ADU Company in San Antonio Heights, CA
Kitchen remodeling in San Antonio Heights usually means working inside a custom home built between the 1950s and 1980s, often on a terraced lot where the garage sits below the main house and every material delivery has to navigate a steep driveway. We’re Home Base ADU Builders, and we’ve served San Antonio Heights since 2016, handling kitchen remodels, ADU construction, and bathroom work across this foothill community. Call (866) 403-9834 to talk through your project and get a free estimate.
Why San Antonio Heights Homes Are Different
San Antonio Heights is unincorporated San Bernardino County, where nearly every residential lot has some degree of slope. The homes here were largely custom-built from the 1950s through the 1980s, which means floor plans vary wildly from house to house. There is no cookie-cutter tract layout to fall back on. When we open up a San Antonio Heights kitchen, we regularly find framing that was modified decades ago without permits, electrical panels that predate modern code, and plumbing runs that follow the contours of the hillside rather than any logical grid.
The climate adds another layer. San Antonio Heights sits in a Very High Fire Hazard Severity Zone, with hot, dry summers and Santa Ana winds that push fire risk from late summer through fall. Any remodel that touches exterior walls, windows, or ventilation has to meet Chapter 7A wildland-urban interface standards. That means ember-resistant vents, fire-rated siding where applicable, and careful material choices. James Hardie fiber-cement products come up frequently in our San Antonio Heights projects because they meet the fire-resistance bar while holding up to the sun exposure these foothill homes get.
Permitting runs through San Bernardino County, not a city building department. For ADUs specifically, hillside grading review and fire clearance can add months to a timeline. For kitchen remodels, the county review is typically faster, but older hillside homes still trigger structural checks that a flat-lot house in Upland or Claremont would not face. We work through those requirements as part of the job, so homeowners are not left chasing county reviewers on their own.
Our Main San Antonio Heights Services
San Antonio Heights homeowners call us most often about two projects: building an ADU on a sloped lot, and updating bathrooms in homes that have not been touched in decades. Here’s what each looks like in this specific community.
ADU Builders in San Antonio Heights
ADUs in San Antonio Heights are almost always hillside builds. Flat-lot prefab installations that work fine in Rancho Cucamonga often need pier-and-beam foundations, retaining walls, and drainage engineering here. Many lots in the 91784 ZIP also rely on septic systems, and adding a dwelling unit can trigger a septic upgrade requirement that changes the budget completely. We work with prefab manufacturers like Abodu, Cover, and Tuff Shed, and we handle the county grading review, fire clearance, and site preparation that these foothill lots demand. ADU Builders in San Antonio Heights covers the full process, from septic evaluation through final inspection.
Bathroom Remodeling in San Antonio Heights
Bathrooms in these 1950s-to-1980s custom homes tend to be small, with original cast-iron plumbing and tile set on mud beds that have cracked with the hillside’s slow movement. We regularly replace galvanized supply lines and redo shower pans that have been leaking into the subfloor for years. The sloped lots affect bathroom work too: waste lines have to follow the terrain, and venting often needs creative routing through rooflines that sit at different elevations. Bathroom Remodeling in San Antonio Heights explains the scope and pricing in detail.
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
Kitchen remodeling in San Antonio Heights is rarely a cosmetic refresh. The custom homes from the 1950s through 1980s usually have original electrical panels that cannot support modern appliance loads, galvanized plumbing that has corroded from decades of foothill hard water, and layouts that never anticipated today’s kitchen workflow. We plan around the terrain too: material deliveries on steep, terraced lots mean staging areas have to be thought through in advance, and access for debris removal can be tight when the garage is at street level and the kitchen sits uphill. For a deeper look at our kitchen process, see our Kitchen Remodeling hub page.
Full Kitchen Gut and Rebuild
Signs you need it
Cabinet boxes are delaminating, the floor sags under the refrigerator, or you can count the outlets in the room on one hand and half of them are ungrounded.
What it costs in San Antonio Heights
A full gut and rebuild in San Antonio Heights typically runs $45,000 to $85,000, with hillside access and county requirements pushing some projects higher.
How we do it
We strip the room to framing and subfloor, then rebuild with new electrical circuits, PEX supply lines, and James Hardie exterior materials where the kitchen wall transitions to outdoor exposure.
Cabinet and Countertop Replacement
Signs you need it
Drawer slides are failing, cabinet frames have water damage from years of leaks, or the countertop is cracked and stained beyond refinishing.
What it costs in San Antonio Heights
Cabinet and countertop replacement in San Antonio Heights typically falls between $15,000 and $30,000 depending on material grade and whether the existing boxes can be salvaged.
How we do it
We measure the full run, order semi-custom or custom boxes sized for the room, install and level them on the existing floor plane, and finish with new countertops and a tile backsplash.
What Kitchen Remodeling Costs in San Antonio Heights
| Item | Typical range in San Antonio Heights |
| Full kitchen gut and rebuild | $45,000 – $85,000 |
| Cabinet and countertop replacement | $15,000 – $30,000 |
| Electrical and plumbing upgrades only | $8,000 – $18,000 |
Hillside access, county permit review, and Chapter 7A fire-code upgrades on exterior-facing walls are the three biggest price movers we see in San Antonio Heights. Every estimate we give is a written line-item quote, and we do not change the price once the job is underway unless you change the scope.
How long does a kitchen remodel take in San Antonio Heights?
A full kitchen remodel in San Antonio Heights typically takes 6 to 10 weeks, depending on county permit timing and whether structural or fire-code work is required. Cabinet-only jobs run 2 to 4 weeks.
Will the price change once the work starts?
No. We write fixed-price contracts with line-item detail, and the only thing that changes the number is a change you request after work begins. Call (866) 403-9834 for an exact quote on your San Antonio Heights kitchen.
Brands We Service in San Antonio Heights
We work hands-on with a curated set of prefab ADU brands, including Boxabl, Plant Prefab, and Tuff Shed, and we use James Hardie fiber-cement products for exterior finishes on San Antonio Heights homes. Because we are brand-agnostic, our recommendations come from your lot, budget, and timeline. See our brands for the full comparison.
Pricing for ADU Company in San Antonio Heights, CA
| Service | Typical range in San Antonio Heights |
| Full kitchen gut and rebuild | $45,000 – $85,000 |
| Cabinet and countertop replacement | $15,000 – $30,000 |
| Kitchen electrical and plumbing upgrades | $8,000 – $18,000 |
| Tuff Shed-based ADU conversion | $80,000 – $150,000 |
| Mid-range prefab ADU (Abodu, Boxabl, Plant Prefab) | $180,000 – $350,000 |
| Premium prefab ADU (Dvele, Cover) | $350,000 – $600,000+ |
| Hillside foundation and retaining work | $20,000 – $60,000 |
| Septic system upgrade (when required) | $15,000 – $40,000 |
The two things that push ADU and remodel pricing upward in San Antonio Heights more than anywhere else we work are hillside engineering and county permitting timelines. When a project needs pier-and-beam foundations, retaining walls, or a septic upgrade, those are hard costs that no contractor can absorb. What we do control is the quote itself: written, line-item, and fixed once you approve it.
Neighborhoods We Serve in San Antonio Heights
We work throughout the 91784 ZIP and the surrounding foothill streets of San Antonio Heights, including the older custom-home pockets along Euclid Avenue and the terraced lots above 24th Street. Response time for estimates in this area is typically 2 to 4 business days, depending on our current project load.
- Euclid Avenue corridor
- 24th Street foothill lots
- Mills Avenue area
- Carnelian Street neighborhood
- San Antonio Heights north slope
Service Area – Cities Near San Antonio Heights
Home Base ADU Builders works across the foothill and valley communities near San Antonio Heights. We also serve Upland, CA, Claremont, CA, Rancho Cucamonga, CA, and Montclair, CA. Each city has its own permit path and terrain profile, and we adjust our approach accordingly.
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. All kitchen remodels, ADU construction, and bathroom work in San Antonio Heights goes through San Bernardino County, and we handle the full permit process, including hillside grading review and fire clearance when they apply.
Any work on exterior walls, windows, vents, or roofing must meet Chapter 7A wildland-urban interface standards. We specify ember-resistant vents and fire-rated materials as part of the design, so the county review moves without surprises.
Yes. We evaluate the existing septic system early in the design process, because adding an ADU often triggers a county-required septic upgrade. That evaluation happens before we lock your budget, so you know the full cost upfront. Call (866) 403-9834 to schedule a free estimate and site walk.
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
"Unit came out great and the tenant is happy. The timeline ran long, largely because of how slow the city was on plan check, though a couple of the delays were scheduling on their end."
— Robert Hayes"Detached unit in the back yard. Utilities trenched, separate meter, and it passed final on the first inspection."
— Colleen Pruitt"Knew the local setback and parking rules cold, which saved us from designing something that would never have been approved."
— Priya Mehta