Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across San Antonio Heights
General contractor work in San Antonio Heights runs $14,000 to $45,000 for a kitchen remodel and $45,000 to $130,000 for a home addition, with project calendars set by long-lead materials rather than crew availability. We serve the entire 91784 zip code and know the difference between building here in the unincorporated foothills and building down on flat Upland lots. If you’re planning a remodel or addition in San Antonio Heights, call (866) 925-0334 for a free estimate and a written scope before any material gets ordered.
Why Millwright Builders Is San Antonio Heights’s Preferred General Contractor Company
San Antonio Heights homeowners call us because we understand that construction up here is hillside engineering, not tract-home carpentry. We’ve worked on mid-century ranch homes and custom builds along the San Gabriel Mountain edge, where decomposed granite soil, sloped lots, and county fire standards shape every foundation, retaining wall, and roofline decision. Noel Castañeda leads the team, and he’s direct about what a job requires: engineered drainage, ignition-resistant assemblies, or caisson footings pinned to rock. No sugarcoating, no change orders discovered halfway through.
Our reputation in San Antonio Heights comes from doing what we say when we say it. Homeowners here have asked us to fix work from other contractors who treated a hillside lot like a flat one and saw retaining walls move after the first rainy season. We don’t make that mistake because we plan for the decomposed granite before we pour anything.
Styles & brands we work with
General Contractor Services in San Antonio Heights
General Contractor Services in San Antonio Heights cover the full built environment of a home, from structural renovation and roofing to kitchen finishes, hardscape, and ADU additions under one accountable roof. When a San Antonio Heights homeowner calls us, they’re not looking for a single-trade specialist. They want one contract, one point of accountability, and a builder who can coordinate structural, fire-safety, and finish work without forcing the client to become a project manager.
Kitchen remodels here typically land between $14,000 and $45,000 depending on cabinet grade, countertop selection, and whether we’re addressing the original 1960s wiring and plumbing while walls are open. A bathroom remodel runs $9,000 to $28,000. Because we source cabinetry from brands like KraftMaid and countertops from Cambria, Caesarstone, and Silestone, you’re choosing from materials with real performance trade-offs, not whatever ships fastest from a builder supply house.
Whole-Home Coordination
On a San Antonio Heights property, a whole-home remodel may require roofing, windows, siding, foundation work, and finishes all permitted through San Bernardino County at once. We sequence that work so inspections don’t stall the schedule and long-lead items are ordered early enough that the tile setter never waits on the cabinet shop.
Custom Cabinetry and Stone
Cabinet installation in San Antonio Heights costs $4,000 to $13,000, and countertop installation $2,000 to $6,500. The real cost driver is lead time: a custom Cambria slab or a KraftMaid order can take weeks. We order only after the written scope and allowances are signed, so you’re never locked into a non-refundable purchase that no longer matches the design.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Construction Company in San Antonio Heights
Construction Company work in San Antonio Heights means navigating San Bernardino County permits, county fire ignition-resistant construction review, and hillside geotechnical requirements on the same project. Additions run $45,000 to $130,000, and ADU construction $90,000 to $220,000, but the bigger variable is engineering: pier and caisson foundations on sloped lots, retaining walls with proper drainage, and defensible-space clearing that satisfies the fire department before framing starts.
We’ve built additions on foothill lots where the county required a soils report before we could pull the grading permit. We handle that. We also handle the coordination with a sales engineer or architect if the homeowner has one on the project. Your renovation shouldn’t require you to become a project manager.
Home Additions and ADUs
On a sloped San Antonio Heights lot, a room addition often needs a caisson foundation that gets pinned to bedrock. We engineer for that from the first site visit, so the foundation doesn’t shift when the winter rains saturate the decomposed granite. ADU construction on these lots follows the same playbook, with added fire-hardening requirements on exterior materials and venting.
Roofing and Exterior Envelope
Roof replacement in San Antonio Heights runs $8,000 to $20,000, and because this is a high-fire-severity zone, we specify Class A rated materials from GAF, CertainTeed, and Owens Corning. Impact windows, fire-resistant siding, and ember-proof venting aren’t upsells here. They’re what the county fire department will be checking when the inspection comes.
Trusted Brands We Service in San Antonio Heights
Millwright Builders works with more than 50 name-brand manufacturers across cabinetry, countertops, roofing, windows, doors, plumbing fixtures, fencing, hardscape, and siding. For San Antonio Heights customers, that means we stock and source Grohe plumbing fixtures, GAF and CertainTeed roofing systems, and Owens Corning insulation and shingle products. We specify the brand, explain the trade-off, and stand behind the install. Every product we install, we’ve vetted, not just stocked. When a homeowner asks why one shingle line costs more than another, we can tell them how it performs in Santa Ana wind conditions and high-heat summers, not just read the box copy back.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in San Antonio Heights Homes
- Original 1940s-to-1970s systems still in place. Much of the housing stock in San Antonio Heights has original plumbing, electrical panels, and roof structures now due for replacement. A remodel that doesn’t plan for a service panel upgrade or cast-iron drain replacement is a remodel that stalls the week of rough-in.
- Hillside drainage treated as an afterthought. Decomposed granite soil shifts when it gets saturated. We regularly see retaining walls with no weep holes or French drains that start leaning within two winters. Our scopes include engineered drainage before the wall goes up.
- Custom materials ordered before the written scope is signed. A homeowner falls in love with a Cambria slab or a KraftMaid cabinet line, the order goes in as non-refundable, and then the design changes. We never order long-lead items until the full scope and allowances are in writing.
- County fire standards discovered at inspection. San Antonio Heights sits in a high-fire-severity zone, and San Bernardino County fire enforces ignition-resistant construction on remodels and additions. Missing those requirements means failed inspections and a schedule that slips by weeks. We build them into the permit drawings from day one.
Pricing for General Contractor in San Antonio Heights, CA
Here’s what we see on San Antonio Heights projects. These ranges reflect hillside engineering, county permitting, and material-grade choices common to this market:
| Project | Typical Range in San Antonio Heights |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Cabinet Installation | $4,000 – $13,000 |
| Countertop Installation | $2,000 – $6,500 |
| Bathroom Remodel | $9,000 – $28,000 |
What moves the cost up or down on a hillside lot: geotechnical work, caisson count, drainage scope, and whether the county requires a soils report. We put the entire scope and allowances in writing before ordering anything. Call (866) 925-0334 for a line-item estimate; it’s free, and you’ll know exactly where every dollar goes.
We Also Serve Cities Near San Antonio Heights
Millwright Builders also serves San Antonio Heights homeowners alongside our work in Upland, Claremont, Rancho Cucamonga, and Montclair. If you’re planning a remodel or addition anywhere in the foothill corridor or the valley below, our General Contractor team can give you the same written scope and licensed accountability we bring to every San Antonio Heights project.
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 General Contractor in San Antonio Heights
Yes, most hillside additions in San Antonio Heights require caisson foundations or a geotechnical engineer’s alternative because the decomposed granite soil sits on slope and shifts with winter saturation. The county will typically require a soils report before a grading permit is issued. Call (866) 925-0334 and we’ll tell you whether your specific lot will need caissons, helical piers, or a standard footing based on the slope and soil report.
San Bernardino County issues all building permits for San Antonio Heights because the community is unincorporated. That means county fire adds ignition-resistant construction review on remodels and additions, and county inspectors handle sign-offs. We pull the permits, schedule the inspections, and keep a running punch list so the draw schedule aligns with long-lead deliveries.
A custom cabinet line like KraftMaid or a Cambria countertop slab can take weeks from order to delivery, and those lead times set the calendar for the whole finish phase. We order early, but only after the written scope and allowances are signed so you’re not locked into a non-refundable purchase that no longer fits the design. Call (866) 925-0334 and we’ll map your material lead times against a realistic start date.
A general contractor on a San Antonio Heights hillside lot plans for drainage, retaining walls, and foundation engineering before framing starts. Flat-lot builders often skip weep holes, site grading, and caisson work, and then the wall leans after one rainy season. We sequence structural and fire-safety work with the county inspection schedule so nothing gets built that has to be redone.
We put the entire scope of work and allowances in writing before ordering a single cabinet or slab. No change orders get discovered halfway through because the product selection, permit drawings, and geotechnical assumptions were locked at contract stage. Call (866) 925-0334 for a free estimate, and you’ll see the exact line items before we ask for a signature.
Written by Noel Castañeda, Owner at Millwright Builders, serving San Antonio Heights and the surrounding foothill communities.