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 Florida City
Adding square footage to a Florida City home usually costs between $45,000 and $130,000, and the permit process here is unlike anywhere else in the country. You can’t just frame out a new room and call it done. Every window, door, roof tie, and exterior wall assembly has to pass Miami-Dade’s High Velocity Hurricane Zone review, which means a Notice of Acceptance number on materials before the inspector will even look at your project. We’ve been pulling permits in Florida City long enough to know exactly which products clear that desk on the first submission and which ones send the job back for weeks. Call (877) 610-1318 and we’ll walk your property with you, no charge, before you spend a dime.
Tom Barrett founded this company in 1998, and we still answer our own phone. That matters in Florida City because the work here runs on details most out-of-town outfits never learn until they’re standing at the permit counter with the wrong paperwork.
Why Barrett & Sons Construction Is Florida City’s Preferred Home Additions & ADU Company
We earn most of our Florida City work from neighbors who watched us build across the street. Tom’s sons run the crews, and they’re on-site most days, not checking in from a regional office. When a homeowner on Palm Drive calls about a foundation question, the person who answers has actually poured footings in that soil. When someone near the Everglades edge asks how we handle the water table during slab prep, we can explain it because we’ve done it.
Our local reputation in Florida City rests on three things: written change orders before any scope shift, permits pulled and inspections signed on every eligible job, and a 90-Day Done Right Promise printed on the contract. If something isn’t right, one call brings Tom back. No fine print, no phone tree, no out-of-state call center.
We’re the Home Additions & ADU team you can actually verify. Tom Barrett publishes his name, his address, and his license number. Look it up before you sign anything. We’d rather you check first and call second than the other way around.
Our Home Additions & ADU Services in Florida City
ADU Design & Permitting
An accessory dwelling unit in Florida City starts with a real conversation about your lot, your setbacks, and what the HVHZ code will allow. We handle drawings, structural calculations, and the Miami-Dade permit package as one turnkey scope. That means one crew manages the schedule instead of a homeowner chasing three subconsultants. Most Florida City ADU permits take longer than the construction itself, so we front-load the paperwork and keep the build moving behind it.
Garage Conversion ADU
Converting an existing garage in Florida City typically runs $30,000 to $80,000 depending on whether the slab can stay, how much electrical rework is needed, and whether the original block walls meet current wind-load standards. Many of these garages were built before the 1992 Andrew rebuild, which means we often find missing strap-and-clip connections at the top plate. That’s not a reason to walk away. It’s a reason to get the scope in writing before the first hammer swings.
New Detached ADU
Building a new detached ADU on a Florida City lot means accepting that the water table is often just inches under your boots. We compact the fill, design the slab with proper vapor barriers, and specify fasteners rated for the salt air coming off Biscayne Bay. A detached ADU in Florida City generally lands between $90,000 and $220,000, and the final number depends heavily on impact-rated window packages and how much site work the lot requires.
Junior ADU & Interior Conversion
If you have an attached bonus room, an underused laundry wing, or a den with its own exterior door, a junior ADU can work without the full site-prep headache. These interior conversions in Florida City often cost $45,000 to $100,000 and move faster because the roof and walls already exist. The catch is that any new window or door opening still has to carry an NOA rating, and we handle that on your behalf before materials get ordered.
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 Florida City
When your addition includes a patio, walkway, or driveway apron, we install Techo-Bloc and Cambridge pavers because they hold up to Florida City’s wet-dry cycles without spalling the way cheap box-store pavers do. For site prep and footing work, we use Quikrete products spec’d for high-moisture subgrades. These are materials you can look up and verify, not mystery brands off a van, and they’re stocked close enough that a reorder doesn’t stall a Florida City job for two weeks.
Common Home Additions & ADU Problems We See in Florida City Homes
- Pre-Andrew framing that fails the strap-and-clip check. Homes built before 1992 in Florida City occasionally surface during renovations with roof-to-wall connections that don’t meet current HVHZ code. The inspector will flag it, and it has to be fixed before we can close up the new addition.
- High water table turning a simple footing into a dewatering job. Florida City sits at the southern edge of the Miami-Dade mainland, flanked by Everglades wetlands. Dig down a foot or two and you might find water. We plan for it instead of discovering it mid-excavation.
- Salt air eating standard fasteners. The combination of Biscayne Bay exposure and Everglades humidity corrodes cheap connectors faster here than almost anywhere else in the state. We specify stainless or hot-dipped galvanized hardware on exterior assemblies as a matter of routine.
- Windows ordered from out of state that fail the NOA check. A supplier ships a Florida-code-approved impact window, but it lacks a Miami-Dade Notice of Acceptance. The permit counter rejects it. We’ve seen this stall projects for weeks, and we verify every product number before it ships to Florida City.
Pricing for Home Additions & ADU in Florida City, FL
A full home addition in Florida City lands between $45,000 and $130,000. A new detached ADU runs $90,000 to $220,000. A garage conversion typically falls between $30,000 and $80,000. Those numbers include permits, inspections, and the materials needed to pass HVHZ review, but they shift with square footage, site conditions, and the finish level you choose.
What won’t shift on our jobs is the number after the work starts. Every allowance, every scope change, every unexpected condition comes to you as a written change order before we proceed. If it isn’t on paper, it isn’t a surprise waiting for a date. Call (877) 610-1318 to schedule a free estimate, and we’ll give you a line-item price you can take to the bank or compare against any other contractor in Florida City.
We Also Serve Cities Near Florida City
Our crews work throughout southern Miami-Dade, including Homestead, Leisure City, Naranja, and Princeton. If you’re just over the line in any of those communities, the same Florida City pricing and permit expertise applies. We also handle Kitchen Remodeling in Florida City and Bathroom Remodeling in Florida City when your addition project grows into a full interior rework.
Serving Florida City, FL - Our Local Coverage Area
We’re based in the Florida City 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 Florida City
A home addition in Florida City typically costs $45,000 to $130,000, depending on square footage, site prep, and whether the existing structure needs code-compliance upgrades before the new space ties in. We provide free written estimates with line-item pricing so you know exactly where every dollar goes before you sign. Call (877) 610-1318 to schedule yours.
The ADU permit process in Florida City typically takes longer than the construction itself due to Miami-Dade’s HVHZ product-approval requirements and plan review backlog. We front-load drawings, structural calculations, and NOA documentation to cut weeks out of the timeline, and we keep you posted at every step. Call (877) 610-1318 and we’ll give you a realistic schedule for your specific lot.
Yes, you need permits for any garage conversion in Florida City, and skipping them creates a liability that follows the property into every future sale and insurance renewal. Unpermitted work gets flagged during inspections and can force tear-out and rebuild at your expense. We pull permits and schedule inspections on every eligible job because the inspector works for you, not for us.
Prices in Florida City reflect the cost of materials that actually pass HVHZ review, so yes, some line items run higher here than in counties that don’t require Notices of Acceptance. The difference buys you a roof and windows that are engineered for a Category 5 event, not a sticker on a box. Call (877) 610-1318 for a written quote that shows exactly where the money goes.
Yes, every completed job in Florida City carries our 90-Day Done Right Promise, written on the contract, not buried in fine print. If something isn’t right, one call brings Tom Barrett back to make it right. That’s the same guarantee we’ve offered since 1998, and it applies to every addition and ADU we build in Florida City.
Get Your Free Florida City Estimate Today
If you’re thinking about adding a room, converting a garage, or building an ADU in Florida City, call us before you sign anything. We’ll walk the property, listen to what you actually need, and give you a written number with no trip charge inside the county. Call (877) 610-1318 to schedule your free estimate.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Florida City and southern Miami-Dade since 1998.