ADU in Huntington Beach - Design, Permits and Build Under One Contract
We handle the design, the engineering, and the city permit, then build it. One contract, one crew, one accountable point of contact. Free feasibility check on your lot before you commit.
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Our ADU Services
From initial design and city permitting to garage conversions, new detached builds, junior ADUs, and full site prep - we handle every phase of your ADU project under one trusted roof.
ADU Design & Permitting
Professional adu design & permitting service. Licensed & insured with a satisfaction guarantee on every job.
ExploreGarage Conversion ADU
Professional garage conversion adu service. Licensed & insured with a satisfaction guarantee on every job.
ExploreNew Detached ADU
Professional new detached adu service. Licensed & insured with a satisfaction guarantee on every job.
ExploreJunior ADU & Interior Conversion
Professional junior adu & interior conversion service. Licensed & insured with a satisfaction guarantee on every job.
ExploreADU Site Prep & Utilities
Professional adu site prep & utilities service. Licensed & insured with a satisfaction guarantee on every job.
ExploreOur Work in Huntington Beach
A look at recent adu projects across Huntington Beach and surrounding areas.
We Build ADUs for Neighbors We Know
We're not a big-box contractor that parachutes into your zip code - we're a Southern California team that has spent years working in Huntington Beach neighborhoods, earning the trust of homeowners street by street. We understand the local design aesthetic, the city's planning department, and the things that matter most to families here on the coast.
That community connection means your project is handled by people who care about the outcome personally. When we finish an ADU on your block, we're proud to drive past it for years to come - and that pride shows in every board, every finish, and every conversation we have with you.
Meet Our Team
One Team From Blueprint to Keys
Juggling separate architects, permit expediters, general contractors, and subcontractors is stressful and expensive. Our integrated approach means a single accountable team manages your ADU from the first sketch through the final city sign-off - eliminating the gaps where projects go over budget and over schedule.
Huntington Beach homeowners choose us because they want clarity, not chaos. We give you a realistic timeline, honest budget conversations, and a process that respects your time, your property, and your household during construction.
See How It Works
What Homeowners Say
Projects across Huntington Beach and surrounding communities.
"The rental income has covered the payment since the second month. They were realistic about the numbers rather than optimistic."
"Handled the whole planning process. We went to one hearing and that was it."
"They walked us through setbacks and utility capacity before we paid anything, and told us one of our two options was not going to get approved."
"The permit set and the build were one contract with one number. Our neighbours used two firms and spent a year watching them blame each other."
Your ADU Journey, Step by Step
We guide Huntington Beach homeowners through every stage with clear communication, local expertise, and craftsmanship you can be proud of for decades.
Free Site Consultation
We visit your Huntington Beach property, walk the lot with you, and listen to your goals - no pressure, just honest conversation about what's possible.
Feasibility & Zoning Review
Our team reviews your parcel against Huntington Beach municipal code and California ADU law to confirm setbacks, allowable square footage, and utility requirements before a dollar is spent on design.
Custom ADU Design
Our designers create floor plans and elevations tailored to your property and lifestyle, balancing curb appeal, interior livability, and budget - and we refine until you love it.
Permit Submittal & City Coordination
We prepare and submit a complete permit package to the City of Huntington Beach and manage all correspondence, corrections, and approvals so you never have to navigate bureaucracy alone.
Site Prep & Utility Planning
Once permits are in hand, we coordinate grading, drainage, and utility connections - gas, water, electrical, and sewer - to set a rock-solid foundation for your new ADU.
Construction & Framing
Our skilled craftsmen break ground and build your ADU with quality materials and meticulous attention to detail, keeping the jobsite clean and your neighbors respected throughout.
Inspections & Quality Milestones
We schedule and pass every required city inspection - framing, rough mechanical, insulation, and final - keeping your project on code and on schedule at every milestone.
Final Walkthrough & Handover
We walk the finished ADU with you, address any punch-list items, and hand you the keys along with all warranty documentation - ready for family, guests, or rental.
The Standard of Quality We Bring to Every ADU
Every ADU we build in Huntington Beach is measured against six dimensions of excellence that protect your investment and make daily life better.
Permit-Ready Drawings
Our design documents are thorough and code-compliant the first time, minimizing city correction cycles and keeping your timeline intact.
Thoughtful Space Planning
We design ADUs that live larger than their footprint - smart layouts, natural light, and storage that make every square foot feel intentional.
Quality Material Selection
We source durable, low-maintenance finishes suited to Southern California's coastal climate, so your ADU looks great and requires less upkeep over time.
Skilled Trade Craftsmanship
Our crews are experienced ADU specialists, not generalist laborers - your project benefits from hands that have solved every ADU construction challenge before.
Utility & Drainage Expertise
Proper water, sewer, and stormwater planning prevents costly problems down the road; we engineer these systems thoughtfully from day one.
Transparent Project Management
You receive regular progress updates, clear change-order communication, and a dedicated point of contact from groundbreaking to final inspection.
Why Huntington Beach Builds With Us
Four reasons Huntington Beach homeowners choose us for the most significant addition they'll ever make to their property.
Deep Local Roots
We know Huntington Beach's neighborhoods, permitting office, and coastal design sensibility - giving your project an insider advantage from day one.
Permit Expertise You Can Rely On
California ADU law is complex and city requirements shift regularly. Our team stays current so your permits move forward without avoidable delays or surprises.
Relationship-First Approach
We treat every homeowner as a long-term neighbor, not a transaction - clear communication, honest timelines, and craftsmanship we're proud to put our name on.
End-to-End Accountability
From design through construction and final inspection, one dedicated team owns your project - no finger-pointing between separate contractors when challenges arise.
Frequently Asked Questions
Honest answers to the questions every Huntington Beach homeowner asks before starting their ADU project.
Let's Talk About What's Possible on Your Property
A free, no-pressure site consultation is the best first step - we'll walk your property together, answer every question you have, and give you an honest picture of your ADU options in Huntington Beach.
(562) 263-3350Request Your Free ADU Consultation
Tell us a little about your property and goals, and our Huntington Beach ADU team will be in touch within one business day.
ADU Service Across the Huntington Beach Area
We Are the Huntington Beach Team for Ellery.
Ellery was founded in 2015, the year California's ADU law changed and the permitting queue became the actual product. It is a design-build studio rather than a contractor: the drawings, the permit set and the build are one contract with one price, because the ADU projects that go wrong are almost always the ones where the designer and the builder can each blame the other.
Same training, same parts, same pricing practice, and the same 365-Day Done Right Promise - delivered by people who live here.
Visit Ellery →Part of the Haven Family.
Haven is a family of home-service brands held to one written standard, and Ellery is the adu company in it. One promise stands behind every trade, in every town.