Investor Guide · Financial Basics

LA Multifamily Financial Basics: Cap Rates, Cash Flow & ROI

Four numbers decide whether an LA apartment building is a good deal: the cap rate, the gross rent multiplier (GRM), cash-on-cash return, and total ROI. Master these four and you can underwrite any Los Angeles multifamily deal in minutes, and spot an overpriced one just as fast.

$488M+

Multifamily Closed

97.6%

List-to-Sale Ratio

47 Days

Avg. Time to Close

The Fundamentals

The four numbers that decide every LA deal

Cap Rate

The unleveraged yield: NOI ÷ price. Your starting point for value.

GRM

Price ÷ gross annual rent. A 10-second price sanity check.

Cash-on-Cash

Pre-tax cash flow ÷ cash invested. What your down payment earns.

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Total ROI

Cash flow + loan paydown + appreciation + tax benefits.

Metric 01 · Cap Rate

The cap rate: your starting point

The capitalization rate is the property's annual net operating income (NOI) divided by its price: the return you'd earn in year one if you paid all cash.

Cap Rate = Net Operating Income ÷ Purchase Price

Example: $123,500 NOI ÷ $2,500,000 price = a 4.9% cap rate

What's a good cap rate in Los Angeles in 2026?

For stabilized, mid-tier LA apartment buildings, cap rates are running roughly 4.5%–5.6% in early 2026, with prime Westside assets toward the low end and higher-yield submarkets toward the high end.

Prime Westside

4.25%

Mid-City / K-Town

4.75%

Downtown LA

5.0%

San Fernando Valley

5.25%

South LA / Long Beach

5.5%

Illustrative stabilized cap-rate ranges by submarket, early 2026. Confirm current figures with The Group CRE.

Lower cap = higher price (lower yield). Higher cap = lower price (higher yield, usually more risk or work). Don't chase the highest cap rate; chase the best risk-adjusted one.

Metric 02 · GRM

Gross Rent Multiplier: the 10-second sniff test

GRM = Purchase Price ÷ Gross Annual Scheduled Rent

A $2.5M building collecting $200,000/yr in rent has a GRM of 12.5

In LA, GRMs typically run 12–16 depending on submarket and rent upside. Use GRM to quickly screen a price, then confirm with cap rate and cash flow; it ignores expenses and vacancy, so screen with it and decide with the others.

Metric 03 · Cash Flow

Cash flow & cash-on-cash: what your money earns

Cap rate assumes all cash; almost no one buys all cash. Once you add a loan, what matters is cash flow (NOI minus annual debt service) and cash-on-cash return.

Cash-on-Cash = Annual Pre-Tax Cash Flow ÷ Total Cash Invested

Purchase price

$2,500,000

Net operating income (NOI)

$123,500

Loan (65% LTV, ~6% / 30-yr)

$1,625,000

Annual debt service

≈ $116,900

Down payment (cash in)

$875,000

Pre-tax cash flow (NOI minus debt service)

≈ $6,600

Cash-on-cash return

≈ 0.8%

Illustrative example, round numbers, ~6% rate assumption, for teaching.

That thin first-year return is the defining feature of today's LA market. When cap rates (~5%) sit near or below borrowing costs (~6%+), you get negative leverage: debt drags your initial return below the all-cash yield. Experienced LA investors accept it deliberately, betting on rent growth, value-add upside, and long-term appreciation.

Metric 04 · ROI

ROI: the full return picture

Cash-on-cash only counts cash in your pocket. Your real return on an LA apartment building comes from four sources stacked together:

Cash flow

The rents left after operating expenses and debt service.

Principal paydown

Every mortgage payment builds equity, roughly $20,000 in year one alone on the example loan.

Appreciation

LA's supply constraint has historically driven values up. Even 3% on a $2.5M asset is $75,000 a year.

Tax benefits

Depreciation shelters much of your cash flow, and a 1031 exchange defers capital gains when you trade up.

Add them up and a deal that looked like a 0.8% cash-on-cash return can pencil to a double-digit total return. For multi-year holds, sophisticated buyers model the internal rate of return (IRR). The lesson: in LA, never judge a deal on cash flow alone; the wealth is built in the equity.

LA Context · Rent Control

How rent control changes the LA math

This is where LA underwriting diverges from everywhere else. Two regimes cap how fast your income, and therefore your NOI and value, can grow:

RSO

LA City Rent Stabilization

Buildings with a certificate of occupancy before Oct. 1, 1978. A new, reduced formula takes effect July 1, 2026: 90% of CPI with a 1% floor and 4% ceiling (down from 3%–8%).

California AB 1482

Most other buildings 15+ years old. Caps annual increases at 5% + CPI, max 10%, currently 8.7% for the LA area.

The practical effect: a building with rents far below market can't be raised to market overnight; you capture upside slowly through allowed increases, at turnover, and through value-add. That's why two LA buildings with identical cap rates can be worth very different amounts. See our LA rent increase rules guide.

For Owners & Sellers

These same numbers set your building's value

Your building isn't priced on what you paid; it's priced on its NOI and the prevailing cap rate.

Property Value = Net Operating Income ÷ Cap Rate

At a 5% cap, every $1 of added NOI creates about $20 of value. Capture $15,000 of rent upside or trim $15,000 of expenses and you've added roughly $300,000 in value.

Get a free property valuation →

FAQ

Frequently asked questions

What is a good cap rate for multifamily in Los Angeles?

In early 2026, stabilized LA apartment buildings are trading around 4.5%–5.6%, with prime Westside assets at the low end and higher-yield submarkets at the high end. A good cap rate is fair for the submarket and leaves room for rent or value-add upside, not simply the highest number.

How do you calculate the cap rate on an apartment building?

Divide annual net operating income (all income minus operating expenses, before the mortgage) by the purchase price. A building with $123,500 of NOI priced at $2,500,000 has a 4.9% cap rate.

What's the difference between cap rate and cash-on-cash return?

Cap rate is the unleveraged year-one yield as if you paid all cash. Cash-on-cash return factors in your loan and measures pre-tax cash flow divided by the cash you invested. With financing, the two can diverge significantly.

Why are LA cap rates so low?

Investors pay a premium for Los Angeles's supply constraints, long-term rent growth, and durable demand. Low cap rates reflect low perceived risk and high appreciation potential.

What is negative leverage?

It's when your loan's interest rate is higher than the property's cap rate, so borrowing lowers your initial cash-on-cash return. It's common in LA and usually accepted in exchange for rent growth, value-add upside, or appreciation.

What is a good GRM in Los Angeles?

Gross rent multipliers in LA typically run 12–16 depending on submarket and rent upside. Use GRM to quickly screen a price, then confirm with cap rate and cash flow.

Does rent control affect my returns in LA?

Yes. LA City RSO and California AB 1482 cap how fast you can raise rents, limiting NOI growth, which is priced into value. Two buildings with the same cap rate can be worth different amounts depending on rent upside and which rules apply.

How do I know what my LA apartment building is worth?

Value is your net operating income divided by the prevailing cap rate, adjusted for rent upside, condition, and location. The most accurate way is a broker valuation grounded in recent submarket comps.

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About the Author

Taylor Avakian

Multifamily Investment Broker · CA DRE Lic. #02060040. A Los Angeles multifamily specialist with $488M+ closed, a 97.6% list-to-sale ratio, and a 47-day average close.

Meet the team · No Vacancy podcast · taylor@lyonstahl.com

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This content is for informational purposes only and does not constitute legal, tax, insurance, or financial advice, nor does it create a broker-client or fiduciary relationship. Laws and regulations change frequently. Information is deemed reliable but not guaranteed and is subject to change without notice. Consult a qualified attorney, licensed investment professional, and/or tax advisor for guidance specific to your property and situation. Market figures cited are illustrative and current as of 2026 and subject to change.