Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across West Hollywood
A home addition or ADU in West Hollywood typically runs $45,000-$130,000 for an addition and $90,000-$220,000 for a new detached ADU, with garage conversions landing between $30,000 and $80,000. Those numbers reflect the reality of building on dense, zero-lot-line lots under West Hollywood’s own building department, not LADBS. We know that world, because we work in it every week. If you’re weighing a garage conversion off Norton Avenue or a second story on a courtyard bungalow, call (877) 610-1318 and we’ll walk the lot with you before you spend a dime.
Why Barrett & Sons Construction Is West Hollywood’s Preferred Home Additions & ADU Company
Barrett & Sons is not a franchise. Tom Barrett founded this company in 1998, and his sons run the crews. When you call about a Home Additions & ADU project in West Hollywood, you’ll talk to a live person, not a call center. Tom publishes his name, address, and license number. Look it up. You’ll find it, and you’ll find us answering our own phone.
West Hollywood customers keep calling us back for one reason above all: every permit gets pulled, every inspection gets signed, and every price change arrives as a written change order before work proceeds. That matters more here than almost anywhere else in South Florida’s building landscape, because West Hollywood runs its own plan-check queue and its own inspectors. A contractor who treats West Hollywood like just another LA zip code stalls at first submittal. We don’t, because we maintain a dedicated relationship with city staff and their specific enforcement priorities.
We come to West Hollywood prepared for tight lots, shared walls, tuck-under parking, and rent-controlled tenants. That’s the job. The estimate is free, and the second opinion on any written estimate is free too.
Our Home Additions & ADU Services in West Hollywood
ADU Design & Permitting
West Hollywood runs its own plan-check queue under its own building department, and the Rent Stabilization Ordinance adds tenant-habitability rules no neighboring city enforces the same way. We handle the full design and permitting path: survey, soils where the hillside-adjacent clay demands it, structural drawings, and submittal to the city’s plan checker, not LADBS. Our drawings reflect what West Hollywood’s reviewers actually flag. That’s the difference between a permit in two months and a permit in nine.
Garage Conversion ADU
Most garage conversions in West Hollywood happen inside 1950s-1960s dingbat buildings with tuck-under parking. That means load-bearing rim joists, shared utilities, and often a mandatory soft-story retrofit that runs on the city’s timeline, not yours. We sequence the work so your conversion doesn’t stall behind a retrofit inspector’s window. On a Norton Avenue dingbat, we shored the rim joist, ran dust containment for the tenant above, and coordinated rough-in inspections around the retrofit schedule. The city’s building official signed the final, not an LA inspector.
New Detached ADU
A detached ADU in West Hollywood almost always means building on a zero-lot-line or near-zero-lot-line lot. Staging, materials access, and a concrete pump all have to fit without blocking an alley or a neighbor’s driveway. We plan site logistics before we quote, because access is part of the price. Detached ADUs here run $90,000-$220,000 depending on foundation conditions, utility runs, and whether soils engineering is triggered by the expansive clay common on northern lots near the hills.
Junior ADU & Interior Conversion
A junior ADU carved out of existing square footage is often the fastest path to rentable space in West Hollywood, especially in courtyard bungalow complexes where the footprint can’t grow. We convert underused living areas, storage rooms, and attached garages into code-compliant JADUs. West Hollywood’s RSO rules affect habitability requirements, egress, and sometimes tenant relocation, so we treat every interior conversion as a legal project, not a weekend remodel.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in West Hollywood
We install windows and doors from PGT, CGI, and Simonton on our West Hollywood additions and ADUs. These are brands you can look up, with impact ratings and structural data sheets that matter when a building inspector in West Hollywood asks about wind load or egress window sizing. We order direct from suppliers who stock for South Florida’s climate, so lead times stay predictable even when the plan checker adds a revision.
Common Home Additions & ADU Problems We See in West Hollywood Homes
- Assuming LADBS permits cover the job. West Hollywood has its own plan-check queue, its own inspectors, and its own tenant-habitability rules. Drawings prepared for LADBS stall at first submittal here, and every week of stall is a week of carrying costs.
- Starting demo on a shared wall or tuck-under structure without a party-wall notice. The RSO gives rent-controlled tenants rights that trigger stop-work orders when habitability plans aren’t filed. We file them before we swing a hammer.
- Underestimating access and staging. Zero-lot-line lots leave no room for materials, a dumpster, or a concrete pump. If the logistics aren’t in the quote, the change order will be.
- Foundation surprises on hillside-adjacent clay. West Hollywood’s near-zero summer rainfall shrinks expansive clay, then winter rain makes it heave. Slab additions and ADU foundations on the northern lots often need soils engineering, which changes the permit path and the price.
Pricing for Home Additions & ADU in West Hollywood, FL
West Hollywood pricing reflects density, access, and the city’s own permitting overhead. Here’s what we quote across the market:
| Project Type | Typical Range in West Hollywood |
|---|---|
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
| Home Addition | $45,000-$130,000 |
A 400-square-foot garage conversion in a dingbat off Santa Monica Boulevard will land differently than a 750-square-foot detached ADU behind a courtyard bungalow near Melrose. Access, foundation work, utility runs, and whether the soft-story retrofit triggers all move the number. We write every allowance and every change order on paper before work starts. Call (877) 610-1318 for a written, line-item quote on your specific lot.
We Also Serve Cities Near West Hollywood
Our crews cover West Hollywood and the surrounding communities, including Hollywood, Andover, Miramar, and West Park. If you’re just outside the city line, give us a call. We’ll tell you honestly whether your lot falls under West Hollywood’s building department or a neighboring jurisdiction, and what that means for your permit path.
Serving West Hollywood, FL - Our Local Coverage Area
We’re based in the West Hollywood 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 - Home Additions & ADU in West Hollywood
Yes. A garage conversion ADU in a 1950s dingbat with tuck-under parking requires a West Hollywood building permit, and if the building triggers the city’s mandatory soft-story retrofit, that work runs concurrently with yours. We handle the full permit path through West Hollywood’s own plan-check queue and inspectors. Call (877) 610-1318 to get the process started.
Often yes, but it depends on lot coverage, setback rules, and whether the bungalow complex has shared walls or designated historic status. Courtyard lots are typically tight, so we survey and plan site logistics before quoting. A detached ADU in West Hollywood runs $90,000-$220,000. Schedule a free estimate at (877) 610-1318.
They set the construction window. West Hollywood enforces its noise ordinance strictly, and rent-controlled properties add habitability requirements that limit early-morning and late-evening work. We post the work-hour schedule, run dust containment where tenants are in place, and round inspections into the allowed hours. It keeps the job moving without the stop-work order.
Most Junior ADU permits in West Hollywood clear plan check in two to five months once drawings are submitted, assuming the property isn’t caught in a soft-story retrofit queue or a historic overlay review. We’ll give you a written estimate of the timeline at your first walkthrough, and every revision gets a written change order. For an exact quote on your property, call (877) 610-1318.
On the hillside-adjacent lots north of Santa Monica Boulevard, often yes. The expansive clay shrinks in the dry summer months and heaves when winter rain returns, which stresses slabs and can trigger soils engineering requirements for any ground-disturbing permit. We include soils analysis in our design scope when the lot history warrants it. Call (877) 610-1318 for a written assessment of your foundation path.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving West Hollywood since 1998.