Determine apartment building value by valuation methods
For multifamily investors valuing apartment buildings: GRM (gross rent multiplier), cap rate, and per-unit comparables.
Multifamily Valuation Calculator
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Create Free AccountWhat it does
The Multifamily Valuation Calculator determines apartment building value using multiple approaches — Gross Rent Multiplier, cap rate income approach, and per-unit comparables — to triangulate value and validate pricing reasonableness across methods.
Multifamily properties are valued using multiple methodologies because different buyer types prioritize different metrics. This calculator compares values across approaches so you understand which methodology is most reliable for your specific investment thesis.
Who it's for
- Multifamily investors validating property values across multiple valuation approaches
- Appraisers calculating multifamily values using multiple methodologies and reconciliation
- Brokers presenting market-supportable valuations to buyers and justifying asking prices
- REIT managers determining acquisition prices based on comparable multifamily valuations
How it works
Enter annual gross rent and research market multiples
GRM typical: 5–8x gross rent. Varies by market and property class.
Enter NOI and market cap rate
Calculate value: NOI ÷ cap rate.
Enter unit count and per-unit comp sales
Average price per unit across recent sales in market.
Why it matters
Calculate value using GRM (quick market-based approach)
Calculate value using cap rate (income approach)
Calculate value using per-unit comparables (sales approach)
Compare all three methods to triangulate fair value
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Enter a property address to pre-fill value, rent, and tax data automatically.
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Frequently asked questions
What is GRM?
Gross Rent Multiplier: annual gross rent × GRM = estimated value. Example: $1M rent × 6 GRM = $6M value. Fast but rough.
What GRM should I use?
Class A urban: 5–6x. Class B suburban: 6–7x. Class C or rural: 7–9x. Higher GRM = lower price, higher yield.
Should I use all three valuation methods?
Yes — if all three methods agree (within 5–10%), you have confidence in value. If wide variance, dig deeper into market fundamentals.
How do I reconcile different methods if they disagree?
Investigate: is GRM out of date? Is cap rate right? Are comps truly comparable? Weight most reliable method based on market depth.
Is this calculator free to use?
Yes — create a free Investor Starter account to run 1 calculator per day. No credit card required. Upgrade to Core ($49/mo) for unlimited access to all 67 calculators.
How accurate are the results?
Results are only as accurate as your inputs. The formulas use industry-standard real estate investment math. Always verify with a licensed professional before committing capital.
Related calculators
Multifamily Investment Calculator
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Open calculatorCommercial Property Value Calculator
Value commercial property using the income approach by dividing stabilized NOI by market cap rate.
Open calculatorGross Rent Multiplier (GRM) Calculator
Divide purchase price by annual gross rent for a fast pre-underwriting market comparison.
Open calculatorCommercial Cap Rate Calculator
Calculate cap rate for office, retail, industrial, or mixed-use properties to compare investment value.
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