How Much Should You Sell Your ADU For in California?

Written By: Jon Grishpul
Last updated Sep 23, 2026
Written By: Jon Grishpul
Last updated Sep 23, 2026
How Much Should You Sell Your ADU For in California?

You can’t sell an ADU separately from the main home in most of California, since it shares the lot, but a property with an ADU sells for more, often adding $100,000 or more in value depending on the unit’s size and rental income. Some new laws allow selling ADUs as condos in limited cases. Here’s how an ADU affects your home’s sale value.

If you’re reading this, you may have heard of the radical new California law that allows homeowners to sell an ADU on their property. We’re talking about Assembly Bill 1033 (AB1033), which states that property owners can build and sell ADUs on their land, independent from the primary dwelling on the property – essentially following the same regulations as condominiums. 

 So, does this mean you can sell your ADU?

The short answer is–it depends. Keep reading to learn the specific regulations and requirements to find out if AB1033 applies to your situation.

Here at GreatBuildz, a free service that connects homeowners in California with reliable general contractors, we help homeowners navigate their ADU projects every day.

lawyer with client legal requirements to sell your adu

Legal Requirements to Sell Your ADU

Selling an ADU in California requires compliance with certain legal requirements. Firstly, the ADU must be built as a permitted project, meaning it meets all the necessary building codes and regulations. The ADU must be located on the homeowner’s primary residence. 

It cannot be built as a separate lot or on a property that is already a rental unit. These regulations may vary depending on the city or county where the ADU is located. 

The Market Value of ADUs in California

The market value of ADUs in California is influenced by various factors, including the overall housing market, the square footage of the ADU, and the local demand for additional living space.

The value of an ADU can be estimated by considering the cost per square foot of construction and the potential rental income it can generate. The location within California can also impact its market value, with high-demand areas typically commanding higher prices – something to consider when it’s time to sell your ADU. 

Factors Influencing ADU Prices

Several factors influence the prices of ADUs in California. Here are some key factors to consider:

  • Square Footage: The size of the ADU plays a significant role in determining its price. Larger ADUs with more square footage tend to be more expensive to build.
  • Cost of Construction: The cost of constructing an ADU can vary depending on factors such as labor costs, materials used, and the complexity of the project.
  • Location: The location of the ADU within California can affect its price. High-demand areas, such as San Francisco or Los Angeles, may have higher prices compared to less populated/dense areas.
  • Market Demand: The demand for housing or ADUs in a particular area can also impact their prices. If there is a high demand for additional housing options, ADUs may be priced higher.
  • Amenities and Features: ADUs with additional amenities, such as a private entrance or upgraded finishes, may have higher prices compared to basic ADUs.

Average Cost of Construction for Different Types of ADUs

The average cost of different types of ADUs in California can vary depending on factors such as size, site conditions, and level of customization. Here is a breakdown of the average price range for the main different types of ADUs:

Type of ADU Average Cost Range
New Construction ADU $150,000 – $400,000
Garage Conversion $110,000 – $200,000
Interior Conversion $50,000 – $150,000

 

These price ranges are estimates and can vary based on factors such as materials used, labor costs, and location within California. It is recommended to consult with a contractor or ADU specialist to get a more accurate cost estimate for a specific ADU project.

ADU ventura

How ADUs Add Value to Your Property

ADUs can add significant value to your property in multiple ways. Firstly, they provide additional living space, which increases the overall livable square footage of the property. This additional space can increase the property’s value in the real estate market.

Secondly, ADUs offer the opportunity to generate rental income. By renting out the ADU, homeowners can earn extra income, making the property a good investment.

Lastly, ADUs can also provide flexibility for homeowners, allowing them to accommodate family members and guests, or even use the space as a home office or studio.

Earning Potential Through Rental Income

ADUs offer homeowners the opportunity to generate rental income. By renting out the ADU, homeowners can earn extra money each month, which can help offset mortgage payments or provide additional passive income.

The rental income potential of an ADU will depend on factors such as location, size, number of bedrooms, and market demand. It is important to research the rental market in your area to determine the potential income you can expect from an ADU. 

Potentially Decreasing Property Value if You Sell Your ADU

Homes with ADUs tend to be valued higher than homes without ADUs. That would also mean the value of your property will decrease when you sell your ADU. ADUs are often seen as investments that can increase a property’s value over time. By selling your ADU, you may miss out on potential appreciation in value that could come from having the additional living space on your property.

Related: New ADU Laws in California 2024

real estate agent discussing price of adu

Pricing Your ADU: A Strategic Approach

Pricing your ADU strategically is essential to maximize its value and appeal to potential buyers. It is recommended to consult with an appraiser or real estate professional to determine the market value of your ADU.

By setting a competitive price based on the market value, you can attract potential buyers and increase the chances of selling your ADU. Strategic pricing is important to ensure a smooth sales process and achieve the optimal value when you sell your ADU.

Assessing Your ADU’s Unique Features

When pricing your ADU, it is important to assess the unique features that set it apart from other properties. Consider the square footage and layout of the ADU, as well as any special amenities or upgrades. These unique features can increase the value and appeal of your ADU to potential buyers. Taking stock of your ADU’s unique features and providing accurate information can contribute to an accurate appraisal and a successful sales process.

Comparative Market Analysis for Accurate Pricing

To ensure accurate pricing for your ADU, it is recommended to conduct a comparative market analysis (CMA). A CMA involves analyzing recent sales of similar properties in the area to determine the market value of your ADU. It provides insights into the current real estate market trends and helps identify the appropriate price range for your ADU. 

Consulting with an appraiser or real estate professional familiar with the local market can assist in conducting a thorough CMA. By using a comparative market analysis, you can set a competitive and realistic price when you sell your ADU, increasing the chances of a successful sale.

different neighborhoods

The Impact of Location on ADU Valuation

The location of an ADU within California can significantly impact its valuation. Different regions in California have varying levels of demand for housing, which can influence the property value. 

High-demand areas such as San Francisco, Los Angeles, and San Diego tend to have higher property values, including ADUs. The neighborhood’s desirability, access to amenities, and proximity to employment centers can also contribute to the valuation of an ADU. Considering the location when preparing to sell your ADU and understanding the local real estate market can help determine the appropriate pricing strategy to maximize its value.

Handling the Sales Process – Partner with a Realtor

To sell your ADU in California, you must handle the sales process, which includes marketing the property, negotiating offers, and closing the deal. Working with a realtor experienced in ADUs can be valuable in ensuring a smooth and successful sales process. A realtor can assist in marketing the ADU, finding potential buyers, and handling the necessary paperwork and negotiations. 

They can guide pricing, staging the property, and showcasing its unique features. By partnering with an experienced realtor, homeowners can maximize their chances of selling their ADU for a desirable price and completing a successful transaction.

Closing the Deal: Tips and Best Practices

Closing the deal on the sale of an ADU involves several steps and considerations. Here are some tips and best practices:

  • Work with a qualified appraiser: Ensure that an appraiser accurately assesses the value of the ADU to avoid any discrepancies during the closing process.
  • Communicate with the lender: Keep the lender informed about the sale of the ADU and provide any necessary documentation to facilitate the closing process.
  • Review the sales contract: Carefully review the sales contract with the buyer to ensure that all terms and conditions are agreed upon and fair.
  • Conduct a final walkthrough: Before closing, conduct a final walkthrough of the ADU with the buyer to address any questions or concerns.
  • Consider hiring a real estate attorney: If needed, consult with a real estate attorney to ensure that all legal requirements are met and to protect your interests throughout the closing process.

By following these best practices, homeowners can handle the closing process smoothly and successfully sell their ADU.

adu in a california backyard

Profit Off Your Property

Understanding the nuances of AB 1033 and selling an ADU in California involves considering various factors like legal requirements, market value, property value enhancement, and strategic pricing. 

By understanding the impact of unique features, location, and market demand on ADU valuation, you can strategically price your property for maximum returns. Using the earning potential through rental income and increased property value can make selling an ADU a lucrative investment opportunity tailored to California’s real estate landscape.

Frequently Asked Questions

Can you sell an ADU separately in California?

In most cases, no. An ADU shares the lot with the main home, so it is sold together with the property. However, some newer laws (like AB 1033, where adopted locally) let owners sell an ADU as a condominium in participating cities. Check whether your city has adopted such a program.

How much value does an ADU add to a home?

An ADU often adds $100,000 or more to a home’s value, depending on its size, quality, and rental income potential. Appraisers consider the added square footage and the income it can generate. In high-rent areas, the value boost can be even larger.

Does an ADU make a home harder to sell?

Usually not; it often makes it more attractive by offering rental income or multigenerational space. A permitted, well-built ADU is the key. An unpermitted unit can complicate a sale, so make sure the ADU is legal and documented before you list.

GreatBuildz is a free service that connects homeowners in Los Angeles, Ventura, Orange, and San Diego Counties with reliable, thoroughly screened ADU contractors and provides project support from start to finish.

 

Submit the form below or give us a call at 818.317.3567 to get started on your next project.

<a href="https://www.greatbuildz.com/author/jon-grishpul/" target="_self">Jon Grishpul</a>

Jon Grishpul

Jon Grishpul is the co-founder of GreatBuildz, Co-CEO of Maxable, and a recognized expert in home remodeling and ADUs. Since he co-founded GreatBuildz in 2019, the company has evaluated 20,000+ California contractors and helped 2,000+ homeowners. With years of experience in construction, consulting, and technology, he has been featured in Forbes, the Los Angeles Times, and US News & World Report. Jon helps homeowners navigate their renovation projects and he is committed to providing them with transparent, trustworthy guidance so they can renovate with confidence and clarity.

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