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
If you own a home in San Antonio Heights, you already know construction here runs on different rules than down the hill in Upland. We’re talking San Bernardino County permits, hillside grading, fire-clearance review, and sloped lots that punish a contractor who doesn’t plan for them. Iron Beam Contractors handles the full scope: kitchen and bath remodels, room additions, roof replacements, hardscape, and detached ADUs, all under one contract and one point of contact. Nolan Driscoll leads our crews, and every San Antonio Heights project gets built around the conditions that actually exist on your lot. Call (833) 756-5936 and we’ll walk the property before we ever quote a number.
Why Iron Beam Contractors Is San Antonio Heights’s Preferred General Contractor Company
We earn repeat work in San Antonio Heights because we scope hill projects like hill projects, not flat-lot jobs with a markup. Homeowners here have watched city-based contractors get buried by county fire-review requirements and slope-stability letters they never saw coming. We build that into the plan from the first site visit, so the schedule and the budget hold. That reputation matters on Mountain View Avenue, Euclid Avenue, and the winding streets off 24th Street, where word travels fast when a contractor actually finishes on time.
Our San Antonio Heights customers tend to be specific about what they want: a shop building that matches the house, an ADU for extended family, a kitchen that doesn’t fight the original mid-century bones. We write fixed-scope proposals with allowances in writing, and we don’t trade out materials mid-job. The county review process here is slow enough without adding contractor chaos on top of it. When we say a number, it’s because we’ve already accounted for haul distance, erosion control, and the fire marshal’s vegetation requirements.
Styles & brands we work with
General Contractor Services in San Antonio Heights
General Contractor Services in San Antonio Heights means managing the whole build through San Bernardino County’s plan check and inspection system: structural work, finish work, site work, and the paperwork that keeps it moving. On a hillside lot, that often starts with grading and drainage before the first wall goes up. A home addition in San Antonio Heights typically lands between $45,000 and $130,000 depending on foundation type, retaining wall needs, and how much fire-hardening the county requires. We scope all of it before we quote.
Hillside Additions and Whole-Home Renovations
Many San Antonio Heights homes are custom ranches built for a different era, with older additions that don’t always meet current hillside standards. We plan around caissons or retaining walls where the slope demands it, and we sequence demolition so erosion control is in place before the rainy season. That’s the difference between a company that knows foothill construction and one that learns it on your dime.
Foundation and Structural Upgrades
Sloped lots mean drainage problems find their way into crawl spaces and slabs fast. When we open up a floor for a remodel, we look at what the water has been doing. If the project needs shear-wall upgrades or new footings to meet current code, we do it while the walls are open, not after the finishes are in.
What happens when you call
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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
As a Construction Company working across San Antonio Heights, we take on projects most garage-door remodelers and handyman crews won’t touch: detached shops, retaining walls, site grading, and accessory structures that require county-level coordination. A garage conversion in San Antonio Heights generally runs $30,000 to $80,000, while a full ADU construction lands between $90,000 and $220,000 depending on civil engineering requirements. The cost is never just about square footage up here.
ADU and Detached Shop Construction
On a sloped lot off Mountain View Avenue, our crew built a detached ADU and shop. The county required a slope-stability letter and 100 feet of defensible space before we could pour footings, so we sequenced the rough-in and inspections around those conditions. We used KraftMaid cabinets in the ADU kitchenette and set a draw schedule that held allowances in writing, delivering the project without a single change order dispute. That’s what building in San Antonio Heights actually looks like.
Outdoor Living and Hardscape Builds
Flatwork on a grade is not the same as flatwork on a flat lot. We use Belgard pavers for patios and driveways where drainage and slope stability demand a permeable surface that doesn’t send runoff toward the house. Site prep, base compaction, and erosion control are part of our scope, not an extra.
Trusted Brands We Service in San Antonio Heights
We source from manufacturers that build for durability and fire resistance, because San Antonio Heights demands both. Belgard pavers and retaining wall systems handle slope and drainage work without failing under heat and Santa Ana winds. ActiveYards and Bufftech fencing give us options for perimeter and defensible-space layouts that meet county requirements while still looking right on a foothill property. We keep fast turnaround on ordering for San Antonio Heights customers because we know a delayed material delivery can stall a county inspection cycle. One contractor, every phase, and every material specified for longevity.
See the difference
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After
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After
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AfterCommon General Contractor Problems We See in San Antonio Heights Homes
- Quoting flat-lot prices on hillside sites: A contractor comes up from Rancho Cucamonga, sees the square footage, and gives a number with no grading, no retaining wall, no fire-clearance line item. Then the county review hits and the budget blows apart. We walk the lot and quote with the conditions included.
- Assuming city permit timelines apply: San Antonio Heights is unincorporated, so San Bernardino County and the county fire marshal review the plans. If you’re used to Upland turnarounds, the wait here is longer and the conditions list is different. We factor that into the schedule before you sign.
- Underestimating material hauls and equipment access: Narrow foothill roads and steep driveways limit what a delivery truck can reach. We plan for smaller loads, staging constraints, and equipment that fits the access you actually have, not the access a flatland job assumes.
- Vague scopes and verbal change orders: On a county-permitted job, ambiguity gets expensive because every revision can trigger re-review. We write allowances, brand names, and scope boundaries into the contract so change orders stay rare and documented.
Pricing for General Contractor in San Antonio Heights, CA
San Antonio Heights pricing is not Upland pricing. The lot conditions up here add civil engineering, fire-hardening, and grading line items that don’t exist down in the valley. Here are the major-project ranges we quote from, based on actual county-reviewed builds in the 91784 ZIP code:
| Project Type | Typical San Antonio Heights Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
What moves the number most here is whether your lot triggers slope-stability review, how much defensible-space clearing the fire marshal asks for, and how far material has to travel up the hill. We price against the actual conditions after a site walk, not from a spreadsheet. Call (833) 756-5936 and we’ll give you a fixed-scope estimate in writing, not a round number that changes when the county review comes back.
We Also Serve Cities Near San Antonio Heights
Iron Beam Contractors is based in Orange, CA, and we take projects across the inland foothills. While this page focuses on San Antonio Heights, our crews also work in Upland, Claremont, Rancho Cucamonga, and Montclair. If you’re comparing contractors across the county line, see our General Contractor service page, or if you’re in the foothills proper, our General Contractor in San Antonio Heights guide covers county permitting and hillside scope in more detail.
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. San Antonio Heights is unincorporated, so every permit for a detached shop, ADU, or addition goes through San Bernardino County building review, not a city building department. The county fire marshal also reviews the project, and on many hillside lots that triggers slope-stability and vegetation-management conditions before you can pour footings. Call (833) 756-5936 and we’ll tell you what your specific lot is likely to require.
A sloped lot can add $10,000 to $40,000 or more to an addition in San Antonio Heights depending on how much cut-and-fill, retaining wall, and drainage work the county requires. That’s not a markup, it’s the actual cost of stabilizing the ground before you build on it. We bring a grading assessment into the quote so you see that number before you commit.
Most of San Antonio Heights sits in a designated wildfire hazard zone, so the county requires ember-resistant vents, ignition-resistant materials, and defensible-space clearance around structures. The exact requirements depend on your parcel and the scope of work, but they commonly add both cost and review time. We specify materials to the county’s fire standards from the first plan set.
We stage deliveries in smaller loads and schedule them around your actual road and driveway access, not an optimistic assumption from the sales guy. On some San Antonio Heights properties, that means a shorter concrete pump reach, a different paver delivery method, or hand-loading where a truck can’t swing. The plan accounts for it, so the schedule doesn’t stall mid-project.
Because county review is slow and revisions trigger re-review, which costs money and weeks. A written scope with brand names, allowances, and boundaries means the only change orders you see are ones you asked for. Call (833) 756-5936 for a fixed-scope estimate, and the number we give you is the number we build to unless you change the job.
Written by Nolan Driscoll, Owner at Iron Beam Contractors, serving San Antonio Heights and the inland foothills.