Professional ADU Builder Near You
H&A My Design is a licensed ADU builder and design-build general contractor, family-owned and operated for more than 20 years, with design, permits and construction handled by one in-house team and a 5,000 sq ft showroom in Canoga Park. Serving Southern California and the surrounding areas.
Licensed & bonded California general contractor — CSLB #999603. Complimentary on-site property audit before any commitment.
Why Work With An ADU Builder That Also Designs
An accessory dwelling unit is a complete, independent home on the same lot as your main house — its own kitchen, bathroom, entrance and sleeping area. It can house parents, give an adult child a start, earn rental income or become a proper home office. What it cannot do is survive a disconnected process, which is why choosing the right ADU builder matters more than choosing the right floor plan.
The Five Kinds Of ADU We Build
Every property suits a different route. Part of our free property audit is telling you honestly which one fits your lot, your budget and your goals.
Detached And Attached Units
A detached ADU is a separate backyard home. An attached ADU shares a wall with the main house while keeping its own entrance.
Conversions And Second Storeys
A garage conversion ADU reuses an existing structure, and a second-story ADU builds above a garage to keep the yard free.
California Law Is On Your Side
State legislation now allows accessory dwelling units on most residential lots, with limits on how restrictive local rules can be. The California Department of Housing and Community Development publishes the current state guidance, and local departments apply it alongside their own standards.
- Most single-family lots can accommodate at least one ADU
- Detached units can generally reach up to 1,200 sq ft under state law
- Garage conversions usually avoid new setback requirements
- Local agencies must review complete ADU applications within a set time limit
- Local zoning, utilities and site conditions still decide what is practical
ADU Services From A Trusted ADU Builder
Every stage and every type of accessory dwelling unit has its own decisions. Each page below covers one of them in depth, with straight answers instead of sales copy.
Expert ADU Construction
Foundations, framing, utilities, inspections and finishes, sequenced and built by one accountable team.
Premier Detached ADUs
A fully separate backyard home with its own entrance, privacy and the highest rental and resale appeal.
Attached ADUs
An independent unit sharing a wall with the main house, often simpler on utilities and site work.
Affordable Garage Conversion ADUs
Turning an existing garage into a legal, comfortable home — usually the fastest route to a new unit.
Second-Story ADUs
Building above the garage to add a home without giving up the backyard.
Professional ADU Design and Planning
Layouts, zoning checks and budgets settled before drawings are commissioned.
ADU Permits Handled For You
Submittals, plan-check corrections and inspections managed from start to finish.
ADU Cost and Planning
What really drives the price of an ADU, and why we never publish fake menu pricing.
ADU Blueprint Offer
Qualifying ADU projects receive their initial blueprints and Title 24 packet credited back.
ADU FAQs
Honest answers on size limits, timelines, permits, costs and renting out your unit.
How Our ADU Builder Process Works
Six stages, each with a clear end point and a decision you approve before the next begins.
Free Property Audit
We visit the lot and check zoning, setbacks, utility runs, access and soil conditions before recommending any type of unit.
Design & Fixed Proposal
Plan options arrive with a property-specific proposal instead of a generic square-foot price.
Blueprints & Engineering
Architectural drawings, structural engineering and Title 24 energy documents coordinated into one permit set.
Permits & Plan Check
We submit, answer corrections and secure approval from the department that reviews your address.
Construction
Site work, foundation, framing, utilities, inspections and finishes delivered to a published schedule.
Final Inspection & Keys
Punch list, final sign-off, warranty documents and a unit ready to live in or rent.
The Best ADU Builder Is The One That Owns Every Stage
Plenty of companies can draw an ADU and plenty can build one. Fewer can do both under one contract without passing the problem to someone else.
Licensed, bonded and verifiable
We hold California licence CSLB #999603. Check it yourself — and check any ADU builder you are considering.
Property-specific pricing, never fake menu prices
Utility distances, soil, setbacks and finish choices decide the real cost. You receive a fixed proposal after the on-site audit.
Design, permits and construction in one contract
No gap between the people who draw your unit and the people who build it.
A real showroom
Cabinetry, tile, flooring and fixtures chosen in person at our 5,000 sq ft Canoga Park showroom.
Family-owned for over 20 years
The same people answer the phone before, during and after your project.
What Decides Your ADU Budget And Timeline
Two identical floor plans can cost very different amounts on two different lots. These are the factors any honest ADU builder should explain before quoting.
Utilities And Site Conditions
Distance to the sewer connection, electrical panel capacity, gas and water service, soil conditions and access for equipment move the number more than square footage alone.
Why We Audit First
A trench that runs sixty feet instead of fifteen, or a panel that needs upgrading, is a real cost. Finding it on day one is planning; finding it mid-build is a change order.
Type And Size Of Unit
A garage conversion reuses an existing shell; a detached unit needs a new foundation and roof; a second-story unit adds structural work above an existing building. Each route carries a different cost profile.
Finish Level
Kitchens and bathrooms carry the highest cost per square foot. Choosing finishes in the showroom early keeps the budget honest and the schedule intact.
- Cabinetry and countertop selections
- Flooring, tile and plumbing fixtures
- Windows, doors and exterior cladding
Jurisdiction And Timeline
Permit review times vary by city, and ADU applications in Los Angeles go through LADBS while other cities run their own departments. As a guide, we typically see garage conversions take three to five months to build and ground-up detached units five to eight months, depending on size and site.
ADU Projects We Have Built
Completed accessory dwelling units delivered by our own team across Southern California.
Find Out What Your Lot Can Hold
Send us your address. We will check what kind of ADU your property allows, what it is likely to involve and which approvals apply — before you spend anything on drawings.
Questions People Ask An ADU Builder
Many more answers live on our ADU FAQs page.
Can I build an ADU on my property?
Most residential properties in California can accommodate an ADU under state law. We confirm it for your specific lot during a complimentary on-site audit, checking setbacks, easements and utility connections.
Which type of ADU is right for me?
It depends on your lot, your budget and how you plan to use the unit. A garage conversion is usually the fastest route, a detached unit offers the most privacy, and a second-story unit keeps the yard. We compare them honestly during the audit.
How much does an ADU cost near me?
We do not publish menu pricing because it would mislead you. Utility distances, soil, setbacks and finish selections determine the true cost, and you receive a fixed, property-specific proposal after the audit. See ADU cost and planning.
Do you handle design and permits too?
Yes. As a design-build ADU builder we handle architectural drawings, structural engineering, Title 24 energy documents, permit submittals and construction under one contract.
Can I rent out my ADU?
In most cases yes, subject to local rules on short-term rentals and occupancy. We explain what applies at your address during planning.
Which areas do you serve?
We build ADUs throughout Los Angeles, the San Fernando Valley, Sherman Oaks, Encino, Tarzana, Woodland Hills, Calabasas, Westlake, Pasadena, Glendale, Culver City, the South Bay, Santa Clarita Valley, Ventura County, Thousand Oaks, Beverly Hills, West Hollywood, Santa Monica, Malibu, Agoura Hills, Simi Valley, Burbank, Granada Hills, Canoga Park, Reseda and the surrounding areas.
Related Services
ADUs are one part of what we do. These are the sections homeowners most often look at next.
New Construction
Ground-up homes designed, permitted and built by one team.
Homeowner Experiences
Hear directly from Southern California clients who trusted H&A My Design with their custom homes, ADUs, and additions.
Walk the finished home — navy kitchen with brass fittings, an open living space and a new double-vanity bathroom.
“We’re extremely happy with the results. Without a shadow of doubt, we’ve already recommended them to other neighbors.”
“Everybody was phenomenal to work with, a pleasure to have. Totally fair and wonderful company and great family.”
“H&A made the entire process transparent. Having one GC manage blueprints, city permits, and the build was night and day.”
“Their Canoga Park showroom made selecting our cabinets, quartz, and fixtures so easy. Finished right on schedule.”
“Converted our garage into a 2-bedroom rental. Flawless craftsmanship and leased immediately after final inspection.”
See the full before and after — the original kitchen, the opened-up living space and the finished bathrooms.
“From 3D plans to final city sign-off, H&A handled everything. No surprise change orders, no stress.”
“Built a modern ADU for my parents. The accessibility and aesthetic details exceeded all our expectations.”
Serving Southern California
Licensed throughout Los Angeles & Ventura Counties. HQ Showroom at 6723 Variel Ave, Canoga Park, CA.
MORE SPACE.
MORE VALUE.
Design, permits, showroom selections, and master construction—managed by one accountable team.