-place rents--
Renovation budget--
Closing costs--
Lease-up commissions--
Exterior or systems work--
All-in basis--
Loan proceeds--
Loan fee--
Equity required--

Sources and uses

Deal metrics

Yield by year

Return on total cost as the deal stabilizes, against the cap rate you exit at

What the renovation buys

In-place NOI--
Stabilized NOI--
NOI lift--
Return on renovation dollars--
Months to stabilize--
Yield on cost--
Development spread over exit cap--
Value created--

Coming out

Exit value--
Net proceeds after sale costs and payoff--
Unlevered IRR--
Net present value--

Debt service coverage by year

Amortization schedule

Read the two together. Coverage tells you whether each year clears the lender’s floor; the schedule tells you what you still owe on the day you sell. An interest-only period flatters the first and does nothing for the second — the balance sits exactly where it started.

Return sensitivity

Levered IRR across achieved renovated rent and exit cap. Your case is outlined.

Scenario analysis

Each column is the whole model re-run, not an adjustment to the base case.

What moves the return most

Points of IRR between the low and high case for each driver, ranked

Where this deal breaks

Solved against your own discount rate. Everything else held at your assumptions.

Return on renovation dollars is the test that matters — annual NOI lift divided by what you spent to get it. Under about 20% you are doing a great deal of work for a return you could have bought passively, and every month a unit sits down is a month it earns nothing. The renovation pace slider is doing more damage to your IRR than the budget slider is.

Common questions

What return on renovation cost should I target?
Above 20% is where the disruption starts paying for itself. Below 15%, buying a stabilized asset at market is usually the better use of the same capital and attention.
Does renovation pace really matter that much?
Yes. Every month a unit sits down is a month it earns nothing, and the pace slider moves IRR more than the budget slider does on most deals.
How do I know the renovated rent is achievable?
Comparable renovated units in the same submarket, not the same building. If the only evidence is a broker’s pro forma, run the sensitivity grid down two rent levels and see whether the deal still works.
Cap Rate Loan Sizing Vacant Retail Box Value-Add Strip Plaza contact@5secondmodel.com New York, NY

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These are screening tools. They round, they assume, and they leave out capital expenditure, income tax, reserves and everything else that matters at the diligence stage. Directionally right is the goal — verify before you sign. Nothing here is investment, tax or legal advice. Every calculation runs in your browser; no data is sent anywhere. © 2026 5 Second Model · New York, NY.