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
Remodeling Company in Fullerton, CA
Home renovation in Fullerton means working on houses built decades before modern codes existed, in a city where the planning counter and historic review shape every project. Most of what we do here is remodel, addition, and ADU work on pre-1960 bungalows, Craftsman cottages, and postwar ranch tracts. If you’re planning a kitchen, bathroom, addition, or ADU in Fullerton, call Square One Builders at (877) 688-9930 for a free estimate.
Why Fullerton Homes Are Different
Fullerton is a built-out North Orange County city. There are no new subdivisions going in. Nearly every job we take on here is a remodel, a second-story addition, a garage conversion, or an ADU on a lot that already has a house on it. That changes the work in ways an out-of-town contractor won’t always anticipate.
Housing is dominated by pre-1960 single-family bungalows, Spanish Colonial and Craftsman cottages, and postwar ranch tracts, plus mid-century apartments near Cal State Fullerton and the downtown core. That means knob-and-tube or early Romex wiring, old galvanized and cast-iron plumbing, pier-and-beam or shallow slab foundations, and lath-and-plaster walls. Any remodel that opens a wall in Fullerton tends to find something that needs correcting before finish work can begin. On older downtown and College Park blocks, original clay sewer laterals and undersized 100-amp or even 60-amp panels are routine discoveries. An addition or ADU almost always triggers a panel upgrade and often a sewer lateral replacement.
The city’s Historic Preservation review applies to large swaths of the older fabric. Window style, roof pitch, and setbacks on visible front elevations can be dictated by the review. We coordinate that process so the design you want is the design the city will approve.
Climate matters too. Fullerton sits inland enough that Santa Ana wind events and the Wildland-Urban Interface along the Coyote Hills and north Fullerton hillsides make fire-resistant detailing a real construction consideration. Class A roofing, ember-resistant vents, and defensible-space planning show up in our Fullerton scopes more than in coastal Orange County. The hot, dry summers also push attic insulation, cool roof selection, and HVAC load planning to the front of the conversation.
Styles & brands we work with
Our Main Fullerton Services
Most Fullerton homeowners reach out to us for one of two things: a full-scope general contractor to run a major remodel from demolition through finish, or a home remodeling project focused on kitchens, bathrooms, and living spaces. Here’s how each works in Fullerton.
General Contractor in Fullerton
Fullerton remodels rarely stay inside the original footprint. You open a wall and find cast-iron drain lines, or you add a second story and the panel is undersized, or the historic review requires a specific roof pitch. That’s where a single accountable general contractor pays off. We manage structural work, plumbing, electrical, roofing, windows, siding, and finishes under one contract, and we coordinate the city’s plan check and inspection process. General Contractor in Fullerton
Home Remodeling in Fullerton
Home remodeling in Fullerton usually means taking a 1920s bungalow or a 1950s ranch and making it work for how people live now. Kitchens get opened up, bathrooms get reconfigured, and old lath-and-plaster walls come down to make room for insulation, new wiring, and modern plumbing. We spec materials from a portfolio of 50+ brands, including American Standard and Toto for plumbing fixtures, and Schluter for waterproofing systems, so the result fits the house and the budget. Home Remodeling in Fullerton
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Home Renovation in Fullerton
Home renovation in Fullerton usually means opening up a pre-1960 house and discovering what’s behind the plaster. Knob-and-tube wiring, galvanized supply lines, cast-iron drains, and undersized panels are common finds, and every one of them changes the scope and the budget. That’s exactly the kind of project we run as a single accountable team: structural correction, electrical and plumbing upgrades, and finish work all under one contract, with permits and inspections handled from the start. If you’re planning a renovation in Fullerton, call Home Renovation at (877) 688-9930 for a free estimate.
Home Renovation Contractors
Fullerton homeowners often ask us to take over a renovation that started as a kitchen or bathroom project and grew. Here’s what that looks like.
Signs you need it
You’re coordinating three separate trades by yourself, the scope keeps expanding, or the city has flagged work that was done without permits.
What it costs in Fullerton
A kitchen remodel in Fullerton runs $14,000 – $45,000, a bathroom $9,000 – $28,000, and a home addition $45,000 – $130,000 depending on the age of the house and what’s behind the walls.
How we do it
We start with demolition and discovery, correct any structural, electrical, or plumbing issues the city will flag, then run finishes from cabinetry to trim with one crew accountable for the whole job.
Home Renovators
When a Fullerton house needs work across multiple systems, a single renovation team prevents the finger-pointing that happens when trades are loosely coordinated.
Signs you need it
You’re planning work that touches plumbing, electrical, and structural at the same time, or you want one company responsible for the entire permit process.
What it costs in Fullerton
Small kitchen remodels run $9,000 – $20,000, countertops $2,000 – $6,500, and backsplash installation $800 – $2,500 in Fullerton, before any hidden-wall corrections are priced in.
How we do it
We bring the trades under one schedule, handle plan review and inspections with the city, and install finishes from brands like Toto and American Standard so the work holds up.
Home Renovation Companies
Fullerton’s older housing stock means renovation companies here do less cosmetic work and more system replacement than they would in a newer tract.
Signs you need it
Your electrical panel is 100 amps or less, your plumbing is galvanized or cast iron, or your home has lath-and-plaster walls that complicate every opening.
What it costs in Fullerton
Cabinet installation runs $4,000 – $13,000, kitchen island installation $3,000 – $10,000, and bathroom vanity installation $800 – $3,000 in Fullerton.
How we do it
We open the walls, document what’s there, bring systems to current code, and rebuild with materials spec’d for fire resistance, insulation, and the city’s design review.
What Home Renovation Costs in Fullerton
| Item | Typical range in Fullerton |
|---|---|
| Kitchen remodel | $14,000 – $45,000 |
| Bathroom remodel | $9,000 – $28,000 |
| Home addition | $45,000 – $130,000 |
Do I need a permit for a home renovation in Fullerton?
Almost always, yes. Fullerton’s planning and building counter requires permits for structural, electrical, plumbing, and most finish work, and historic review can add conditions on older blocks. We handle plan check and inspections for you.
How long does a full home renovation take in Fullerton?
Plan for four to eight months on a whole-home renovation, depending on what’s discovered behind the walls and how long the city’s review takes. Panel upgrades, sewer lateral work, and historic review add time. Call (877) 688-9930 for a realistic schedule.
Brands We Service in Fullerton
Square One Builders installs and services materials from 50+ brands, including American Standard, Toto, Schluter, and Sterling. We spec the right material for your project and coordinate delivery and installation through one contract. See our brands for the full portfolio.
See the difference
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AfterPricing for Remodeling Company in Fullerton, CA
| Service | Typical range in Fullerton |
|---|---|
| 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 |
| Walk-in shower installation | $4,500 – $12,000 |
| Tub-to-shower conversion | $3,500 – $10,000 |
| Paver patio installation | $3,500 – $11,000 |
| Roof replacement | $8,000 – $20,000 |
| Window replacement | $4,500 – $15,000 |
| Home addition | $45,000 – $130,000 |
| ADU construction | $90,000 – $220,000 |
What pushes a Fullerton price up is what’s behind the walls: knob-and-tube wiring, galvanized plumbing, cast-iron drains, and undersized panels all add cost the moment they’re exposed. We give written line-item estimates before work starts, so you know exactly what you’re approving.
Neighborhoods We Serve in Fullerton
Square One Builders has served Fullerton since 2014, working across the city’s older residential fabric and its newer hillside edges. We’re familiar with the historic review process downtown and in College Park, and the fire-resistant detailing required near the Coyote Hills interface. Typical response time for an estimate in Fullerton is one to two business days.
- Downtown Fullerton and the historic core
- College Park
- Chapman and Commonwealth corridors
- North Fullerton hillside areas
- Neighborhoods around Cal State Fullerton
Service Area – Cities Near Fullerton
Square One Builders works throughout North Orange County, and we regularly take on projects in the cities surrounding Fullerton. Homeowners in Anaheim, CA, La Habra, CA, Placentia, CA, and Brea, CA call us for the same full-scope renovation work, with permits and material sourcing handled the same way. Call (877) 688-9930 to confirm service in your area.
Serving Fullerton, CA — Our Local Coverage Area
We’re based in the Fullerton 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 Remodeling Company in Fullerton
We typically schedule estimate visits in Fullerton within one to two business days. Start dates depend on city plan check times and current schedule, but we’ll give you a realistic timeline at the estimate, not a vague promise. Call (877) 688-9930 to get on the schedule.
Yes. We prepare plans that address the city’s historic review requirements on older downtown and College Park properties, including window style, roof pitch, and setback conditions. We submit, respond to plan check comments, and stay with the project through final inspection.
Yes. We spec Class A roofing, ember-resistant vents, and fire-resistant exterior details for homes near the Coyote Hills and north Fullerton’s Wildland-Urban Interface. Every scope includes the defensible-space and materials work that the city and fire authority require.
What happens when you call
- 1A real person answersNo phone trees — talk to a local construction pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you — the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Fullerton Customers Say
"Framing crew was meticulous and the walls are straight everywhere. Drywall goes on a lot better when the framing is right."
— Renee Novak"He was upfront about a soil issue that added cost early rather than absorbing it and surprising us at the end."
— Sanjay Patel"Every inspection passed first time. The building department clearly knows him and that made the whole process easier."
— Christine Yang