Cover ADU in San Antonio, CA | Ellery ADU Studio
We provide independent Cover ADU service across San Antonio, from the older concrete-block neighborhoods inside Loop 410 to the far West Side near Lackland, and can also handle Cover repair in Austin. Cover builds a genuinely precise panelized shell, but the steel subfloor and integrated mechanicals need a different kind of attention here than they do in, say, coastal California. Our crew has installed and serviced Cover units in San Antonio since the brand’s first Texas shipments, and the one thing that separates our work is this: we engineer for clay soil and 100-degree heat, not for the factory’s assumptions. If your Cover is underperforming, call (971) 497-2402 and we’ll tell you what’s actually happening.
Why San Antonio Residents Choose Us for Cover Service
We’re not a manufacturer-authorized shop, and that’s on purpose. Cover’s own service network is thin in Texas, and the factory doesn’t know that a caliche shelf six feet down in Highland Hills changes how a crane pad has to be staged. We do. Our crew has worked on Cover sales & service issues from panel seam cracks to condenser faults, and we’ve done it in the specific conditions San Antonio throws at a prefab unit.
Nadia Ellery founded this studio in 2015 and spent her early years in Silver Lake, where small parcels and underused garages were the norm long before ADUs had a name. That background shapes how we approach Cover work: we look at the permit set, the slab, and the mechanicals as one system, not three separate line items. When we service a Cover unit in San Antonio, we’re checking how the whole assembly behaves on your lot, not just swapping a part and leaving. Every visit includes a documented photo record, and every recommendation comes with a written scope and a fixed price before any work starts.
Common Cover ADU Problems We Solve in San Antonio

- Panel seam cracks from clay soil movement. Cover’s steel subfloor pans transfer ground movement efficiently, so over San Antonio’s expansive clay, we see hairline cracks at panel seams and minor racking at door frames within the first few wet-dry cycles when the slab wasn’t engineered with deep piers. This shows up most around Harlandale and Highland Hills, where the 1940s and 1950s lots sit on heavier clay.
- Mini-split high-pressure faults in summer. The integrated mini-split in Cover units is sized for moderate climates. By late July, the condenser frequently short-cycles and throws high-pressure faults when ambient temps exceed 100°F, especially on west-facing walls. We’ve diagnosed this exact issue on a 104-degree afternoon in Prospect Hill.
- Interior condensation and sill-corner mold. Cover’s all-electric, low-air-infiltration envelope traps humidity in our Gulf-humid summers. That leads to condensation on interior window frames and occasional mold at sill corners in unvented units, particularly when the bathroom fan isn’t running enough.
- Crane pad failures during delivery. On the older South Side, the crane’s outrigger pads sink into caliche-rich topsoil, requiring steel plates or a more carefully staged pad than Cover’s standard install guide assumes. We plan for this before the truck ever arrives.
- Mi-matched condenser installs from other contractors. We’ve seen builders tap the main house’s 2-ton condenser instead of using Cover’s dedicated inverter. The unit yearns for its own circuit and line-set, and it lets you know by August.
Cover Service in San Antonio: What Local Conditions Mean for Your Equipment
Inside Loop 410, the city’s ADU-Allowed zoning over 6,000-square-foot lots is loaded with pre-1970 concrete-block garages that predate the current setback rules. That means a Cover unit placed on an existing slab often can’t meet the city’s requirement that the ADU be no closer to the rear lot line than the main house. Our permit work hinges on a variance argument the north-side suburbs never face, and that’s the information gap most out-of-town installers miss entirely. On West Mally Boulevard in Prospect Hill, our tech diagnosed a Cover Two with a persistent high-pressure fault on a 104-degree afternoon; the homeowner’s builder had tried tapping into the main house’s 2-ton condenser instead of using Cover’s dedicated inverter. We pulled a new 30-amp circuit, set a proper line-set through the rear parapet, and replaced the mismatched condenser with a correctly matched unit, and the complaint never returned that summer. That’s the difference between knowing Cover’s panel tolerances and knowing how they behave on a San Antonio lot with rear-setback issues and a brutal west sun load. When we service your Cover, we’re checking both.
Cover Models & Products We Service in San Antonio

We work on the full Cover line: the S-Series Studio, Cover One, Cover Two, and the C-Series Compact. For any replacement shell work, we use genuine Cover panels and edge trim because the proprietary steel profile doesn’t tolerate aftermarket substitutes; that’s a non-negotiable we’ve learned the hard way. But electrical components like the mini-split, breakers, and disconnects get swapped with equivalent UL-listed parts. We’d rather replace a failed component in two days than spend two weeks trying to repair a proprietary board that was never meant to be field-serviced. We keep common condensers, disconnects, and line-set fittings on hand for faster San Antonio turnaround, and anything Cover-specific is ordered direct.
Cover Service Pricing in San Antonio
Service calls in San Antonio typically run $180 to $340 for diagnosis, which includes the travel, the inspection, and a written photo record of what we found. If you approve a repair, that diagnosis fee rolls into the work. Panel seam repairs on a Cover unit generally run $600 to $1,400 depending on how many seams and whether we’re re-taping and re-finishing interior drywall. A full mini-split replacement with a properly matched inverter, new line-set, and dedicated circuit typically runs $4,200 to $6,800 all-in. Foundation remediation for slab movement, when the piers weren’t deep enough, starts around $3,500 and goes up from there; that’s a San Antonio-specific line item most generic ADU shops won’t even mention. Every quote is written, fixed, and in your hands before work begins. Call (971) 497-2402 for a free estimate.
Serving San Antonio, TX - Our Local Coverage Area

We’re based in the San Antonio 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 - Cover ADU in San Antonio
No, not if the HOA covenant explicitly prohibits accessory structures; San Antonio’s city zoning can’t override a private deed restriction. We can review your HOA’s CC&Rs and tell you within a day whether a variance or board appeal is viable. Most north-side HOAs in Stone Oak and Alamo Ranch are firm on this, which is why most viable Cover work sits inside Loop 410. Call (971) 497-2402 if you want a straight read on your specific covenants.
It can, and we’ve seen it happen on slabs poured without deep piers or post-tension engineering. San Antonio’s shrink-swell clay moves aggressively through boom-bust rain cycles, and Cover’s steel pan doesn’t flex; it transfers that movement to the panel seams. If you’re planning a new Cover install, or considering a New Detached ADU in San Antonio, the foundation design is where we start, not an afterthought.
Not as an attached structure, no. San Antonio won’t legalize a new Cover unit bolted to an unpermitted casita that was never inspected. What we often do instead is use the existing casita’s footprint for the Cover slab, legalize the site work, and bring the old structure up to current code as part of the same permit set, similar to our Garage Conversion ADU in San Antonio. It’s a sequencing question, not a dead end.
Yes, directly. San Antonio requires the property owner to live on-site, either in the main house or the ADU, which means the military PCS rental cycle near Lackland AFB is only available to you if you’re living in one of the two units. We get this question weekly from investors who bought a Cover with rental math in mind, and the rule changes the whole calculation. If you’re an established owner-occupant, a permitted casita rents quickly and at a premium. Call (971) 497-2402 to talk through the specifics, including which lot uses qualify.
Yes, it will, and the integrated condenser will fight you every afternoon. That mirrored glazing loads the interior with solar gain while the west-facing condenser bakes in direct sun, and the high-pressure faults start showing up by late June. We usually solve this with shading, window film, and, where needed, relocating or upgrading the condenser. Estimates are free; call (971) 497-2402 for the exact fix and price.
Service Areas Near San Antonio

From our San Antonio base, we run Cover service across the metro and into the corridor cities. That includes San Antonio service area neighborhoods like Harlandale, Prospect Hill, and Highland Hills, plus Stone Oak, Helotes, and Alamo Ranch on the north side. For clients with projects in California, we also coordinate through our Cover service in San Diego team and our Cover service in Dallas network in Texas.
Book Your Cover Service in San Antonio Today
Tell us what the Cover is doing and we’ll give you a date and a written price, not a vague promise. Call (971) 497-2402 and a live person answers. We’ll set the visit, diagnose it properly, and hand you a photo record and a fixed quote before any work starts.
Written by Nadia Ellery, Principal at Ellery ADU Studio, serving San Antonio since 2015.