Your Guide to an Apartment Building Valuation Calculator
Valuing an apartment building requires a different approach than valuing a single-family home. Instead of relying on comparable sales alone, apartment building value is primarily driven by the income it generates.
The Three Primary Valuation Methods
Income Capitalization Approach
The most widely used method for multifamily properties:
Value = NOI ÷ Cap Rate
Where NOI = Effective Gross Income - Operating Expenses
Gross Rent Multiplier (GRM)
Value = Annual Gross Rents × GRM
GRMs in Los Angeles typically range from 10–18 depending on submarket and property type.
Sales Comparison
Compare to recent sales of similar buildings in the same neighborhood, adjusting for differences in size, unit count, condition, and location.
Building a Simple Calculator
Here are the inputs needed for a basic apartment building valuation:
- Number of units and unit mix (studios, 1BR, 2BR)
- Current monthly rents per unit
- Vacancy rate (typically 3–5% in LA)
- Annual operating expenses (tax, insurance, management, maintenance)
- Market cap rate for the submarket
Plug these into: Value = (Gross Rents × 12 × (1 - Vacancy) - Annual Expenses) ÷ Cap Rate
Why Professional Valuations Matter
Automated calculators can't account for micro-location factors, below-market rents, deferred maintenance, RSO restrictions, or pending rent increases. A professional appraisal or broker opinion of value from Samimi CRE Advisors will give you the most accurate picture. Request a free valuation.