Design, permit and build your ADU.
San Diego’s Leading ADU Builder
SnapADU is a design & construction contractor specializing exclusively in detached new accessory dwelling units (ADUs) in San Diego County. With 100+ completed ADUs, we deliver predictable pricing through a fully accountable design-build process. Our in-house team manages every phase, from feasibility and permitting through construction, so you can stay focused on what you do best. Proudly woman-owned and trusted across Greater San Diego.
126
ADUs Built & Under Construction Across Greater San Diego
Explore Greater San Diego ADU Projects
As an all-in-one accessory dwelling unit design build contractor, our portfolio ranges from standard, efficient designs to expansive, custom projects. Whether you’re interested in a small backyard cottage, a large guest house, a two-story carriage house, or multiple units, we are experienced accessory dwelling unit builders in San Diego, well-equipped to bring your vision to life.
San Diego’s Largest Detached ADU Design & Building Company
- 100+ ADU builds completed across San Diego County
- Focused exclusively on detached new construction ADUs since 2020
- In-house design, permitting, and construction management team
- Transparent fixed-price model before permit submission
- Fully licensed and insured, with transferable warranty
- Largest woman-owned ADU builder in California
- 4.9+ average rating across Google, Yelp, and Houzz
As an experienced San Diego ADU Contractor, SnapADU has completed more than 100 ADU builds. 90%+ of our projects submitted for permits in 2022-2023 were built, while the industry average for San Diego is only 30%; they get delayed by permits or costs balloon out of control.
More SnapADU construction products finish on time because we focus on feasibility first.
“I’m so impressed. There’re some very smart and trustworthy people on this experienced team. I feel lucky I’m working with them. My ADU is looking great.” – Alice Xu, Carlsbad Homeowner
How San Diego Homeowners Are Using ADUs
Homeowners choose accessory units for many reasons: income, flexibility, or keeping family close. Hear directly from our clients below.
Bret D.
Encinitas Homeowner
“Anyone considering an ADU project who wants it to be clean, simple, straightforward, and fairly priced — I would totally recommend SnapADU.”
The Winter Family
Oceanside Homeowners
“The value of working with SnapADU was tremendous…. I got a lot of sleep at night.”
Peter Courture
Poway Homeowner
“Being close to my kids was really important to me, especially because I’m handicapped, and building an accessible unit made that possible.”
Search ADU Floor Plans
Find inspiration in the ADU floor plans from our library. Starting with a plan that has been built before can help speed up the design process. We also offer custom designs and can modify any plan or start with your own drawings.
Our in-house designers ensure your floor plan & elevations work with the rest of your property constraints and can be permitted with the city.
Size of unit:
Beds:
Baths:
Stories:
Need a custom ADU floor plan?
Can I customize my ADU floor plan? Yes, our in-house drafting team specializes in adapting plans to lot topography and guidelines. Whether you’re interested in modifying an existing floor plan, working with a strict HOA, or envisioning a completely custom ADU, we’ve got you covered.
Reach out to us to discuss the possibilities as your ADU builder. Our specialized in-house drafting team is eager to collaborate with you, ensuring your custom accessory dwelling unit is executed seamlessly.
Full accountability. ADU Expertise. Proven results.
Construction-Based Feasibility Before Design
Most ADU feasibility reviews focus on zoning allowances and conceptual layouts. SnapADU’s ADU construction services start by assessing the buildable envelope, site access, utilities, fire requirements, and constructability so pricing reflects what can actually be built on your property.
Rather than offering a ballpark estimate after a walk-through, our Feasibility SnapShot evaluates 75+ project variables to deliver precise pricing and lock in your ADU construction costs before submitting to the city.
With over 100 ADU builds completed, we are ADU contractors who have already solved the problems your project will face.
That is how we provide the predictability you should expect on a highly specialized backyard construction project.
Integrated Design-Build With One Accountable Team
Building detached ADUs requires coordination across zoning, utilities, design, engineering, permitting, and construction. When those phases are spread across separate firms, risk increases and accountability blurs.
SnapADU integrates the entire process under one in-house team for a turnkey design-build experience. We consider the full ADU cost from day one for cost predictability and clear responsibility at every step.
Feasibility & Budget
Can you build an ADU on your property? What will it realistically cost? We evaluate your lot, utilities, fire access, and zoning upfront so you get a clear budget range and timeline before moving forward.
ADU COSTS
Design Selections
Our curated interior & exterior designs create a cohesive look for your accessory home project. Choose from our catalog of styles, or work with our ADU designers to create a custom floorplan.
ADU DESIGNS
Architectural Plans
We create build-ready architectural plans tailored to your lot and budget. Start from one of our pre-approved floor plans to maximize efficiency, or customize ADU house plans with our in-house team.
ADU PLANS
Construction
As a licensed general contractor specializing in detached ADUs, we manage construction from mobilization to final inspection with defined timelines, cost predictability, and dependable warranty support.
BUILD PROCESS
Rental Support
Building to rent? We help you design for long-term value, based on what has worked across 100+ ADU builds in San Diego. Read how to plan for the best ADU design build to maximize rent potential.
ADU RENTAL GUIDE
Permit Processing
We prepare all plans and paperwork for submission to the municipality. Our own employees handle agency coordination to move your project efficiently through the plan check and permitting processes.
ADU REGULATIONS
Project Management
Structured processes and real-time visibility keep your project moving from design through build. Access the current schedule, documents, photos, approvals, and invoices through our online portal.
PROJECT MANAGEMENT
Find Property
Looking to buy a property and build an additional unit? Our ADU services in San Diego include assessing realistic construction costs so you can make informed decisions and plan your ADU with confidence.
ADU Investments
Feasibility & Budget
Can you build an ADU on your property? What will it realistically cost? We evaluate your lot, utilities, fire access, and zoning upfront so you get a clear budget range and timeline before moving forward.
ADU COSTS
Architectural Plans
We create build-ready architectural plans tailored to your lot and budget. Start from one of our pre-approved floor plans to maximize efficiency, or customize ADU house plans with our in-house team.
ADU PLANS
Permit Processing
We prepare all plans and paperwork for submission to the municipality. Our own employees handle agency coordination to move your project efficiently through the plan check and permitting processes.
ADU REGULATIONS
Design Selections
Our curated interior & exterior designs create a cohesive look for your accessory home project. Choose from our catalog of styles, or work with our ADU designers to create a custom floorplan.
ADU DESIGNS
Construction
As a licensed general contractor specializing in detached ADUs, we manage construction from mobilization to final inspection with defined timelines, cost predictability, and dependable warranty support.
BUILD PROCESS
Rental Support
Building to rent? We help you design for long-term value, based on what has worked across 100+ ADU builds in San Diego. Read how to plan for the best ADU design build to maximize rent potential.
ADU RENTAL GUIDE
Find Property
Looking to buy a property and build an additional unit? Our ADU services in San Diego include assessing realistic construction costs so you can make informed decisions and plan your ADU with confidence.
ADU Investments
Project Management
Structured processes and real-time visibility keep your project moving from design through build. Access the current schedule, documents, photos, approvals, and invoices through our online portal.
PROJECT MANAGEMENT
Explore ADU Inspiration
ADU Design Ideas
Not sure where to start with the hundreds of choices to make for your interior & exterior guest home design? As a premier ADU builder, we can help make your design process simple and enjoyable. Explore ADU design ideas from our past projects below.
ADU Interiors
ADU Exteriors
Where should I start on my ADU?
There’s a lot to consider when building a granny flat and we want to make it easier for you. Clients come to us at all phases of their project: just starting out, ready to go and looking for an ADU builder, or somewhere in between. Choose a path below to get started on the content most relevant to you.
I'm new to the ADU thing
Wondering if an accessory dwelling unit makes sense for your property? Learn what you can build, what it may cost, and how the process works. Watch our ADU 101 webinar for a clear overview of ADU regulations, budgeting, and timelines in San Diego.
I'm considering options
Still thinking about guest home construction options? Not sure which route is best for you? Learn why an ADU design build general contractor offers unparalleled accountability and value when adding a granny flat to your house.
I'm ready to get started
Ready to get a proposal for an ADU? Comparing ADU contractors in San Diego? You’ve come to the right place. We will look at your property specifics and prepare a proposal to design, permit and build your accessory dwelling unit.
SnapADU: An ADU Builder Serving Greater San Diego
Where does SnapADU build? We are the largest ADU builder serving all of Greater San Diego, with active projects in coastal cities like Oceanside, Carlsbad, Encinitas, Del Mar, and Solana Beach, as well as inland communities such as Poway, San Marcos, Escondido, La Mesa, El Cajon, Vista, Chula Vista, Rancho Santa Fe, Santee, Lemon Grove, Imperial Beach, National City and surrounding areas of San Diego County.
How to find top ADU contractors near me?
Check our our list of what to look for in the best accessory dwelling unit companies. Understand different types of ADU firms & consider the top questions to ask each ADU building contractor you interview for your backyard home project.
Prefab vs. Stick-Built ADUs in San Diego
Should you choose stick-built or prefab? SnapADU specializes in traditional wood-framed construction, which offers superior customization for challenging lots, specific HOA requirements, or building larger or multiple units. Prefab ADUs can make sense for smaller builds on spacious, flat lots.
Choosing between prefab and stick-built depends on your site specifics, investment goals, and whether your project calls for a more customized design. Read more in our guide to prefab ADUs.
Watch our ADU 101 Webinar
Thinking about building a secondary dwelling unit and want to learn more about the whole process? We’d love to help make sure you know exactly how it all works in our on-demand webinar led by SnapADU co-founder, Whitney Hill. Learn the top insights from an experienced ADU construction company in San Diego.
FAQs
What can SnapADU do for me?
SnapADU can streamline your ADU building process by being an all-in-one team from start to finish. We have a proven, technology-driven approach that simplifies the design and build process, making it seamless and stress-free for clients.
What types of ADUs do you build?
At SnapADU, we specialize in new construction detached ADUs, including backyard cottages, guest houses, two-story carriage houses, ADUs with accessory structures or garages, and multiple units.
Based in San Diego, we are equipped to bring your vision to life. See our ADU designs or ADU floor plans pages for more details on the types of ADUs we can build for you.
Are SnapADU builds pre-built or modular?
No. Accessory dwelling units by SnapADU are wood-framed construction. They’re built much the same way that traditional homes are, with slab-on-grade foundations and on-site framing. This approach offers more customization for constrained lots or matching the ADU exterior to the main home.
How much will my ADU cost, and how does pricing work?
We provide full transparency before the project starts so you are aware and comfortable with the budget. Before permits are submitted, we provide a fixed-price model so you fully understand the process and pricing.
See our ADU Costs page for a detailed breakdown of the factors that will impact your ADU build.
How can you tell if my property is allowed to support an ADU?
This is part of our extensive feasibility review. We analyze the zoning of your land, local ordinances, and the conditions of your property to be certain that you’ll be allowed to build your ADU.
Our Feasibility SnapShot analyzes 75+ variables to provide pricing and timeline expectations before a project begins.
Can you help with permits?
Yes! Our team handles every aspect of your ADU build from start to finish. Unlike other companies that might only specialize in certain areas, we are a committed team that handles the entire project, including planning, permitting, and construction.
Do you provide warranties?
Yes, Snap ADU provides the following warranties:
- 1-year workmanship warranty for the fit, finish, and materials
- 2-year distribution systems warranty on mechanical, electrical, and plumbing (MEP) systems. Includes solar systems.
- 10-year structural warranty covering structural defects.
SnapADU is highly responsive to warranty claims; if a customer calls two years later about their water heater, they can expect a response within a business day.
More on SnapADU warranty.
How is SnapADU different from other ADU builders?
SnapADU has built more ADUs in Greater San Diego than any other single ADU contractor; more than 100 completed projects. While only about 30% of all the ADUs planned in San Diego are finished, SnapADU projects have a 90%+ completion rate because we focus on feasibility first.
We are customer-centric and committed to educating our clients throughout the entire process. We’ll take care of everything from the start of design to the day your ADU is move-in ready. We’re also the largest woman-owned ADU builder in California.