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CWS Home Additions & ADU: The Tampa Owner’s Guide
A CWS home addition or ADU project in Tampa typically runs $45,000 to $130,000 installed, depending on square footage, foundation work, and whether you’re adding a detached unit with its own utilities. We stock CWS-compatible building components and run installation crews that know how these additions have to tie into existing Florida construction. Most owners call us when they realize a previous addition wasn’t permitted, wasn’t flashed correctly, or is now showing water intrusion at the seam where old framing meets new.
If you’ve got a CWS addition or ADU that’s showing its age, you’re not looking for a handyman with a truck. You’re looking for a contractor who can open up the wall, find what the last guy did wrong, and fix it so it stays fixed. That’s the work we do.
Which CWS Models This Applies To
Bradford Remodeling Co Tampa is an independent service provider, not affiliated with CWS. We work on CWS additions and ADUs across the Tampa market, including the detached unit styles common in Seminole Heights and the garage-conversion-to-ADU setups we see throughout West Tampa.
The compatibility question that matters most is how your CWS addition was originally framed and tied to the main structure. CWS additions built in the last ten years generally use engineered trusses and a 2×6 exterior wall assembly, but older CWS work in Tampa sometimes has 2×4 framing with a stucco finish that hides water damage until the substrate is already soft. Before we write any number, we pull the original permit records and check what’s actually behind the wall. That’s not a formality. It’s the difference between a quote that holds and a surprise change order nobody warned you about.
For OEM versus aftermarket components, the honest answer is that most structural lumber and sheathing has no meaningful “OEM” equivalent, but doors, windows, and roofing materials do. We recommend matching your CWS addition’s existing window line with the same manufacturer if that manufacturer still exists and still warrants the product. If not, we spec a documented equivalent and put that substitution in writing before any work starts. No surprises at close-out.
Styles & brands we work with
Signs Your CWS Home Additions & ADU Is Failing
- Water staining at the seam where the addition meets the original house. This is almost always a failed flashing detail or an improper tie-in. Tampa’s rainy season finds that seam fast.
- Cracks running diagonally from window and door corners. This usually points to settlement or a foundation issue that the original CWS footer didn’t account for in Florida’s sandy soil.
- Mold smell that comes and goes with the humidity. If the addition’s crawlspace or floor assembly wasn’t properly ventilated, Tampa’s moisture loads will force that smell out eventually.
- Doors that stick in summer but close fine in winter. Interior doors binding with the season suggests the addition is moving independently from the main structure, which means the framing connection is failing.
- Utility bills that spike every August. A CWS addition with inadequate insulation or poorly sealed penetrations costs you real money in cooling load. We see this in older ADUs all over Tampa.
Each of these has a specific cause, and that cause determines the fix. We don’t patch over symptoms.
Replacement Cost & What’s Included
Here’s the honest math for CWS addition and ADU repair work in Tampa.
| Scope | Typical Installed Range |
|---|---|
| Full CWS home addition (framing, roof tie-in, finish) | $45,000 – $130,000 |
| ADU construction (detached, with utilities) | $90,000 – $220,000 |
| Garage conversion to living space | $30,000 – $80,000 |
| Partial repair of failing addition (roof seam, flashing, structural tie) | $8,000 – $25,000 |
What drives the range is square footage, condition of the existing structure, access to the back of the lot, and whether we’re pulling permits for a fresh addition or repairing one that was never done to code. Every quote we write includes a line-item breakdown: lumber, fasteners, flashing, sheathing, windows, doors, roofing tie-in, and labor. You’ll know what everything costs before you sign.
Every project carries the 365-Day Done Right Promise. If the work fails inside that window, we come back and correct it at no charge. That guarantee is in writing.
See the difference
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AfterDIY or Call Us?
If you’re replacing a door handle or re-caulking a tub, that’s homeowner work. But a CWS addition or ADU that’s failing structurally is not a weekend project. Once you’re opening walls, pulling sheathing, or touching the roof-to-wall connection, you’re into load-bearing territory. A wrong cut doesn’t just look bad. It compromises the envelope of your house, and in Florida’s wind and rain, that becomes a problem fast.
What we’d rather you do is write down what you’re seeing: where the water shows up, when the door sticks, which rooms stay hot. Photograph it. Then call us at (941) 655-9297 and we’ll send someone who knows what they’re looking at. The estimate is free.
FAQs
With proper framing techniques, correct flashing, and Florida-appropriate materials, a well-built addition should still be structurally sound at 40 to 50 years, though roof coverings, windows, and exterior paint cycles will need replacement sooner. Tampa’s humidity and intense UV exposure accelerate wear on anything exposed to weather. If your addition is showing structural problems in under 15 years, something was wrong with the original build.
Most failing additions can be repaired if the foundation is sound and the framing hasn’t been compromised by long-term water exposure. What we typically do is open the affected area, remove rotted substrate, replace damaged framing, re-flash the tie-in correctly, and verify the connection to the main house. Full teardown is rare and usually only necessary when the footer itself has failed. Call (941) 655-9297 and we’ll tell you which situation you’re in.
Most CWS addition repairs take two to three weeks. A full addition or ADU build runs three to six months depending on permitting, foundation work, and the scope of interior finish. We give you a written schedule alongside the written price, and we stick to both.
We maintain working inventory of common structural components: dimensional lumber, engineered lumber, flashing, sheathing, and fasteners rated for Florida’s wind and moisture codes. For finished materials, we work from a documented roster of name-brand products including KraftMaid, Cambria, and Silestone, so you always know what’s going into your home and who manufactured it.
Call Bradford Remodeling Co Tampa
If your CWS addition or ADU is showing signs of failure, don’t wait for the next storm season to find the weak spot. Curtis Lane and the Bradford Remodeling Co Tampa crew serve homeowners across Tampa, including the older bungalow neighborhoods like Seminole Heights where we’ve spent years correcting questionable tie-ins and overloaded framing. Straight number, clear scope, no surprises at close-out.
Call us at (941) 655-9297 for a free estimate on your CWS home addition or ADU work in Tampa.
Written by Curtis Lane, Owner, Bradford Remodeling Co Tampa at Bradford Remodeling Co Tampa, serving Tampa and nearby areas.
