ADU Construction

Accessory Dwelling Unit

“Usually an ADU is a secondary housing unit on a residential lot, providing a compact living space that complements the main residence.”

Thinking About Building an ADU on Your San Diego Property?

Accessory Dwelling Units (ADUs), also known as granny flats, in-law suites, or casitas, are independent living spaces either attached or detached from the main home. They provide a versatile solution for accommodating family members or generating rental income. As space for new homes becomes limited and large construction projects become costly, ADUs offer a practical and popular alternative to address the local housing crisis.

Why Choose The Ace Builder for Your ADU Project?

Based in San Diego, The Ace Builder specializes in the complete process of planning, designing, and constructing ADUs. From initial planning and architectural design to permitting and final construction, our team offers a seamless, turn-key service. Start with a free consultation to determine if your property qualifies for an ADU.

Benefits of Building an ADU on Your San Diego Property

  • Accommodate Family Members: Provide independent living space for aging parents or adult children.
  • Generate Rental Income: Create a rental unit to supplement your income.
  • Increase Property Value: Significantly boost your property’s overall value.

ADU Regulations in California

  • Permissible Units: You can build one full ADU and one Junior ADU (JADU) on a qualifying property.
  • Setback Requirements: Minimum of 4 feet from the sides and rear of your property.
  • Size Limits: ADUs can be up to 1,200 square feet and up to 24 feet tall without special approvals. Smaller municipalities must still allow ADUs up to 850 square feet, or 1,000 square feet for two-bedroom units.


Building an ADU is a smart investment, but it’s essential to ensure compliance with local regulations to avoid potential refinancing or resale issues, as well as fines or mandatory removal of the unit.

Why Choose The Ace Builder?

We have extensive experience with local municipalities and can guide you through the approval and permitting process. Our expertise ensures a smooth journey from concept to completion.

Cost of Building an ADU in San Diego

  • Typical Cost Range: $225 to $350 per finished square foot.
  • All-Inclusive: Includes planning, design, permits, site work, sewer connection, and finishes.
  • Example Costs:
    • 850 square foot ADU: $191,250 to $297,500
    • 1,200 square foot ADU: $270,000 to $420,000

Costs can vary based on site specifics, accessibility, and finishing choices.

The Ace Builder’s Expertise

Choosing The Ace Builder means selecting a partner with a deep understanding of the local regulations and a commitment to delivering quality results. Our team is adept at handling the nuances of San Diego’s building codes, ensuring that your ADU project is completed without unnecessary delays or complications. We pride ourselves on our transparent communication and dedication to customer satisfaction.

Design and Customization

Our architectural team works closely with you to design an ADU that not only meets your functional needs but also complements the aesthetic of your existing property. Whether you envision a modern studio or a cozy two-bedroom unit, we provide customized solutions to bring your vision to life. Our designs prioritize space efficiency, natural light, and sustainable building practices to create a living space that is both comfortable and environmentally friendly.

Streamlined Process

From the initial consultation to the final inspection, The Ace Builder streamlines every aspect of the ADU construction process. Our project managers coordinate with various stakeholders, including architects, engineers, and local authorities, to ensure that all phases of the project are executed seamlessly. Our goal is to make the process as stress-free as possible for you, allowing you to focus on the exciting prospect of adding a valuable new space to your property.

Financing Your ADU

Financing an ADU can be a significant consideration for many homeowners. The Ace Builder offers guidance on financing options that can help make your project more affordable. We can connect you with lenders who specialize in ADU financing, ensuring you receive competitive rates and terms that suit your budget. Additionally, building an ADU can be a long-term investment that pays off through rental income or increased property value.

Get Started Today

Schedule a consultation to discuss your ADU project. Call us at (888) 444-3570 or fill out our online request form, and we’ll get back to you promptly. Let The Ace Builder help you transform your property with a custom ADU that meets your needs and enhances your living space.

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