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 Richmond West
A home addition or ADU in Richmond West typically costs $45,000 to $130,000 for room additions and $90,000 to $220,000 for a detached ADU, depending on square footage, site conditions, and whether you’re in a home built before or after Hurricane Andrew changed the code book. That’s the honest range, and we’ll put it in writing before a single hammer swings. We’re working in Richmond West every week, from the quiet streets off SW 152nd Avenue to the newer sections near SW 200th Street, so we know what the ground does when you dig and what the wind demands when you build. Call Tom Barrett at (877) 610-1318 for a free estimate and a straight answer.
What most homeowners here don’t realize until they’re ankle-deep in a project is this: Richmond West sits on Miami oolitic limestone. Excavating for footings or utility trenches means jackhammering through solid rock, not moving soil. Contractors from other counties routinely underbid the excavation, then stall out when their equipment can’t handle the bedrock. We price for the rock from day one. The water table runs just two to three feet below grade in much of the area, which turns any foundation pour into a water-management job and puts your permit application under Miami-Dade’s drainage review. A contractor who’s never worked the western fringe of the county will learn both lessons on your dime. We already know them.
Why Barrett & Sons Construction Is Richmond West’s Preferred Home Additions & ADU Company
Tom Barrett founded this company in 1998, and his sons run crews across Richmond West now. That means the name on the truck matches the people on your property. When you call, a live person answers, day or night, and Tom publishes his name, address, and license number so you can look him up before you sign anything. Ask anyone on your street, or check the license yourself. We want you to.
Every job we do in Richmond West starts the same way: a written scope, written allowances, and a written change order before any change touches the job. No surprise invoices at the end. The 90-Day Done Right Promise is printed on the contract, not whispered in the sales pitch. If something’s not done right, one call brings Tom back.
We pull permits and schedule inspections on every eligible addition or ADU. The permit inspector works for you, not for me, and that’s exactly why I want him on the job. In a community where so many homes straddle the pre- and post-Andrew building code line, that inspection record matters more than most people realize.
Our Home Additions & ADU Services in Richmond West
Every addition we build in Richmond West falls under Miami-Dade’s High Velocity Hurricane Zone rules, the strictest wind-resistance standard in the country. That shapes everything, from the size of your window openings to the straps tying your new roof to the block walls. Here’s what we handle most often.
ADU Design & Permitting
An accessory dwelling unit in Richmond West requires navigating Miami-Dade’s specific ADU ordinance, impact-rated openings, and product approvals tested to 175-plus mph winds. We handle the drawings, the engineering, the permit package, and the inspections. Most homeowners don’t realize that county drainage review applies to even modest ADU site work, because of the high water table out here. We do.
Garage Conversion ADU
Converting a garage in a late-1980s CBS home is usually the most cost-effective ADU path in Richmond West, since the structure and slab already exist. But those pre-Andrew block homes often have roof tie-downs and opening protection that don’t meet current HVHZ code, so you’re not just adding drywall. You’re upgrading the shell. Expect $30,000 to $80,000 depending on how much remediation the original structure needs.
New Detached ADU
Building a detached ADU in Richmond West means excavating into limestone for the foundation, managing groundwater during every pour, and engineering the roof assembly for Miami-Dade’s wind loads. Budget $90,000 to $220,000. The limestone alone will add days to the schedule and dollars to the excavation line item. A firm that’s never jackhammered Miami Rock Ridge bedrock will discover it fast. We quote for it on purpose.
Junior ADU & Interior Conversion
A junior ADU, whether it’s a converted bonus room or a sectioned-off wing of the house, often sidesteps the heaviest site work. That makes it quicker and less disruptive for Richmond West homeowners who want rental income or space for an aging parent without tearing up the yard. We still pull the permit, still run the inspections, and still put every scope detail in writing.
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 Richmond West
For hardscape and outdoor work tied to your addition, we install Techo-Bloc and Cambridge Pavers products, materials you can look up and verify, not mystery brands off a van. If your addition includes a patio, driveway realignment, or walkway, we bring the same premium-brand discipline to the pavers that we bring to the framing and the roof. We keep sourcing local for Richmond West projects, which means fewer delivery delays during the June-to-October wet season when every contractor in the county is racing the weather.
Common Home Additions & ADU Problems We See in Richmond West Homes
- The pre-Andrew roof assembly. Homes built in the late 1980s and very early 1990s often have roof-to-wall connections that don’t meet current HVHZ uplift requirements. An addition that ties into the existing roofline forces the whole assembly up to code. That’s good for you and non-negotiable for the inspector.
- Limestone excavation surprises. The Miami Rock Ridge runs right under Richmond West. Every footing, plumbing trench, and slab prep means jackhammering bedrock. Contractors from Broward or farther north routinely underbid this line item, then present a change order once their equipment bounces off the rock. Our quotes include the rock work from the start.
- Water table intrusion during pours. With groundwater sitting two to three feet below grade, any excavation can fill with water overnight during the wet season. If the contractor skips proper dewatering, your new slab cures on a compromised base. We plan for dewatering on every foundation pour out here.
- Hurricane-hardening the opening. Every door and window added to a Richmond West home must meet impact-rated or shutter-protected standards under HVHZ rules. That’s a cost some bids conveniently leave out. Ours doesn’t. Impact-rated openings are in the line items where they belong.
Pricing for Home Additions & ADU in Richmond West, FL
Here’s a straight pricing view for Richmond West work. A room addition runs $45,000 to $130,000. A detached ADU lands at $90,000 to $220,000. A garage conversion typically costs $30,000 to $80,000. If your addition touches the kitchen, factor $14,000 to $45,000 for that scope, and a bathroom runs $9,000 to $28,000. What moves the number: the size of the addition, whether you’re in a pre- or post-Andrew structure, how much limestone excavation the site demands, and the level of impact-rated opening upgrades required. We give you a line-item written quote before work starts, and any change arrives as a written change order with a signature line, never as a surprise on the final invoice. Call (877) 610-1318 to schedule your free estimate. We won’t rush you, and we won’t pitch you.
We Also Serve Cities Near Richmond West
Our Home Additions & ADU team works throughout southern Miami-Dade, including South Miami Heights, East Perrine, Palmetto Estates, and West Perrine. If you’re in Richmond West proper or just across the boundary, the same crew and the same written-scope rules apply. And while we’re on your property, we’re glad to look at related work too, whether that’s Kitchen Remodeling in Richmond West or a Bathroom Remodeling in Richmond West that your addition might naturally connect to.
Serving Richmond West, FL - Our Local Coverage Area
We’re based in the Richmond West 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 Richmond West
Most Richmond West additions and ADUs move from signed contract to first excavation within three to six weeks, which accounts for permit submittal, Miami-Dade plan review, and scheduling around the wet season. The county’s HVHZ review adds a step that Broward contractors don’t face, which is another reason local familiarity matters. Call (877) 610-1318 for a realistic start date on your specific project.
Yes, we work across the entire 33177 ZIP code, from the established subdivisions near SW 152nd Avenue to the newer pockets further south and west. Each section of Richmond West has its own mix of pre- and post-Andrew housing stock, so the first thing we do on any site visit is determine which code generation governs your structure. That determination shapes the entire permit package.
It does, and it’s one of the most under-quoted line items in southern Miami-Dade. Excavating for footings, plumbing trenches, or a new slab in Richmond West means jackhammering through oolitic limestone bedrock rather than moving soil. We include the rock excavation in your written quote from the beginning, and we’ll show you the line item. Contractors who don’t are the ones who hand you a surprise change order after the jackhammer comes out.
Richmond West pricing runs close to South Miami Heights and East Perrine, with the limestone and high water table pushing excavation and dewatering costs slightly above what you’d see on higher, sandier ground elsewhere in the county. The HVHZ requirements apply countywide in Miami-Dade, so impact-rated openings and roof assemblies are constant across all these cities. Expect to pay for the rock and the water management out here. We’ll show you exactly how much.
Every job carries our 90-Day Done Right Promise, written on the contract. If something’s not done right, one call brings Tom Barrett back to make it right, no fine-print games. Beyond that, all permit work includes the inspection record you can pull up yourself. The inspector works for you, not for us, and that’s exactly how we like it.
If you’re weighing an addition, a garage conversion, or a detached ADU in Richmond West, the next step is a free estimate and a straight conversation about what your house, your ground, and the code will actually require. Call Tom Barrett at (877) 610-1318. You’ll get a live person, a written scope, and a price that won’t change without your signature on a change order first.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Richmond West and southern Miami-Dade since 1998.