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 San Carlos Park
A detached ADU in San Carlos Park typically runs $90,000-$220,000, while a full home addition lands between $45,000 and $130,000 depending on square footage, foundation work, and how much wind-mitigation retrofitting your existing structure needs. If you live in the 33967 ZIP code, you already know the post-Ian rebuild rules changed everything about getting permits through Lee County. Call (877) 610-1318 and we’ll walk you through what your specific home will actually need.
Most homes here went up between the 1970s and the 1990s, which means they predate Florida’s 2002 Building Code. That’s not a small detail. It affects every addition, every garage conversion, every junior ADU we build in San Carlos Park, because the inspector will hold your new work to standards your existing walls never had to meet. We’re familiar with how that plays out in this neighborhood, and we plan for it from the first walkthrough.
Why Barrett & Sons Construction Is San Carlos Park’s Preferred Home Additions & ADU Company
Tom Barrett started this company in 1998, and his sons run the crews. You’ll see the same faces on day one, day forty, and the day the inspector signs off. That matters in San Carlos Park because the unincorporated Lee County permit process after Hurricane Ian hasn’t been fast, and you need a contractor who schedules around real inspection timelines, not a sales pitch that pretends the backlog doesn’t exist.
Every price change on our jobs arrives as a written change order before work starts. No surprise invoices at the end. The permit inspector works for you, not for me, and I like it that way. Our Home Additions & ADU team carries that same standard on every project in the 33967 area, from a garage conversion near Three Oaks Parkway to a second-story addition off Alico Road. We also publish Tom’s name, address, and license number, so you can look us up before you sign anything.
Our Home Additions & ADU Services in San Carlos Park
ADU Design & Permitting
Building an accessory dwelling unit in San Carlos Park means working through the Lee County Building Department, not a city office. We handle the full design and permitting package so you don’t sit on hold trying to decode current wind-load requirements. Our plans are engineered for the 150+ mph wind speeds Lee County now enforces, which keeps your permit review moving instead of bouncing back for revisions.
Garage Conversion ADU
A garage conversion in San Carlos Park typically runs $30,000-$80,000, and it’s one of the smartest ways to add a rental unit or in-law suite to a single-story CBS home. The catch here is that many original garages have slab elevations lower than the post-Ian water-table reality, so we frequently need to address grading and drainage before framing walls. We account for that in the written estimate, not after the concrete’s poured.
New Detached ADU
New detached ADUs in San Carlos Park start around $90,000 and run up to $220,000 depending on size, finishes, and site work. Given the flat, low-lying terrain and the way standing water collects after summer storms, we handle active dewatering during foundation work as standard practice, not an add-on. Your slab is engineered for the high water table, not just the structure above it.
Junior ADU & Interior Conversion
A Junior ADU built inside an existing home, usually a converted primary bedroom or bonus room, runs on the lower end of the $45,000-$130,000 home addition range in San Carlos Park. These projects still trigger Lee County’s current code requirements, especially if we’re touching plumbing or adding a kitchenette. We coordinate the inspections and keep the written change order trail clean from start to finish.
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 San Carlos Park
We install materials you can look up, not mystery brands off a van. On San Carlos Park additions and ADUs, that often means Andersen windows, GAF or CertainTeed roofing, and Belgard pavers on walkways and patio connections. If you’re pairing your addition with a new Kitchen Remodeling in San Carlos Park or a full Bathroom Remodeling in San Carlos Park, we carry the same premium-brand depth across every trade so the whole project matches.
Common Home Additions & ADU Problems We See in San Carlos Park Homes
- Original single-pane jalousie windows that won’t pass wind-mitigation. Homes built before 2002 in San Carlos Park commonly have aluminum-frame or jalousie windows that fail current Lee County requirements. Any addition that opens into or connects with existing exterior walls means those openings get flagged, and the fix becomes a necessary line item.
- Slab elevations too low for post-Ian drainage expectations. The flat, poorly draining interior of Lee County means water hangs around after storms. When we convert a garage or add a connected suite, we regularly find the existing slab needs a step-up transition or a moisture barrier before we can frame on top.
- Manufactured or mobile home connections that don’t meet current tie-down codes. A notable share of San Carlos Park’s housing stock is manufactured or mobile, much of it damaged or replaced after Ian. Connecting a site-built addition to that kind of structure requires engineering that accounts for both the new work and the existing unit’s foundation system.
- Permit timelines that get underestimated. Because San Carlos Park is unincorporated, everything goes through the Lee County Building Department. Post-Ian, that department has faced multi-month inspection backlogs. Locals know to pull permits early and pad the schedule. We build that into our project timeline from the first conversation, so you’re not living in a construction zone longer than promised.
Pricing for Home Additions & ADU in San Carlos Park, FL
A home addition in San Carlos Park runs $45,000-$130,000. A new detached ADU runs $90,000-$220,000. A garage conversion runs $30,000-$80,000. The biggest cost drivers in this ZIP code are wind-mitigation retrofits on the existing structure, foundation work around the high water table, and the Lee County permit and inspection cycle. A junior ADU built inside existing conditioned space lands on the lower end of that range. Every estimate we write is a fixed price with written change orders only, and we never quote one number on the phone and show up with another. Call (877) 610-1318 to schedule your free estimate.
We Also Serve Cities Near San Carlos Park
Besides working throughout San Carlos Park, we serve Estero, Fort Myers, Villas, and Cypress Lake. If you live near the county line or just across I-75, our Home Additions & ADU crew still handles your permit package through whichever jurisdiction applies, and we schedule around the same post-Ian realities.
Serving San Carlos Park, FL - Our Local Coverage Area
We’re based in the San Carlos Park 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 San Carlos Park
We can typically start within a few weeks of your signed contract and permit submission, but the Lee County Building Department’s post-Ian inspection backlog is the real variable. We pull permits early and pad the schedule so you’re working with realistic dates, not a sales promise. Call (877) 610-1318 for a project-specific timeline based on your scope.
Yes, we serve the entire 33967 ZIP code, including homes off Alico Road, Three Oaks Parkway, and the residential streets running east toward I-75. If you’re in San Carlos Park, we’re close by, and the free estimate includes a full site walk so we can assess drainage and existing-structure conditions before quoting.
In many cases, yes, and the reason is specific to San Carlos Park. Most of the housing stock predates Florida’s 2002 Building Code, so virtually every ADU or addition project carries additional wind-mitigation and water-intrusion compliance costs that incorporated neighbors with newer stock don’t always face. A detached ADU here typically runs $90,000-$220,000, and those code-driven upgrades are part of why the range runs wide. We show you every allowance and every compliance line item in writing before work begins. Call (877) 610-1318 for an exact quote.
Only if you change the scope. Any change, any allowance adjustment, any unforeseen condition, arrives as a written change order before work proceeds. That’s the Barrett & Sons rule, and it’s written on every contract. You won’t get a surprise invoice at the end because an allowance that isn’t on paper is a surprise waiting for a date.
Every job carries our 90-Day Done Right Promise, written on the contract. If it’s not done right, Tom comes back and makes it right, one call. We also stand behind the named-brand materials we install, including the window, roofing, and paver manufacturers we use on San Carlos Park projects. Call (877) 610-1318 to schedule a free estimate and see the warranty language in writing before you commit.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving San Carlos Park, FL.