How to Calculate the Value of a Multifamily Property in Los Angeles
A Guide to Multifamily Valuation
By: Jake Plewa Commercial Real Estate Sales & Valuation, Los Angeles
This is one of the most common questions I get, and it’s a good one. “I’ve had my building for 15 years — what’s it worth today?” The honest answer is: it depends on several factors that most owners aren’t tracking as closely as they should be. Understanding how your property is valued isn’t just an academic exercise — it’s the foundation for every major decision you’ll make: when to sell, when to refinance, when to hold, and how to negotiate. Let me walk you through exactly how I — and every serious buyer in the market — look at multifamily property values in Los Angeles.
The Income Approach: How Most Apartment Buildings Are Valued
Unlike single-family homes, which are largely valued by comparable sales (what your neighbor’s house sold for), apartment buildings are primarily valued based on their income. The more money the property generates, the more it’s worth. Simple in concept, nuanced in practice. There are two primary income-based methods to estimate the value of an apartment building I use.
Method 1: Capitalization Rate (Cap Rate)
The cap rate method is the most commonly used property valuation approach for multifamily properties in Los Angeles, especially buildings with 5 or more units.
The formula to estimate your property’s value:
Property Value = Net Operating Income (NOI) ÷ Cap Rate
Let’s define both of those:
Net Operating Income (NOI) = Your gross rental income, minus vacancy allowance, minus all operating expenses (property taxes, insurance, maintenance, property management, utilities you cover, etc.). NOI does not include mortgage payments — it’s a pre-debt number.
Cap Rate = The prevailing return rate that buyers in a given market are willing to accept for a particular type of property. Cap rates are set by the market, not by you.
Example: A 10-unit building in Koreatown collects $18,000/month in gross rents ($216,000/year). After accounting for 5% vacancy and $70,000 in annual operating expenses, the NOI is approximately $135,000.
If the current market cap rate for similar properties in that neighborhood is 4.5%, the value works out to:
$135,000 ÷ 0.045 = $3,000,000
With this formula to calculate the value of a multifamily property you can get a rough estimate of what your property is worth, but here’s the critical insight: cap rates are a moving target. They shift with interest rates, investor demand, neighborhood perception, and broader economic conditions. When cap rates compress (go lower), values rise — even if your income stays the same. When cap rates expand, values fall. Over the past decade, LA cap rates compressed dramatically as investor demand flooded the market. In the current higher interest rate environment, we’ve seen some softening, which is worth factoring into your timing.
Method 2: Gross Rent Multiplier (GRM)
The Gross Rent Multiplier is a quicker, rougher tool — think of it as a back-of-napkin check.
It’s calculated as:
GRM = Sale Price ÷ Gross Annual Rents
Or flipped:
Value = Gross Annual Rents × Market GRM
GRMs vary significantly by submarket. In high-demand areas like West LA, Silver Lake, or Los Feliz, GRMs can range from 15–20+. In the San Fernando Valley or South LA, they tend to run lower — sometimes 10–14 depending on the specific pocket.
The GRM is less precise because it doesn’t account for expenses, which vary property to property. But it’s useful for quickly benchmarking where a building sits relative to the market.
What Actually Affects the Value of your Los Angeles Apartment Building?
Beyond the math, here are the variables I evaluate when I walk a property:
Rent-to-Market Spread
If your in-place rents are 30% below current market rents, a value-add buyer sees significant upside through natural turnover. That potential often gets priced into the offer —sometimes favorably.
Unit Mix
Two-bedroom units drive higher rents and attract stronger demand than studios, generally. A building heavy on larger units often commands a premium. Physical Condition and Deferred Maintenance A building with a new roof, updated electrical, and renovated units will appraise and sell better than one with deferred maintenance. Buyers factor repair costs into their offers dollar-for-dollar.
Soft Story / Retrofit Compliance
In LA, soft-story seismic retrofit requirements have been phased in for older buildings. If your property has already been retrofitted, that’s a positive. If it hasn’t, buyers will discount for the estimated cost.
Parking and Lot Utility
Properties with ample parking or developable land (potential for ADUs, for example) often carry premium valuations, particularly as LA’s ADU laws have made it easier to add units on existing parcels.
Neighborhood Trajectory
I track submarkets closely. A building in a neighborhood with improving fundamentals — new retail, infrastructure investment, rising renter demand — will trade at a tighter cap rate than a comparable building in a flat or declining area.
What Your Building Is NOT Valued On
This surprises some owners: what you paid for it doesn’t matter. Neither does how much you owe on it, or what a neighbor told you they heard a similar building sold for years ago. The market is strictly forward-looking. Buyers are asking: “What income does this property generate, and what return do I need to justify this price?” Your basis and your loan balance are your financial realities, but they don’t move the market’s math.
Getting an Accurate Estimate of Your Property’s Value
I run valuations for apartment owners across Los Angeles regularly — some are ready to sell, some are just curious, and some are planning five years out. In my experience, most owners haven’t had a thorough market valuation in several years and are either sitting on more equity than they realize, or holding outdated assumptions about what their building is worth. An accurate valuation involves pulling recent comparable sales, analyzing in-place versus market rents, projecting stabilized NOI, and comparing current cap rate benchmarks by neighborhood. It’s not an internet-generated estimate of value — it’s a professional underwriting of your asset.
Curious what your building is worth in today’s market? Contact me for a complimentary, no-obligation valuation. I’ll give you a real number — not a range designed to get you to sign a listing agreement.
Jake Plewa jake@taksainvestment.com (310)922-6124
NOTE: The information provided on this website and this post is for general informational purposes only and is not intended as financial, tax, legal, or real estate advice. We are not licensed accountants, attorneys, estate planners, or real estate appraisers. All valuations, market analysis, and content are provided as educational information only. Any financial, tax, legal, or real estate decisions should be made in consultation with qualified professionals such as a licensed real estate appraiser, accountant, attorney, or financial advisor. Results and outcomes will vary based on individual circumstances.Keywords: Los Angeles apartment building valuation, how much is my apartment building worth, cap rate Los Angeles multifamily, NOI apartment building, gross rent multiplier LA, multifamily valuation Los Angeles, apartment building appraisal LA