Fast, Reliable Home Additions & ADU Across West Hollywood
Home additions and ADU construction in West Hollywood typically run $45,000-$130,000 for room additions and $90,000-$220,000 for detached units, with most projects requiring 8-14 weeks from permit approval to final inspection. We’re Groundwork Construction Co. of South Florida, and our Home Additions & ADU team works regularly in the 33021 ZIP - from the single-story CBS homes near Stirling Road down to the canal-adjacent neighborhoods off North 72nd Avenue. Because West Hollywood sits in unincorporated Broward County, we pull every permit through the county’s Building Division rather than a city hall, and we’ve built that workflow into our project timelines so you’re not caught off guard by inspection scheduling or hurricane-hardening reviews. Call (844) 665-0162 for a free estimate - we’ll walk your property and flag the county-specific requirements before we ever break ground.
Why Groundwork Construction Co. of South Florida Is West Hollywood’s Preferred Home Additions & ADU Company
We’ve been building in Broward County long enough to know that West Hollywood isn’t Hollywood - and the difference matters when permits hit the county desk. Our crews understand the unincorporated permitting pathway, the HVHZ (High-Velocity Hurricane Zone) compliance triggers, and the dewatering realities that come with working near Broward’s canal network.
Raymond Estevez leads our field operations with a simple standard: every addition must be built to spec, not to convenience. That means you choose from our 50+ brand partnerships - whether it’s Andersen windows, James Hardie siding, or a prefab ADU from Mighty Buildings or Boxabl - and we handle the build, the county inspections, and the coordination. No handoffs to mystery subcontractors. No proprietary products you can’t research.
Our response time to West Hollywood is typically same-day for consultations, and we maintain active permits in the Broward County system so we’re not learning the process at your expense. On a recent garage conversion near North 61st Avenue, we added two weeks to the timeline upfront for county hurricane-hardening review - and passed inspection the first time because we’d planned for it.
Our Home Additions & ADU Services in West Hollywood
ADU Design & Permitting
Every ADU in West Hollywood starts with Broward County’s Building Division, and that’s where most out-of-area contractors stumble. We prepare county-compliant drawings, handle the HVHZ structural calculations, and submit for the mandatory hurricane-hardening compliance review that virtually every 1950s-1960s CBS home triggers. Our design process accounts for the high water table and canal proximity that can require dewatering plans even for modest ground-level work. A typical ADU permit submission in West Hollywood runs $90,000-$220,000 all-in, depending on size, utility connections, and whether you choose stick-built or prefab construction from partners like Plant Prefab or Tuff Shed.
Garage Conversion ADU
Garage conversions are the fastest path to rental income or multigenerational housing in West Hollywood, but they come with county-specific wrinkles. The original concrete slab often needs moisture mitigation. The existing electrical panel is frequently undersized for a dwelling unit. And Broward County requires HVHZ-rated windows and doors, which rules out reusing original jalousie windows. On a 1960s CBS home on North 61st Avenue, we uncovered rotting sole plates and corroded fasteners when converting the carport into an ADU. We sourced part-for-part replacements from the county’s approved HVHZ window list, upgraded the undersized panel, and pulled the permit through Broward County’s office - adding two weeks but ensuring the unit survived the next code inspection. Typical garage conversions in West Hollywood run $30,000-$80,000.
New Detached ADU
Detached ADUs give you maximum flexibility - rental income, home office, aging-in-place quarters - but in West Hollywood’s dense 33021 neighborhoods, setback requirements and utility trenching get tight. We assess your lot coverage, identify the shortest path for sewer and electrical tie-ins, and determine early whether prefab delivery from Boxabl or Mighty Buildings beats stick-built on your site. The canal-adjacent lots near South New River Canal often need dewatering for foundation work, which we flag in the first site visit rather than mid-excavation. Detached units typically fall in the $90,000-$220,000 range, with prefab options sometimes compressing the build schedule by 4-6 weeks.
Junior ADU & Interior Conversion
Junior ADUs - converted interior spaces with their own entrance but shared utility systems - work well in West Hollywood’s smaller CBS homes where a full detached unit won’t fit. We focus on reconfiguring existing square footage: splitting a large 1960s ranch layout, adding a kitchenette, and creating a separate entrance that meets egress requirements. The challenge is always the original electrical and the uninsulated block walls, which Broward County now wants brought up to current energy and hurricane standards. We handle the permitting, the structural review, and the material selection from our curated brand roster so the finished space doesn’t feel like an afterthought. Interior conversions typically start around $45,000 and scale based on plumbing and HVAC complexity.
What happens when you call
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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 don’t lock you into one manufacturer. Our ADU and addition projects draw from 50+ recognized brands across every category - Andersen, Pella, and CGI for impact-rated windows; James Hardie for siding that meets HVHZ standards; Cambria and Silestone for kitchen and bath surfaces; and prefab partners including Mighty Buildings, Boxabl, and Plant Prefab for clients who want a faster build path. We maintain relationships with local suppliers so materials aren’t sitting on backorder while your county permit is active. You choose the brand that fits your budget and taste. We handle the build.
Common Home Additions & ADU Problems We See in West Hollywood Homes
- Underestimating Broward County permit lead times. Contractors used to Hollywood’s municipal building department walk into the county system unprepared, miss required notice boards, and stall projects for weeks. We build county-specific timelines from day one.
- Skipping hurricane-hardening compliance on older CBS walls and roofs. The 1950s-1960s construction in 33021 predates post-Andrew code overhauls, so virtually any significant addition triggers mandatory HVHZ review. Avoiding it means failed inspections and costly rework.
- Neglecting dewatering on ground-level additions. South Florida’s high water table and the canal network threading through Broward County mean excavation pits fill fast. We’ve seen dangerous site conditions and schedule-killing flooding on jobs that skipped this step.
- Reusing original jalousie windows and non-impact doors. They don’t meet current county standards for dwelling units, and swapping them mid-project adds cost and delay. We identify this in the design phase, not during final inspection.
Pricing for Home Additions & ADU in West Hollywood, FL
Here’s what we’re seeing for West Hollywood’s market in 2024-2025. These ranges reflect county-specific requirements, HVHZ material upgrades, and the dewatering contingencies that come with local site conditions:
| Project Type | Typical Range in West Hollywood |
|---|---|
| Home Addition (average range) | $45,000-$130,000 |
| ADU Construction (typical range) | $90,000-$220,000 |
| Garage Conversion (typical range) | $30,000-$80,000 |
What moves you within these ranges? Size and complexity first. A 400-square-foot junior ADU with shared utilities sits at the lower end; a 750-square-foot detached unit with full kitchen, independent HVAC, and sewer tie-in pushes toward the top. Material selection matters - Cambria countertops versus basic laminate, Andersen A-series versus builder-grade vinyl windows. Site conditions matter more in West Hollywood than most places: dewatering adds cost, as does bringing a 1960s electrical panel up to code. We don’t guess. We walk your property, assess the county’s specific requirements for your address, and give you a line-item estimate - free, no obligation. Call (844) 665-0162 to schedule.
We Also Serve Cities Near West Hollywood
Our crews work across Broward and Miami-Dade counties, and we hold active familiarity with the permitting systems in neighboring jurisdictions. We regularly build Home Additions & ADU in West Hollywood and nearby Hollywood, Andover, Miramar, and West Park - each with its own building department workflow, which we adjust for on every project. Whether you’re in unincorporated Broward or across the line into an incorporated city, the process stays smooth because we’ve done the homework.
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
West Hollywood is unincorporated Broward County, so permits route through the county’s Building Division rather than Hollywood’s municipal department. The county system handles a larger jurisdiction with more complex review queues, and West Hollywood’s older housing stock triggers mandatory hurricane-hardening compliance reviews that add a review cycle. Call (844) 665-0162 and we’ll explain how we build that timeline into your project schedule from the start.
Probably yes, if your excavation goes below grade. South Florida’s high water table and the canal network near many 33021 homes mean groundwater intrusion is common even for modest foundation work. Broward County will flag this during plan review if it’s obvious, but we’ve seen projects stall when contractors discover water mid-dig. We assess dewatering needs during our first site visit. Call (844) 665-0162 for a free evaluation.
Broward County requires HVHZ-rated windows and doors, proper anchoring of roof-to-wall connections, and in many cases, upgraded garage door assemblies if the ADU shares a roofline with the existing structure. The original 1950s-1960s construction predates these standards, so virtually any significant addition triggers compliance. We source from the county’s approved product list and engineer the connections to pass inspection the first time.
Broward County’s zoning for unincorporated areas typically requires replacement parking if you eliminate an existing garage space, either through a new carport, driveway extension, or covered parking elsewhere on the lot. We evaluate your setback and lot coverage during design to find a compliant solution that preserves your vehicle storage. Every site is different - call (844) 665-0162 and we’ll measure yours.
Plan review for an ADU in Broward County typically runs 4-6 weeks for initial comments, with another 2-4 weeks for resubmittal and approval if the first round is clean. Hurricane-hardening review can add a cycle. We front-load the documentation - structural calculations, HVHZ product approvals, energy compliance - to minimize back-and-forth. Our goal is one round of comments, not three.
Ready to expand what’s possible on your West Hollywood property? Call Groundwork Construction Co. of South Florida at (844) 665-0162 for a free, on-site estimate. We’ll walk your home, flag the county-specific requirements, and show you material options from our 50+ brand partnerships - built to spec, not to convenience.
Written by Raymond Estevez, Owner at Groundwork Construction Co. of South Florida, serving West Hollywood and Broward County.