LA City's Rent Stabilization Ordinance was rewritten in late 2025 with effective date July 1, 2026. The rewrite was the most consequential change to LA rent control since the original 1979 ordinance. For owners of the roughly 624,000 rent-stabilized units in LA City — the largest concentration of rent-controlled multifamily in the United States — the rewrite changes the operating economics of the building, the trajectory of NOI growth, and the math that buyers use to underwrite acquisitions. For owners weighing whether to sell, the rewrite is one of the most important inputs to that decision in this cycle.
The full text of the rewrite and a detailed legislative breakdown live in the legislation tracker. This page focuses on what the rewrite specifically does to the economics of selling an LA RSO building — what buyers see, what they're pricing in, and what owners thinking about a 2026 or 2027 sale should know.
Three substantive changes affect seller-side economics directly.
Annual rent increase cap structure tightened. The rewrite revised the formula for the maximum allowable annual rent increase on RSO units. The pre-rewrite structure tied the annual cap to CPI with a defined ceiling. The post-rewrite structure tightens the ceiling and limits the surcharge categories (utility passthrough, capital improvement passthrough) that owners could previously use to recover specific costs above the base cap. Net effect on NOI: tighter ceiling on rent growth, fewer recovery mechanisms for cost growth.
Tenant buyout and Ellis Act provisions revised. The rewrite added administrative requirements and notice periods to both tenant buyout agreements and Ellis Act withdrawals. Net effect: the operational cost and timeline of voluntarily or involuntarily transitioning units out of RSO occupancy increased materially. Strategies that worked well under the pre-rewrite RSO structure require revisiting under the new structure.
Hardship adjustment process narrowed. The rewrite tightened the eligibility criteria for hardship rent adjustments (the mechanism through which owners can petition for rent increases above the base cap when they can demonstrate financial hardship). Net effect: the safety valve for owners whose costs outpace rent growth is meaningfully narrower than it was.
These three changes interact. The base cap is lower, the cost-recovery mechanisms are narrower, the unit-transition pathways are slower, and the hardship valve is tighter. The combined effect on an owner's operating math is more pressure on margins, not less.
Sophisticated buyers underwriting LA RSO acquisitions in mid-2026 have updated their models to reflect the rewrite. Specific changes I see across underwriting models:
Lower forward rent growth assumptions. Buyer pro forma rent growth assumptions on RSO inventory have compressed from prior-cycle ranges to lower ranges that reflect the tighter cap structure. The compression is most pronounced on the longer end of the holding period — five-year and ten-year cumulative rent growth assumptions are now materially lower than they were in 2023.
Higher operating expense growth assumptions. Because the surcharge mechanisms have narrowed, buyers underwrite higher direct operating expense exposure. The cost of utility increases, capital improvement work, and compliance is now mostly the owner's to absorb without offsetting rent recovery.
Wider underwriting risk margins on RSO inventory. Buyer underwriting includes a broader risk margin (capitalization rate or yield expectation) on RSO inventory compared to Costa-Hawkins exempt inventory. The differential between RSO and non-RSO building yields has widened.
Longer underwriting time horizons. Some buyers underwrite RSO acquisitions with longer holding periods than they would have used pre-rewrite, on the theory that compressed in-place cash flow has to recover over a longer compounding window to produce a satisfactory total return.
The combined effect is a meaningful price compression on RSO inventory compared to what the same buildings would have traded at pre-rewrite. The compression is not uniform across all RSO buildings — newer or better-positioned RSO inventory holds up better than older or compromised inventory — but the directional effect is consistent.
Three owner profiles face fundamentally different math after the rewrite.
The pre-1978 RSO owner with significant equity and tight cash flow. This is the owner most directly hit by the rewrite. The building's already-compressed in-place economics get tighter under the new cap structure. The hardship valve is narrower. The Ellis Act and buyout pathways are slower and more expensive. For this owner, the 2026 transaction environment is materially more favorable than the 2027 or 2028 environment will be, assuming current trajectories hold. Many owners in this profile are accelerating their sale decisions in response.
The pre-1978 RSO owner with substantial cash reserves and operational capacity. This owner has more options. The continued holding case is the longer compounding window with the eventual step-up basis benefit. The selling case is the same as for the equity-rich tight-cash-flow owner — locking current value before further compression. The decision is finely balanced and depends on the owner's specific financial position and long-term goals.
The owner of post-1995 Costa-Hawkins exempt inventory. Largely unaffected by the rewrite directly. The Costa-Hawkins exemption preserves the building's rent reset on vacancy and limits AB 1482 to its statutory cap structure (5% plus CPI with 10% ceiling). For this owner, the rewrite is a neighbor's problem, not their problem. The relative position of post-1995 inventory versus pre-1978 inventory has widened, which on the margin is favorable for post-1995 sellers if buyers are reallocating away from pre-1978 inventory.
The rewrite is not the only force shaping LA multifamily transactions in 2026. It interacts with three other major dynamics.
The insurance environment. Older RSO inventory is the same risk class that the insurance market has been repricing. The combination of tighter rent caps and rising insurance costs compresses owner NOI from both sides simultaneously. Buyers underwriting RSO inventory now factor both pressures concurrently.
Interest rates and financing. RSO inventory has weaker NOI growth potential than non-RSO inventory, which means it supports less debt at any given rate environment. Buyer underwriting reflects this directly through more conservative debt assumptions.
Compliance and regulatory pipeline. SB 721 balcony inspections, soft-story retrofit final compliance deadlines for some building categories, and various LAHD enforcement actions on older inventory continue to compound. The rewrite is one element in a regulatory landscape that has tightened consistently for older RSO buildings.
The cumulative effect on the price an RSO building trades for in 2026 is the sum of all these pressures. The rewrite is the most recent and most visible change, but it is not in isolation. A buyer underwriting today is pricing the rewrite plus the insurance environment plus the regulatory pipeline plus the financing environment — all simultaneously, all directionally negative for older RSO inventory.
Three pre-listing actions specifically address the rewrite-driven economic compression.
Update the rent roll and operating statement to reflect post-rewrite reality. Buyers underwrite against documented current performance. A seller whose rent roll shows pre-rewrite assumption increases that won't be sustained going forward presents a building whose forward economics the buyer will discount. A clean post-rewrite rent roll, with documented compliance with the new cap structure, supports a stronger valuation.
Complete or document the position on any pending hardship adjustments or Ellis Act filings. A building in process on a regulatory action becomes a building with uncertain future status from the buyer's perspective. Either complete the action before listing or document the status with full transparency. Uncertainty hurts more than completed-but-unfavorable status.
Position the building's structural advantages within the new framework. Costa-Hawkins exempt status. AB 1482 protection only (not RSO). Newer construction. Recently completed compliance items. Each of these is a structural advantage that buyers value more after the rewrite than before. Highlighting the building's correct asset class is part of the marketing strategy.
The rewrite is one of those market-wide structural changes that produces winners and losers among owners based on building profile. Pre-1978 RSO owners with margin pressure are the losers. Post-1995 Costa-Hawkins exempt owners are the relative winners. Owners with substantial equity in compressed-margin buildings face the strongest case to sell in 2026 — locking current value before further compression — that they have faced in a decade.
The other thing I tell sellers is to not over-react to the rewrite as a single event. The rewrite codified pressures that were already present in the market. The buildings most affected were already facing margin pressure from rent caps, insurance, and compliance costs that existed before the rewrite. The rewrite tightened the constraints; it didn't create them. The underlying economics of older RSO inventory had been deteriorating for years. The rewrite is the latest formalization of that trajectory.
The post-2026 RSO rewrite changed the math on LA RSO inventory. Some changes are immediate and direct (the cap, the surcharges, the hardship process). Other changes are second-order — what buyers underwrite, what lenders finance, what the trajectory of values looks like. Sellers responding well to the rewrite are the ones whose decisions reflect the actual current math, not the pre-rewrite math. The market has updated. The seller whose mental model hasn't is the seller pricing against an obsolete reference point.
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What changed in the 2026 LA RSO rewrite?
Three substantive changes affect seller economics: the annual rent increase cap structure was tightened, the surcharge categories owners could use to recover specific costs were narrowed, and the hardship adjustment process was made more restrictive. The Ellis Act and tenant buyout pathways also had administrative requirements added.
Does the RSO rewrite affect my building's value?
For pre-1978 RSO buildings, yes — buyer underwriting now reflects lower forward rent growth and higher unrecoverable operating expense growth, which lowers valuations. Costa-Hawkins exempt buildings (typically post-1978 multifamily and post-1995 single-family/condo construction) are largely unaffected directly but may benefit relatively as buyers reallocate.
Should I sell my RSO apartment building before further rule changes?
Depends on building profile and owner objectives. For pre-1978 RSO owners with tight margins and significant equity, the 2026 transaction environment is materially more favorable than further-future environments at current trajectory. For Costa-Hawkins exempt owners, the rewrite is not a primary driver of timing decisions.
Did the RSO rewrite affect Ellis Act use in LA?
Yes, modestly. The rewrite added administrative requirements and notice periods to Ellis Act withdrawals, increasing the operational cost and timeline. The Ellis Act remains a viable strategy for owners exiting RSO inventory but is operationally more expensive than it was pre-rewrite.
Are post-1995 LA apartment buildings affected by the RSO rewrite?
Most post-1995 multifamily inventory in LA is Costa-Hawkins exempt and not subject to RSO base rent caps on vacancy. AB 1482 (the statewide cap) applies but is separate from RSO. The rewrite changes RSO directly; it does not change Costa-Hawkins or AB 1482 directly. Post-1995 Costa-Hawkins exempt buildings are not directly affected by the rewrite.
Michael Sterman is Senior Managing Director Investments at Marcus & Millichap, specializing in Los Angeles multifamily transactions.
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