Home Additions & ADU in The Hammocks - One Fixed Price, Permits Handled

Fast, Reliable Home Additions & ADU Across The Hammocks

Home additions and ADUs in The Hammocks typically run $45,000-$130,000 for a room addition, while a detached ADU lands between $90,000 and $220,000 once you factor in Miami-Dade structural retrofits. The work rarely stops at the new square footage, because most original homes in The Hammocks were built before Hurricane Andrew, and any permit application triggers a review of the existing shell. We know The Hammocks at the permit-counter level, not just the street level. Call (877) 610-1318 and we’ll walk you through what your specific home will actually require.

Call (877) 610-1318

Every home addition in The Hammocks starts with a structural reality check. The community sits on Miami-Dade’s oolitic limestone plain, where the water table can sit 14 inches below grade. That changes foundation design for any ADU or addition. The homes themselves are almost all CBS concrete block from the late 1980s and 1990s, many with original clay tile roofs that predate post-Andrew nailing patterns. None of this is a mystery if you work here every week. It is if you don’t.

Why Barrett & Sons Construction Is The Hammocks’s Preferred Home Additions & ADU Company

Tom Barrett founded this company in 1998, and his sons run the crews. That means the person who signs your contract is the same family that shows up on the job. We’re not a franchise dispatching strangers to The Hammocks. When a homeowner on SW 104th Street calls about a cracked tile or a foundation question, Tom or one of his sons is on the phone. A live person answers, 24 hours a day, every day of the week.

Our reputation in The Hammocks comes from doing the unglamorous parts right. Every scope item goes in writing. Every allowance goes in writing. Every price change is a written change order before a single nail moves. The permit inspector works for you, not for us. That’s why we like him. We pull permits and get inspections signed on every eligible job, because the last contractor most of our customers used in southwest Miami-Dade told them permits were optional. They aren’t. Especially not here.

Every job comes with our 90-Day Done Right Promise, written on the contract, not buried in fine print. If something’s not done right, Tom comes back and makes it right, one call. That’s the whole promise.

Our Home Additions & ADU Services in The Hammocks

ADU Design & Permitting

This is where The Hammocks separates serious contractors from the rest. Miami-Dade County runs its own Notice of Acceptance (NOA) product-approval system. Every window, exterior door, roofing fastener, and underlayment must carry a Miami-Dade NOA. Products legal everywhere else in Florida get failed here. We design ADUs around the NOA list from the first sketch, so you don’t pay for a tear-out later. Our Home Additions & ADU team handles the full permit package and HOA submittal.

Garage Conversion ADU

A garage conversion in The Hammocks runs $30,000-$80,000 depending on whether the original slab can handle the new use. In this community, the bigger question is usually the wall that connects the garage to the main house. If it’s a load-bearing CBS wall from 1989, cutting into it without structural plans voids whatever remains of the original builder warranty and invites a failed inspection. We submit structural plans first, every time.

New Detached ADU

Detached ADUs in The Hammocks run $90,000-$220,000. That range exists because of what’s under the grass. Dig 14 inches and you hit water. The footing trench floods. If your contractor didn’t plan for dewatering and engineered fill, the concrete pour gets delayed and the budget balloons. We start every detached ADU in The Hammocks with a site evaluation that accounts for the water table before the first bucket of dirt moves.

Junior ADU & Interior Conversion

Sometimes the smartest ADU is already inside your house. A junior ADU in The Hammocks might convert a ground-floor bonus room or an enclosed patio into an independent unit with its own entrance. The zoning rules in Miami-Dade for JADUs changed recently, and we stay current on what your specific lot in The Hammocks qualifies for. These conversions usually cost less than a ground-up ADU because the shell already exists.

Trusted Brands We Service in The Hammocks

We install windows and doors from brands that carry Miami-Dade NOA approvals, including PGT, Simonton, and CGI. That matters in The Hammocks more than almost anywhere else in the country. When a window fails inspection in Broward County, you swap it. When it fails in The Hammocks, you’ve spent thousands on a product that was never going to pass here. We don’t install mystery brands off a van. Every material we put on your home in The Hammocks has a product approval number you can look up before we order it.

Common Home Additions & ADU Problems We See in The Hammocks Homes

• Water table flooding during excavation. The water table in The Hammocks sits 12-18 inches below grade. Crews that don’t plan for dewatering watch their footing trench fill with standing water, and the pour gets pushed back weeks. We budget for this from day one.
• Non-impact windows and doors failing HVHZ requirements. Homes built before Hurricane Andrew in The Hammocks often have original non-impact openings. Any addition or ADU that touches the building envelope triggers a requirement to bring those openings up to current Miami-Dade High-Velocity Hurricane Zone code. That’s not optional.
• Roof-to-wall connections that don’t meet post-Andrew standards. Original 1980s and early 1990s CBS homes in The Hammocks frequently lack the hurricane clips and strapping required today. A second-story addition won’t pass inspection if the existing roof deck isn’t retrofitted first.
• HOA architectural review delays. The Hammocks is a master-planned community with a homeowners association that reviews exterior changes. Even interior work that changes rooflines, window placement, or structural walls needs architectural committee sign-off. We handle that paperwork so your permit doesn’t stall.

Pricing for Home Additions & ADU in The Hammocks, FL

We Also Serve Cities Near The Hammocks

Our Home Additions & ADU in The Hammocks crews work throughout southwest Miami-Dade. You’ll find us in Country Walk, The Crossings, Three Lakes, and Kendall West, often on the same day for estimates. The permitting rules and water table realities don’t change much across these communities, but every HOA has its own quirks, and we know them.

FAQs - Home Additions & ADU in The Hammocks