A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Manhattan Beach, CA
ADU construction in Manhattan Beach runs $180,000 to $450,000 for a backyard unit, while garage conversions typically land between $95,000 and $175,000 before permit fees. The beach climate, hillside lots, and a planning department that reviews every setback and height limit closely make Manhattan Beach one of the more involved cities in the South Bay for accessory dwelling units. Fielding ADU Builders handles the full scope, from permit drawings to final inspection. Call (361) 315-4177 if you want a written price before any work starts.
Why Manhattan Beach Homes Are Different
Manhattan Beach lots are tight, and many sit on slopes where the garage sits below the living floor or the rear yard drops away from the house. That topography changes how an ADU gets anchored, how drainage is routed, and whether the city requires additional soils work. Marine air accelerates corrosion on exposed steel, so we specify fasteners, flashing, and hardware rated for coastal exposure. The housing stock is a mix of compact 1940s beach cottages in the Tree Section, larger Hill Section homes with view corridors to protect, and newer builds in the Sand Section east of The Strand. Junipero Avenue, Manhattan Beach Boulevard, and Highland Avenue define the main commercial cuts through the city, but the residential streets are the ones that shape ADU design, since many are narrow and some lack full alley access.
The city requires owner-occupancy for some ADU permits and reviews height, setback, and floor-area-ratio closely. Manhattan Beach is its own jurisdiction, separate from Los Angeles County, so planning rules here do not match what applies a few blocks away in Hermosa Beach or El Segundo. Crews working in the Sand Section deal with limited staging room and neighbors close enough to hear a nail gun. In the Tree Section, mature root systems often affect where foundation lines can run. None of this is unusual for us, but it is why a Manhattan Beach ADU should not be priced like a project in a flat inland city.
Our Main Manhattan Beach Services
Manhattan Beach homeowners most often call us for a room addition, a garage conversion, or a full backyard ADU. Each has its own page with local pricing and the specific permit realities in Manhattan Beach.
Room Addition Contractor in Manhattan Beach
A room addition in Manhattan Beach usually means going out, up, or both, and either direction triggers the city’s setback and height review. Second-story additions in the Sand Section and Tree Section often need to hold a specific roof line so the mass of the house does not overwhelm the lot. We handle plans, structural changes, coastal-rated materials, and the permit file from first submittal to final sign-off. The Garrison Code applies here the same as on an ADU: show up in the window, price in writing, by the book, leave it clean, stand behind it for a year. Read the full scope and local pricing on our Room Addition Contractor in Manhattan Beach page.
Garage Conversion Contractor in Manhattan Beach
Garage conversions are the fastest path to extra square footage in Manhattan Beach, but only if the garage can meet the city’s current habitability rules for ceiling height, ventilation, and emergency egress. Many older beach-area garages were built as utility space, not living space, and need slab, electrical, and insulation upgrades before the city will sign off. We price the conversion honestly and put every line item in writing before work starts. If the city requires a variance to convert a garage that sits tight to the property line, we handle the submittal. See the full breakdown on our Garage Conversion Contractor in Manhattan Beach page.
ADU Builders in Manhattan Beach
A detached ADU in Manhattan Beach is a bigger project than most people expect, because the city reviews it like new residential construction. Foundation, utility connections, stormwater, and fire separation from the main house all get checked at plan review and again at inspection. We build with conventional framing and James Hardie siding, or with panelized and modular systems from Abodu, Cover, and Dvele when the lot and budget favor that route. The written quote covers what we found in the field, not just what blueprints show. Ground-up ADU pricing, design options, and the Manhattan Beach permit sequence are on our ADU Builders in Manhattan Beach page.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Manhattan Beach
We build with James Hardie siding and work with prefab and modular ADU platforms including Abodu, Cover, and Dvele when a Manhattan Beach job benefits from off-site construction. Parts and panel orders are coordinated through our local supply network, so inspection-ready delivery runs on schedule. See the full range on our brands page.
Pricing for ADU Company in Manhattan Beach, CA
| Service | Typical range in Manhattan Beach |
|---|---|
| Studio ADU (400 sq ft) | $150,000 – $210,000 |
| One-bedroom ADU (500 – 600 sq ft) | $175,000 – $240,000 |
| Two-bedroom ADU (700 – 800 sq ft) | $210,000 – $310,000 |
| Three-bedroom ADU (900 – 1,000 sq ft) | $275,000 – $380,000 |
| Prefab/panelized ADU (delivery + site work) | $180,000 – $340,000 |
| Garage conversion (single-car) | $95,000 – $135,000 |
| Garage conversion (two-car) | $120,000 – $175,000 |
| Room addition (ground-floor, 200 – 300 sq ft) | $90,000 – $155,000 |
| Room addition (second-story, 300 – 400 sq ft) | $130,000 – $210,000 |
| Permit and plan set (city fees + drawings) | $6,000 – $16,000 |
Hill Section lots with slope work, view-corridor restrictions, or deep foundation requirements push pricing toward the top of each range. In the Sand Section, tight access can add time and labor to materials handling. Whatever the variables, the price we put in writing before work starts is the price you pay at the end.
Neighborhoods We Serve in Manhattan Beach
We work throughout Manhattan Beach, from The Strand up through the Sand Section and Tree Section to the Hill Section. Crews are on local jobs most weeks, and a free estimate visit usually happens within a few business days of your call.
- Sand Section
- Tree Section
- Hill Section
- The Strand
- East Manhattan Beach
Service Area – Cities Near Manhattan Beach
Our Manhattan Beach crews also take ADU, garage conversion, and room addition work in the neighboring South Bay cities. If your property sits close to the line, call and we will confirm coverage. We serve Hermosa Beach, CA, El Segundo, CA, Lawndale, CA, and Hawthorne, CA.
Serving Manhattan Beach, CA - Our Local Coverage Area
We’re based in the Manhattan Beach area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About ADU Company in Manhattan Beach
We typically schedule the free estimate within a few business days, and the Manhattan Beach permit review usually takes longer than anything on our end. A realistic start-from-signing window is eight to fourteen weeks once the city issues the permit. Call (361) 315-4177 to get your project on the schedule.
We do. The full plan set, structural details, and all submittals to the city go through us, and we correct whatever the Manhattan Beach planner flags. You never chase the permit counter or resubmit paperwork on your own. Call (361) 315-4177 and we will walk you through the exact submittal path.
Yes. We work in the Sand Section, Tree Section, Hill Section, and everywhere in between. There is no neighborhood in Manhattan Beach we will not price. A live person answers the phone around the clock, so call (361) 315-4177 and we will get your estimate scheduled.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Manhattan Beach Customers Say
"Room addition over the back patio. Framing is square, windows are tight, and the roofline matches."
- Danny L."Foundation and slab poured on schedule. Crew kept the yard orderly."
- Marian J."Garage conversion with a new bath and kitchenette. Permit was handled by them. Inspection passed first time."
- Sheila B.
