Discover Cost to Build an ADU in Sacramento 2024
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Discover Cost to Build an ADU in Sacramento 2024

|May 6, 2024

Looking to build an ADU in Sacramento? Dive into the essentials of prefab ADUs, ADU permit cost Sacramento county, and overall expenses to construct an accessory dwelling unit (ADU) in Sacramento. Whether you're a homeowner or investor, understanding the cost breakdown is crucial. From permit expenses to construction costs, we'll explore the intricacies of ADU development in Sacramento. Stay informed about the latest regulations and explore the cost to build an ADU in Sacramentos, making your ADU journey in Sacramento smoother and more cost-effective. Let's delve into the specifics of ADU in Sacramento and the associated costs to guide your project efficiently.

Your Comprehensive Guide to an ADU in Sacramento

This guide unpacks the costs associated with building an ADU in Sacramento in 2024, empowering you to make informed decisions as you embark on your ADU journey.

Planning and Design

Every ADU starts with a vision. To translate that vision into reality, you'll need a team of professionals to handle land surveys, engineer calculations, architectural drawings, and energy evaluations. Expect costs to range from $6,000 to $14,000. This variability depends on the complexity of your design, the size of the ADU, and the experience level of the professionals you hire.

Planning and Design- ADU cost in Sacramento

City Charges

Building an ADU in Sacramento comes with city fees. These typically include:

  • Plan check fees: These fees cover the city's review and approval of your ADU plans.
  • Impact fees: These fees are calculated based on the size of your ADU and contribute to infrastructure improvements necessitated by the new unit.
  • Utility connection fees: These fees cover the cost of connecting your ADU to city utilities.

The total ADU cost in Sacramento of city charges can range anywhere from $3,000 to $11,000. Be sure to consult with the City of Sacramento's Department of Planning and Development for the latest fee schedule and any applicable exemptions.

Construction Costs

This is where the magic happens – transforming your plans into a functional living space. Labor and material costs are significant factors here, and the final price tag depends on several key choices:

  • Contractor Selection: The experience and scope of work undertaken by your contractor will significantly impact the cost.
  • Type of ADU: Converting an existing structure like a garage is generally more affordable than building a new ADU from scratch. Converting a two-car garage into an ADU can cost between $111,750 and $158,750, whereas constructing a new unit can range from $146,500 to $216,500.

Construction Costs - ADU cost in Sacramento

Prefab vs. Site-Built ADUs

Prefabricated ADUs offer a unique advantage - a predictable price range. These prefabricated units are constructed in a factory setting and then delivered and assembled on-site. This streamlined process translates to cost savings, with prefab ADUs typically ranging from $100,000 to $350,000, depending on size, finishes, and customization options.

On the other hand, site-built ADUs offer complete design freedom. You can work with an architect to create a completely customized unit that seamlessly integrates with your existing property. However, this flexibility comes at a cost. Site-built ADUs can range from $150,000 to upwards of $400,000 depending on location, complexity, and the quality of materials used.

Prefab vs. Site-Built ADUs

Allocating Funds

A good rule of thumb is to allocate around 80% of your total ADU budget toward construction costs (materials and labor). The remaining 20% will cover permitting, design, and any additional consulting fees you may incur.

The Takeaway

Building an ADU is a significant investment, but with careful planning and a realistic understanding of the costs involved, you can turn your vision into reality. This guide equips you with the knowledge to make informed decisions throughout the process, from navigating permit fees to choosing between prefab and site-built options. Remember, consulting with experienced professionals like architects, contractors, and financial advisors can further streamline the process and ensure a successful ADU addition to your Sacramento property.

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1. What is the California ADU size limit?

The California ADU size limit varies depending on the local jurisdiction's regulations. However, recent laws have eased restrictions, allowing for larger ADUs than in previous years. It's essential to check with your local planning department for specific size limitations in your area.

2. Are there prefab ADUs available in Los Angeles and San Diego?

Yes, prefab ADUs are increasingly popular in both Los Angeles and San Diego. These units offer a convenient and efficient solution for adding additional housing on properties in urban areas where space is limited. Homeowners can explore various prefab ADU options to find one that suits their needs and budget. Read Prefab ADUs in San Diego and Prefab ADUs in Los Angeles to know all about that.

3. Are there California ADU grants available?

Yes, there are California ADU grants available to assist homeowners with the costs associated with building an ADU. These grants vary in availability and eligibility criteria, so it's essential to research and inquire with local housing authorities or non-profit organizations to explore potential funding opportunities.

Are there California ADU grants available?

4. How big can an ADU be in California?

How big can an ADU be in California is determined by local regulations and zoning ordinances. While there are no statewide size limits, individual cities and counties may impose restrictions on the maximum size of ADUs allowed on residential properties. Homeowners should consult with their local planning department to understand the specific size limitations applicable to their property.

5. What are the new ADU laws in California in 2024?

As of 2024, California continues to refine and update its ADU laws to promote affordable housing and address the state's housing crisis. These laws may include provisions for streamlining the ADU approval process, reducing development fees, and increasing flexibility in ADU design and construction. Homeowners should stay informed about any changes in ADU regulations that may affect their projects. Read new ADU laws in California in 2024 to know more.

6. What are the ADU requirements in California?

ADU requirements in California encompass various factors, including zoning regulations, building codes, and permitting processes. These requirements may vary depending on the location and type of ADU being constructed. Common requirements include compliance with setback requirements, parking provisions, and size limitations. Homeowners should work closely with local authorities and professionals to ensure their ADU project meets all necessary requirements.



Building an ADU in California, particularly in cities like Los Angeles and San Diego, presents an opportunity for homeowners to increase property value, generate rental income, and address housing needs. With recent updates to ADU laws and regulations in 2024, the process has become more accessible and streamlined. Homeowners can take advantage of prefab ADUs and explore available grants to offset construction costs. Understanding ADU size limits and requirements is crucial for a successful project. By staying informed and working with local authorities and professionals, homeowners can navigate the ADU development process with confidence and maximize the benefits of this valuable addition to their property.

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