Junior ADU & Interior Conversion in West Hollywood: Scope, Timeline, and What It Costs
A Junior ADU & Interior Conversion in West Hollywood transforms an existing bedroom, den, or attached living space into a self-contained unit with its own kitchenette, bathroom, and separate entrance, typically running $45,000-$130,000 and taking 10-16 weeks from permit to final inspection. Unlike a detached ADU build, this project works within your home’s current footprint, which keeps the budget lower but demands careful navigation of Broward County’s unincorporated permitting path. Call (844) 665-0162 and we’ll walk your space, flag the structural and utility constraints, and give you a written estimate with no obligation.
How We Approach a Junior ADU & Interior Conversion in West Hollywood
Every Junior ADU & Interior Conversion follows five distinct stages. Homeowners who understand the sequence make faster decisions, and faster decisions keep the County inspection schedule from slipping.
Stage 1: Feasibility and as-built documentation (Week 1)
We measure every wall, locate load-bearing elements, and photograph the existing electrical panel, plumbing stacks, and HVAC trunk lines. In West Hollywood’s 1950s-1960s CBS homes, we almost always find the electrical service undersized for an additional kitchenette and the original terrazzo floors sitting on a thin slab with no moisture barrier. You’ll decide at this stage whether to upgrade the main panel now or cap the unit’s load with gas cooking and a tankless water heater. This stage takes 3-5 days and produces the as-built drawings that feed into permit documents.
Stage 2: Design and permit submission (Weeks 2-4)
Because West Hollywood sits in unincorporated Broward County, your permit routes through the County Building Division rather than a city hall. We submit structural, electrical, plumbing, and energy-compliance packages together to avoid the partial-review delays that trap out-of-area crews. You’ll choose your kitchenette layout (galley vs. L-shape), bathroom configuration (wet bath vs. separate shower), and whether to add a separate meter for water or stay on the main. County review typically runs 10-14 business days for interior conversions, longer if hurricane-hardening triggers a secondary structural check.
Stage 3: Rough construction and MEP rough-in (Weeks 5-8)
Demolition is surgical: we remove only what’s necessary to run new supply lines, drain lines, and dedicated circuits through the slab or attic. In CBS construction, that often means core-drilling block walls for plumbing vents or running conduit along interior furring strips. You’ll inspect the rough framing, confirm outlet and switch locations, and sign off on the kitchenette appliance rough-ins before we close walls. This is the stage where relocating a toilet drain by six feet adds $2,500-$4,000 versus keeping the existing stack location.
Stage 4: Finish installation and fixture set (Weeks 9-13)
Cabinets, countertops, tile, flooring, and trim go in once mechanical, electrical, and plumbing pass rough inspection. We coordinate two to three County inspections during this window: insulation and air barrier, electrical and plumbing finish, and a final comprehensive. You’ll make your final material selections here, or better, lock them during Stage 2 so long-lead items aren’t holding up the schedule.
Stage 5: Final inspection and certificate of completion (Weeks 14-16)
County inspectors verify egress window sizing, GFCI/AFCI protection, ventilation rates, and fire separation between the Junior ADU and primary residence. We correct any punch-list items, hand over manuals and warranty cards, and close the permit. The unit is now legally rentable or occupiable by family.
The Decisions That Shape Your Junior ADU & Interior Conversion
These are the real choices that move your budget and your daily experience of the space:
- Kitchenette scope: A wet bar with mini-fridge and microwave drawer runs $3,500-$6,000. A full two-burner cooktop, under-counter fridge, and single-bowl sink with disposal pushes to $8,000-$14,000. We spec Silestone or Caesarstone for countertops when the owner plans to rent the unit, since quartz resists tenant wear better than laminate or solid surface.
- Bathroom configuration: A wet bath (toilet, sink, and shower in one waterproof room) saves 15-20 square feet and $4,000-$7,000 in framing and tile labor. A separate shower with glass enclosure demands more space but rents at a premium and suits long-term occupancy.
- Separate entrance: Cutting a new door through CBS block with a lintel and impact-rated assembly costs $4,500-$8,500 in West Hollywood, including the mandatory High-Velocity Hurricane Zone hardware. Using an existing interior door to a covered porch or breezeway can eliminate this entirely.
- Utility independence: Staying on the home’s main electrical panel and water meter avoids utility company work and keeps costs down. A separate meter adds $3,000-$6,500 in utility fees and electrician time but simplifies rental accounting and may help with future appraisal.
- Flooring over terrazzo: Many West Hollywood homes have original terrazzo in excellent structural condition. We can polish and seal it ($800-$1,800), overlay with luxury vinyl plank ($2,500-$5,000), or tile ($3,500-$7,500). Polished terrazzo is nearly indestructible and reads as premium to tenants; LVP is warmer underfoot and faster to install.
- Plumbing stack location: Keeping the bathroom and kitchenette on the same wall as the existing drain stack avoids jackhammering the slab and running new lines under the foundation. Moving the stack across the unit adds $2,500-$5,000 and typically triggers a flood test that costs another inspection cycle.
These choices aren’t good or bad. They’re trade-offs between first cost, rental income potential, and how the space feels to live in. We map each option to your specific floor plan before you sign anything.
What Junior ADU & Interior Conversion Costs in West Hollywood, FL
Junior ADU & Interior Conversion in West Hollywood typically ranges from $45,000 to $130,000. Here’s what pushes a project toward the low or high end of that span:
| Cost Driver | Low-End Scenario | High-End Scenario |
|---|---|---|
| Existing space size and condition | 400 sq. ft. bedroom with good bones, no structural changes | 600+ sq. ft. with load-bearing wall removal, beam installation |
| Plumbing and electrical | Kitchenette and bath on existing stack, panel has capacity | New subpanel, relocated drains, gas line extension |
| Material grade | Stock cabinetry, LVP flooring, fiberglass shower | Custom cabinets, stone counters, tile wet room, Kohler or Moen fixtures |
| Separate entrance and egress | Existing door to exterior, window meets egress | New impact door cut through CBS block, enlarged egress window |
| Permit scope and compliance | Standard interior conversion, no structural triggers | Hurricane-hardening review, energy compliance modeling, fire-separation upgrades |
A written estimate from us includes demolition, rough and finish carpentry, electrical and plumbing rough-in and finish, insulation, drywall, paint, flooring, cabinets, countertops, fixtures, and permit fees. It does not include appliance packages, window treatments, furniture, or utility company fees for separate meter installation. We itemize each line so you can phase work if needed. Call (844) 665-0162 for an exact quote on your space - estimates are free and include the feasibility review.
What West Hollywood’s Housing Stock and Permitting Reality Means for This Job
West Hollywood isn’t incorporated, and that single fact reshapes how a Junior ADU & Interior Conversion moves from idea to occupancy. Your permit sits with the Broward County Building Division, not a city hall three blocks away. The inspectors are thorough, the scheduling system is centralized, and crews who don’t know the workflow - who expect to walk into a municipal office and pull a same-day permit - lose days figuring out online portals and notice-board requirements.
The homes we convert here, mostly in the 33021 ZIP, were built fast during the 1950s and 1960s South Florida boom. Concrete block walls, flat or low-slope roofs, jalousie windows, and terrazzo floors are the norm. When we open walls for a Junior ADU & Interior Conversion, we regularly find uninsulated block, cloth-wrapped wiring, and plumbing vents that don’t meet current slope or diameter requirements. The County doesn’t grandfather any of this when the permit triggers a “substantial improvement” review, which most conversions do. That means the new electrical circuits must be AFCI-protected, the exterior door must be impact-rated, and any roof penetration for a bathroom vent must meet High-Velocity Hurricane Zone nailing and sealing standards.
The humidity and UV here are relentless. We spec exterior-grade fasteners and sealants on every penetration, and we don’t install wood-framed exterior assemblies without pressure-treated lumber and capillary breaks. A crew from Orlando or Tampa might not build that way by reflex. We do, because we’ve seen what happens to a West Hollywood conversion when the details aren’t matched to the climate.
Homeowners in this area often pair a Junior ADU & Interior Conversion with a Kitchen Design & Layout in West Hollywood refresh for the main house, or start with a Small & Partial Kitchen Remodels in West Hollywood to test the working relationship before committing to the full ADU scope. Either way, the same team carries both projects.
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.
Frequently Asked - Junior ADU & Interior Conversion in West Hollywood
Most projects run 10-16 weeks from signed contract to final County inspection, with 3-4 weeks of that in permit review. Delays usually come from homeowner decision lag on cabinet or tile selections, not from our crew. Lock your finishes by Week 3 and we stay on the critical path. Call (844) 665-0162 to schedule a feasibility walk-through and get a timeline for your specific space.
Yes, and it routes through the Broward County Building Division, not a city office. Any conversion adding a kitchenette and separate bathroom triggers electrical, plumbing, and structural permits, plus energy compliance. The County also reviews for hurricane-hardening on most 1950s-1960s homes. We handle the full submission, but you should budget 10-14 business days for review after documents are complete.
Sometimes. If your target space already has a bathroom or sits directly above the kitchen drain stack, you may keep all plumbing in place and avoid slab work. The more common scenario in West Hollywood’s single-story CBS homes is that the best conversion space - a back bedroom or former Florida room - needs at least one wet wall relocated and the electrical panel upgraded. We map both paths during the feasibility review.
The lowest-cost viable path is converting an existing bedroom with an adjacent bathroom, keeping the kitchenette minimal (mini-fridge, microwave, no cooktop), and using the home’s main utilities without separate metering. That configuration can land near $45,000 if the electrical panel has spare capacity and no structural walls move. Every addition - cooking capability, separate entrance, upgraded finishes - layers cost on top. We quote both the minimum viable unit and the version you’d want to live in yourself.
We warranty our workmanship for one year from final inspection, and every material we install carries its own manufacturer warranty - cabinetry, fixtures, countertops, flooring, each with its own term and claim process. We register warranties in your name where the manufacturer allows, and we keep permit and inspection records on file for as long as you own the home. For warranty specifics on any brand we quote, ask during the estimate walk-through.
Start With a Free On-Site Estimate for Your Junior ADU & Interior Conversion in West Hollywood
We’ll walk your space, identify the load-bearing walls and utility constraints, explain what Broward County will require for your specific address, and hand you an itemized estimate before we leave. No deposit, no pressure. Call (844) 665-0162 or request a visit online. Most West Hollywood homeowners know within an hour whether the project fits their timeline and budget.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving West Hollywood and South Florida since our founding. Junior ADU & Interior Conversion is one project type within our full Home Additions & ADU capability; when your project grows into a Home Additions & ADU in West Hollywood scope, the same crew and accountability carries through.