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 North Miami Beach
Adding square footage in North Miami Beach carries a very different set of rules than almost anywhere else in the country. You’re building inside Miami-Dade County’s High Velocity Hurricane Zone, where a product approval from the state of Florida means nothing unless it also carries the specific Miami-Dade NOA number. A home addition or ADU in North Miami Beach typically runs between $53,100 and $153,400 depending on scope, site conditions, and whether you’re converting existing space or pouring new footings. We’ve worked this corridor long enough to know that the water table often sits just 2-4 feet below grade here, and we plan for that before the first shovel moves. If you’re thinking through options for an addition or an ADU on your property, call (877) 610-1318 and Tom or one of his sons will walk the site with you.
Why Barrett & Sons Construction Is North Miami Beach’s Preferred Home Additions & ADU Company
We’re not a franchise dispatching strangers from another county. Tom Barrett founded this company in 1998, and his sons run the crews. When a homeowner on NE 171st Street or along Biscayne Boulevard calls about a garage conversion or a second-story addition, the person who answers is someone who knows the difference between what a Broward inspector will pass and what a City of North Miami Beach inspector will flag. That distinction costs people real money when it’s missed.
Customers in North Miami Beach have told us the same story in different words: another company quoted a number, started the job, then delivered a change order invoice they never agreed to. Our standing rule is the opposite. Every scope, every allowance, every price change arrives as a written change order before work happens. If it’s not on paper, it doesn’t exist. That’s why homeowners near the Intracoastal and in the interior CBS neighborhoods off NE 163rd Street keep our number. Tom publishes his name, his address, and his license number. Look any of it up before you sign anything.
We also carry the Home Additions & ADU workload end to end. Design, permitting, site prep, foundation work, framing, roofing, finishes. One crew with one name on the truck, and a live person answers the phone 24/7. You won’t get a voicemail box.
Our Home Additions & ADU Services in North Miami Beach
ADU Design & Permitting
An accessory dwelling unit in North Miami Beach puts you in front of two authorities at once: the City of North Miami Beach and Miami-Dade County’s Building and Neighborhood Compliance department. We handle the drawings, the NOA product submissions, and the inspection schedule. Most homeowners don’t know that a window approved for Fort Lauderdale can stop a job cold in ZIP 33160 if the manufacturer never filed for Miami-Dade NOA certification. We verify that before the order is placed.
Garage Conversion ADU
Converting an existing garage is usually the most cost-efficient path to rental income or an in-law suite in North Miami Beach. Many garages in this area were built decades ago on slabs that were never engineered for living space. Ours are checked for slab thickness, tie-downs, and hurricane strapping before the first wall goes up. A garage conversion here usually falls between $35,400 and $94,400 depending on whether the slab can be reused or needs to be repoured with deeper footings.
New Detached ADU
When the lot allows, a new detached ADU in the rear yard gives you the most design freedom. The challenge in North Miami Beach is excavation. The water table in much of ZIP 33160 sits just a few feet down, which means engineered pilings or deep footings are often required, not optional. We price that honestly from the start. You’ll see it as a line item, not a surprise at the end.
Junior ADU & Interior Conversion
A junior ADU, typically carved out of an existing home’s interior with a separate entrance, kitchenette, and bath, is a practical option for homeowners in North Miami Beach who don’t have room for a detached structure. These projects move faster because they don’t require new foundation work, but they still require the same HVHZ product approvals and the same written change order discipline. If you’re already planning a Kitchen Remodeling in North Miami Beach or a Bathroom Remodeling in North Miami Beach, a junior ADU can often be designed into that same scope. We coordinate those with one crew and one schedule.
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 North Miami Beach
We don’t install mystery materials off a van. On hardscape and paver work tied to ADU site prep, that means products like Techo-Bloc and Cambridge Pavers. For exterior paver patios, walkways, or driveways that accompany a new ADU, those are brands with names you can look up before installation. Tom’s sons carry the same premium-brand standard across every trade. If a supplier in North Miami Beach doesn’t stock what’s specified, we order it and wait rather than substitute without written sign-off.
Common Home Additions & ADU Problems We See in North Miami Beach Homes
- HVHZ product substitutions killing a permit. A subcontractor installs a Florida-approved impact window that lacks the Miami-Dade NOA number. The City of North Miami Beach inspector flags it. The project stops. We verify NOA numbers before anything is ordered.
- Slab and footing surprises from the high water table. Digging in North Miami Beach often means hitting water at 2-4 feet. Foundation plans that work inland require engineered pilings or thickened footings here. We price for this reality, and it’s in the written scope from day one.
- Salt-air corrosion on hardware and anchors. Homes between the Atlantic and the Intracoastal Waterway get a double dose of salt air, which eats standard fasteners and steel reinforcement faster than inland Miami. We specify marine-grade hardware on North Miami Beach additions, especially anything within sight of salt water.
- Dual-layer inspection delays. A change that passes Broward in one visit can take two or three visits in North Miami Beach because both the city and the county review it. If a contractor hasn’t planned for that timeline, your move-in date slips. We schedule for it from the beginning.
Pricing for Home Additions & ADU in North Miami Beach, FL
A full Home Additions & ADU in North Miami Beach project runs $53,100 to $153,400. A garage conversion ADU typically lands between $35,400 and $94,400. A new detached ADU that requires pilings and deep footings can push from $106,200 to $259,600 depending on finish levels and utility runs. Interior junior ADUs and room additions stay at the lower end because they avoid new foundation work. What moves the number here is site access, the water table at your exact address, and whether your existing structure was built to current HVHZ strapping requirements or needs to be brought up. We give you a written line-item estimate before any work starts, and if anything changes during the job, you get a written change order to approve first. Call (877) 610-1318 to schedule a free site visit and walk the property with Tom. We serve all of ZIP 33160.
We Also Serve Cities Near North Miami Beach
Our crews regularly work in Ojus, Sunny Isles Beach, Aventura, and Hallandale Beach. The code environment shifts quickly once you cross the county line, and we pay attention to that. If you’re in a neighboring community and want a contractor who knows that a Miami-Dade NOA product doesn’t automatically clear Broward, call us. We’ll tell you straight what applies to your address.
Serving North Miami Beach, FL - Our Local Coverage Area
We’re based in the North Miami Beach 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 North Miami Beach
Most North Miami Beach additions and ADUs start within two to four weeks of a signed contract and approved permit set. The permitting timeline itself depends on whether your project needs only city review or both city and county review, which is common for anything touching the building envelope in ZIP 33160. Call (877) 610-1318 and we’ll give you a realistic schedule for your specific scope.
Yes, and we insist on it. Every window, door, and roofing product we install in North Miami Beach carries a Miami-Dade NOA number, not just a Florida statewide approval. The permit inspector works for you, not for me, and that’s exactly why we like him. No shortcuts on code, ever.
It can change only if the scope changes, and every change arrives as a written change order before work happens. We don’t send surprise invoices at the end. An allowance that isn’t on paper is a surprise waiting for a date. That’s a Tom Barrett rule, and it’s printed on every contract.
North Miami Beach tends to run higher than inland Miami-Dade and Broward cities because of the HVHZ product requirements and the frequent need for engineered footings near the Intracoastal. A garage conversion that might run $30,000 inland can push to $35,400 or more here. We price the actual site, not a regional average.
Every eligible job includes permits pulled and inspections signed. The last contractor most of our North Miami Beach customers used told them permits were optional. They aren’t, not here, and especially not in the High Velocity Hurricane Zone. We handle the paperwork and the inspection schedule.
If you’re ready to talk through an addition or ADU on your North Miami Beach property, call (877) 610-1318 for a free, no-pressure estimate. Tom or one of his sons will answer.
Written by Tom Barrett, Owner at Barrett & Sons Construction, founded 1998 and serving Miami-Dade County since day one.