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 Miramar
A full home addition or ADU in Miramar typically runs $45,000-$130,000 for a room addition, and $90,000-$220,000 for a new detached ADU built from the slab up. Those are Miramar-market numbers, not national averages, and they reflect what it actually costs to work on the CBS block homes that make up so much of the 33023 corridor. We’ve been pulling permits in Broward County since 1998, and we’ve spent enough time inside Miramar’s older east-side homes to know exactly what’s behind those walls before we ever put a saw to them. Call (877) 610-1318 and we’ll walk the property with you, talk through the scope, and put every number on paper before you commit to anything.
Why Barrett & Sons Construction Is Miramar’s Preferred Home Additions & ADU Company
We’re not a franchise with a call center in another state. Tom Barrett owns this company, his sons run the crews, and Tom’s name, address, and license number are published and verifiable. When you call about an ADU design or a second-story addition here in Miramar, the person who answers lives twenty minutes away and knows what a Federal Pacific panel looks like when it’s still feeding a 1963 ranch on Miramar Boulevard.
Homeowners in Miramar regularly tell us they got burned before: a national outfit quoted one number on the phone, then handed them a change-order stack at the end. That’s why every scope, every allowance, and every price change from us arrives as a written change order before work proceeds. The permit inspector works for you, not for me. Permits get pulled and inspections get signed on every eligible job, no exceptions, because the last contractor a lot of our Miramar customers used told them permits were optional. They’re not. Every completed job carries the 90-Day Done Right Promise, written on the contract, not buried in the fine print.
Our Home Additions & ADU Services in Miramar
ADU Design & Permitting
Before you build an accessory dwelling unit in Miramar, someone has to sort through Broward County’s zoning, setbacks, and the Florida Building Code’s High-Velocity Hurricane Zone requirements. In the older 33023 blocks, that usually means documenting whether the existing structure has hurricane straps or roof-to-wall ties at all. We handle the full design and permit package, including structural drawings and the tie-down retrofit scope if the county flags it.
Garage Conversion ADU
Converting a garage into a rentable ADU in Miramar runs $30,000-$80,000 depending on whether the slab is sound, the electrical panel can handle the new load, and whether the original garage was tied into the house’s HVHZ envelope. Many Miramar garages from the 1960s were built as afterthoughts, and we regularly find Zinsco or Federal Pacific panels that need to be replaced before any new circuit goes in. We scope that in writing up front, so there’s no surprise invoice during rough-in.
New Detached ADU
A new detached ADU in Miramar runs $90,000-$220,000. You’re not just framing walls; you’re dealing with a high water table that can rise within two to four feet of grade, which affects foundation design and drainage. You’re also pouring and strapping to HVHZ wind-load standards that are the strictest in the continental U.S. We’ve built these behind existing CBS homes across Miramar, and we know how to keep the new structure code-current while making it look like it belongs on the lot.
Junior ADU & Interior Conversion
A junior ADU, usually a converted bedroom with its own entrance and kitchenette, is the most cost-efficient path for Miramar homeowners who want rental income without pouring a new slab. Interior conversions of this kind still trigger electrical, egress, and sometimes fire-rating requirements under Broward County code. We scope those correctly the first time, so the permit review doesn’t bounce and stall your project for weeks.
If you’re adding a room or a second story, we also handle Home Additions & ADU work across the region, including full second-story additions over existing single-story CBS homes in eastern Miramar. And when the project grows into the rest of the house, we bring the same permit-and-written-scope discipline to Kitchen Remodeling in Miramar and Bathroom Remodeling in Miramar.
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 Miramar
We stock and install premium materials you can look up, not mystery brands off the back of a van. On ADU plumbing rough-ins and finished interiors, we run Grohe fixtures and Schluter systems for waterproofing in kitchens and baths. If your ADU project involves a new roof or tie-down work on the existing house, we use GAF products rated for Broward County’s HVHZ wind loads. That matters in Miramar, where a roof installed to anything less than current wind standards won’t pass inspection and shouldn’t be on your house.
Common Home Additions & ADU Problems We See in Miramar Homes
- Missing hurricane straps and clips. In the older blocks of 33023, it’s common to open a wall and find no hurricane clips at all connecting roof trusses to the CBS wall. That was the pre-Andrew norm, and it now triggers a full tie-down upgrade under Broward permit review. What the homeowner thought was a simple room addition becomes a structural retrofit, and we scope that before we cut anything.
- High water table under the slab. Miramar sits on a low-lying limestone shelf, and the water table can sit within two to four feet of grade in parts of the 33023 area. That directly affects any addition with below-grade plumbing, deepened footings, or drainage. We design around it from the start, not after the excavation floods.
- Aging Federal Pacific and Zinsco panels. Many Miramar homes from the 1950s and 1960s still run on these old panels, which are known failure points and often can’t legally serve the added load of an ADU. We flag a panel replacement in writing before electrical work starts.
- Pre-1994 window and opening standards. Original single-pane jalousie and awning windows are common in Miramar’s older CBS stock, and any addition that ties into the existing envelope has to bring those openings up to current impact-rated or shutter-compliant standards. That’s not a hidden charge; it’s code, and we tell you in the written scope.
Pricing for Home Additions & ADU in Miramar, FL
Let’s talk real numbers. A straightforward room addition on an existing slab in Miramar runs roughly $45,000-$130,000. A garage conversion ADU lands between $30,000 and $80,000, depending on panel and slab conditions. A new detached ADU, built to HVHZ code with its own utility connections, runs $90,000-$220,000. A junior ADU or interior conversion is the entry point at $9,000-$45,000 depending on scope. What shifts these numbers in Miramar specifically: whether we have to retrofit hurricane tie-downs into an existing 1960s CBS structure, whether the water table forces a raised foundation or engineered drainage, and whether your electrical panel has to come out. All of it goes in writing before work starts, as a change order if anything shifts. Call (877) 610-1318 for a free estimate on your specific project.
We Also Serve Cities Near Miramar
Our crews work across the south Broward area, including Andover, West Park, Hollywood, and West Hollywood. If your project is in one of those communities, the same written-scope and permit discipline applies. Learn more about our work across the broader area at Miramar, or ask us directly about your street when you call.
Serving Miramar, FL - Our Local Coverage Area
We’re based in the Miramar 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 Miramar
We can usually walk your Miramar property within a day or two of your call, and the design and permitting phase typically runs four to eight weeks depending on Broward County review load. We don’t promise same-day starts on construction projects; we promise a written scope and a real schedule. Call (877) 610-1318 to get your estimate started.
We cover the full 33023 corridor, from the older single-story CBS blocks near Miramar Boulevard through the newer western sections, and we serve all of Miramar plus Andover, West Park, Hollywood, and West Hollywood. The older east-side homes just require more retrofit planning, which we build into the written scope.
Not necessarily more than neighboring cities, but Miramar’s older CBS stock does add cost when hurricane tie-downs, panel replacements, or water-table drainage are triggered. A room addition in the 33023 area with a full tie-down retrofit can land near the top of the $45,000-$130,000 range. Call (877) 610-1318 and we’ll give you an exact number for your house, in writing.
Yes, permits are pulled and inspections are signed on every eligible job we do in Miramar. The permit inspector works for you, not for me. If a contractor tells you permits are optional on an ADU or addition, that’s a red flag.
Every completed job carries our 90-Day Done Right Promise in writing. If something isn’t right, one call brings Tom back to make it right. No fine print, no claim department. Call (877) 610-1318 for a free estimate and we’ll put the promise in your contract.
Ready to Plan Your Miramar Home Addition or ADU?
If you’re tired of quotes that change at the door, call Barrett & Sons Construction. We’ll walk your Miramar property, tell you what the scope really involves, and hand you a written line-item estimate before you sign anything. No trip charge inside the county, free second opinion on any written estimate, and a standing 10% discount for seniors and veterans. Reach Tom and the crew at (877) 610-1318.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Miramar, FL and the surrounding south Broward communities since 1998.