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 Miami Gardens
A room addition or ADU in Miami Gardens typically runs $53,100-$153,400, and the permit process is unlike anywhere else in Florida. Miami Gardens sits inside Miami-Dade County’s High Velocity Hurricane Zone, which means every window, door, strap, and fastener on your plans needs a Miami-Dade Notice of Acceptance number before the building department will even look at your drawings. We’ve been pulling those permits and passing those inspections for homeowners across Miami Gardens since 1998. Call (877) 610-1318 and we’ll walk your property with you, scope the job in writing, and give you a line-item price that won’t move unless you approve a change in writing first.
Why Barrett & Sons Construction Is Miami Gardens’s Preferred Home Additions & ADU Company
We’re Tom Barrett and his sons, and we’ve been running crews in Miami Gardens since before Hurricane Andrew rewrote the building code. Homeowners here don’t want a salesperson who shows a brochure and disappears. They want the person whose name is on the permit. Tom’s name, address, and license number are published and verifiable. Look them up before you sign anything.
Miami Gardens homeowners call us because we know what’s behind the walls of the 1950s and 1960s concrete block ranches that fill neighborhoods like Norwood, Andover, and Bunche Park. We know the inspectors. We know which NOA numbers get approved on the first pass. And we know that a quote that ignores the roof-to-wall retrofit already hiding in your walls isn’t a real quote, it’s a sales pitch with a surprise waiting inside.
Every job we start in Miami Gardens gets a written change order before any scope change touches the work. Every allowance goes on paper. Every permit gets pulled and every inspection gets signed, because the inspector works for you, not for me. That’s why I like him.
Our Home Additions & ADU Services in Miami Gardens
Most of the work we do in Miami Gardens falls into four paths, and they all start the same way: with an honest look at what your existing structure can carry and what the county will require once walls come down. Here’s how each one works on the ground in Miami Gardens.
ADU Design & Permitting
A detached ADU in Miami Gardens starts on paper before a shovel touches ground. Miami-Dade requires the exact NOA number for every window, door, structural connector, and roofing fastener called out on the permit drawings. Miss one, and the permit sits. We handle the full design and permitting package in-house, including the site plan that accounts for Miami Gardens’s flat limestone substrate and seasonally high water table. This matters because the wrong site prep turns a clean slab pour into a standing-water failure after the first summer afternoon storm.
Room Additions
Adding a bedroom or family room to a 1960s concrete block ranch in Miami Gardens usually means opening an exterior wall and finding what the original builder left there. Rusted or missing roof-to-wall straps. Corroded anchors. Failed stucco waterproofing at the roofline. Current HVHZ code mandates retrofitting those connections before any addition can pass a framing inspection. We plan for that in the initial scope and the allowance, so it doesn’t blindside you mid-framing.
Garage Conversion ADU
Converting the attached or detached garage that came with Miami Gardens’s postwar CBS homes is usually the fastest path to a rental or in-law unit, but it’s not just drywall and a mini-split. The garage slab often sits too low, the roof structure was never designed for habitable space, and the existing openings rarely carry NOA-compliant impact products. A garage conversion in Miami Gardens runs $35,400-$94,400. We’ll tell you before we start exactly where your existing structure meets code and where it doesn’t.
Junior ADU & Interior Conversion
A junior ADU, typically carved out of existing interior square footage, triggers fewer structural requirements than a detached build, but Miami Gardens’s water table still affects any new bathroom or kitchen plumbing. Boxing in a wet wall in a 1950s ranch means dealing with cast-iron drains and slab penetrations that may not meet current code. We plan for it. We write it down. You approve it in writing before we cut anything.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Miami Gardens
We don’t install mystery brands off a van. On Miami Gardens projects you’ll see Techo-Bloc and Cambridge Pavers on hardscape and patio portions of an ADU or addition, and Quikrete products in our concrete and masonry work. These are names you can walk into a supply yard and verify. When we need something specific to your Miami Gardens permit, we source it locally and we confirm the NOA sticker is on the product before it shows up on your lot.
Common Home Additions & ADU Problems We See in Miami Gardens Homes
- Rusted roof-to-wall straps on 1950s and 1960s CBS construction. Original builders didn’t install modern hurricane-load connectors. Once we open the wall for a room addition, the inspector will require the retrofit before framing can continue.
- Impact products without Miami-Dade NOA stickers. An impact window that’s approved in Broward won’t automatically pass in Miami Gardens. If the NOA number isn’t on the drawing and on the product, the rough-in inspection fails, and you’re paying for tear-out and reorder.
- Water in the slab form before the concrete pour. Miami Gardens has a high water table and poor surface drainage. If the site prep for a detached ADU doesn’t account for groundwater and afternoon storms, the pour is compromised before it cures.
- Permit drawings missing structural NOA callouts. Contractors who don’t work inside the HVHZ routinely under-spec connectors and fasteners. The Miami Gardens building department catches it every time, and the homeowner pays the delay.
Pricing for Home Additions & ADU in Miami Gardens, FL
Here’s what full project pricing looks like across the main Home Additions & ADU scopes in Miami Gardens. These ranges reflect the HVHZ compliance work baked in, not added later.
| Project Type | Typical Range in Miami Gardens |
|---|---|
| Home Addition | $53,100-$153,400 |
| ADU Construction | $106,200-$259,600 |
| Garage Conversion | $35,400-$94,400 |
Where your project falls inside those ranges comes down to three things: the condition of the existing structure once we open it, the NOA-compliant products you choose, and the site work your lot requires. We put every one of those variables in writing before we start. Call (877) 610-1318 for a free, line-item estimate on your Miami Gardens addition or ADU. No trip charge inside Miami-Dade County.
We Also Serve Cities Near Miami Gardens
Along with our Home Additions & ADU work across Miami Gardens, our crews serve Carol City, Lake Lucerne, Scott Lake, and Norland. If you’re just outside the city line, call us and we’ll confirm coverage for your street. The same written change orders and NOA discipline apply everywhere we work.
Serving Miami Gardens, FL - Our Local Coverage Area
We’re based in the Miami Gardens 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 Miami Gardens
Every structural connector, impact window, exterior door, and roofing fastener on your ADU permit drawings needs a Miami-Dade Notice of Acceptance number listed next to the product specification. The building department will not approve a permit without those numbers on the drawings, and substitution of an equivalent product from another county’s approval list fails inspection. We prepare those sheets for you as part of our ADU design and permitting service. Call (877) 610-1318 if you want us to review a set of drawings you already have.
In almost every case, yes. Miami Gardens’s 1950s through 1970s CBS homes were built before current HVHZ load-path standards, so once you open an exterior wall for a room addition, the inspector will require new load-bearing straps and anchor connections at the roof-to-wall line before the framing inspection passes. We include this in our initial scope and allowances for Miami Gardens room additions so it doesn’t show up as a surprise line item after demo. If you want us to check your home, call (877) 610-1318.
Miami Gardens sits on flat interior Miami-Dade limestone with a seasonally high water table, so any excavation for a detached ADU slab or footing must account for groundwater intrusion and standing water after afternoon storms before concrete is poured. If the site prep doesn’t handle drainage, the pour will fail. We design ADU site prep around that specific condition in Miami Gardens. Call
No. Miami Gardens enforces the Miami-Dade HVHZ code, which requires the specific NOA number for the exact window or door model on the permit set. A product approved outside Miami-Dade but lacking a Miami-Dade NOA will fail inspection, and you’ll eat the tear-out and reorder cost. We specify NOA-compliant openings from brands like Andersen and Marvin before we submit your permit. Call
We open the wall, we document what we find, we put the added scope and cost in a written change order, and we stop work until you approve it in writing. An allowance that isn’t on paper is a surprise waiting for a date. That’s why every Barrett & Sons contract in Miami Gardens has allowances written into it before demolition starts. Call for a free estimate. Tom’s name, address, and license number are published, and every job carries the written 90-Day Done Right Promise. It’s not done right, one call brings Tom back.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Miami Gardens with permits pulled, inspections signed, and prices in writing since 1998.
Why Miami Gardens Chooses Barrett & Sons Construction
We set the standard for home additions & adu in Miami Gardens.
No Change-Order Surprises
The written quote you sign is the price you pay. Anything we find mid-job gets priced and approved by you in writing before we touch it.
Licensed & Insured
Fully certified technicians who meet all local and state licensing requirements.
Upfront Pricing
No hidden fees, no surprises. You approve the price before any work begins.
Guaranteed Work
Every repair and installation is backed by our workmanship warranty and satisfaction guarantee.
How It Works in Miami Gardens
Getting your home additions & adu handled is simple and fast.
Call or Request a Free Estimate
Tell us about your home additions & adu needs and we provide an upfront, transparent quote - no obligation, no hidden fees.
Licensed Technician Dispatched
A background-checked, certified technician arrives in Miami Gardens - typically within 30-60 minutes, with parts stocked on the truck.
Problem Solved, Guaranteed
We complete the job to your full satisfaction, backed by our warranty and 100% satisfaction guarantee.
What happens when you call
- 1A real person answersNo phone trees - talk to a local home additions & adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Miami Gardens Customers Say
Trusted by homeowners across Miami Gardens and surrounding areas.
"Came back a year later to sort a door that had dropped as the frame settled. No charge and no argument about whether it was covered."
"Addition over the garage matched the original roofline and brickwork so closely that visitors do not realise it was added. He tracked down the closest brick he could find rather than settling."
"The bathroom was finished on the day he said at the start, which nobody had led me to believe was possible."
Our Work in Miami Gardens
A look at recent construction projects across Miami Gardens and surrounding areas.
Current Offers
Bring these savings to your next appointment.
Free On-Site Estimate & Written Quote
No obligation. We measure, price the job in writing, and the quote is yours to keep.
$40 Off Any Repair Over $200
Free Second Opinion on Any Written Estimate
No Trip Charge Inside Our Own County
Senior & Veteran 10% - Always
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