ADU Company in San Antonio Heights, CA
Kitchen remodeling in San Antonio Heights usually means working inside a mid-century ranch or a custom foothill home built into a slope, where the existing layout was designed decades before anyone thought about open sightlines or a 36-inch range. We plan remodels around the realities of unincorporated San Bernardino County: septic setbacks, well lines, and a footprint that can’t always be expanded outward. When you’re ready to talk through your options, call us at (833) 589-8273.
Why San Antonio Heights Homes Are Different
San Antonio Heights sits above San Bernardino on the lower flanks of the San Gabriel foothills, and the housing stock reflects that geography. Lots are large, often an acre or more, with mature citrus and oaks that have had fifty years to establish root systems. Homes are a mix of 1950s and 60s ranch houses and newer custom builds, many of them stepped into the slope rather than sitting flat on a graded pad. That means foundations, drainage, and access for equipment all behave differently than they do on a flat city lot in Upland or Claremont.
The climate here is hot inland foothill, with summer heat that sits on the roof and Santa Ana winds that push hard from the northeast in fall. Any exterior work, from siding to a new ADU shell, has to answer to that combination plus the wildland-urban interface fire rules that San Bernardino County applies to unincorporated foothill communities. We plan for fire-resistant materials and defensible-space logic from the first design meeting, not as an afterthought.
Our Main San Antonio Heights Services
Most homeowners in San Antonio Heights reach out to us for one of two reasons: they want to add an ADU, or they want to fix a bathroom that has not changed since the original build. Both are covered in depth on their own pages.
ADU Builders in San Antonio Heights
Building an ADU in San Antonio Heights is a different process than in a city like Upland because the property is unincorporated. Permits go through San Bernardino County, and if the house is on septic, the existing system’s capacity has to be verified before the ADU can be approved. Sloped rear yards are common here, which pushes many projects toward a detached unit sited on the flattest usable part of the lot. We walk every client through the county’s specific requirements before any design gets locked in. See ADU Builders in San Antonio Heights for the full scope.
Bathroom Remodeling in San Antonio Heights
Bathrooms in San Antonio Heights tend to be original to homes built between 1955 and 1980, which means smaller footprints, cast-iron drain lines, and tile set on mud beds that have finally given up. On well and septic properties, we pay close attention to fixture selection and water pressure, since the well pump and pressure tank dictate what a new shower valve can actually deliver. Ventilation matters more here too, because the inland heat pushes moisture into walls faster than it does closer to the coast. Read the full breakdown at Bathroom Remodeling in San Antonio Heights.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Kitchen Remodeling in San Antonio Heights
Most kitchens in San Antonio Heights were built for a different era, with a closed-off footprint, a single wall of cabinets, and a ventilation setup that fights the inland heat instead of working with it. We remodel these spaces for how people actually cook now: more counter, better air movement, and a layout that connects to the rest of the house. Whether you’re planning an ADU with a full kitchen or refreshing the one in your main home, our approach pairs prefab sourcing with in-house finish work, so the same crew that handles your new ADU shell can build out its interior. If you want to see our broader kitchen capability, visit our Kitchen Remodeling page.
Full Kitchen Renovation
Signs you need it
The layout no longer works: one person can cook or one person can clean, but never both at once, and the cabinets are original to the house.
What it costs in San Antonio Heights
A full kitchen renovation in San Antonio Heights typically falls between $45,000 and $85,000 depending on cabinet quality, appliance level, and whether we are moving plumbing or gas lines.
How we do it
We start with a measured as-built, confirm what can move without hitting septic lines or load-bearing walls, order long-lead items, then gut and rebuild in phases so you retain a temporary cooking zone.
Cabinet Replacement and Countertops
Signs you need it
The cabinet boxes are still square but the doors are delaminating, the drawer slides are worn out, and the countertop is cracked or permanently stained.
What it costs in San Antonio Heights
Cabinet replacement and new countertops generally run from $15,000 to $35,000 in San Antonio Heights, with the range driven mostly by slab material and linear feet of uppers and lowers.
How we do it
We template the existing footprint, order the new boxes or doors, pull the old tops, and install the new surfaces after verifying the base cabinets are level and anchored.
Kitchen Island Additions
Signs you need it
You have a single-wall or L-shaped kitchen with open floor space, but no landing zone near the range or refrigerator and no seating where people actually gather.
What it costs in San Antonio Heights
Adding an island in San Antonio Heights usually costs between $8,000 and $20,000, depending on whether electrical or plumbing has to be extended beneath the slab.
How we do it
We confirm the slab thickness and any in-floor utilities, route the needed electrical or plumbing, set the island base, and top it with a single slab or butcher block in one clean pass.
What Kitchen Remodeling Costs in San Antonio Heights
| Item | Typical range in San Antonio Heights |
|---|---|
| Full kitchen renovation | $45,000 – $85,000 |
| Cabinet replacement and countertops | $15,000 – $35,000 |
| Kitchen island addition | $8,000 – $20,000 |
Do I need County permits to remodel a kitchen in San Antonio Heights?
If you are moving walls, altering the electrical panel, or changing gas lines, yes, San Bernardino County requires permits and inspections. A cabinet-for-cabinet replacement with no structural or utility changes usually does not, but call (833) 589-8273 and we will tell you exactly where your project falls.
How long does a kitchen remodel take in San Antonio Heights?
A full remodel typically runs 8 to 12 weeks from demo to final walkthrough, with cabinet lead time being the biggest variable. Countertop templating and county inspection scheduling can add a week or two on larger jobs. Call (833) 589-8273 for a timeline specific to your scope.
Brands We Service in San Antonio Heights
We work across the prefab ADU landscape, including Mighty Buildings, Boxabl, and Plant Prefab, and we are familiar with Tuff Shed for accessory structure shells. Because we are not married to one manufacturer, the recommendation you get is based on your lot, your septic or sewer situation, and your budget. See our brands for the full rundown.
Pricing for ADU Company in San Antonio Heights, CA
| Service | Typical range in San Antonio Heights |
|---|---|
| Full prefab ADU (turnkey) | $150,000 – $300,000+ |
| Site-built ADU (turnkey) | $250,000 – $450,000+ |
| Prefab ADU shell (client finishes) | $80,000 – $160,000 |
| Site-built ADU shell (client finishes) | $120,000 – $250,000 |
| Kitchen remodel (full renovation) | $45,000 – $85,000 |
| Kitchen remodel (cabinets and counters) | $15,000 – $35,000 |
| Kitchen island addition | $8,000 – $20,000 |
| Bathroom remodel (full) | $18,000 – $45,000 |
| Bathroom remodel (shower/tub replacement) | $8,000 – $18,000 |
In San Antonio Heights, the two biggest price drivers are septic capacity and slope. If your septic system needs a new leach field or an extension to serve the ADU, that can add $10,000 or more before we pour a single footing. On steep lots, retaining walls and deeper foundations push the number up quickly. We give you a written, line-item price before work starts, and we do not change it unless you change the scope.
Neighborhoods We Serve in San Antonio Heights
San Antonio Heights is not divided into the formal subdivisions you see in Upland or Rancho Cucamonga, but the work patterns are consistent. We serve every pocket of the 91784 ZIP code, from the flatter streets near the baseline up to the steeper lots that back directly against the foothill open space. Typical response time for an estimate visit in San Antonio Heights is one to three business days.
- Baseline foothill corridor
- Upper Euclid slope area
- North San Antonio canyon lots
- Mountain Avenue frontage
- Alpine Street area
Service Area – Cities Near San Antonio Heights
We also work throughout the surrounding foothill and valley communities. If you are in Upland, CA, Claremont, CA, Rancho Cucamonga, CA, or Montclair, CA, the same full-scope ADU and remodeling team covers your area under the same single-contract model.
Serving San Antonio Heights, CA — Our Local Coverage Area
We’re based in the San Antonio Heights 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 About ADU Company in San Antonio Heights
Yes. San Antonio Heights is unincorporated, so every ADU permit goes through San Bernardino County, not a city building department. We handle the submittal, the plan checks, the corrections, and the inspections from start to finish. You never have to stand at a county counter unless you want to.
Usually yes, but it depends on the existing system’s capacity and where the leach field sits. If the tank is too small for the added bedroom count, the county may require a system upgrade. We bring in a septic designer early so the ADU is sited correctly from day one.
We typically schedule kitchen remodels four to eight weeks out, mostly because cabinet and countertop lead times drive the calendar. If you are combining a kitchen remodel with an ADU build, we phase the two so your main home stays usable during the heavy structural work. Call (833) 589-8273 to lock in a start window.
Call Costa Mesa ADU Builders at (833) 589-8273 to schedule a free estimate for your San Antonio Heights ADU, kitchen, or bathroom project.
What happens when you call
- 1A real person answersNo phone trees — talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you — the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What San Antonio Heights Customers Say
"Sound insulation between the unit and the main house is better than I expected. You genuinely cannot hear the tenant."
— Imani Ellison"Every invoice was tied to a completed milestone, so I always knew what I was paying for."
— Gilbert Vargas"The kitchenette layout he suggested made better use of the space than the one on our original sketch."
— Ryan Padgett