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 Home Remodeling Across Los Serranos
Home remodeling in Los Serranos usually means coordinating two separate building departments: San Bernardino County for unincorporated parcels, and the City of Chino Hills for homes on the surrounding city side. Pull the wrong permit and your remodel stalls before demolition starts. That’s why we tell every Los Serranos homeowner the same thing on the first call: Square One Builders handles the permit path before we touch a wall, so your Home Remodeling project moves on schedule and passes inspection the first time. Call (877) 688-9930 for a free, permitted, line-item estimate.
Why Square One Builders Is Los Serranos’s Preferred Home Remodeling Company
Brent Calloway has built Square One Builders around one principle: a remodel should never make a homeowner manage five subcontractors and two different permit desks. In Los Serranos specifically, that principle matters more than anywhere else we work. One side of Pine Avenue can be unincorporated county land while the house across the street falls under Chino Hills plan check. We’ve pulled both, we know the inspectors on both, and we write scopes of work that reflect the correct jurisdiction before we submit anything.
Our Los Serranos customers consistently tell us the same two things: the permit process felt easier than they expected, and the written allowances for cabinets, countertops, and fixtures meant zero surprises at the draw schedule. You’ll also notice we talk about fire hardening more than most remodelers do. Hot inland summers and dry Santa Ana winds make that a real conversation here, not a sales line. We’ll spec Class A roofing, ember-resistant vents, and defensible-space clearing that your insurer can actually verify.
We’re a licensed general contractor, insured and bonded, and our team manages full-scope residential work from rough framing through finish carpentry. When you call, you get Brent or one of his project leads, not a call center. That’s how we handle a 91709 remodel.
Styles & brands we work with
Full Home Remodel in Los Serranos
A Full Home Remodel in Los Serranos typically runs $14,000 to $45,000 for the kitchen scope alone, with whole-home work that includes bathrooms, flooring, and structural changes falling at the higher end of that range when you add bedrooms and living areas. Older ranch-style homes along the Chino Hills border often need panel upgrades, subfloor repair, or seismic brackets before finish work begins. Newer tract infill homes come with their own set of challenges: tight lot lines, HOA requirements, and county fire codes that demand specific clearances around structures.
Here’s how we approach the two most common remodels in 91709.
Kitchen and bath remodels on a single contract
When a Los Serranos homeowner wants a kitchen island, Cambria or Silestone countertops, Kohler fixtures, and a walk-in shower, they should not hire three different companies. We rough in the plumbing, frame the island, hang the cabinets, set the stone, and tile the backsplash under one contract. The cabinet installation in Los Serranos typically runs $4,000 to $13,000, and countertop installation adds $2,000 to $6,500 depending on stone and edge profiles.
Whole-home renovations on aging county parcels
Large-lot properties near Los Serranos Country Club often need work beyond the interior: a roof replacement at $8,000 to $20,000, impact windows at $8,000 to $25,000 if the home sits on a wind-exposed hillside, and sometimes a paver driveway or patio at $3,500 to $11,000 to manage drainage and curb appeal. We scope all of it, pull the county permits, and run the job from first demo to final walkthrough. One contractor, every system.
Home Remodeling Contractor in Los Serranos
Choosing a Home Remodeling Contractor in Los Serranos means choosing someone who knows that County Fire has its own review for fuel modification zones on larger lots, and that San Bernardino County plan check often wants structural calculations for load-bearing walls that a city might not require. It means writing a scope that names the brands, the allowances, and the inspection points before you sign. We do that on every job, and we price the work honestly from the start: a bathroom remodel in Los Serranos runs $9,000 to $28,000, a tub-to-shower conversion $3,500 to $10,000, and a full home addition $45,000 to $130,000.
Two things set us apart as the contractor for this area.
Written scope with named allowances
You’ll know exactly which cabinet line, which countertop material, which window package, and which roofing system goes into your Los Serranos remodel before we open a wall. We write allowances for stone and fixtures in the contract, and we don’t change them without a written change order you approve first. That’s how a $45,000 kitchen remodel stays at $45,000 instead of drifting to $70,000 through vague “allowance” language a lesser bid might hide behind.
Fire-hardening documentation your insurer can use
When we replace a roof in Los Serranos, we spec Class A material from Owens Corning, CertainTeed, or GAF and note it on the permit and the final invoice. When we retrofit vents, we install ember-resistant models and photograph them before closing the fascia. That documentation travels to your insurer and your home file. After a Santa Ana wind event, an insurance adjuster can see exactly what was mandated, what was installed, and that the county inspector signed off. Premiums and claims go differently when you have that paper trail.
Trusted Brands We Service in Los Serranos
We install and stand behind roofing from Owens Corning and CertainTeed, countertops from Cambria and Silestone, plumbing fixtures from Kohler and Moen, windows from PGT and Therma-Tru, and siding from James Hardie. It’s not a random catalog. We spec the right material for your project and for the Los Serranos climate: certain brands carry wind ratings and Class A fire ratings that matter more on this hillside than they would ten miles south. Since we’re in Westminster and serve Los Serranos directly, we can often pull locally stocked materials without multi-week freight delays. You get the brand warranty, our workmanship, and one accountable team if anything needs attention later.
See the difference
Before
After
Before
After
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AfterCommon Home Remodeling Problems We See in Los Serranos Homes
- Wrong jurisdiction on the permit. A Los Serranos homeowner pulls a City of Chino Hills permit for a home that actually sits in unincorporated San Bernardino County – or the reverse – and plan check stalls for weeks before a single wall comes down. We verify the parcel’s jurisdiction first, before we draft anything.
- Undocumented fire-hardening. A previous remodel put on a new roof and vents but never noted the rating or the model on the permit. When the insurer asks what’s actually installed after a Santa Ana wind event, the homeowner has nothing to show. We write that detail into the permit and final invoice.
- Aging panel and subfloor surprises on ranch-style homes. Homes along the Chino Hills border were built decades ago, and the subfloor rot or undersized panel hiding behind the drywall becomes a five-figure surprise if nobody scoped it. We write the rough-in risks into the proposal before you sign.
- Hillside drainage showing up after the remodel. The winter rainy season exposes grading problems on sloped lots near the Country Club, and a remodel that ignored drainage now has water at the new foundation. We check the grade before we build, and we bring hardscaping into the scope where the lot needs it.
Pricing for Home Remodeling in Los Serranos, CA
Here is what we typically quote for Los Serranos work, based on current 2025 and 2026 project data in the 91709 ZIP. These are line-item ranges, not vague “call us” numbers.
| Project | Typical Los Serranos Range |
|---|---|
| Full Home Remodel (Kitchen Remodel) | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Home Addition | $45,000 – $130,000 |
| Impact Window Installation | $8,000 – $25,000 |
| Roof Replacement | $8,000 – $20,000 |
What changes your number: the jurisdiction (county plan check adds structural review and sometimes fire zone requirements), the age of the home, whether you’re changing the roofline or moving walls, and the brand tier you choose. We offer free estimates with written line-item pricing. Call (877) 688-9930 to schedule yours, and we’ll walk the job with you before we quote it.
We Also Serve Cities Near Los Serranos
Square One Builders handles full-scope remodels in Chino, Yorba Linda, Montclair, and Pomona, plus every unincorporated county pocket around them. If you’re just over the line from Los Serranos, call us, and we’ll confirm which permit desk applies to your address before we quote anything.
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 Home Remodeling in Los Serranos
It depends entirely on which side of the street your house sits on. Los Serranos is unincorporated San Bernardino County land surrounded by the City of Chino Hills, so a home on one side of the line pulls a county permit while the house across the street goes through Chino Hills plan check. We verify the parcel’s actual jurisdiction before we write your scope, because pulling the wrong permit stalls the job for weeks. Call (877) 688-9930 and give us your address, and we’ll tell you exactly which path applies.
For roofing, the practical standard is Class A fire-rated material from Owens Corning, CertainTeed, or GAF, which all carry the rating insurers want to see in hot, windy inland zones. For vents and soffits, ember-resistant models satisfy the current wildfire hardening expectations for hillside parcels in the 91709 ZIP. We also clear defensible space around the structure before and after the remodel, and we document every rating and every inspection sign-off on the permit and the final invoice so your insurer has a paper trail. Not every contractor provides that documentation, and it matters when you file a claim.
We write a fixed scope with named allowances: your cabinet line, your countertop material, your fixture brand, your window package, and your roofing system are all in writing before demolition. The quote includes the known rough-in risks – aging panels, subfloor repair, fire-zone requirements – rather than hiding them as “allowances” that balloon later. If something changes mid-project, you get a written change order and approve it before the work happens. A Los Serranos kitchen remodel should stay at the quoted number, not drift upward because nobody scoped the old wiring. Call (877) 688-9930 and we’ll show you what a real written estimate looks like.
Because unpermitted work becomes a problem when you sell the house, refinance it, or file an insurance claim on it. In Los Serranos, where one side of the street is county and the other is Chino Hills, unpermitted structural changes, panel swaps, and roof replacements create title and disclosure problems that cost more to fix later than the permit cost upfront. A permitted remodel also means the county or city inspector verified the framing, rough-in, and fire-hardening, and that verification is what you point to if an insurer or buyer ever asks. We pull the permit, pass the inspections, and keep the paper trail clean.
A compliant Los Serranos quote should name the jurisdiction and the permit path, specify the roofing fire rating and the vent model, include defensible-space clearing, show written allowances for cabinets, countertops, and fixtures, and state the inspection milestones in the schedule. A cheap quote usually leaves the permit vague or “owner-obtained,” says “standard roofing” without a Class A rating, hides the panel or subfloor risk, and has no named allowance structure. That’s how a $22,000 bathroom quote turns into a $34,000 surprise. Compare our line-item estimate and you’ll see the difference in ten minutes. Call (877) 688-9930 for a free quote.
Written by Brent Calloway, Owner at Square One Builders, serving Los Serranos since 2018.