Junior ADU & Interior Conversion in Andover, FL: Scope, Timeline, and Cost
A junior ADU and interior conversion in Andover turns an existing portion of your home, typically a master suite or attached living area, into a self-contained unit with its own kitchenette, bathroom, and separate entrance. Most projects we handle in the 33023 area run 8 to 14 weeks from permit approval to final inspection, with costs ranging from $45,000 to $130,000 depending on structural work and finish level. Call (844) 665-0162 and we’ll walk your property to give you a written estimate with real numbers.
How We Approach Junior ADU & Interior Conversion Step by Step
Every junior ADU and interior conversion in Andover follows a five-stage sequence. Homeowners who understand the rhythm of the work make faster decisions, and faster decisions keep the timeline intact.
Stage 1: Feasibility and zoning review (1-2 weeks). We measure your existing footprint, verify setback and parking requirements with Broward County, and determine whether your property qualifies under Florida’s updated ADU statutes. You’ll decide at this stage whether you want a full kitchen or a kitchenette, whether the entrance faces the street or the side yard, and whether you’re adding a separate meter for utilities. These choices ripple through every later stage, so we don’t rush them.
Stage 2: Design and permit drawings (3-5 weeks). Our drafting team produces plans that satisfy Broward County’s HVHZ structural requirements and the Florida Building Code. Because Andover’s 1950s-1970s CBS homes often lack original structural documentation, we frequently need to field-verify roof-to-wall connections and foundation capacity. You’ll sign off on fixture locations, electrical panel routing, and whether we’re matching existing terrazzo or switching to new flooring.
Stage 3: Structural and MEP rough-in (3-4 weeks). Demolition is limited to interior partitions in most junior ADU conversions, but we sometimes need to cut concrete slab for new plumbing drains or upgrade electrical service from 100-amp to 200-amp. This is when the water table reality hits: at 2-5 feet below grade in South Broward, any slab penetration demands immediate dewatering and rapid backfill. We coordinate inspections for framing, electrical, and plumbing rough-in before closing walls.
Stage 4: Insulation, drywall, and finishes (2-3 weeks). Impact-rated windows and exterior doors go in now, and every product must carry a Miami-Dade or Florida Product Approval number valid for HVHZ use. Inspectors check labels on-site. You’ll make final selections on tile, cabinetry hardware, paint sheen, and whether the kitchenette gets a 24-inch or 30-inch cooktop. We install moisture-resistant drywall in bathrooms and kitchen areas given the local humidity load.
Stage 5: Final inspection and certificate of occupancy (1-2 weeks). Broward County conducts a thorough final walkthrough: egress window operation, GFCI protection, smoke detector interconnection, and structural strap verification. We don’t hand over keys until the C.O. is recorded. Most homeowners use this buffer to arrange separate metering with Florida Power & Light if that’s part of their plan.
The Choices That Shape Your Junior ADU & Interior Conversion
Every decision below moves your final number and how the space functions for the next twenty years.
- Kitchenette versus full kitchen: A kitchenette with a mini-fridge, two-burner cooktop, and single-bowl sink runs $3,500-$7,000 in cabinetry and fixtures. A full kitchen with full-size appliances, custom cabinets, and stone counters pushes $12,000-$25,000. For rental income, the full kitchen commands higher rent; for aging-in-place family use, the kitchenette often suffices.
- Plumbing routing: If your existing bathroom backs up to the proposed ADU space, we can often tie into existing drains with minimal slab work. Relocating a wet wall to the opposite side of the house adds $4,000-$8,000 in concrete cutting, repiping, and inspection sequencing.
- Separate entrance placement: A side-yard door through an existing window opening costs roughly $2,500-$4,500 including impact-rated door, frame, and HVHZ hardware. Cutting new block for a street-facing entrance with stucco match and lintel reinforcement runs $6,000-$11,000.
- Electrical service upgrade: Many Andover homes still run 100-amp panels. Adding a second kitchen, independent HVAC, and laundry requires 200-amp service, which means a new panel, utility coordination, and roughly $3,500-$6,500.
- Flooring continuity: Original terrazzo can be restored and extended if the substrate matches; that’s $8-$14 per square foot. New tile or LVP runs $6-$12 installed but creates a visual break that some homeowners dislike in an otherwise unified home.
Homeowners often pair a junior ADU and interior conversion with a refreshed main kitchen, so if you’re considering a full Kitchen Design & Layout in Andover or a targeted Small & Partial Kitchen Remodels in Andover, we can sequence both projects under one contract and one timeline.
What Junior ADU & Interior Conversion Costs in Andover, FL
| Cost Component | Typical Range |
|---|---|
| Base junior ADU & interior conversion | $45,000 - $130,000 |
| Kitchenette (mini appliances, stock cabinets) | $3,500 - $7,000 |
| Full kitchen (full appliances, custom cabinets, stone counters) | $12,000 - $25,000 |
| Separate entrance (side yard, window conversion) | $2,500 - $4,500 |
| Separate entrance (new block cut, street-facing) | $6,000 - $11,000 |
| Electrical service upgrade (100A to 200A) | $3,500 - $6,500 |
| Plumbing relocation (wet wall move) | $4,000 - $8,000 |
Five variables push your project to the low or high end of that $45,000-$130,000 range. Size is obvious: a 400-square-foot master suite conversion costs less than a 700-square-foot multi-room reconfiguration. Existing condition matters more in Andover than in newer markets; a 1960s CBS home with original galvanized plumbing, ungrounded outlets, and no hurricane straps requires layered upgrades that a 1990s build doesn’t. Relocating plumbing or structural walls adds concrete and steel work. Material grade separates a rental-grade finish from an owner-suite level with Silestone or Caesarstone counters and Kohler or Moen fixtures. Finally, permit scope: a simple interior alteration with no exterior changes moves through Broward County faster and cheaper than one requiring new windows, doors, and separate utility metering.
Our written estimates itemize labor, materials, permits, and a contingency line for concealed conditions. They do not include FPL connection fees, separate water meter installation, or HOA architectural review fees, which we flag during feasibility so you’re not surprised.
Why Andover Homes Make This Job Different
Andover sits within ZIP 33023 in Broward County, one of Florida’s High-Velocity Hurricane Zone jurisdictions. Every junior ADU and interior conversion here must meet wind-load and product-approval standards stricter than almost anywhere else in the country. The neighborhood’s concentration of 1950s-1970s concrete block homes means we routinely open walls to find no hurricane clips at the roof-to-wall connection, original terrazzo over slab with no moisture barrier, and electrical panels that predate GFCI requirements.
That legacy housing stock changes the job in concrete ways. When we pull a permit for a junior ADU and interior conversion in Andover, inspectors will verify that any new or modified opening, whether a separate entrance door or an enlarged egress window, carries a Miami-Dade or Florida Product Approval number rated for HVHZ use. We’ve seen out-of-county crews source impact windows approved for Orlando or Tampa that failed inspection here. The water table, running just 2-5 feet below grade across much of South Broward, means any slab cutting for plumbing drains demands active dewatering; skip it and you’ll have standing water in your new bathroom subfloor before tile goes down.
Many Andover homes also still run on 100-amp electrical service with cloth-insulated branch wiring in the walls. A junior ADU with independent HVAC, kitchen appliances, and laundry can’t safely draw from that legacy system. We budget for the upgrade early rather than discover it mid-rough-in. The payoff is a unit that passes inspection the first time and holds value in a market where code compliance is non-negotiable.
This work is part of our broader Home Additions & ADU in Andover capability. If you’re comparing a junior ADU against a full addition or detached unit, our Home Additions & ADU crew can walk you through the trade-offs on footprint, rental income potential, and resale impact. We cover Andover and surrounding South Broward communities from our Fort Lauderdale base.
Serving Andover, FL - Our Local Coverage Area
We’re based in the Andover 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 Andover
Most projects run 8 to 14 weeks from permit approval to certificate of occupancy, with 3 to 5 weeks in design and permitting before construction starts. Broward County’s HVHZ inspection schedule adds a day or two per trade inspection compared to non-hurricane-zone jurisdictions. Call (844) 665-0162 and we’ll give you a timeline based on your specific property and scope.
Yes, absolutely. Any conversion creating a separate dwelling unit, even within your existing footprint, requires a building permit through Broward County and must comply with the Florida Building Code and local zoning for ADUs. We’ll handle the application, drawings, and inspection scheduling as part of our standard process.
Sometimes, if your existing layout already clusters a bathroom and kitchenette against shared wet walls. More often, Andover’s 1950s-1970s floor plans require at least partial plumbing relocation and one or two non-structural wall removals to create functional separation. We identify the minimal-intervention path during feasibility.
The lowest-cost path preserves existing plumbing locations, uses a kitchenette rather than full kitchen, skips the electrical upgrade by limiting appliance load, and retains your current flooring where possible. That typically lands in the $45,000-$65,000 range in Andover. Call (844) 665-0162 for an exact quote; estimates are free.
We warranty our workmanship for one year from certificate of occupancy, and all materials carry their manufacturer warranties, which range from 10 years on cabinetry to lifetime on some fixtures. We register warranties in your name and provide documentation at project closeout.
Get a Free On-Site Estimate for Your Junior ADU & Interior Conversion
We’ll walk your Andover property, verify feasibility against Broward County’s ADU and HVHZ requirements, and deliver a written estimate with itemized costs and a realistic timeline. No deposit required to schedule. Call (844) 665-0162 or request a visit through our site. Raymond Estevez and our team will show up on time, measure carefully, and give you numbers you can actually use.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving Andover and South Broward since our founding.