Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Before
After
Before
After
Before
AfterFast, Reliable Home Additions & ADU Across Southwest Ranches
Home additions and ADU construction in Southwest Ranches typically run $45,000-$130,000, and a new detached ADU generally lands between $90,000 and $220,000. The price gap between those numbers has less to do with square footage than it does with your lot: water table depth, ag-zoning overlays, and drainage design. Tom Barrett and his sons have been building on acreage around Southwest Ranches long enough to know which of those three will move your budget before the first footing gets poured. Call (877) 610-1318 for a free estimate, and we’ll come walk your property before we quote a single number.
Building in Southwest Ranches isn’t like building in Pembroke Pines or Cooper City. You’re on 1.25 to 5 acres of land that sits right up against Everglades conservation ground, where the water table can be as little as 18 to 36 inches below grade. That single fact eliminates below-grade construction on nearly every lot, forces elevated slabs, and makes engineered drainage a hard requirement rather than a nice-to-have. We plan for it from day one because we’ve already had the conversation with Broward County’s permit reviewers a hundred times.
Key Takeaways
- Water table drives scope. Most Southwest Ranches additions need elevated pads and a dewatering plan before rough-in.
- Ag zoning can trigger a second review path. A detached ADU near an existing barn may need agricultural overlay sign-off, not just county building review.
- Written change orders are standard. Every allowance, every scope shift, every price change lands on paper before work proceeds.
- Permits get pulled and inspections get signed. We don’t treat permits as optional, especially not in a town with an ag overlay.
Here’s the thing about Southwest Ranches that most out-of-town contractors miss: it’s Broward County’s only incorporated equestrian town. People didn’t move here to be part of suburbia. They moved here to keep horses, build barns, and stay rural. That shapes everything we do, from how we run conduit to an ADU behind a stable to how we handle the ag-structure review that a standard addition next door would never trigger. If you’re reading this because a previous quote fell apart at permitting, that’s probably why.
Why Barrett & Sons Construction Is Southwest Ranches’s Preferred Home Additions & ADU Company
We’re the owner-operated, name-on-the-truck outfit that’s been doing this since 1998. Tom Barrett is on-site most days, and his sons run the crews. You won’t get a rotating cast of subcontractors you’ve never met and will never see again. You’ll get the same faces from the first site walk to the final inspection sign-off. Ask anyone on your street, or look up the license number yourself – Tom publishes his name, address, and license, and that’s not an accident.
Every job we scope in Southwest Ranches comes with a written line-item quote before we start, and a written change order before anything changes. No surprise invoices at the end, because an allowance that isn’t on paper is a surprise waiting for a date. The permit inspector works for you, not for me – that’s why I like him. If the county flags something, we fix it and show you the paper trail.
We also answer the phone. A live person, 24/7, not a voicemail box and not an out-of-state call center. When you call (877) 610-1318, you get someone who knows what a high water table means for your slab, not someone reading from a script.
Every completed addition or Home Additions & ADU job in Southwest Ranches is backed by our 90-Day Done Right Promise, written on the contract. If it’s not done right, one call brings Tom back.
Our Home Additions & ADU Services in Southwest Ranches
ADU Design & Permitting
This is where most Southwest Ranches ADU projects either live or die. You’re not just submitting plans to Broward County. If your property has a barn, stable, or arena, the town’s agricultural zoning overlay may pull your detached ADU into a separate review track. We scope that before you spend a dime on drawings, because a stop-work order two months in is the most expensive mistake you can make. Our ADU design and permitting service handles the county filing and the ag-overlay path together.
New Detached ADU
A new detached ADU in Southwest Ranches runs $90,000-$220,000, and the wide spread comes down to foundations, drainage, and utility runs. On a 5-acre lot off Stirling Road, that can mean a 200-foot electrical trench, a septic tie-in review, and an engineered pad raised 18 inches above the seasonal water table. We build hardened structures that meet HVHZ code, with impact-rated openings where the county requires them.
Garage Conversion ADU
Converting an existing detached garage on a Southwest Ranches equestrian property typically costs $30,000-$80,000. The catch is that many of those garages were built decades ago, before current wind-load standards, so the conversion often triggers a roof system upgrade and impact window retrofit as a condition of the permit. We’re upfront about that in the quote, not after the demo crew shows up.
Junior ADU & Interior Conversion
For homeowners who want rental income without a ground-up build, a junior ADU inside the existing house usually means converting a large bonus room, guest wing, or the old in-law quarters. On Southwest Ranches estates with 1960s-1980s ranch construction, that almost always means the county wants the opening upgrades and updated electrical before signing off. We scope that in the initial walk-through, not as a change order later.
ADU Site Prep & Utilities deserves its own mention because it’s the service that saves Southwest Ranches homeowners the most money. Proper site prep means dewatering, compacted fill, a perimeter swale, and utility trenching planned before the slab goes down. Do it wrong and you’ve got a pond where your foundation should be. We recently scoped a detached ADU on a 2.5-acre lot off Stirling Road where the county flagged the proposed slab as too low for the seasonal water table. Our crew re-engineered the pad with 18 inches of compacted fill and a perimeter swale before rough-in, and we coordinated the ag-structure overlay review so the adjacent equipment barn stayed in compliance. The owner got a hardened ADU with a signed inspection sign-off before the first wall went up.
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 Southwest Ranches
We stock and install materials you can look up, not mystery brands off a van. For ADU kitchens and baths, we’re comfortable working with Schluter waterproofing systems, Sterling fixtures, and Grohe plumbing. On the roofing side, we install GAF systems that meet Broward County HVHZ requirements. The brand matters less than the paper trail behind it, but we’d rather install something with a manufacturer warranty you can actually call on.
Common Home Additions & ADU Problems We See in Southwest Ranches Homes
- Pouring a slab without a dewatering plan. After a heavy afternoon rain, the excavation turns into a pond and the inspection sign-off stalls for days. We plan for water before we dig, not after.
- Submitting county plans without the ag overlay review. A detached ADU near an existing barn can trigger a stop-work order if the town’s agricultural zoning review wasn’t run first. We run both paths from day one.
- Underestimating material haul distances. Supplies come from eastern Broward suppliers, and a missed truss delivery on a flat lot with limited access can stall the whole draw schedule. We schedule long-haul materials with buffer time built in.
- Assuming a 1960s ranch can take a second story. Many Southwest Ranches homes predate HVHZ standards, so a second-story addition means upgrading roof structure and impact openings below it. We scope that before quoting.
Pricing for Home Additions & ADU in Southwest Ranches, FL
Here are the line-item ranges we quote for Home Additions & ADU work in Southwest Ranches. These are market-calibrated for this town, not pulled from a national database.
| Service | Southwest Ranches Price Range |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
The biggest cost drivers in Southwest Ranches are site prep, drainage, and the ag-zoning overlay. A flat lot with a high water table and an existing barn will run higher than a similar-sized lot in Pembroke Pines where you’re not fighting the Everglades at your foundation line. That’s not a markup. That’s the actual work required to pass inspection. We give you a written line-item quote before anything starts, and every change arrives as a written change order. No surprise invoices. Call (877) 610-1318 to schedule a free estimate, and we’ll walk your property before we put a number in front of you.
We Also Serve Cities Near Southwest Ranches
Our crews serve Home Additions & ADU in Southwest Ranches and the surrounding communities, including Cooper City, Pine Island Ridge, Pembroke Pines, and Weston. Dispatch and scheduling run through our Miami (South FL) office, but the people on your job are the same local crew members from the first walk-through to the final sign-off. If you’re on the edge of 33330 or just across the line in a neighboring town, we’ll still come give you a straight answer and a written quote.
Serving Southwest Ranches, FL - Our Local Coverage Area
We’re based in the Southwest Ranches 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 Southwest Ranches
Yes, in many cases a detached ADU on a property with an existing barn, stable, or arena will trigger an agricultural-structure review through the town’s zoning overlay, separate from Broward County’s standard building permit path. We coordinate both reviews from the first filing, so you’re not dealing with a stop-work order halfway through the job. Call (877) 610-1318 and we’ll check your specific lot before you spend anything on plans.
The water table is typically 18 to 36 inches below grade on the western edge of Southwest Ranches, which means below-grade construction is off the table and elevated slabs with engineered drainage become the default for most additions. For a second story, we usually confirm the existing slab can carry the new load before we design the vertical framing, and we bring in a dewatering plan if the county requires it. It’s an added cost, but it’s cheaper than a failed inspection.
Usually yes, but the $30,000-$80,000 range shifts upward if the garage was built before current HVHZ standards, because the county will likely require a roof system upgrade and impact-rated opening retrofits as a condition of the conversion permit. We’ll open up the walls and tell you what the inspector will see before we quote it, so the number you sign is the number you pay. Free estimates at (877) 610-1318.
A standard ADU pad here usually needs a perimeter swale, compacted fill to raise the slab above the seasonal water table, and sometimes a small retention area if the lot drains toward an existing structure. The exact design depends on your specific soil and grade, and we quote that as a line item in the estimate, not as a change order after the dig starts.
It can, mainly because Southwest Ranches properties are more likely to trigger the ag-zoning overlay review and the higher scrutiny that comes with building near Everglades conservation ground. The paperwork isn’t slower; there’s just more of it. We plan for that timeline in the schedule before you sign, so you’re not living in a construction zone longer than expected. Call (877) 610-1318 and we’ll give you an honest timeline for your specific property.
Get a Free Estimate for Home Additions & ADU in Southwest Ranches
If you’re planning an addition or ADU on a Southwest Ranches lot, the best first step is a free site walk. Tom Barrett or one of his sons will come out, look at your ground, check the setback lines and existing structures, and tell you what the county and the town are going to ask for before you spend a dollar. Then you’ll get a written, line-item quote with the permits, drainage, and ag-overlay work accounted for. No vague allowances. No surprises. Call (877) 610-1318 to schedule yours.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Southwest Ranches and surrounding Broward County communities.