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 Kendall West
A home addition in Kendall West typically runs $45,000 to $130,000, while a detached ADU runs $90,000 to $220,000. Those numbers move depending on septic and well setbacks, wind-load upgrades on pre-1992 homes, and how much grading your flat limestone lot needs before the first form goes up. We’ve been quoting and building in Kendall West long enough to know exactly which line items apply here and which ones don’t. Call (877) 610-1318 for a written, line-item estimate before you commit to anything.
Kendall West sits against the Everglades buffer, which means the rules are different here than they are a few miles east. Permits run through Miami-Dade County, septic and well setbacks come from the health department, and every material that touches your addition has to pass the county’s Notice of Acceptance review. A contractor who quotes you a number without checking those three things is guessing. We don’t guess. We pull records, map the setbacks, and scope the drainage before we hand you a number.
Tom Barrett founded Home Additions & ADU work on a simple rule: if it’s not on paper, it doesn’t exist. Every allowance, every scope change, every material substitution arrives as a written change order before work proceeds. That’s how we’ve operated since 1998, and it’s why homeowners in Kendall West call us when they want the job done once.
Why Barrett & Sons Construction Is Kendall West’s Preferred Home Additions & ADU Company
We’re not a franchise dispatching strangers to your door. Tom Barrett and his sons run the crews that show up at your house. When you call (877) 610-1318, a live person answers, 24 hours a day, seven days a week. Not a voicemail box. Not an out-of-state call center. You get a real answer from someone who knows the western corridor of Miami-Dade.
Our reputation in Kendall West is built on the permits we pull, not the shortcuts we skip. Every eligible addition and ADU job includes permits pulled and inspections signed. We publish Tom’s name, his license number, and his address. Look it up before you sign anything. The permit inspector works for you, not for us, and that’s exactly why we like having him on the job.
Background-checked crew members who carry the Barrett & Sons name. A written 90-Day Done Right Promise on every contract: if it’s not done right, Tom comes back and makes it right, one call. That’s not fine print. It’s on the front page of every contract we write in Kendall West.
Our Home Additions & ADU Services in Kendall West
New Detached ADU
A detached ADU in Kendall West is a different animal than it is in a denser Miami neighborhood. Your lot likely has a septic drain field and a well somewhere on it, and the county health department has setback requirements that dictate where you can legally place that structure. We map those setbacks from county records before we quote, because an ADU footprint that doesn’t clear them is worthless. You’re also building on oolitic limestone with a high water table, so slab elevation and a proper drainage plan become load-bearing decisions, not afterthoughts. A typical detached ADU in Kendall West runs $90,000 to $220,000 depending on size, utilities, and how much site prep your specific lot demands.
ADU Site Prep & Utilities
This is where Kendall West projects go wrong fastest. Grading errors on flat limestone cause stormwater to pond against new slab edges, and within two years you’ve got foundation cracking. We run a grading plan before we quote, and we spec slab design that accounts for the seasonal water table. If your lot needs a French drain or a 6-inch rise above the water table, that’s in the bid up front, not a surprise invoice at the end.
Garage Conversion ADU
Converting an existing garage skips some of the septic and well headaches because you’re working within an existing footprint. But don’t assume it’s simple. Miami-Dade’s post-Hurricane Andrew building code applies to any permitted conversion, and if your home predates August 1992, the conversion can trigger mandatory wind-load and tie-down upgrades on the existing structure. We check that before we quote. A garage conversion in Kendall West runs $30,000 to $80,000.
Junior ADU & Interior Conversion
A junior ADU built inside your existing home is typically the most affordable path to rental income or a family suite. It avoids septic and well setback issues entirely because you’re not adding a new footprint. But interior conversions still need permits, still need inspections, and still need to meet Miami-Dade’s NOA material standards. We handle the design, the permitting, and the build as one scope, so nothing falls through the gap between an architect’s drawing and the county’s review desk.
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 Kendall West
We don’t install mystery materials off a van. When we lay a paver patio alongside your addition or build out the hardscape around a new ADU, we’re working with Belgard, Techo-Bloc, and Cambridge Pavers. Brands you can look up. Brands with Miami-Dade NOA approvals that pass inspection the first time. We keep local parts and material channels open for Kendall West customers because a missing paver color or a wrong window flashing shouldn’t add two weeks to your project.
Common Home Additions & ADU Problems We See in Kendall West Homes
- Permit rejection for materials without a Miami-Dade NOA. A Florida statewide approval is not enough in this county. Out-of-county contractors learn this the hard way. We submit materials that already carry NOA approvals, so your permit doesn’t stall at the review desk.
- Grading errors that pond water against new slabs. Kendall West is flat and sits on limestone. Even modest grading mistakes send stormwater pooling at your new foundation. We run a grading plan and spec drainage in the original bid, not as a change order later.
- Septic and well setbacks that make the planned ADU footprint infeasible. We’ve seen homeowners buy plans for an ADU that physically cannot be placed on their lot without an engineered variance. We map setbacks from county records before you spend a dollar on design.
- Wind-load upgrades triggered on pre-1992 homes. If your home predates the post-Andrew code overhaul and you add a second story or attach an addition, the county requires tie-down and roof-to-wall connection upgrades on the existing structure. We scope those costs before we quote, so you’re not surprised at permit time.
Pricing for Home Additions & ADU in Kendall West, FL
Here’s what Kendall West homeowners should expect for the most common scopes, based on our recent bids in the 33193 zip code and surrounding areas.
| Project | Typical Kendall West Price Range |
|---|---|
| Home Addition | $45,000 - $130,000 |
| ADU Construction | $90,000 - $220,000 |
What moves these numbers in Kendall West more than anything is the lot itself. A detached ADU on a lot with a standard septic and well layout costs one thing. A detached ADU that requires an engineered variance for setbacks, a French drain system, and a 6-inch slab rise costs another. We put every one of those line items in writing before you sign. There are no allowances hiding off-paper. An allowance that isn’t on paper is a surprise waiting for a date, and we don’t do surprises.
On a mid-1980s CBS home near SW 147th Avenue, our crew scoped a 500-square-foot detached ADU. Before quoting, we mapped the septic drain field and well setbacks from county records, then ran a grading plan for the oolitic limestone shelf. The slab design had to include a French drain and a 6-inch rise above the seasonal water table. Our bid accounted for wind-load tie-down upgrades on the main house because the addition triggered the post-Andrew code requirement on the older structure. That’s what a real Kendall West quote looks like.
Call (877) 610-1318 for a free estimate. You’ll get a written, line-item bid that accounts for your lot, your septic, your well, and your drainage before you sign anything.
We Also Serve Cities Near Kendall West
Our crews work throughout the western Miami-Dade corridor. If you live in Kendale Lakes, Country Walk, The Hammocks, or The Crossings, the same team that serves Kendall West serves you too. Scheduling and dispatch run through our Miami office, but the crew that shows up is a local Kendall West crew that knows the inspection quirks and lot conditions of this side of the county.
Serving Kendall West, FL - Our Local Coverage Area
We’re based in the Kendall West 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 Kendall West
Septic drain fields and wells have county health department setback requirements that dictate how far a new structure must sit from each, and those setbacks often shrink the usable buildable area on a Kendall West lot more than homeowners expect. We pull county records and map those setbacks before you invest in design work, because an ADU footprint that doesn’t clear the setbacks is a nonstarter without an engineered variance. Call (877) 610-1318 and we’ll check your lot first.
Miami-Dade’s Notice of Acceptance is the strictest product-approval system in the country, and inspectors in the western corridor routinely reject materials that carry a Florida statewide approval but lack a specific Miami-Dade NOA. That rejection costs you weeks of delay and a permit re-submittal. We submit only NOA-approved materials on Kendall West jobs, which is one reason our permits move through the first time.
Any permitted addition to a home built before August 1992 triggers Miami-Dade’s post-Hurricane Andrew structural requirements, which usually means roof-to-wall tie-down upgrades and sometimes wall-to-foundation connection work on the existing structure. Those upgrades become part of your addition scope, not an optional extra. We scope them before we quote so you’re not hit with a change order at permit time. Call (877) 610-1318 for an exact quote on your home.
We run a grading plan before quoting any addition or ADU in Kendall West, and we design the slab to sit at least 6 inches above the seasonal water table with a drainage path that moves stormwater away from the foundation. On a flat limestone shelf, even small grading errors cause ponding that cracks slabs within a few years. A French drain or a raised slab edge gets built into the original bid, not added later.
Kendall West sits at the western edge of the built environment, which means longer material hauls from suppliers and tighter coordination on equipment access, especially on lots with narrow side setbacks or septic fields that limit where a truck can stage. That affects delivery timing and sometimes the equipment we can bring in. We plan for it before we quote, so your schedule doesn’t slip waiting on a delivery. Call (877) 610-1318 to talk through your specific lot.
Get Your Kendall West Home Addition or ADU Quoted the Right Way
If you’re planning a home addition or ADU in Kendall West, get a quote that accounts for the county’s septic and well setbacks, the NOA material standard, the wind-load triggers on older homes, and the drainage reality of a flat limestone lot. Those are the things that change your price and your timeline, and they should all be in writing before you sign.
Call (877) 610-1318 for a free estimate. Tom Barrett and his sons run the crews, every permit gets pulled, every price change arrives as a written change order, and every completed job is backed by the written 90-Day Done Right Promise. We’ve been doing it this way since 1998.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Kendall West since 1998.