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 Los Serranos
Los Serranos homeowners need a General Contractor who understands this corner of Chino Hills isn’t like the newer tracts down the hill. We’re talking about ranchette parcels with legacy lot lines, sloped clay hillsides that move with the seasons, and buildings that predate current code by decades. If you’re planning an addition, a garage conversion, or an ADU in the 91709 zip code, the permit path here can get tangled fast. San Mateo Construction has walked that path before. Call us at (855) 901-7266 and we’ll tell you exactly what your project needs before you spend a dollar on drawings.
We work across Los Serranos regularly, from the horse properties off Eucalyptus Avenue to the hillside homes backing up toward Chino Hills State Park. That local familiarity matters when the building department asks about your parcel’s County-era history. We know which questions come up here because we’ve answered them on other Los Serranos jobs. The estimate is free, and we’ll put the scope in writing.
Why San Mateo Construction Is Los Serranos’s Preferred General Contractor Company
Noel Carrington leads San Mateo Construction with a straightforward approach: one contract, one accountable team, every system from roofline to foundation. Los Serranos homeowners have told us repeatedly that the coordination burden of juggling separate trades is what stalled their projects for years. We remove that entirely. We schedule the subs, procure the materials, run the permits, and stand behind the work.
Our Los Serranos customers value specifics over vague reassurances. When we quote a kitchen remodel or a hillside addition, we name the cabinet lines, the countertop brands, the window manufacturer, and the roofing system. You pick from vetted options like Therma-Tru doors, CertainTeed roofing, or Cambria countertops. We help you choose based on your budget tier, not whatever happens to be on a supplier’s shelf. That’s the difference between a contractor who carries three brand relationships and one who carries fifty-plus.
Local reputation here is built on jobs that pass inspection the first time and documentation that holds up later. We carry that standard on every Los Serranos project, whether it’s a $9,000 small bathroom remodel or a $220,000 ADU build.
Styles & brands we work with
Construction Company in Los Serranos
A Construction Company serving Los Serranos has to handle legacy parcels, hillside grading, and modern Chino Hills code requirements in the same breath. When a homeowner on a ranchette lot off Pipeline Avenue wants to convert a detached garage or add a bedroom wing, we start with a records check. Los Serranos was folded into Chino Hills in 1991, and many parcels here still carry County-era lot lines and outbuildings that were never reconciled under current rules. We flag that before you pay for architectural drawings. Addition costs in Los Serranos typically run $45,000 to $130,000 depending on scope. Garage conversions land between $30,000 and $80,000. ADU construction ranges from $90,000 to $220,000.
Records Reconciliation Before Permits
On legacy Los Serranos parcels, the County records don’t always match what’s physically on the ground. An old detached garage might sit closer to the property line than current Chino Hills setbacks allow. The parcel map might not reflect a fence line that’s been there since the 1970s. We pull the County files, compare them against a current survey, and resolve discrepancies before the permit application goes in. Skipping this step stalls the permit midway, and then your draw schedule collapses after rough-in.
Grading, Drainage, and Fire Hardening
Sloped expansive-clay lots near the Chino Hills State Park edge need more than standard footing work. We engineer grading and drainage corrections into the foundation scope so the structure doesn’t move during wet winters or crack in summer heat. Exterior fire-hardening, from hardie-plank siding to ember-resistant vents, isn’t optional out here. It’s code-driven and it’s what insurers look for. We quote it as standard, not as an add-on.
Remodeling Contractor in Los Serranos
A Remodeling Contractor working in Los Serranos has to respect the age range of the housing stock. You’ve got mid-century ranch homes with original framing, newer tract subdivisions, and custom hillside builds, often on the same street. A kitchen remodel here might start at $14,000 and run to $45,000 on a larger ranch home. Small kitchens are $9,000 to $20,000. Bathroom remodels range $9,000 to $28,000, with small baths at $5,000 to $12,000. Walk-in showers run $4,500 to $12,000, and tub-to-shower conversions are $3,500 to $10,000. We quote those numbers against specific material allowances: tile choices, vanity lines, fixture brands like Kohler or Grohe, and Schluter waterproofing under every wet-area installation.
Bringing Older Framing Up to Current Load Standards
When we open walls in a 1960s Los Serranos ranch, we often find undersized headers or questionable connections that the original builder got away with because the County didn’t enforce what Chino Hills enforces now. A remodel here isn’t just cosmetic. It’s structural. We bring the framing up to current wind-load and seismic standards as part of the scope, not as a change order surprise. You get a written scope of work up front, and we stick to it.
Interior Work That Doesn’t Fight the Climate
Summer heat in the 91709 zip code is a scheduling reality. We sequence exterior work like roofing and stucco repair during the cooler morning hours and shift interior finishes to the afternoon. That’s not a convenience. It’s how you keep adhesives, coatings, and caulks performing correctly in hundred-degree conditions. Los Serranos homeowners appreciate that we know this already instead of learning it on their job.
Trusted Brands We Service in Los Serranos
When you commit to a remodel or build with us, you’re choosing from a brand portfolio that most contractors in this area can’t access. We stock and install Therma-Tru doors for entry and exterior applications, ECO Window Systems for energy-rated window packages suited to inland heat, and Mr-Glass products for shower enclosures and glass work. Each of these names means something specific: Therma-Tru for door rot-resistance and security, ECO for low-E glass performance during Santa Ana heat waves, Mr-Glass for precision-fitted shower glass. Los Serranos homeowners appreciate knowing the exact manufacturer before the order goes in. We keep vendor relationships warm, which means faster turnaround when your Los Serranos project needs a custom door size or a specific glass configuration.
See the difference
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AfterCommon General Contractor Problems We See in Los Serranos Homes
- Legacy parcel records stalling permits. County-era lot lines from before the 1991 incorporation don’t match current Chino Hills maps. We run records reconciliation on every Los Serranos addition and ADU before the permit application, so your draw schedule doesn’t collapse after rough-in.
- Expansive clay hillside movement. Sloped lots near Chino Hills State Park shift with seasonal moisture changes. Foundation design here needs soil reports and drainage corrections, or you’ll see cracking in the first two years.
- Fire-hardening quoted as optional. A cheap bid omits ember-resistant vents, hardie-plank siding, and specific roof assemblies, then the homeowner’s insurer refuses to document the upgrade. We quote fire-hardening as standard on exterior work in Los Serranos.
- Santa Ana wind damage to exposed structures. Detached garages and outbuildings on ranchette parcels take direct wind hits. We specify exterior systems, from roofing to siding, to the wind-load ratings Chino Hills enforces now, not what the County accepted forty years ago.
Pricing for General Contractor in Los Serranos, CA
Here’s what you should expect to pay for the major scopes we handle in Los Serranos. These are written-in rangers grounded in current local market conditions, not national averages.
| Project Type | Typical Los Serranos Price Range |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
What moves the number within each range is site-specific: your parcel’s grading and drainage requirements, whether records reconciliation triggers setback variances, the structural load path on your existing framing, and the material tiers you select. A compliant quote includes permits, inspections, fire-hardening, and documentation. A cheap quote omits those and hands you the bill later. Call (855) 901-7266 for a free estimate with everything in writing.
We Also Serve Cities Near Los Serranos
Los Serranos sits close to several communities we know well: Chino, Yorba Linda, Montclair, and Pomona. Each has its own building patterns and permit quirks, but the fundamentals of a well-run project don’t change. If you’re just over the line in Chino or Pomona, the same single-source accountability applies.
Serving Los Serranos, CA — Our Local Coverage Area
We’re based in the Los Serranos 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 Los Serranos
Yes. Any addition or ADU in the 91709 zip code, especially on hillside parcels near Chino Hills State Park, must meet current Chino Hills wildfire and wind-load requirements. The building department confirms compliance through plan review and inspection sign-offs, and your insurer will ask for documentation of those sign-offs. Call (855) 901-7266 to get a scope that includes this from the start.
Because many Los Serranos parcels still carry County-era lot lines and outbuilding placements from before the 1991 incorporation into Chino Hills. The County records often don’t match the physical reality, so the permit stalls unless we reconcile them first. We run this records check as the first step on any addition, ADU, or garage conversion.
Documented fire-hardening gives your insurer the evidence they need to approve coverage or adjust premiums after a major remodel. Without documentation, the upgrades you paid for may not count. We hand you a project file with permit records, inspection sign-offs, and the specific fire-rated products used, so the documentation holds up when your insurer reviews it.
A compliant quote includes records reconciliation, grading and drainage engineering, wind-load and wildfire-rated assemblies, permits, inspections, and written material allowances. A cheap quote omits those line items and then asks for change orders after rough-in. Get everything in writing before you sign.
Yes. Hillside parcels in Los Serranos sit on expansive clay, and the structures move with seasonal moisture unless the grading and drainage are engineered correctly. We include soil reports, drainage design, and retaining details in the foundation scope. Skipping this creates cracking and water intrusion within the first two seasons.
Ready to talk about your project? Call San Mateo Construction at (855) 901-7266 for a free estimate. Noel Carrington and our team will walk your property in Los Serranos, identify what your parcel needs, and put a compliant scope in writing before you commit to anything.
Written by Noel Carrington, Owner at San Mateo Construction, serving Los Serranos and surrounding communities.