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 Hialeah
Home additions and ADU construction in Hialeah typically run $45,000 to $220,000 depending on whether you’re adding a room, building a detached unit, or raising the roof for a second story. The bigger variable here isn’t square footage, it’s whether the existing structure can carry the load under Miami-Dade’s High Velocity Hurricane Zone code, and whether Hialeah’s own building department finds old permits that were never closed. We’re Barrett & Sons Construction, and we’ve been walking Hialeah homeowners through exactly this process since 1998. If you want a straight answer about what your addition will actually cost and what the city will actually require, call (877) 610-1318.
Why Barrett & Sons Construction Is Hialeah’s Preferred Home Additions & ADU Company
We’re not a franchise that sends a salesman with a tablet and a canned pitch. Tom Barrett’s name is on the truck, his sons run the crews, and every Hialeah job gets permits pulled and inspections signed before we call it done. Homeowners in the 33015 and 33016 zip codes have called us after other contractors told them permits were “optional” on a garage conversion, and we’ve had to clean up exactly that mess more than once.
Hialeah has its own municipal building department, separate from Miami-Dade County. That means the inspector who signs off your ADU answers to the city of Hialeah, not to a county office in a different building. We know their cadence, their re-inspection policies, and what they flag on pre-Andrew CBS homes. That local knowledge is the difference between a permit that closes in weeks and one that stalls for months. Call (877) 610-1318 and ask for Tom, he’ll tell you straight what your project is up against.
Our Home Additions & ADU Services in Hialeah
Here’s what we handle most often for Hialeah homeowners. Each one gets the same treatment: scope in writing, allowances in writing, change orders in writing.
ADU Design & Permitting
A detached ADU in Hialeah isn’t just a small house in the backyard. It has to meet HVHZ wind-load standards, carry Miami-Dade NOA-approved impact openings, and pass Hialeah’s own plan review before a shovel touches dirt. We handle the design, the engineering, and the permit package, and we’ll tell you upfront if the old open permit from 1987 is going to be a problem before it becomes one.
New Detached ADU
Building a new detached ADU on a Hialeah lot usually means excavating into Miami limestone with the water table sitting about two feet below grade during wet season. That’s not a surprise, that’s a line item. We budget for dewatering, pour the footers right, and frame to wind ratings that most of the country never has to think about. A compliant Hialeah ADU runs $90,000 to $220,000, and you should be suspicious of any quote that comes in far under that without explaining what’s missing.
Garage Conversion ADU
Hialeah is full of 1950s and 1960s garages that were never designed to be lived in. Converting one to an ADU means bringing the slab, the electrical, and the openings up to current code, which often triggers improvements to the main house as well. We’ve done enough of these in Hialeah to tell you honestly whether your garage is a good conversion candidate or a money pit before you spend a dime on plans.
Junior ADU & Interior Conversion
For Hialeah owners who want rental income or space for aging parents without a full detached build, a junior ADU carved out of existing square footage can make sense. These jobs are smaller in scope, but Hialeah’s inspectors still review them under the same code umbrella, and we still pull the permit.
What happens when you call
- 1
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 Hialeah
When a Hialeah addition calls for impact-rated openings or upgraded exterior cladding, we install products from PGT and Simonton, brands Hialeah inspectors know by name. That matters here more than almost anywhere else in the country. An NOA-listed window from PGT clears plan review faster and carries the documentation your insurer wants to see after a storm. We stock and order for Hialeah jobs specifically, so you’re not waiting on a backorder from a regional warehouse while your rough-in inspection date comes and goes.
Common Home Additions & ADU Problems We See in Hialeah Homes
- Legacy open permits freezing new work: Hialeah’s building department inherited decades of un-finaled permits from prior owners. We’ve watched a planned second-story addition on a 1962 CBS home near Palm Avenue get frozen for six weeks while the city flagged an abandoned permit from the previous owner. We search for these before you pay for plans.
- Unpermitted Florida rooms buried in the walls: That aluminum patio enclosure from the 1980s may not have been inspected when it was added. Open a wall for a room addition and you might find wiring that was never signed off, which must be remediated before your new permit closes.
- Non-impact windows failing rough-in inspection: Buy cheap windows for an ADU in Hialeah and you’ll fail the inspection and pay twice. Every opening in a new addition or ADU has to carry Miami-Dade NOA approval, and Hialeah inspectors check the stickers.
- Water table surprises during excavation: Footing work on an ADU in wet season digs into water two feet below grade. Contractors who don’t price dewatering will hand you a change order mid-project. We put it in the original quote.
Pricing for Home Additions & ADU in Hialeah, FL
Here’s what Hialeah homeowners should expect to pay for the most common addition and ADU scopes. These are not placeholder numbers, they’re what we quote across Hialeah’s four zip codes.
| Scope | Typical Price Range in Hialeah |
|---|---|
| Home Addition (room, bump-out, enclosed patio) | $45,000 - $130,000 |
| ADU Construction (new detached unit) | $90,000 - $220,000 |
| Garage Conversion ADU | $30,000 - $80,000 |
The spread depends on what’s already in the ground and what the city makes you bring up to code. A $45,000 room addition on a house with clean permits and a dry slab is a different job from a $130,000 addition on a pre-Andrew CBS home with open permits and a flooded footing excavation. The quote we give you includes the dewatering, the engineering, the NOA-rated openings, and the Hialeah permit fees. If another contractor’s number doesn’t include those things, it isn’t cheaper, it is incomplete. Call (877) 610-1318 to schedule a free estimate and we’ll put the numbers on paper.
We Also Serve Cities Near Hialeah
We run crews into Hialeah Gardens, Miami Lakes, Miami Springs, and Opa-locka for additions and ADU work on a regular basis. The code environment shifts across those city lines, though. Hialeah’s standalone building department has its own rhythms, and our Home Additions & ADU in Hialeah work reflects that. If you’re a block over the line, we’ll tell you whose inspectors you’ll be dealing with before we quote. Our Home Additions & ADU team covers all of it.
Serving Hialeah, FL - Our Local Coverage Area
We’re based in the Hialeah 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 Hialeah
Yes, Hialeah requires Miami-Dade NOA approval for every impact-rated window, door, and roofing component installed in a permitted addition or ADU. The inspector will check the product stickers at rough-in, and you cannot pass without them. If you’re pricing a job and the window line isn’t NOA-listed, walk away. Call (877) 610-1318 and we’ll give you a quote that includes compliant products from the start.
Yes, this happens constantly in Hialeah, and it often happens after plans are drawn and paid for. The city’s permit office can see open permits from prior owners that were never finaled, and they will freeze your new project until those old permits are resolved or legally abandoned. We run a permit history check before we design anything, so you know what you’re stepping into on day one, not week twelve.
Every second-story addition in Hialeah must meet the High Velocity Hurricane Zone standards written into the Florida Building Code. That means engineered roof-to-wall connections, specific sheathing fastening schedules, and impact protection on every opening. It is the same standard the rest of Miami-Dade enforces, and it’s stricter than almost anywhere else in the country. If a quote doesn’t mention HVHZ compliance by name, ask why.
Because Hialeah sits on low-lying Miami limestone and the water table can rise to within two feet of grade during the June through October wet season. Digging footers for an ADU without dewatering equipment means the excavation floods, the concrete pour gets delayed, and you get a change order. We line-item dewatering in the original quote so it doesn’t show up later as a surprise. Estimates are free, call (877) 610-1318 for exact numbers on your lot.
Usually yes, but the existing slab, electrical feed, and roof structure have to be brought up to current code, and that often means work on the main house too. We’ve converted carports in 33015 and 33017, and the biggest variable is whether the original slab was poured thick enough to meet today’s habitable-space standards. Some were, some weren’t. We’ll tell you within the first consultation which one you have.
Call Barrett & Sons Construction for Your Hialeah Home Addition or ADU
If you want a contractor who publishes his name, his address, and his license number, and who will hand you every scope change in writing before a nail moves, call (877) 610-1318. We’ll walk your Hialeah property, check the permit history, and give you a line-item quote that accounts for the city’s actual building department and the actual ground you’re building on. The estimate is free. The 90-Day Done Right Promise is on every contract we write. And Tom answers his own phone.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Hialeah since our founding in 1998.