Home/Areas We Serve/Huntington Beach
ADU builder in Huntington Beach, CA
In Huntington Beach, the first question is whether your property is in the California Coastal Zone, which covers much of the city. We check your parcel, then plan the permit path and design around it.
Coastal Orange County
Building an ADU in Huntington Beach.
What’s different about adding an ADU here, and how we plan around it.
Coastal Zone review
Properties in the Coastal Zone may need a coastal development permit and review under the city’s Local Coastal Program in addition to the standard ADU permit. State law still requires the city to allow ADUs there.
Multi-family lots are an opportunity
Huntington Beach approves coastal permits for ADUs on multi-family lots. In July 2026, for example, the city cleared two small two-story ADUs (about 420 and 480 sq ft, 18 ft tall) on a lot with an existing triplex. Since 2025, state law allows up to 8 detached ADUs on lots with existing multi-family buildings.
Strong rental demand
Beach-adjacent neighborhoods rent well year-round. Note that new ADUs must be rented for more than 30 days, and the city separately regulates short-term rentals.
Plans that fit
Floor plans that work within Huntington Beach’s rules.
These ready-to-build plans fit Huntington Beach’s size, height limits. Our studio can adjust any of them to your lot.
Plan 400A
Studio · 1 Bath · 400 ft²
Plan 484
1 Bed · 1 Bath · 484 ft²
Plan 500B
1 Bed · 1 Bath · 500 ft²
Plan 832
2 Bed · 1 Bath · 832 ft²
Plan 854
2 Bed · 2 Bath · 854 ft²
Plan 1000
3 Bed · 2 Bath · 1,000 ft²
How we work in Huntington Beach
One team from first visit to move-in.
01
Free ADU analysis
We review your Huntington Beach lot, what the local rules allow and which plans fit, with an estimated cost.
02
Design
Our in-house studio prepares construction-ready plans in about 1–2 months.
03
Permits
We submit to the City of Huntington Beach and handle every round of plan check.
04
Fixed-price build
Construction in about 4–5 months, managed by one project manager from our Long Beach office.
Huntington Beach ADU questions
Common questions in Huntington Beach.
Do I need a coastal permit for an ADU in Huntington Beach?
If your property is in the Coastal Zone, often yes: a coastal development permit is typically required alongside the building permit. Outside the zone, the standard ministerial ADU process applies.
Can I add ADUs to my Huntington Beach rental property?
Yes. Lots with an existing multi-family building can add detached ADUs (up to 8, and no more than the number of existing units) plus conversion ADUs, subject to Coastal Zone review where it applies.
Can I rent my Huntington Beach ADU on Airbnb?
New ADUs must be rented for terms longer than 30 days, and Huntington Beach separately regulates short-term rentals, so a new ADU is best planned as a long-term rental.
Nearby
We also build in
Start a Conversation
Planning an ADU in Huntington Beach?
Tell us about your Huntington Beach property and we’ll prepare a free ADU analysis: what fits on your lot, the rules that apply, recommended plans, estimated cost and timeline.
Subscribe to Our News
"*" indicates required fields
Serving homeowners throughout Los Angeles and Orange County.