A good cap rate for a Los Angeles apartment building in 2026 depends entirely on where it sits. Santa Monica, Century City, and West LA trade in the 3.5% to 4.5% range. Koreatown and Hollywood trade in the 4.0% to 5.0% range. The San Fernando Valley blends at 5.0% to 6.0% or higher. The blended metro average is 5.6% as of Q1 2026.
But the number most brokers cite is not the number that matters.
Cap rates are not fixed. They are what buyers agree to pay for a given stream of income. A seller's listing cap rate is a marketing number. A broker's opinion-of-value cap rate is an estimate. The only cap rate that is real is the one printed on a closed sale in your submarket in the last ninety days.
When a buyer underwrites your building, they are not using the industry-range number. They are using their cost of capital, their assumed rent growth, their view on the rent control trajectory in your jurisdiction, and the specific risk profile of your building. In Q1 2026, that stack produces a range for the same building that can be 50 to 75 basis points wide depending on who is bidding.
Which means there is no "good" cap rate for your building in the abstract. There is a priceable cap rate, and it is narrower than the industry ranges suggest.
A cap rate is NOI divided by price. Low cap rate means high price relative to income. High cap rate means lower price relative to income. In a compressed market, cap rates go down because buyers are willing to pay more per dollar of income. In an expansion, they go up because buyers demand more income per dollar paid.
LA cap rates compressed hard between 2020 and 2022 — Koreatown traded in the low 4s. They expanded from 2023 through 2024 as interest rates climbed. They are stabilizing now, with a slight upward bias on RSO-constrained inventory because of the July 2026 rent formula change.
For a seller, this matters in one specific way: the cap rate the buyer applies to your building determines your sale price. A 50 basis point shift on a 20-unit Koreatown building with $280,000 in NOI is the difference between roughly $5.6 million and $6.2 million.
The cap rate buyers pay for a pre-1978 LA City building has been structurally diverging from the cap rate they pay for a post-1995 LA City building for three years, and the gap is still widening.
Pre-1978 inventory is RSO-constrained. Post-1995 is Costa-Hawkins exempt. In the same submarket, on the same block, a post-1995 fourplex and a 1965 fourplex are now trading at cap rates up to 75 basis points apart. This has not been true historically. It has become true over the last 36 months and the July 2026 RSO rewrite is accelerating it.
If you own pre-1978 inventory, the cap rate on your building is not what it was in 2021, and the number your broker cites from "industry averages" is disguising that divergence.
Four questions.
What comparable closed sale produced this cap rate? Sources, addresses, dates, cap rates. Not listings. Closed sales.
Is the cap rate on in-place income or pro forma? In-place is real. Pro forma is a story. If your broker is showing pro forma cap rates, you are in a negotiation where the story is doing the work.
What is the buyer pool for this cap rate? Every cap rate has a buyer. If the buyer pool for a 4.3% cap in Koreatown is three institutional funds and those three funds are on the sidelines this quarter, the 4.3% is theoretical.
How does the cap rate adjust for the July 2026 RSO change if this building is pre-1978 LA City? A broker who cannot answer this in 2026 is running old numbers.
A good cap rate for an LA apartment building is the cap rate that produces a sale price you can close at, not the one that looks good in a brochure. The difference between those two numbers is often the difference between a building that sits on the market for nine months and a building that closes in ninety days.
The cap rate is not the point. The buyer at that cap rate is the point.
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Related reading:
- How to Sell a Multifamily Property in Los Angeles (The Complete Guide)
- Selling Multifamily Property in Koreatown Los Angeles
- What the 2026 RSO Rewrite Actually Means for Your Apartment Building
Michael Sterman is Senior Managing Director Investments at Marcus & Millichap, specializing in Los Angeles multifamily transactions. $1.41 billion across 254 closed transactions.
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