Altadena Multifamily · Unincorporated Los Angeles County
Altadena sits outside the City of Los Angeles, and that one fact shapes almost every decision an apartment owner makes here: County rent rules instead of LARSO, County rebuild permits instead of LADBS, and no Measure ULA if a property ever changes hands. Since the January 2025 Eaton fire, owners have also had to work through remediation duties, the new SB 610 disaster rules, like-for-like rebuild standards and property tax relief. This page lays out where each of those stands today, whether you own an intact fourplex, a damaged garden building or a cleared lot, and whether you plan to rebuild, hold or eventually sell. The Group CRE has closed more than $488 million in Los Angeles multifamily transactions.
Get Your Free Valuation$488M+
Closed Transactions
No ULA
Measure ULA Does Not Apply
$1.10
County Transfer Tax per $1,000
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No Obligation
Altadena is an unincorporated community of Los Angeles County at the foot of the San Gabriel Mountains, directly north of Pasadena. With no city government, the County is the rent regulator, the transfer tax collector at closing and the permitting authority for every repair or rebuild.
The Eaton fire started on January 7, 2025, near Altadena Drive and Midwick Drive. By the time it was contained on January 31, it had burned 14,021 acres, destroyed 9,419 structures and damaged 1,076 more, according to CAL FIRE, and 19 people died. The Governor declared a state of emergency on January 7, and a federal major disaster declaration followed.
For apartment owners, the fire split the local market into three kinds of property: buildings that came through intact, buildings that are damaged but standing, and cleared lots. Each one trades to a different buyer on different math, and a comparable sale in one group says little about the other two.
That is why this page does not publish an Altadena cap rate or price-per-unit range. With intact buildings, damaged buildings and lots all in the recent sales record, any single blended figure would mislead you. We price each building from its own rent roll, its remediation status and the closest true comparables, and we show you the work. Our guide to how LA apartment buildings are valued explains the methods.
Measure ULA is a City of Los Angeles transfer tax. Unincorporated Altadena is outside the City, so an Altadena apartment sale pays no ULA at any price. The only documentary transfer tax is the County's, at $1.10 per $1,000 of value.
Here is what that is worth on a $6,000,000 sale. In Altadena the County tax is $6,600. The same sale inside the City of Los Angeles owes the same $6,600, plus the City's 0.45% base tax ($27,000), plus ULA at 4% of the full price ($240,000), for a total of $273,600. For City sales closing from July 1, 2026, ULA applies at 4% above $5.4 million and 5.5% at or above $10.9 million, as covered in our Measure ULA guide for sellers.
Confirm the parcel's jurisdiction before you underwrite. A mailing address is not a jurisdiction, so check the parcel itself with the County.
Altadena rentals fall under Los Angeles County's Rent Stabilization and Tenant Protections Ordinance, administered by the Department of Consumer and Business Affairs (DCBA), not the City's Rent Stabilization Ordinance. The two are constantly confused, and they carry different coverage rules and different annual numbers. We compare them side by side in LA City vs. LA County rent increase rules.
Under the County ordinance, a unit is fully covered, with both rent limits and just cause protections, when it sits on a property with two or more rental units and the first certificate of occupancy was issued on or before February 1, 1995. Most other rentals in unincorporated areas get just cause protection only. DCBA publishes the allowable annual increase, so confirm the current figure in writing before you serve a notice.
Units outside the County's rent limits may still be capped by state law. AB 1482 limits increases on most rental housing more than 15 years old to 5% plus CPI, with a 10% ceiling. For the Los Angeles metro, that works out to 8.7% for August 1, 2026 through July 31, 2027.
One more layer applies whenever an emergency declaration is active. While a declared state of emergency covers the area, Penal Code section 396 generally bars raising rent more than 10% for existing or prospective tenants, which reaches the asking rent on a vacant unit. Check for an active declaration before you set a rent. Our SB 1365 briefing explains the emergency rent rules and what changes on January 1, 2027.
SB 610 (Chapter 547, Statutes of 2025) took effect January 1, 2026. It added Civil Code sections 1941.8 and 1941.9, which set landlord duties after any disaster for which the President or the Governor declares a state of emergency. The duties reach owners of damaged buildings that are still standing, not only total losses.
How the statute treats the Eaton fire itself is less settled. The fire carried both state and federal emergency declarations, but it began a year before SB 610 took effect, and the statute does not say how it applies to damage, evacuations or tenancies that predate January 1, 2026. Treat remediation status and returning-tenant rights on any Eaton-affected building as diligence questions for counsel, not assumptions. A future declared disaster in Altadena, such as a storm-driven debris flow in the burn area, would fall squarely under the statute. Full detail is in our SB 610 briefing, and the table below summarizes what the statute requires.
Duty | What the statute requires |
|---|---|
Remediation | Remove debris and mitigate mold, smoke, smoke residue, smoke odor, ash, asbestos or water damage to applicable government cleaning standards, within a reasonable time. |
Debris presumption | Disaster debris at a unit is presumed to make it untenantable until a local public health agency or official determines toxic substances are not present. |
Right to return | Unless the tenancy was lawfully terminated, the tenant may return as soon as it is safe and practicable, at the rent in effect immediately before the disaster. |
Evacuation rent | No rent is owed while a mandatory evacuation order keeps the tenant out. Rent already paid comes back within 10 calendar days after the order lifts, or the tenant may deduct it from the next month. |
Destroyed units | When a tenancy ends because the unit was destroyed, advance rent for the period after termination is returned within 21 days. |
Notice and reports | Written notice to tenants when remediation is complete, plus tenant access to environmental testing reports. |
Rebuilding | Not required. The statute requires remediation, not reconstruction. |
There is no single right answer for a fire-affected Altadena building. Most owners start with whether and how to rebuild, and some also weigh a sale of the building or the land. Each path runs on different rules and different math.
Rebuild and re-lease. Los Angeles County lets a like-for-like rebuild in the Eaton fire area grow floor area, size, height or footprint by up to 10% or 200 square feet, whichever is greater. Like-for-like projects do not have to meet the current Zoning Code but must meet current building, fire and health codes, and applications are reviewed by County Planning, Building and Safety, Fire and Public Health. Building permits issue only after the site is cleared. Larger or different rebuilds follow the Altadena Community Standards District. Every unit you lease after a rebuild is a new lease under AB 628, so each one needs a working stove and refrigerator.
Sell the damaged building. A buyer will price the remediation status, the rent roll and which tenants may return. Documentation is what keeps that pricing from turning into a retrade late in escrow.
Sell the land. A cleared lot sells to someone underwriting their own project, so zoning, the rebuild allowance and site clearance status matter more than the old rent roll.
Insurance proceeds on a destroyed building can be deferred as an involuntary conversion under Internal Revenue Code section 1033. For investment real property lost to a casualty, the replacement period generally ends two years after the close of the first tax year in which any part of the gain is realized. That is a different clock from a 1031 exchange, which applies when you sell, so work through both with your CPA before you decide which path to take.
On the property tax side, California lets the Assessor lower a damaged property's assessed value under Revenue and Taxation Code section 170 (the claim is normally due within 12 months of the damage) and restores the prior base-year value when the building is rebuilt in a like or similar manner. Section 69 lets an owner whose property was more than 50% damaged in a Governor-declared disaster transfer the base-year value to a comparable replacement property in the same county within five years. Section 69 is not limited to homes, so it can matter on a rental.
The remediation scope and completion notice, any public health determination on debris, the environmental testing reports, the County permit status, a rent roll that flags displaced tenants and their return status, and a trailing twelve months that separates fire-period disruption from ordinary operations. Our due diligence checklist shows what a buyer's team will request, and our landlord insurance guide covers wildfire coverage and the FAIR Plan.
Both January 2025 fires started on the same day, but they burned through different jurisdictions. Pacific Palisades is inside the City of Los Angeles; Altadena is not. That difference changes the rules for rebuilding, renting and any future sale, often by real money.
| Metric | Altadena | Pacific Palisades |
|---|---|---|
| Jurisdiction | Unincorporated LA County | City of Los Angeles |
| Measure ULA at sale | Does not apply | 4% above $5.4M; 5.5% at or above $10.9M (from 7/1/2026) |
| Other transfer tax | County: $1.10 per $1,000 | County $1.10 per $1,000 plus City 0.45% |
| Rent stabilization | County RSTPO: 2+ units, first certificate of occupancy on or before 2/1/1995 | LA RSO: built on or before 10/1/1978 |
| Annual increase | Set by DCBA; confirm before notice | 3% for 7/1/2025 to 6/30/2027 per LAHD; confirm before notice |
| Fire (CAL FIRE) | Eaton: 14,021 acres; 9,419 structures destroyed | Palisades: 23,448 acres; 6,845 structures destroyed |
| Like-for-like rebuild | Up to 10% or 200 sq ft larger, whichever is greater | Up to 110% of original floor area, height and bulk |
| Rebuild permits | LA County (Planning, Building and Safety, Fire, Public Health) | LADBS |
| Unsolicited offers | Barred in ZIP 91001 under AB 851 until it repeals 1/1/2027 | Barred in ZIP 90272 under AB 851 until it repeals 1/1/2027 |
| Pending ballot item | None on ULA (ULA does not apply) | Measure TE, November 3, 2026 |
Sources: CAL FIRE incident pages for the Eaton and Palisades fires; City of Los Angeles Office of Finance (Measure ULA); LAHD; LA County Department of Consumer and Business Affairs; LA County Recovers like-for-like rebuild guidance; City of Los Angeles Emergency Executive Order No. 1; AB 851 (Chapter 535, Statutes of 2025). Figures checked October 2026; confirm before relying on them.
Transaction cost. On any sale above $5.4 million, the absence of ULA is the largest line-item difference at closing. On the $6,000,000 example above, Altadena saves $267,000 in transfer taxes.
Rebuild allowance. The County measures like-for-like in Altadena as 10% or 200 square feet, whichever is greater. The City's order for the Palisades allows up to 110% of the original floor area, height and bulk, so the two rebuild envelopes are not interchangeable.
Rent rules. Altadena's County ordinance reaches properties with a first certificate of occupancy through February 1, 1995. The City's RSO stops at buildings built on or before October 1, 1978, so a 1980s Altadena building can be rent-stabilized when a Palisades building of the same age is not.
Ballot timing. Palisades owners are watching Measure TE, a proposed one-time ULA exemption for residential properties damaged or destroyed in the Palisades Fire, on the November 3, 2026 ballot. Altadena owners have no comparable question pending because ULA never applied.
The Bottom Line
In Altadena the rent rules reach further, with County rent stabilization on buildings up to 1995, and the transfer tax stays small because ULA never applies. The Palisades has ULA on most apartment sales but a larger rebuild envelope. Which path fits depends on your building and your plans, and we are happy to run the numbers with you.
Whether you rebuild, hold or sell, decisions in Altadena right now turn on documents: the remediation record, the County rent status of each unit and a clean trailing twelve months. Getting them in order early keeps every option open and protects value whichever way you go.
The Group CRE sells Los Angeles apartment buildings and nothing else. We have closed more than $488 million in multifamily transactions with a 97.6% list-to-sale ratio and an average of 47 days to close, and owners have left us 55+ five-star reviews. We will tell you whether rebuilding, selling as is or selling the land clears more for you, and why. See our Los Angeles multifamily hub for every submarket we cover.
Taylor Avakian will walk you through your building's current value, the County rent rules, your rebuild options and what the numbers look like for each path. No obligation and no pressure to sell.
Request Your Free Property ValuationNo. Measure ULA is a City of Los Angeles transfer tax, and Altadena is unincorporated Los Angeles County. An Altadena sale pays only the County documentary transfer tax of $1.10 per $1,000, or $6,600 on a $6,000,000 sale. The same sale inside the City of Los Angeles would owe $273,600 once the City's 0.45% base tax and the 4% ULA rate are added.
Los Angeles County's Rent Stabilization and Tenant Protections Ordinance, administered by DCBA, not the City of Los Angeles RSO. Units on properties with two or more rental units and a first certificate of occupancy issued on or before February 1, 1995 are fully covered by rent limits and just cause rules. Most other rentals get just cause protection, and AB 1482 may cap their increases. Confirm the current allowable increase with DCBA before serving notice.
SB 610 took effect January 1, 2026 and applies to disasters with a Presidential or Governor's emergency declaration, which the Eaton fire had. The statute does not say how it treats damage, evacuations or tenancies from before its effective date, so get counsel's view on any Eaton-affected building. It applies directly to any future declared disaster in Altadena.
Not automatically. If a tenancy survived the fire, the lease and any County rent-stabilized rent continue, and a returning tenant keeps that rent. If the unit was destroyed, the tenancy generally ended by law, and a new lease is set under the County ordinance or AB 1482 where they apply, and under Penal Code section 396 while an emergency declaration is active. Ask DCBA whether a rebuilt building keeps its County coverage.
No. SB 610 requires a landlord to remediate disaster damage, including debris, smoke, ash, asbestos and water damage, but it expressly does not require rebuilding. Rebuilding is your choice; you can also sell the damaged building as is or sell the cleared land.
Los Angeles County lets a like-for-like rebuild in the Eaton fire area grow floor area, size, height or footprint by up to 10% or 200 square feet, whichever is greater. Like-for-like projects do not have to meet the current Zoning Code but must meet current building, fire and health codes. Larger or different rebuilds follow the Altadena Community Standards District.
Not legally in ZIP code 91001 for now. AB 851 (Chapter 535, Statutes of 2025) bars unsolicited offers to buy residential real property in listed fire-area ZIP codes, including 91001, until the law repeals on January 1, 2027. An offer is not unsolicited once you publicly signal a willingness to sell, such as an MLS listing or a for-sale sign.
Three California rules can apply. Revenue and Taxation Code section 170 lowers the assessed value of damaged property, with the claim normally due within 12 months of the damage. The prior base-year value is restored when you rebuild in a like or similar manner. Section 69 lets an owner whose property was more than 50% damaged in a Governor-declared disaster transfer the base-year value to a comparable replacement in Los Angeles County within five years, and it is not limited to homes.
The remediation scope and completion notice, any public health determination on debris, environmental testing reports, County permit status, a rent roll that flags displaced tenants and their return status, the County rent-stabilization status of each unit, and a trailing twelve months that separates fire-period disruption from normal operations.
Explore More Markets
Almost every submarket we cover sits inside the City of Los Angeles, where Measure ULA and the City's RSO apply. These pages show how the same building would be taxed and regulated on the other side of the line.
General information for property owners, not legal or tax advice. Statutes, ordinances and figures are summarized as of October 2026; confirm how they apply to your property with counsel and your CPA.
