ADU Builders in Hermosa Beach CA
ADU Builders | Hermosa Beach CA | Garage Conversion & Home Addition Contractors
Looking for a licensed ADU builder in Hermosa Beach, CA? EZ ADU Builders CA designs, permits, and constructs accessory dwelling units, garage conversions, backyard cottages, and home additions for Hermosa Beach homeowners. Our fixed-price design-build model means a single contract, a single team, and a single timeline from feasibility to final inspection.
Why Hermosa Beach homeowners choose EZ ADU Builders CA
Hermosa Beach homeowners trust us because we specialize exclusively in ADUs across Los Angeles County. We know the local plan-check process, neighborhood architectural patterns, lot challenges, and utility tie-in requirements that make every Hermosa Beach project unique.
Whether you want to convert a garage in Hermosa Beach into a permitted rental, add a backyard cottage for family, or build a brand-new detached ADU for long-term value, we have the local experience and California licensing to deliver it on time and on budget.
Building an ADU in Hermosa Beach
Hermosa Beach is a dense, beloved beach city where homes sit on some of the smallest lots in the county — narrow parcels, often just a few thousand square feet, with multi-story houses built close together to capture ocean air and views. Yards are minimal, alleys serve many blocks, and every square foot of land is precious.
On lots this tight, ADU projects in Hermosa Beach are exercises in precision. Garage conversions are the most practical path for many properties, and where new construction is possible, compact footprints and vertical design make the most of limited space. We plan these projects carefully around access, neighboring structures, and the realities of building on a small beach-city lot. Walk-street parcels and hill sections each present their own access considerations, which we plan for upfront.
ADU services we offer in Hermosa Beach
Complete ADU & home addition services
From garage conversions to fully detached new builds, we design, permit, and construct every type of accessory dwelling unit in Los Angeles County.
ADU Design Build
Full design-build ADU services from architectural plans to keys-in-hand construction in Los Angeles.
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Detached ADU
New-construction detached ADUs up to 1,200 sq ft built on your Los Angeles property.
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Prefab ADU
Factory-built modular ADUs delivered and installed in weeks, not months.
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Tiny House with Garage
Compact ADUs paired with attached garage or carport — ideal for narrow LA lots.
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Tiny Office
Backyard office studios for remote work, podcasting, or creative practice.
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Backyard Cottage
Charming backyard cottages designed for rental income or extended family.
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In-law Suite
Attached and Junior ADUs for parents, grandparents, or adult children.
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Garage Conversion
Convert your existing garage into a fully permitted living space or rental unit.
Learn moreAnswers for Los Angeles homeowners
Common questions about ADU costs, permits, and timelines.
213-816-6012How much does an ADU cost in Los Angeles?+
ADU construction in Los Angeles ranges from $90,000 for a basic garage conversion to $450,000+ for a custom-built detached 1,200 sq ft ADU. Most of our clients invest between $180,000 and $300,000 for a turnkey project including permits, design, and finishes.
How long does it take to build an ADU?+
A typical detached ADU takes 6–9 months from permit submittal to final inspection. Garage conversions are faster — usually 3–4 months. Prefab ADUs can be installed in as little as 8 weeks once site prep and permits are complete.
Do I need a permit to build an ADU in Los Angeles?+
Yes. All ADUs require a permit from LADBS or your local city building department. State law makes the approval process ministerial — meaning if your plans meet code, the city must approve them. We handle the entire permit process for you.
Can I rent out my ADU?+
Yes. California state law allows you to rent your ADU long-term (30+ days). Short-term rentals like Airbnb depend on your local city ordinance — Los Angeles has additional restrictions.
Will an ADU increase my property taxes?+
Only the newly built ADU is reassessed. Your existing home keeps its current Prop 13 tax basis. Most homeowners see a tax increase of $1,500–$3,500 per year, depending on the ADU's assessed value.
What's the difference between an ADU and a Junior ADU (JADU)?+
A JADU is a unit up to 500 sq ft created within the walls of your existing home, with its own entrance and kitchenette. ADUs can be detached, attached, or converted and up to 1,200 sq ft.
Can I add an ADU to my small Hermosa Beach lot?+
Often, yes — most commonly as a garage conversion or a compact unit designed for a tight footprint. A site review measures your parcel and access so we can show you what genuinely fits before design begins.
How do you build on a narrow beach-city lot?+
Carefully. Tight sites need planning for material delivery, equipment access, and neighbor relations. We have built on constrained lots across the county and plan logistics as part of the project, not as an afterthought.
Trusted by Los Angeles homeowners
"EZ ADU Builders turned our old garage into a beautiful 1-bedroom rental in under four months. The team handled every permit and we never had to chase them. Already paying our mortgage with rental income."
"We needed an in-law suite for my mother. The crew was respectful, on-time, and the quality is incredible. Best decision we made for our family."
"Built a 900 sq ft detached ADU in our backyard. The design-build process was painless — fixed price, clear timeline, no surprises. Highly recommend."
"Professional from day one. Permits took longer than expected (city's fault, not theirs) but EZ ADU stayed on top of everything. The finished cottage looks like a magazine cover."
"Backyard office for my therapy practice — sound insulated, beautifully finished, permitted. Completed in 9 weeks. Worth every penny."
"Prefab ADU installed in our backyard. The set day was incredible to watch and we were move-in ready six weeks later. Top notch communication throughout."
EZ ADU Builders CA — serving Hermosa Beach
Request your free ADU consultation
Tell us about your lot and goals. We'll respond within one business day with next steps and a rough budget range.
- 213-816-6012
- Mon–Sat 8:00 AM – 7:00 PM
- 527 W 7th St, Los Angeles, CA 90014
ADU builders serving all of Los Angeles County
We build ADUs, convert garages, and design home additions in every incorporated city in LA County. Find your city below.