Selling an apartment building covered by the Los Angeles Rent Stabilization Ordinance (RSO) is mostly about one thing: proving to a buyer exactly what income the building produces today, and what the rules let them do with it tomorrow.

Price follows the rent roll, transfer tax can take a five- or six-figure bite, and the buyer pool is made up almost entirely of investors who know the RSO well. This guide covers what those buyers look at, the rules that shape their numbers, and how to prepare.

Before you sign anything, it’s worth confirming whether the building’s RSO registration is actually current, since that status follows the property into the sale.

Table of Contents

Is your building RSO?

In the City of Los Angeles, the RSO generally covers rental units in buildings built on or before October 1, 1978. Look up the address on ZIMAS (zimas.lacity.org) and open the Housing tab. Most pre-1979 apartment buildings in the city are RSO.

Newer buildings usually fall under state law (AB 1482) and the city’s Just Cause Ordinance instead. If you own a house or small building rather than an apartment building, our guide to selling a tenant-occupied property in Los Angeles is the better starting point.

What a buyer inherits

Everything about the tenancies transfers at closing: leases, current rents, deposits, rent-increase history, and just-cause protection. A sale does not create a right to raise rents or remove anyone. So buyers underwrite three things: the income in place, the rules that cap its growth, and the realistic upside from turnover.

The rent cap

RSO rents can rise once every 12 months by the city’s allowable percentage. LAHD has set it at 3% for July 1, 2025 through June 30, 2026, and 3% again for July 1, 2026 through June 30, 2027.

An ordinance effective February 2, 2026 changed the formula going forward to 90% of the local CPI average, with a 1% floor and a 4% ceiling (the old range was 3% to 8%). The same ordinance ended the extra percentage owners could add for landlord-paid gas and electricity, and ended the 10% increase for an added dependent.

For more on how these caps affect smaller owners, see LA rent caps in 2026: should small landlords hold or sell.

Turnover upside

State law (Costa-Hawkins) lets an RSO unit’s rent reset to market when a tenant leaves voluntarily, or after a properly filed buyout. That is why buyers care about move-in dates.

A building where half the units turned over in the last five years has less upside than one where long-term tenants pay far below market, but it also carries less risk. Buyers will price the gap, the likelihood of turnover, and the cost of getting there through tenant buyouts.

RSO registration and fees

Every RSO unit must be registered with the Los Angeles Housing Department (LAHD) each year. The current RSO registration fee is $38.75 per unit, and the Systematic Code Enforcement Program (SCEP) fee is $67.94 per unit. Owners may pass half of each through to tenants as small monthly surcharges ($1.61 and $2.83).

The city also runs a rent registry for RSO units. Buyers and their lenders will ask for proof that registration is current, along with any open LAHD cases, code violations, or SCEP inspection results. Clean records shorten due diligence. Unpaid fees or open cases become price reductions or closing conditions.

Capital improvement pass-throughs

The RSO lets owners recover part of the cost of qualifying improvements through a temporary rent surcharge, approved by LAHD. Under the Capital Improvement Program:

The improvement must primarily benefit tenants, last five years or more, be permanently affixed, and not be routine maintenance. Examples include exterior painting, new windows, flooring, security items, and major appliances.
The owner files within 12 months of finishing the work, with invoices and proof of payment.
The formula splits the cost 50/50: total eligible cost times 50%, divided by 60 months, divided by the number of benefiting units.
The surcharge is capped at $55 per unit at any one time and is collected for up to 72 months, or until the approved amount is recovered.

LAHD’s own example: a $25,000 exterior paint job on a 24-unit building works out to $8.68 per unit per month. Buyers will list any active surcharges on the rent roll but usually value them modestly, since they expire. Separate LAHD programs cover rehabilitation work, primary renovations, and mandatory seismic retrofit costs, each with its own rules.

The Ellis Act: how it affects a sale

The Ellis Act is the state law that lets an owner leave the rental business by withdrawing units from the market. In Los Angeles, it comes with heavy process:

The owner files a Notice of Intent to Withdraw with LAHD after an appointment with an analyst, records a memorandum with the County Recorder, and serves tenants.
Tenants get at least 120 days’ notice. Tenants who are 62 or older or disabled, and have lived in the unit at least one year, can claim an extension to one year.
Relocation assistance is due within 15 days of the termination notice. For July 1, 2026 through June 30, 2027, LAHD’s amounts are $11,000 or $14,400 for eligible tenants and $23,150 or $27,400 for qualified tenants, depending on tenure and income.
The Ellis Act requires withdrawing all units in the building, not picking individual ones.
LAHD records constraints against the property that bind future owners, including limits and notice requirements if units are ever re-rented, plus annual status reports for seven years. Demolition projects add further state and city rules.

For most sellers, an Ellis withdrawal before a sale rarely makes sense: it is slow, expensive, and leaves restrictions a buyer must live with. Some buyers pursue it after closing for redevelopment, and they price that cost and time into their offer. Our Ellis Act guide covers the process in more detail.

Measure ULA and larger sales

The City of Los Angeles real property transfer tax has a base rate of $2.25 per $500 of value (0.45%). Measure ULA adds a second layer on higher-value transfers. As of July 1, 2026:

Sale price	ULA rate	Combined city rate
Over $5,400,000 and under $10,900,000	4%	4.45%
$10,900,000 or more	5.5%	5.95%

The ULA rate applies to the entire price, not just the amount over the threshold, and the thresholds adjust each July 1. That creates a cliff. On a $6,000,000 sale, the ULA portion is $240,000 and the base city tax is $27,000. A building that sells for exactly $5,400,000 pays no ULA at all.

Pricing near a threshold deserves real analysis, and so does any idea about restructuring the sale. Some owners ask whether selling the LLC instead of the property avoids ULA. Do not assume it does; get advice from a tax attorney before you plan around it. A 1031 exchange can defer capital gains, but it does not reduce the transfer tax.

What buyers will ask for

Have this ready before you go to market:

Current rent roll with move-in dates, rents, deposits, and last increase dates
All leases and amendments, and any surcharge approvals
Trailing 12 to 24 months of income and expenses, plus utility bills
LAHD registration, rent registry filings, and any open cases or citations
Soft-story or other retrofit compliance records, permits, and certificates of occupancy
Tenant estoppel certificates if the buyer or lender requests them

Your exit paths

List with a multifamily broker. Widest exposure and best price discovery. Takes longer, and lender-financed buyers will scrutinize every document.
Sell direct to a cash buyer. Faster and more certain, at some discount. A good fit for buildings with deferred maintenance, problem tenancies, or a hard deadline.
Sell and exchange. Use a 1031 exchange to trade into a different property or market. Strict deadlines and a qualified intermediary are required.

A short consult with a landlord-tenant attorney and a CPA before listing tends to pay for itself, especially near a ULA threshold. For the exact brackets and what counts as a qualifying sale, see Measure ULA’s transfer tax explained.

Other cities layer their own just-cause and relocation rules on top of the state floor too; our look at Antioch’s tenant eviction protection ordinance covers how one Contra Costa County city’s relocation payments compare with the statewide default.

Common questions

Can I raise rents to market before selling?

No. RSO rents can only rise by the annual allowable percentage, once every 12 months, plus any LAHD-approved surcharges. Rent resets to market only when a tenant leaves voluntarily or through a properly filed buyout.

Does a buyer have to keep my tenants?

Yes. Tenancies transfer with the building. A new owner can only end a tenancy for one of the legal reasons in the RSO, and no-fault reasons require relocation payments and LAHD filings.

Will an Ellis withdrawal raise my sale price?

Rarely. It costs relocation payments and months of notice, and it leaves recorded restrictions that bind the next owner. Most sellers do better selling occupied and letting the buyer price the building as it is.

See what your building would bring as-is

If you would rather skip a long marketing period, we either buy directly or bring a vetted cash buyer for RSO buildings with tenants in place, deferred maintenance and all. Learn more on our sell rental property in Los Angeles page, call (424) 435-2326, or request a no-obligation offer online.

Want to see what other California sellers say about working with us? Find Cash Home Buyers CA on Google for reviews, or call us at (424) 435-2326.

Selling an RSO Apartment Building in Los Angeles: Owner’s Guide