Start with collectible income under the existing leases. Model potential rent growth separately, with the time, cost, and legal conditions needed to achieve it. A projected market rent is not income the building earns today.
Build a defensible current-income baseline
Reconcile the rent roll with actual collections and concessions. Subtract a supported allowance for vacancy and credit loss, then normalize operating expenses such as taxes, insurance, utilities, management, and routine repairs. Keep debt service and major capital work separate from this NOI calculation.
Compare the resulting NOI with recent sales of buildings that have similar regulation, unit mix, and condition. The cap rate is an assumption to support with evidence, not a number chosen to reach a desired price.
Put a timeline around the rent gap
A tenanted apartment advertised at a lower rent cannot simply be underwritten at a nearby asking rent. Review the lease, applicable restrictions, and achievable rent before adding an increase to the model. In Santa Monica, the city offers a lookup for the maximum allowable rent of controlled units.
For a future scenario, state when income changes, what turnover or renovation costs apply, and how much income is lost during the transition. A stabilized indication reached years later should not be presented as today’s sale value.
What to bring to the pricing conversation
Use a range of cap rates and transition periods to see which assumptions drive the conclusion. Ask for the current-income case and the conditional future case side by side.
- Dated rent roll, leases, concessions, and collection history
- Trailing income and operating expenses
- Evidence supporting achievable rents and any planned increases
- Work estimates, vacancy assumptions, and a realistic timing schedule
Current income versus conditional stabilized income
Hypothetical 10-unit property. A 5.0% cap rate is used only to isolate the income effect. These figures are not Santa Monica market statistics or the underwriting for 1224 9th Street.
| Annual input | Current-income case | Conditional future case |
|---|---|---|
| Scheduled rent | $240,000 | $300,000 |
| Vacancy and credit loss (5%) | −$12,000 | −$15,000 |
| Operating expenses | −$96,000 | −$105,000 |
| NOI | $132,000 | $180,000 |
| NOI ÷ 5.0% | $2,640,000 | $3,600,000 |
The $960,000 difference is a difference between two income indications, not an immediate value gain. This simple capitalization example excludes transition costs, interim cash flow, and discounting. Add those before comparing present values.
Apply the analysis to your property
Cap Rate Calculator · Santa Monica market context · 1224 9th Street transaction
The linked transaction provides local context. The hypothetical example above does not describe that property’s finances, condition, or sale strategy.
Request a property pricing reviewSources and further reading
- Fannie Mae: DUS financial inputs and underwriting records
- City of Santa Monica: look up a controlled unit’s maximum allowable rent
General educational analysis. Confirm property-specific legal, tax, insurance, and financing assumptions with the appropriate professionals.