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
If you’re planning a kitchen remodel, a roof replacement, or a hillside addition in Los Serranos, you need one contractor who can handle the full scope without the subcontractor shuffle. Our General Contractor team works throughout the 91709 ZIP, from the older ranch parcels near Los Serranos Country Club to the newer hillside tract homes cut into the Chino Hills foothills. Call (855) 473-5620 for a free estimate, and we’ll walk the site with you before we quote a number you can actually build to.
Why San Bernardino Contractors Is Los Serranos’s Preferred General Contractor Company
We know what unincorporated San Bernardino County means for your project. Los Serranos jobs trigger county building and safety review, not city permitting. That changes everything about how a plan is drawn, stamped, and inspected. A flatland crew from Chino or Ontario can absolutely frame a kitchen wall. But when the inspector wants a wildland-urban interface materials sign-off because your rear lot backs to open chaparral, they’re suddenly lost. We aren’t.
Ruben Castillo runs our projects with a simple rule: the quote matches the scope. No vague allowances. No verbal change orders. Every hillside retaining wall, every roof tear-off, every window package gets written line-item pricing before we start. That’s why homeowners across Los Serranos keep our number after the first job. Response time to this area is consistent because our crews are staged nearby, not dispatched from two counties over.
You pick the brand. We handle the build. It’s how we’ve always worked here.
Styles & brands we work with
General Contractor Services in Los Serranos
General Contractor Services in Los Serranos means one point of accountability for every trade, every permit, and every material on your lot. A whole-home remodel here typically runs $45,000 to $130,000 depending on the hill work involved. A kitchen remodel lands between $14,000 and $45,000. A bathroom remodel runs $9,000 to $28,000. Simple jobs, complicated jobs, hillside jobs. We bid them all the same way: specific line items, written change orders, and a permit set that passes county review the first time.
Whole-Home and Room Additions
Older Los Serranos ranchers were built when the land was graded differently. A room addition on one of those parcels means tying new foundation work into existing slope soil, and we’re not surprised when the geotech report calls for a retaining wall. Our crew handles the full sequence: grading, wall, framing, roof tie-in, county inspection.
Kitchen and Bath Remodels
A kitchen remodel on the flat part of Los Serranos is straightforward. Up on a canyon-edge lot, the same job can require ventilation upgrades and seismic strapping that cheap quotes skip. We plan for what the hillside demands. You get Cambria or Silestone counters, Grohe fixtures, and a schedule that doesn’t stall out waiting for a sub who bid the job wrong.
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 Los Serranos
As a Construction Company working Los Serranos, we carry the site-work, drainage, and structural scope that most remodelers avoid. A hillside home addition runs $45,000 to $130,000. A garage conversion runs $30,000 to $80,000. An ADU runs $90,000 to $220,000. Those numbers include the engineering, the retaining wall, the drainage review, and the county inspections. Not just framing and drywall.
Retaining Walls and Slope Stabilization
On the Los Serranos side of the Chino Hills, winter storms send runoff downslope faster than flat-lot contractors understand. We’ve pulled permits for load-bearing walls and regrades more than once near the Los Serranos Country Club area, where mid-century ranchers were built before modern drainage codes. The wall is the first conversation on many hillside jobs. Everything else follows.
Roofing, Siding, and Exterior Hardening
Hot, dry summers and Santa Ana wind events mean your exterior materials need to do two jobs at once: hold up to wind loads and resist ignition. We install GAF and CertainTeed roofing systems rated for the wind exposure on the 71 corridor side of the community. James Hardie fiber-cement siding goes on the wind-exposed faces. It’s not a premium push. It’s what the county WUI review expects to see.
Trusted Brands We Service in Los Serranos
We’re authorized to work with over 50 named product lines, and we keep the common local parts moving fast for Los Serranos customers. Roofing systems from GAF and CertainTeed. Grohe and Sterling plumbing fixtures for baths and kitchens. Cambria, Silestone, and Caesarstone countertops. The point isn’t the brand count. It’s that we can put a CertainTeed wind-rated roof on your house and a Grohe shower system in your bath without juggling three different suppliers. One contractor, every phase. From the roof down to the pavers.
Common General Contractor Problems We See in Los Serranos Homes
- Slope drainage that was ignored for decades. Mid-century ranch homes near the Los Serranos Country Club area were often graded before modern drainage codes existed. Water pools at the foundation line, and by the time someone notices, the wall is already moving. We address drainage before we touch the pretty stuff.
- Wildfire-exposed siding on windward faces. The chaparral on the Chino Hills side of Los Serranos doesn’t care about your paint color. Homes facing the open slope need ignition-resistant materials. Homeowners who skipped that upgrade during a remodel often regret it when the first Santa Ana event of the year pushes embers onto the property.
- Retaining walls built without engineering. Some crews pour a wall and walk away. Then winter rain arrives, the hillside moves, and the wall leans. County building and safety won’t sign off on that. Neither will we. Walls on graded Los Serranos terrain need stamped engineering, full stop.
- Remodels that trigger structural reviews nobody planned for. An older Los Serranos rancher has load paths that worked fine in 1965. Open up a load-bearing wall for a kitchen remodel and the county wants to see the new shear and hold-down plans. We map that out during the quote, not during demo.
See the difference
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AfterPricing for General Contractor in Los Serranos, CA
Here’s what work actually costs in Los Serranos. A kitchen remodel runs $14,000 to $45,000. A bathroom remodel runs $9,000 to $28,000. Roof replacement runs $8,000 to $20,000, and impact window installation runs $8,000 to $25,000. Driveways and flatwork fall between $4,500 and $12,000 for concrete. The biggest variables on this side of the Chino Hills are access, slope, and drainage: a hillside lot that needs a retaining wall and a regrade will always cost more than a flat parcel, and a compliant quote will show you exactly why. Call (855) 473-5620 for a free written estimate. We’ll walk the site and give you numbers you can plan around.
| Project Type | Typical Range in Los Serranos |
|---|---|
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Roof Replacement | $8,000 – $20,000 |
| Impact Window Installation | $8,000 – $25,000 |
| Concrete Driveway Installation | $4,500 – $12,000 |
We Also Serve Cities Near Los Serranos
Our crews work Los Serranos every week, and we regularly run projects in Los Serranos and the surrounding communities. We also serve Chino, Yorba Linda, Montclair, and Pomona. If you’re close by, the same team shows up.
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
Any hillside or canyon-edge project in unincorporated San Bernardino County must clear wildland-urban interface ignition-resistant materials review and Santa Ana wind-load evaluation through county building and safety. That means stamped engineering for retaining walls, documented wind ratings on roofing and siding, and a drainage plan the inspector actually reviews. Flatland jobs in Chino or Ontario never trigger this. Hillside jobs in Los Serranos do. Call (855) 473-5620 and we’ll tell you exactly what your parcel triggers.
A written scope of work, stamped plans, third-party inspection sign-offs, and change orders in writing are the paperwork an insurer accepts without question. If a Santa Ana wind event damages your roof, a GAF or CertainTeed system with documented wind-load compliance puts your claim in a different category than a roof with no paperwork. We close every Los Serranos project with that file.
Because flatland crews price hillside jobs like flatland jobs. They skip the engineering review, omit the drainage plan, and use builder-grade materials that don’t meet WUI ignition-resistant standards. The quote looks competitive. The county inspection catches it later, and the draw schedule balloons. We price slopes honestly up front.
Stamped retaining wall engineering, a drainage plan with inspection sign-off, ignition-resistant exterior materials on wind-exposed faces, and written change orders with fixed allowances. A bargain quote has none of that. That’s the entire difference. Call (855) 473-5620 for a written line-item quote built for Los Serranos terrain.
Yes, and you should. When one contractor owns the kitchen, bath, roof, and drainage scope, the schedule runs clean and the warranties line up. A kitchen remodel on a Los Serranos hillside lot is not the same job as a kitchen remodel on a flat parcel. We sequence the roof, gutter, and drainage work before finish materials go in, so you’re not cutting into a new backsplash to fix a flashing leak later.
Call San Bernardino Contractors for Your Los Serranos Project
If your project sits on a graded foothill lot, faces the open chaparral, or drains toward the valley floor, you need a contractor who reads the terrain first. We do. Ruben Castillo and our crew work Los Serranos every week, and we bid every job with written line items, fixed allowances, and permits that pass county review. Call (855) 473-5620 to schedule your free estimate. We’ll walk the site with you and show you exactly what your hillside needs.
Written by Ruben Castillo, Owner at San Bernardino Contractors, serving Los Serranos and the Chino Hills foothills.