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San Diego Custom ADU Builder

Trusted Custom ADU Builders in San Diego

We bring your ADU vision to life — from zoning and permits to full construction, handled by a local, award-winning team.

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Dreaming of a Custom ADU That Fits Your San Diego Property Perfectly?

Urbatect specializes in fully custom ADUs designed specifically for San Diego homes and local regulations. Every ADU is created from the ground up to match your property, lifestyle, and long-term goals while maximizing your lot’s potential and overall property value.

From your first concept to permits and full construction, our in-house team manages the entire process. We handle the complexities of San Diego’s zoning, planning, and building requirements, so you don’t have to – making your ADU experience clear, streamlined, and stress-free.

With Urbatect, you get a custom ADU and a coordinated, end-to-end team focused on delivering quality, clarity, and results from start to finish.

Serving Homeowners
Across San Diego County

As a trusted and local design build firm in Alameda county, we serve homeowners throughout Alameda county.

Our team understands local zoning, planning departments, and permitting requirements across the region.

We provide ADU design, permitting, and ADU construction services in:

Our Completed Custom home Projects

Milpitas ADU

Milpitas

Castro Valley ADU & Office/Gym Space

Castro Valley, CA

Albany ADU

Albany, CA

Custom Home​

Santa Rosa​

Arcilla ADU

San Diego

Sawgrass Residence

Santa Rosa​

Our Step by Step Approach Creating Your Dream ADU in San Diego

Consultation & Site Visit

Every San Diego ADU project begins with a consultation and site visit to understand your vision, assess your property, and review what’s possible under local ADU regulations. Whether you’re planning a detached ADU, garage conversion, or attached unit, we guide you through feasibility, planning, and early budgeting to help turn your ADU goals into a clear path forward.

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Consultation & Site Visit Illustration

ADU Designing

Our designers work closely with you and our construction team to create a custom ADU design that balances aesthetics, functionality, and cost. By aligning design and construction early, we help reduce surprises and stay on budget. From 3D renderings to permit-ready plans, every detail is developed for efficiency, compliance, and long-term value.

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ADU Designing Illustration

ADU Permits

Getting an ADU permit in San Diego doesn’t have to be stressful. We prepare accurate submittals and handle coordination with city or county officials to help avoid unnecessary delays. Our permit technician team manages the process from paperwork to plan check corrections helping move your project through approvals as efficiently as possible.

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ADU Construction

With over 15 years of experience, our construction team brings your ADU to life with quality craftsmanship and attention to detail. From foundation to finishes, we manage every phase of construction to ensure timely completion. You’ll have a dedicated project manager keeping you informed so there are no surprises, just a well-built ADU tailored to your property.

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ADU Construction Illustration

Most trusted adu builders in San Diego

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1,000+ Happy Customers.
Real Stories, Real Results.

Yelp Reviews

  •   After speaking with several construction companies on getting a permitted ADU built at a property, Urbatect seemed to be the most organized and reasonable in terms of timeline, quality, and... read more

    thumb Nico W.
    3/26/2025

      I worked with Urbatech to plan the construction of an detached ADU in the backyard of my home. I had contacted several ADU construction companies to discuss the process... read more

    thumb Ronald S.
    11/27/2024

      Worked with Urbatect Development to build an ADU in backyard. They worked with us getting the price we wanted as well as including upgrades that were deal breakers for us.... read more

    thumb Brian S.
    10/15/2024
  •   I was in a panic. I have been trying for 5 months to simply put in a window through hcd because I have a manufactured home. Endless delays. After being... read more

    thumb Dori R.
    10/05/2024

      We are very satisfied with the work that Urbatect has provided us. We have worked together on several engineering projects and the team has always provided us with a superior... read more

    thumb Joe P.
    9/17/2024

      Amazing service, excellent quality on design , for sure they will be my engineers for all my projects.
    I highly recommend them.

    thumb Lizzeth B.
    9/12/2024
  •   Although there was some variability in the people I worked with as a client to Urbatect, I'm going to focus my evaluation on the outstanding engineer I worked with, Jay.... read more

    thumb Gary O.
    7/26/2024

The Urbatect Advantage

What Sets Us Apart

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Start Your ADU Project Now!

FAQs

ADU costs in San Diego vary based on size, type (detached, attached, garage conversion), finish level, and site conditions. Use our ADU Cost Calculator at https://www.urbatect.com/adu-cost-calculator to get a personalized estimate for your project.

A typical ADU project in San Diego takes approximately 8–14 months from design through construction completion. Urbatect’s integrated design-build approach can deliver projects 25–30% faster than traditional methods.
San Diego allows detached ADUs, attached ADUs, garage conversions, and JADUs on most single-family residential lots. Specific size limits, setback requirements, and regulations vary by zone.
Most single-family properties in San Diego are eligible for at least one ADU under California state law. During our free consultation and site visit, we assess your lot, zoning, and local regulations to determine exactly what you can build.
ADUs increase property value, generate rental income, and provide flexible living space. In San Diego’s strong rental market, a well-designed ADU can offer significant return on investment.

ADU financing options include home equity loans, HELOCs, construction loans, cash-out refinancing, and ADU-specific loan programs. Urbatect coordinates financing timelines with the design-build process, aligning lender draws to project milestones. Learn more at https://www.urbatect.com/adu-financing.