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Cover Home Additions & ADU: The San Antonio Owner’s Guide
If you have a Cover home addition or ADU in San Antonio and a component has failed, we can usually source the right part and handle the repair or replacement. A full Cover home addition in San Antonio typically runs $45,000 to $130,000, while ADU construction lands between $90,000 and $220,000 depending on square footage, foundation work, and utility connections. Most owners discover a problem when something visible stops working: a door that won’t seal, a window that’s fogged, a cabinet that’s pulling off the wall, or tile that’s cracked along a seam. The first step is identifying whether you’re dealing with a cosmetic issue or a structural one. We’ll walk you through both below.
Which Cover Models This Applies To
Cover home additions and ADUs in San Antonio aren’t a single product line with engraved model numbers the way a furnace or water heater is. They’re structures built to plan, which means the “parts” are the individual systems inside: windows, doors, roofing, cabinetry, countertops, plumbing rough-ins, and electrical. What matters is measurement and specification, not a serial number. When we come out, we check three things: the type of material installed (vinyl vs. aluminum frame on windows, for example), the specific dimensions, and how the original piece was anchored. That tells us whether you have an off-the-shelf size or a custom-fabricated piece.
For Cover-built additions, the original materials usually came from a defined vendor list. That actually helps. If your kitchen cabinets are KraftMaid, we know the door profile, hinge type, and finish code to match a replacement. If the countertop is Cambria or Silestone, we can match the slab lot closely. The honest truth: aftermarket parts often outperform OEM here because the “OEM” was just whatever the original contractor sourced at the time. We’re an independent San Antonio contractor, not affiliated with Cover, which means we recommend the part that works best and keeps your structure sound, not the one that protects a corporate supply chain.
Styles & brands we work with
Signs Your Cover Home Additions & ADU Is Failing
Here’s what we see most often on Cover-built additions in San Antonio:
- Door or window seals failing, fogged glass, or visible condensation between panes. San Antonio’s heat and humidity cycles wear out weatherstripping fast. A fogged insulated glass unit means the seal is gone and the unit needs replacement, not just caulk.
- Tile cracking along floor seams or grout lines. Our clay-heavy soil moves. If the original slab pour wasn’t reinforced properly, you’ll see hairline cracks that widen over a year. This can point to settlement, which is a structural question, not a cosmetic one.
- Cabinet doors sagging, hinges pulling out, or drawer glides binding. Humidity swells cabinet boxes. Repeated swelling and shrinking strips the screw holes. Once the hinge is stripped, the fix is a fill-and-redrill or a new door, not a tighter screw.
- Drywall cracks at the corner where the addition ties into the main house. That seam is where different framing sections meet. If the addition wasn’t tied in with proper flashing and movement joints, you’ll get recurring cracks no matter how many times you patch.
- Musty smell or soft spots under flooring near exterior doors. Water is getting past the threshold or the flashing. In San Antonio’s summer storms, that’s a fast track to mold and subfloor rot.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
For San Antonio homeowners, a full Cover home addition replacement averages $45,000 to $130,000, and that covers a lot of ground. The range spans a single-room bump-out with basic finishes up to a multi-room primary suite addition with new plumbing and electrical. A larger ADU or a conversion of existing space lands between $30,000 and $220,000 depending on whether it’s a garage conversion or a ground-up build. Every quote we write in San Antonio is a line-item price: materials, labor, haul-away, and any permits required. You approve that number before we start. The invoice number matches the approved number. The 365-Day Done Right Promise means if the work isn’t right, we make it right, in writing, for a full year. No change orders, no surprise line items.
DIY or Call Us?
Some checks are safe and worth doing: look at whether doors and windows close square, check for visible water staining, and note where cracks are forming so you can describe them accurately when you call. What you shouldn’t do is open up walls where electrical or gas lines might be, or try to pull up flooring that could be holding a tile underlayment with asbestos-era materials. A failed sill plate under a load-bearing wall in a San Antonio addition is not a weekend fix. Luca Romano grew up in East Los Angeles and learned the trade at Los Angeles Trade-Technical College, and after all this time in construction, he still does a final walkthrough on every job himself. The craft comes first. Everything else follows. Call (432) 547-6806 if you’d rather have us put eyes on it before you touch anything.
FAQs
A properly built addition should last 30 to 50 years on the structure, with systems like windows, roofing, and HVAC components replaced every 10 to 20 years depending on San Antonio heat exposure and storm cycles.
Yes, in many cases. A failing door seal, a stripped hinge, or a cracked tile can be repaired without a full replacement, but the repair only holds if we address the underlying cause, like settlement or moisture intrusion. Call (432) 547-6806 and we’ll tell you straight.
A focused repair takes one day in most cases. A full addition rebuild runs four to eight weeks depending on scope, weather, and permit scheduling with the city of San Antonio.
We stock common hardware and materials from the brands used in most Cover projects, including KraftMaid cabinetry parts, Cambria and Silestone surface products, and standard window and door components. Custom-fabricated pieces are ordered once measurements are confirmed. Call (432) 547-6806 for a free estimate.
Written by Luca Romano, Owner, Sawyer Remodel San Antonio at Sawyer Remodel San Antonio, serving San Antonio and nearby areas.
