Cover Home Addition Contractor in San Antonio: What to Know First
We’re an independent Cover home addition contractor serving San Antonio, and we help Cover owners plan, permit, and build room additions, second-story additions, sunrooms, bathrooms, garage additions, and bump-outs that tie into their existing structure. Most Cover addition projects in San Antonio run $85,000 to $340,000 depending on square footage and site conditions, and we put that number in writing before any work starts. No verbal ballparks that drift, no change-order surprises at the door. If you own a Cover and you’re thinking about adding square footage, call (430) 258-2928 and we’ll walk you through what’s realistic on your lot.
This page is for San Antonio homeowners who already have a Cover home, or are comparing it against Abodu and Dvele, and want to know how a home addition actually gets done around one. We’ll cover the weak points we see on Cover units in this climate, what a build costs, and how our process works from first call to final inspection.
How Cover Products Fail – and How We Fix Them
Cover builds a solid panelized home, but every system has stress points, and San Antonio’s heat, humidity, and occasional freeze cycles find them. Here are the failure modes we see most often when we’re called in to assess a Cover unit ahead of an addition.
- Panel seam stress at the roofline (Cover S and Cover L series). San Antonio sees wild temperature swings: 100-degree days followed by 40-degree nights in the same week. The panels expand and contract, and over time the factory-applied seam sealant at the roofline can crack. We inspect the full seam line before tying any addition into the roof. If we find separation, we re-seal with a commercial-grade polyurethane that handles higher thermal movement than the original sealant. Skipping this step means a leak inside your new addition’s shared wall.
- MEP chase routing conflicts inside the wall cavity. Cover’s panelized system pre-runs mechanical, electrical, and plumbing chases through specific panels. When an addition needs new electrical sub-panel feeds or drain lines, you cannot just notch a panel wherever you want; the structural foam core doesn’t work like stick framing. We map the existing chases with a borescope before we cut, so we’re tying into the factory runs instead of fighting them. This saves thousands in rework and keeps the panel warranty intact.
- Flash-and-batt delamination in the ceiling assembly. Some earlier Cover units shipped with flash-and-batt insulation in the ceiling panels. In San Antonio’s humidity, the batt layer can slump or detach over a few summers. We open the ceiling during an addition and find thermal gaps the homeowner couldn’t see from the living room. Our fix is removing the failed batt, re-sealing the foam layer, and re-insulating to current San Antonio energy code before we tie the new space in.
- Sill plate and anchor issues on pier foundations. Cover homes often sit on concrete piers rather than a full slab. San Antonio’s expansive clay soil moves seasonally, and we’ve seen slight sill plate drift on units under six years old. Before any addition, we check for level and re-shim where needed. An addition built on an out-of-level base multiplies its problems in year one.
- Windows flashing failures at the head jamb. The factory window flashing performs fine in moderate climates, but San Antonio gets heavy, wind-driven rain in spring and fall. The head jamb flashing on some units isn’t deep enough, and water tracks in behind the exterior cladding. When we’re opening a wall for a bump-out or room addition, we inspect every nearby window and upgrade the head flashing to a 6-inch flexible membrane. It’s a cheap fix that prevents a five-figure water damage claim later.
Our Cover Home Addition Contractor Process
You’ll know exactly what’s happening, what it costs, and when it’s done. Here’s how a Cover addition runs with us from the first call:
- 1
Call and talk to a live person. You reach someone at (430) 258-2928 who can answer genuine questions, not route you to a voicemail. We’ll ask about your Cover model, lot, and what kind of addition you’re planning.
- 2
Site walk and panel assessment. We inspect your Cover’s existing panels, seams, foundation points, and MEP chases. This is where we catch the failure modes above before they become your addition’s problem.
- 3
Written price, flat and itemized. The number goes on paper first. Everything else follows from there. You’ll see line items for structure, finishes, permits, and site work. No allowance games, no “we’ll figure that out later.”
- 4
Permits and plans. We handle the drawings and the permit submittal. San Antonio’s permit process has its own rhythm, and we deal with it so you don’t have to sit in the Development Services office.
- 5
The build, tracked. You get real-time updates, photo proof of progress, and a digital invoice you can pay by link. Our technicians are background-checked and in uniform, every visit.
- 6
Final inspection and the 365-Day Done Right Promise. We walk the job with you, run the mechanical systems, and leave you with a written guarantee. If anything fails within a year, we come back and make it right.
What Cover Home Addition Contractor Costs in San Antonio
Full transparency, because you deserve the ballpark before you ever tap call. These are current San Antonio ranges for additions tied into an existing Cover home:
| Addition Type | Typical Range in San Antonio |
|---|---|
| Bump-out (single room, 50 – 100 sq ft) | $35,000 – $75,000 |
| Sunroom addition (120 – 200 sq ft) | $55,000 – $110,000 |
| Bathroom addition (including plumbing runs) | $45,000 – $90,000 |
| Garage addition (single bay, attached) | $60,000 – $130,000 |
| Room addition (200 – 400 sq ft) | $85,000 – $180,000 |
| Second-story addition (full or partial) | $150,000 – $340,000 |
What moves the price: foundation type (pier vs. slab), how much panel work we have to open, the MEP tie-in complexity, and finish level. A second story changes the structural load on your Cover’s existing panels, which means more engineering, which means a higher number. Call (430) 258-2928 for an exact quote on your spec. The estimate is free, and the number you get is the number you’ll see on the contract.
Why San Antonio Homeowners Call Benson ADU San Antonio for Cover Work
Most contractors in San Antonio don’t know what a Cover home is, let alone how to tie an addition into one without compromising the envelope. We work on these units monthly, and we also build with Abodu and Dvele, so when you’re weighing product options or living with one already, we can speak to the actual differences instead of guessing. Every job carries the Relay Visibility Guarantee: a written price before work starts, real-time tracking, and the 365-Day Done Right Promise. Troy Eastman started this business because he was tired of watching homeowners get burned by contractors who wouldn’t put a number on paper. That’s why our flat-fee conversations happen in the first meeting, and why the written guarantee is on every contract we sign. If a covered repair fails within a year, we come back free. That’s not a promo. It’s the deal.
FAQs
Generally, no. The factory warranty on your Cover’s original panels and structure remains intact as long as the addition doesn’t modify those panels in ways outside the manufacturer’s build tolerances. We’re an independent Cover service provider, not authorized by Cover, and we build additions that respect the original engineering. Before any work starts, we map what we’re touching and confirm it won’t conflict with your warranty terms. Call (430) 258-2928 and we’ll review your specific unit.
A bump-out or single-room addition typically takes 8 to 16 weeks from permit approval to final inspection. Second-story additions run longer, usually 5 to 8 months. We’ll give you a schedule in writing before work starts, and the real-time tracking means you’re never wondering whether crews showed up. Call (430) 258-2928 for a project timeline based on your scope.
It depends on what we’re doing. For structural panel work, we use materials engineered to match your Cover’s original panel system, bought from suppliers who certify their specs. For finishes, cladding, windows, and roofing, we in some cases prefer premium aftermarket products that hold up better in San Antonio’s climate than the factory-spec versions. We’ll show you both options with real prices and let you choose. No mystery markups.
Yes, for most single-story additions and bump-outs. The panelized design means we can section off the work area with temporary walls and weather barriers, so your living space stays sealed and usable. Second-story work sometimes requires brief periods where we’d ask you to vacate certain rooms. We’ll tell you exactly which days those are before we start.
We come back and fix it. Every job carries a written 365-Day Done Right Promise. If any covered work fails or isn’t right within a full year, Benson ADU San Antonio makes it right at no charge, and you get a free second visit. That guarantee is stamped on your contract, not buried in fine print. Call (430) 258-2928 anytime. A live person answers.
Written by Troy Eastman, Owner & Builder, Benson ADU San Antonio at Benson ADU San Antonio, serving San Antonio and nearby areas.
