Can I Sell My ADU Separately in Los Angeles Under AB 1033?
For the first time in LA County history, homeowners can sell their ADU as a standalone unit. Here is exactly how AB 1033 works, what it costs, and who qualifies.
This is the biggest change to ADU ownership in California since the state first streamlined ADU permitting in 2017. Until now, your ADU was stuck on your property. You could rent it out. You could house a family member. But you could not sell it to someone else without selling your entire property along with it.
AB 1033 changes that equation completely. Governor Newsom signed the bill in October 2023, and it gives cities and counties the authority to adopt local ordinances allowing ADU owners to split their property into separate condominium units. LA County has officially adopted its ordinance, making this a reality starting April 4, 2026.
I have been tracking this legislation since it was introduced because it represents a genuine first-mover opportunity for LA homeowners who built ADUs. If you own a properly permitted ADU in unincorporated LA County, you now have the option to sell it independently, creating a new homeownership unit and cashing in on your investment.
Own an ADU in LA County? Let us assess whether your unit qualifies for separate sale under AB 1033.
💬 Text Us Your AddressWe will review your ADU's eligibility and walk you through the process.
- What Is AB 1033 and Why It Matters
- LA County Adoption: April 4, 2026
- How It Works: The Condo Conversion Process
- Requirements for Selling Your ADU Separately
- Costs: What to Expect in Soft Costs
- Who This Is For (and Who It Is Not For)
- Step-by-Step: Converting Your ADU for Sale
- Cities That Have and Have Not Adopted
- Impact on Property Values and Tax Implications
- The Mortgage and Lender Challenge
- Frequently Asked Questions
What Is AB 1033 and Why It Matters for LA Homeowners
Assembly Bill 1033 was authored by Assemblymember Phil Ting and signed into law by Governor Gavin Newsom on October 11, 2023. The law amends California's ADU statutes to allow local jurisdictions to adopt ordinances permitting homeowners to sell their ADU as a separate condominium unit, completely independent from the primary residence.
Before AB 1033, California law treated ADUs as accessory structures permanently attached to the primary parcel. You could build one, rent it out, and use it as you wished, but the ADU and the main house shared a single title. If you wanted to sell the ADU, you had to sell the entire property. This was a significant barrier for homeowners who invested $150,000 to $400,000 building an ADU and wanted to recoup that investment without leaving their home.
AB 1033 does not automatically apply statewide. It gives each city and county the option to adopt its own ordinance. This means some jurisdictions will move quickly while others may never adopt. For LA County homeowners, the timeline is now set.
Traditional condo conversion in California applies to multi-unit rental buildings and is subject to strict tenant protection laws, lottery systems, and conversion caps. AB 1033 creates a separate, streamlined path specifically for ADUs on single-family lots. It bypasses many of the traditional condo conversion restrictions because the ADU is an accessory unit, not a standalone rental building.
Want to understand how AB 1033 applies to your specific property? We break it down for free.
💬 Text "AB 1033" to (213) 262-5092LA County Adoption: Effective April 4, 2026
The Los Angeles County Board of Supervisors voted to adopt an AB 1033 ordinance, making unincorporated LA County one of the first major jurisdictions in Southern California to allow separate ADU sales. The ordinance takes effect on April 4, 2026.
This is significant because unincorporated LA County covers a massive geographic area including communities like Altadena, East Los Angeles, Hacienda Heights, Rowland Heights, Walnut, La Crescenta, and dozens more. If your property falls within unincorporated county territory (rather than within city limits of an incorporated city), this ordinance applies to you.
The LA County ordinance applies to unincorporated areas only. If you live within the city limits of Los Angeles, Pasadena, Glendale, Alhambra, or any other incorporated city, that city must adopt its own separate AB 1033 ordinance. Check with your city planning department to confirm your jurisdiction status and whether your city has adopted or is considering adoption.
Thinking About Buying a Home With an ADU?
🏡 Browse LA Homes With ADU Potential →How It Works: The Condo Conversion Process
Selling your ADU separately is not as simple as listing it on the MLS tomorrow. The law requires your property to go through a condominium conversion process that creates separate legal titles for the main house and the ADU. Think of it like splitting one parcel into two ownership units, similar to how a developer converts an apartment building into condos.
The Core Mechanism
Under AB 1033, your single-family property with an ADU is legally converted into a two-unit condominium. The main house becomes Unit 1. The ADU becomes Unit 2. Each unit gets its own title, its own legal description, and can be bought, sold, and financed independently. Common areas (driveways, landscaping, shared walls) are defined in the condo map and governed by an HOA.
What Changes After Conversion
- Before: One parcel, one title, one owner. ADU is an accessory structure. Cannot be sold independently.
- After: One parcel, two condo units, two titles. Each unit has its own deed. ADU can be sold to a separate buyer. An HOA governs shared elements.
The conversion does not change the physical property. Your house and ADU stay exactly where they are. What changes is the legal framework. Instead of owning one property with an accessory unit, you now own Unit 1 of a two-unit condominium, and Unit 2 (the ADU) has its own title that can be conveyed to a buyer.
Want to know what your ADU could sell for as a standalone condo? We pull comparable sales data for free.
💬 Text "ADU Value" to (213) 262-5092Requirements for Selling Your ADU Separately
Not every ADU qualifies. The AB 1033 process has specific requirements that your property must meet before you can proceed with the condo conversion. Here is what local ordinances typically require.
Condo Map Filing
You must hire a licensed surveyor to prepare a condominium map that precisely defines the boundaries of each unit, common areas, and exclusive-use common areas. This map is filed with the county and recorded with the County Recorder. It is the legal document that establishes the separate units.
HOA Formation
California condominium law requires a homeowners association for all condo projects, even one with only two units. You will need to draft CC&Rs (covenants, conditions, and restrictions) that spell out shared maintenance obligations, insurance requirements, assessment authority, and governance rules. Even though it is just you and one other owner, the HOA framework is legally mandatory.
Separate Utility Metering
The ADU must have independently metered utilities: electricity, gas, water, and sewer. If your ADU currently shares a meter with the main house, you will need to install separate metering before the conversion can proceed. This is one of the most common obstacles and can add significant cost.
Fire Separation
Building code requires adequate fire separation between the two units. For attached ADUs, this typically means a one-hour fire-rated wall assembly between the main house and the ADU. Detached ADUs generally meet fire separation requirements by virtue of physical distance, but verification is still required.
Independent Access
The ADU must have its own independent access that does not require passing through the main house. This includes a separate entrance, and in many cases, separate pathways to the street. Most properly designed ADUs already meet this requirement.
Some jurisdictions that adopt AB 1033 may impose owner-occupancy requirements. This could mean that the homeowner must live in either the main house or the ADU at the time of sale, or that the buyer of the ADU must occupy it as a primary residence. Check your local ordinance for specific owner-occupancy provisions. These restrictions are designed to prevent investor-driven speculation and keep ADU sales focused on creating owner-occupied affordable housing.
Thinking About Buying a Home With an ADU?
🏡 Browse LA Homes With ADU Potential →Costs: What the AB 1033 Conversion Will Actually Run You
The condo conversion process is not cheap. While you are not doing any physical construction (assuming your ADU already meets the requirements), the soft costs for legal, surveying, permitting, and administrative work add up quickly. Here is a realistic cost breakdown based on early estimates from real estate attorneys and surveying firms familiar with the process.
| Cost Category | Estimated Range | Notes |
|---|---|---|
| Surveying and Condo Map | $8,000 - $15,000 | Licensed surveyor, map preparation, filing |
| Legal Fees (CC&Rs, HOA) | $10,000 - $20,000 | Real estate attorney, HOA formation docs |
| City/County Processing Fees | $5,000 - $10,000 | Plan check, permit fees, recording fees |
| Utility Separation | $5,000 - $15,000 | If not already independently metered |
| Title and Escrow | $3,000 - $5,000 | Title insurance, escrow for the conversion |
| Fire Separation Upgrades | $2,000 - $8,000 | If attached ADU needs fire-rated assembly |
| Inspections and Miscellaneous | $2,000 - $5,000 | Building inspection, compliance verification |
| Total Estimated Soft Costs | $50,000 - $75,000 | Before any physical construction upgrades |
These numbers reflect the legal, administrative, and professional service costs. If your ADU needs physical upgrades to meet fire separation, utility metering, or accessibility requirements, construction costs will be additional. For a detached ADU that was built to current code with separate meters already in place, you will likely land closer to the $50,000 end. For an attached ADU needing utility separation and fire upgrades, expect the higher end or beyond.
If you spent $200,000 building a 600-square-foot ADU and can sell it as a standalone condo for $350,000 to $450,000 (comparable to small condo units in many LA neighborhoods), the $50,000 to $75,000 conversion cost still leaves a significant profit margin. The key is running the numbers for your specific situation: ADU build cost, conversion costs, and the realistic sale price based on comparable condo sales in your area.
Want us to run the numbers on your ADU? We will pull comps and estimate your net proceeds.
💬 Text "ADU Numbers" to (213) 262-5092Include your address and ADU details. We respond within 24 hours.
What Is Your Property Worth Right Now?
Before splitting your ADU, know your total property value. It shapes every decision.
Get Your Free Home ValueWho This Is For (and Who It Is Not For)
AB 1033 is not for every ADU owner. Understanding whether this path makes financial and practical sense for your situation is critical before spending money on attorneys and surveyors.
Good Candidates for AB 1033
- Built a permitted ADU and want to cash out your investment
- ADU is detached with separate entrance and meters
- Located in a jurisdiction that has adopted AB 1033
- No existing mortgage, or lender willing to release the ADU
- ADU sale price minus conversion costs yields meaningful profit
- Want to create an affordable homeownership opportunity
Not a Good Fit If...
- ADU was built before January 1, 2025 (check your local ordinance)
- ADU shares utilities with the main house and separation is costly
- Your city has not adopted AB 1033 and has no plans to
- Existing mortgage lender will not release the ADU from the lien
- Conversion costs exceed the projected profit margin
- You rely on rental income from the ADU
The Affordable Homeownership Angle
One of the primary motivations behind AB 1033 is creating affordable homeownership opportunities in a state where the median home price exceeds $800,000. A 600-square-foot ADU sold as a standalone condo at $350,000 to $450,000 puts homeownership within reach for first-time buyers, essential workers, and individuals who are priced out of the traditional single-family market. This is not just a wealth-building tool for ADU owners. It is a housing policy designed to expand the supply of attainable ownership units.
For more on ADU laws and regulations in Los Angeles, see our comprehensive guide.
💬 Want to Discuss Whether AB 1033 Makes Sense for You? Text UsThinking About Buying a Home With an ADU?
🏡 Browse LA Homes With ADU Potential →Step-by-Step: Converting Your ADU for Separate Sale
Here is the complete process from start to finish. The timeline from initiation to having a separately titled ADU ready for sale is estimated at 6 to 12 months, depending on your jurisdiction's processing speed and how quickly you can resolve any property issues.
Confirm Your Jurisdiction Has Adopted AB 1033
Contact your local planning department (city or county) and confirm that an AB 1033 ordinance has been adopted and is in effect. For unincorporated LA County, the effective date is April 4, 2026. For incorporated cities, check individually. Do not spend money on attorneys or surveyors until you have confirmed adoption.
Verify Your ADU Meets Eligibility Requirements
Confirm your ADU was properly permitted, was built after the eligibility date (typically January 1, 2025), has independent access, and meets fire separation standards. Check whether separate utility metering is already in place. Identify any deficiencies that need to be corrected before proceeding.
Engage a Real Estate Attorney
Hire an attorney experienced in condominium conversions and California real estate law. They will guide the entire process, draft the CC&Rs, form the HOA entity, and coordinate with the surveyor and your lender. This is not a DIY process. The legal complexity requires professional guidance.
Need a referral to a real estate attorney who handles AB 1033 conversions? We know the specialists.
💬 Text "Attorney Referral" to (213) 262-5092Hire a Surveyor and Prepare the Condo Map
A licensed surveyor will map the property, define unit boundaries, common areas, and exclusive-use common areas. The condo map must comply with the Subdivision Map Act and your local ordinance requirements. This is filed with the planning department and ultimately recorded with the County Recorder.
Address Utility Separation and Physical Upgrades
If your ADU shares utilities with the main house, arrange for separate meter installation through your local utility providers. Address any fire separation deficiencies. Complete all physical work before submitting the condo map for approval. Inspections will be required.
Resolve Mortgage and Lien Issues
Contact your mortgage lender early. Discuss a partial lien release for the ADU unit, or explore refinancing options. Your existing mortgage covers the entire parcel, and the lender must agree to release the ADU from the lien before the condo conversion can be recorded. This step can be the most time-consuming.
File the Condo Map and Record Separate Titles
Submit the condo map, CC&Rs, and all supporting documentation to your local planning and public works department for approval. Once approved, record the documents with the LA County Recorder. Upon recording, separate titles are created for each unit. Your ADU now has its own deed.
List and Sell the ADU on the MLS
With a separate title recorded, your ADU can be listed on the MLS as a condominium unit. Buyers can obtain conventional, FHA, or VA financing against the individual unit. Price based on comparable condo sales in your area, adjusted for size, finish quality, HOA dues, and location. This is where a real estate agent with ADU expertise makes the difference.
Cities That Have and Have Not Adopted AB 1033
AB 1033 adoption is happening at different speeds across California. Here is what we know as of March 2026 for the Greater Los Angeles area. This list will evolve as more cities take action.
| Jurisdiction | Status | Effective Date |
|---|---|---|
| LA County (Unincorporated) | Adopted | April 4, 2026 |
| City of Los Angeles | Under review | TBD |
| Pasadena | Under review | TBD |
| Glendale | Not yet adopted | TBD |
| Alhambra | Not yet adopted | TBD |
| San Jose | Adopted (early mover) | 2024 |
| West Sacramento | Adopted (early mover) | 2024 |
If your city is listed as "not yet adopted," contact your city council and planning department to express interest. Cities are more likely to adopt when they see resident demand. The City of Los Angeles, with its massive ADU inventory, would have the largest impact if it adopts.
Homeowners looking at house hacking with a duplex in LA should also consider how AB 1033 changes the math on ADU construction as an alternative strategy.
Check your specific city's AB 1033 status. We track adoption across LA County jurisdictions.
💬 Text Your City Name to (213) 262-5092Thinking About Buying a Home With an ADU?
🏡 Browse LA Homes With ADU Potential →Impact on Property Values and Tax Implications
Splitting your property into two condo units triggers several financial and tax consequences. Understanding these before you start the process is essential.
Property Tax Reassessment
When the ADU is sold as a separate unit, the LA County Assessor will reassess the ADU at its new sale price. Your primary residence retains its existing Prop 13 base year value. The buyer of the ADU will be assessed at their purchase price. This means property taxes on your main house should not change, but the ADU will generate a new, separate tax bill based on its sale price.
Capital Gains Tax
The sale of the ADU is a taxable event. Capital gains tax applies to the difference between your basis in the ADU (construction cost plus conversion costs) and the sale price. If the ADU was part of your primary residence and you have lived on the property for at least two of the last five years, a portion of the gain may qualify for the Section 121 capital gains exclusion ($250,000 for single filers, $500,000 for married filing jointly). However, because you are selling only the ADU portion, the allocation of the exclusion requires careful tax planning. Consult a CPA or tax attorney before proceeding.
Impact on Your Main Home's Value
Here is the nuance many homeowners miss: after selling the ADU, your remaining property is a main house in a two-unit condo complex with an HOA, not a standalone single-family home. This can affect your home's marketability and value. Some buyers prefer single-family homes without HOA obligations. Others see value in a smaller, more manageable property. The net impact depends on your neighborhood, the quality of the condo setup, and buyer preferences in your local market.
The tax implications of splitting a property and selling a portion are complex. Capital gains allocation, depreciation recapture (if you ever rented the ADU), Prop 13 base year adjustments, and potential transfer tax all require professional guidance. Hire a CPA or tax attorney familiar with California real estate and condominium conversions before you commit to the AB 1033 process.
If you already own investment property, our guide on buying when you already own one covers financing strategies that may apply to your situation after the ADU sale.
💬 Need a CPA Referral for AB 1033 Tax Planning? Text UsThe Mortgage and Lender Challenge
This is the section most AB 1033 guides skip, and it may be the single biggest practical obstacle you will face. If you have an existing mortgage on your property, your lender holds a lien on the entire parcel, including the ADU. You cannot split the property into two condo units and sell one without the lender's cooperation.
What Lender Cooperation Looks Like
- Partial lien release: The lender agrees to release the ADU unit from the existing mortgage lien while maintaining the lien on the main house. Some lenders have processes for this; many do not.
- Refinance: You refinance your existing mortgage into a new loan that covers only the main house (Unit 1). The ADU is released from the lien and can be conveyed with clear title.
- Payoff: You pay off the existing mortgage entirely, eliminating the lien on both units. Then sell the ADU with clear title.
The reality is that most residential mortgage servicers have never encountered an AB 1033 request. Their systems, underwriting guidelines, and legal departments are not set up for it. Expect delays, confusion, and potentially a flat "no" from some lenders. This is a new process for everyone, and institutional inertia is real.
Do not wait until your condo map is ready to contact your lender. Start the conversation immediately. Ask to speak with someone in the lien release or collateral department, not your regular loan servicing representative. Document everything in writing. If your lender refuses, explore refinancing with a lender that supports AB 1033 conversions. Some credit unions and portfolio lenders are more flexible than large national servicers.
Navigating lender approval is the hardest part. We can connect you with lenders who understand AB 1033.
💬 Text "Lender Help" to (213) 262-5092Quick Reference: AB 1033 Decision Cheat Sheet
Save this cheat sheet. Then text us to get a personalized AB 1033 assessment for your property.
💬 Text (213) 262-5092What Is Your Property Worth Right Now?
Thinking about selling your ADU? Start with your total property value.
Get Your Free Home ValueFrequently Asked Questions
Can I sell my ADU separately from my house in Los Angeles?
Yes, if your jurisdiction has adopted AB 1033. LA County (unincorporated areas) adopted the ordinance effective April 4, 2026. The ADU must go through a condominium conversion process where a condo map is filed, an HOA is formed, and a separate title is created for the ADU unit.
What is AB 1033 and when was it signed into law?
AB 1033 is a California state law signed by Governor Newsom in October 2023. It authorizes local jurisdictions to adopt ordinances allowing homeowners to sell their ADU as a separate condominium unit. Each city or county must opt in by passing its own ordinance.
How much does the AB 1033 conversion cost?
Estimated soft costs range from $50,000 to $75,000, covering surveying and condo map preparation, legal fees for CC&Rs and HOA formation, city processing and permit fees, utility separation, title and escrow, fire separation upgrades, and inspections. Physical construction upgrades would be additional.
Which ADUs are eligible for separate sale?
Eligibility depends on your local ordinance. Common requirements include the ADU being properly permitted and built after January 1, 2025, having independent access and separate utility metering, and meeting fire separation standards. Some jurisdictions impose owner-occupancy requirements.
Have a question not answered here? We respond to every text personally.
💬 Text Your Question to (213) 262-5092Do I need to form an HOA to sell my ADU separately?
Yes. California condominium law requires a homeowners association for all condo projects, even a two-unit project consisting of just the main house and the ADU. You will need CC&Rs, a budget for shared maintenance, and a governance framework. This is a legal requirement of the condo conversion process.
What are the tax implications of selling my ADU separately?
The ADU sale triggers capital gains tax on the profit (sale price minus your basis). Your primary residence retains its Prop 13 base year value. A portion of the gain may qualify for the Section 121 exclusion if you lived on the property for two of the last five years. Consult a CPA or tax attorney for your specific situation.
Can I sell my ADU separately if I still have a mortgage?
Your lender must agree to release the ADU from the existing mortgage lien. This may require a partial lien release, a refinance, or a full payoff. Contact your lender early in the process because this step can be the most time-consuming. Some lenders may refuse.
What is the difference between AB 1033 and traditional condo conversion?
Traditional condo conversion applies to existing multi-unit rental buildings and is subject to strict tenant protections, lottery systems, and conversion caps. AB 1033 creates a streamlined process specifically for ADUs on single-family lots, bypassing many traditional restrictions. The process is simpler but still requires a condo map, HOA formation, and local ordinance compliance.
Related Homeowner Resources
Ready to Explore Selling Your ADU?
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