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 Fountain Valley
Square One Builders is a full-scope General Contractor serving Fountain Valley homeowners who want one accountable team for the entire remodel, from structural work and roofing to cabinetry, countertops, and plumbing fixtures. We work throughout Fountain Valley’s 92708 and 92728 zip codes, and we know exactly what these 1960s and 1970s tract homes demand when walls start opening up. If you’re planning a kitchen remodel, bathroom update, room addition, or ADU in Fountain Valley, call (877) 688-9930 for a free estimate and a straight answer on what your project will actually take.

Why Square One Builders Is Fountain Valley’s Preferred General Contractor Company
We’ve earned our reputation in Fountain Valley by doing what most remodelers won’t: managing every system under one contract. When a homeowner off Ellis Avenue or near Mile Square Park calls us about a kitchen remodel, we’re already thinking about the roof pitch, the age of the plumbing, and whether the original single-pane windows will need to be addressed for the room to perform. That’s the difference between a contractor who shows up for one trade and a general contractor who sees the whole house.
Our Fountain Valley customers consistently tell us the same thing: they were tired of coordinating three or four separate specialists and watching the schedule slip between them. With Square One, the buck stops in one place. Brent Calloway leads our team with a simple operating rule: scope it fully, price it honestly, and build it to stay that way. That approach has made us the team Fountain Valley homeowners recommend to neighbors on streets like Talbert Avenue, Slater Avenue, and Brookhurst Street.
Because we’re based just up the road in Westminster, our crews can be in Fountain Valley quickly for site visits, measurements, and permit walks. We know the Fountain Valley building department’s inspection rhythms. We know which subdivisions have HOA architectural review committees that move slowly. And we plan the schedule accordingly so you’re not waiting on an approval that we should have flagged in week one.
Styles & brands we work with







Licensed General Contractor in Fountain Valley
A Licensed General Contractor in Fountain Valley is the contractor of record who pulls permits, schedules inspections, and carries the accountability for every trade on your project. When you remodel a Fountain Valley tract home, you’re almost always touching something that requires a permit, whether that’s moving a load-bearing wall, upgrading an electrical circuit, or replacing a roofline. A licensed GC handles that entire paper trail and the inspection sequence, and that alone saves Fountain Valley homeowners weeks of back-and-forth with the city. On a typical Fountain Valley kitchen remodel, where the range runs $14,000 to $45,000, the permit and inspection work is a meaningful part of why you hire a general contractor instead of a handyman with a truck.
Permit Pulling and Code Retrofit
Fountain Valley’s building department expects older homes to be brought up to current code when walls open. That means a kitchen cabinet swap can legally trigger an electrical upgrade if the original aluminum branch wiring is still feeding the circuits. We pull the permit, write the change order in clear language, and get the inspector’s sign-off before finish work resumes.
Full-Scope Project Management
From demolition through final punch list, one team runs the schedule, the subs, the material deliveries, and the inspections. You’re not calling a plumber at noon and a drywaller at three. You’re calling us once, and we’re already on it.
Residential General Contractor in Fountain Valley
A Residential General Contractor in Fountain Valley handles the full range of work on owner-occupied homes: kitchens, bathrooms, additions, window replacement, roofing, and exterior systems. That’s what we do at Square One. When a Fountain Valley homeowner wants to replace builder-grade finishes with something that will actually last, we’re the contractor who can sequence the whole thing so the cabinet install isn’t waiting on a window that wasn’t ordered, and the roofing tear-off isn’t happening while the countertops sit in the driveway. A bathroom remodel in Fountain Valley typically runs $9,000 to $28,000, and a window replacement project lands between $4,500 and $15,000 depending on the number of openings and whether you’re upgrading from single-pane aluminum to insulated vinyl or impact-rated glass.
Kitchens, Bathrooms, and Whole-Home Updates
We manage kitchen remodels from a $9,000 small-kitchen refresh up to a $45,000 full-gut rebuild with custom cabinetry and stone counters. Bathrooms follow the same pattern: a $5,000 small bath update at one end, a $28,000 full primary bath rebuild at the other. The brand and material decisions happen after we understand your home’s structure, not before.
Additions, ADUs, and Exterior Systems
A room addition in Fountain Valley runs $45,000 to $130,000, and an ADU runs $90,000 to $220,000. We also coordinate exterior work like roof replacement ($8,000 to $20,000) and window replacement under the same contract, so the interior and exterior scopes don’t fight each other.

Trusted Brands We Service in Fountain Valley
We spec materials from a portfolio of 50+ brands, and we stock common local replacement parts for Fountain Valley projects so turnarounds stay short. That includes roofing from CertainTeed, Owens Corning, and IKO, plus cabinetry from KraftMaid and Wellborn and countertops from Cambria and Silestone. Brent Calloway’s rule on brands is simple: we spec the right material for your project, not whatever’s sitting in a warehouse. Whether that’s CertainTeed shingles on a Fountain Valley ranch roof or an Owens Corning system on a low-pitch tract home, the material choice is intentional and matched to the local climate.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in Fountain Valley Homes
- Aluminum branch wiring behind original drywall. Many Fountain Valley homes built in the 1960s and 1970s still carry aluminum wiring on branch circuits. Open a wall for a kitchen island and you may be required to upgrade the circuit before the inspector will sign off.
- Single-pane aluminum windows that complicate every remodel. Those original windows are a thermal and noise liability, and they often fail code when an adjacent room is remodeled. Window replacement in Fountain Valley runs $4,500 to $15,000 depending on the number of windows and the glazing spec.
- Marine layer moisture intrusion on exterior work. Fountain Valley’s coastal influence means morning marine layer and winter rain windows. Roofing, stucco, and exterior paint work has to be scheduled around moisture, or you trap dampness behind the new finishes. We plan exterior scopes around the weather, not against it.
- HOA and architectural review friction on visible changes. Many Fountain Valley subdivisions have HOA review processes for exterior color, window style, and roof material. We document the scope in writing up front so a stop-work or a voided warranty doesn’t blindside you mid-project.
Pricing for General Contractor in Fountain Valley, CA
Here’s what Fountain Valley homeowners can expect to pay for the most common first-upgrade projects. These are real ranges from recent Fountain Valley work, not national averages.
| Project | Typical Fountain Valley Range |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Small Kitchen Remodel | $9,000 – $20,000 |
| Cabinet Installation | $4,000 – $13,000 |
| Countertop Installation | $2,000 – $6,500 |
| Bathroom Remodel | $9,000 – $28,000 |
| Window Replacement | $4,500 – $15,000 |
| Roof Replacement | $8,000 – $20,000 |
What moves the number is the condition behind the walls. A kitchen that only needs cabinets and counters is a different job than one where the original aluminum wiring has to come out. We price both honestly, with a written change order if hidden conditions appear. Call (877) 688-9930 for a free estimate on your Fountain Valley project, and we’ll give you a line-item range before you commit to anything.
We Also Serve Cities Near Fountain Valley
Square One Builders serves Fountain Valley and the surrounding communities including Midway City, Huntington Beach, Costa Mesa, and Westminster. If you’re just outside Fountain Valley and planning a remodel, call us anyway. Our crews are already moving through these neighborhoods every week.
Serving Fountain Valley, CA — Our Local Coverage Area
We’re based in the Fountain Valley 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 Fountain Valley
Yes. Even a 1980s Fountain Valley home will require permits for electrical, plumbing, or structural changes, and the city inspects the work. When we opened a kitchen wall on a ranch-style tract home off Ellis Avenue for a cabinet and island install, the original aluminum branch wiring feeding the range circuit triggered a code upgrade before the inspector would sign off. We pulled the change order in writing, upgraded the rough-in under permit, and moved the KraftMaid cabinets and Cambria island into schedule once the inspection passed. Call (877) 688-9930 and we’ll tell you what your specific scope will require.
Document everything in writing before work starts, and make sure your contractor pulls permits where required. If a warranty claim later arises, the builder will want to see that the original work was altered by a licensed contractor with proper inspection sign-offs. We handle that documentation as part of our standard scope, and we’re happy to walk you through what your specific warranty language does and doesn’t cover. Call (877) 688-9930 to talk it through.
In most Fountain Valley subdivisions, yes. Roof material, window style, and exterior paint color usually require architectural review before work starts. We submit the scope of work and material specs in the format your HOA expects, and we sequence the project so interior work can continue while exterior approvals are pending. If you’re not sure whether your HOA applies, call (877) 688-9930 and we’ll help you figure it out.
Most Fountain Valley ranchers start with a kitchen or bathroom. A small kitchen remodel runs $9,000 to $20,000, a full kitchen remodel runs $14,000 to $45,000, and a bathroom remodel runs $9,000 to $28,000. Window replacement runs $4,500 to $15,000 depending on how many original single-pane aluminum windows you’re replacing. Call (877) 688-9930 for a line-item estimate on your specific floorplan.
Because the housing stock was largely completed by the 1970s, and most of those original homes still carry aluminum branch wiring, galvanized supply lines, and single-pane windows. Cosmetic work exposes those systems, and code requires them to be addressed. That’s why we build an allowance into our Fountain Valley estimates for hidden conditions, and why we write change orders in clear language when something appears. It’s not a surprise to us. It’s just Fountain Valley. Call (877) 688-9930 and we’ll price it honestly from the start.
Written by Brent Calloway, Owner at Square One Builders, serving Fountain Valley from the ground up.