ADU Company in Fontana, CA
Kitchen remodeling in Fontana means working with homes built between the 1950s and 1970s, where original layouts, aging plumbing, and heat-tested materials dictate the scope. Sapphire ADU Builders has served Fontana since 2015, and we built our reputation on knowing exactly how these tract homes behave when you open up a wall or reroute a gas line. Whether you’re planning a full kitchen remodel, a bathroom refresh, or an ADU in the backyard, call (855) 594-0655 for a free estimate.
Why Fontana Homes Are Different
Fontana’s housing stock is dominated by post-WWII and 1960s-70s single-story stucco tract homes, especially through the 92335 corridor. These were built fast, with pier-and-slab foundations, original galvanized supply lines, and kitchens sized around a 30-inch range and a single wall of cabinets. When we open up a Fontana kitchen from that era, we regularly find uneven floor framing, cloth-wrapped wiring that needs replacement, and venting that was never sized for modern cooktops. The home’s age isn’t the problem – it’s the cumulative effect of decades of heat, settling, and previous partial remodels.
The Inland Empire climate adds another layer. Summer highs above 100°F are normal, and Santa Ana wind events push dust through every exterior penetration. That means material choices matter differently here than on the coast. Paint fails faster, cabinet door fronts expand and contract, and any HVAC improvement has to account for real cooling loads, not just occasional use. We spec finishes and ventilation accordingly, and we don’t treat Fontana like a milder climate just because it shares a county with Los Angeles-adjacent markets.
Finally, lot characteristics shape what’s possible. Older 92335 lots frequently have detached rear garages and long side driveways, which sounds like an easy kitchen addition or ADU site – until the city’s preexisting-nonconforming reviews kick in. Fontana’s municipal ADU ordinance and setback reviews are distinct from neighboring San Bernardino or Rancho Cucamonga. We’ve seen out-of-area builders assume standard setbacks and lose months to corrections. We account for that on day one.
Our Main Fontana Services
Fontana homeowners call us most often about two projects: building an ADU in the backyard, and remodeling a bathroom that’s outlived its original 1960s plumbing. Both jobs share a common thread – older homes, larger lots, and a city process that rewards local experience.
ADU Builders in Fontana
Fontana is a City of Fontana jurisdiction with its own ADU permitting path, and the classic project here is a detached garage conversion or a new unit slotted behind the existing house. Older 92335 and 92336 lots often have the space for a rear unit, but pre-1970s setbacks and alley-side garages trigger review conditions that catch flat-rate builders off guard. We match each Fontana lot to the right prefab or site-built solution – from Abodu and Cover to fully custom builds – and we handle the full interior finish so the unit is rent-ready without a second contractor. ADU Builders in Fontana
Bathroom Remodeling in Fontana
A 1950s Fontana bathroom typically has a cast-iron tub set in a wet bed, original galvanized supply lines, and a single 15-amp circuit serving the whole room. Remodeling often uncovers subfloor rot at the tub perimeter and drain assemblies that no longer meet current code. We replace the plumbing back to the main stack, re-frame the wet wall, and build a bathroom that can handle daily use in a hot, dry climate. From the first demolition cut to the final trim, one crew owns the whole job. Bathroom Remodeling in Fontana
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.
Kitchen Remodeling in Fontana
Kitchen remodeling in Fontana is usually about rescuing a 50-to-70-year-old room that was never designed for how families cook today. We see original 36-inch cooktops, single-bowl sinks, and no venting to speak of, all inside homes where summer heat makes a poorly ventilated kitchen genuinely uncomfortable. The fix is a properly scoped remodel that upgrades plumbing, electrical, insulation, and layout in one pass – handled by a team that does ADU-grade interior work full time, including through our Kitchen Remodeling service.
Full Kitchen Gut and Rebuild
Signs you need it
Your cabinets are pulling away from the studs, you have one functional outlet on the backsplash, and the floor framing moves underfoot.
What it costs in Fontana
A full kitchen gut and rebuild in Fontana typically runs $45,000 to $90,000 depending on cabinet grade, appliance package, and how much plumbing and wiring replacement the existing home requires.
How we do it
We demo to the studs, replace supply and drain lines back to the main stack, rewire with dedicated circuits, re-insulate exterior walls, and rebuild with new cabinetry, countertops, flooring, and ventilation.
Cabinet and Countertop Replacement
Signs you need it
Door fronts are delaminating from heat and age, drawer slides bind, and the layout wastes the only wall you have.
What it costs in Fontana
Cabinet and countertop replacement in Fontana generally lands between $18,000 and $35,000 for mid-grade cabinets, quartz or granite counters, and a new sink and faucet setup.
How we do it
We template the counters after the new cabinets are set, so every seam and overhang fits the existing walls, which are rarely square in a 1960s Fontana home.
What Kitchen Remodeling Costs in Fontana
| Item | Typical range in Fontana |
|---|---|
| Full kitchen gut and rebuild | $45,000 – $90,000 |
| Cabinet and countertop replacement | $18,000 – $35,000 |
| Kitchen island addition (with electrical) | $6,000 – $12,000 |
What pushes price up in Fontana is usually hidden house condition – original galvanized plumbing, cloth-wrapped romex, or floor joists that need sistering. We write line-item quotes and don’t change the price once work starts unless you change the scope.
How long does a full kitchen remodel take in Fontana?
A full kitchen gut and rebuild in Fontana typically takes 6 to 10 weeks, depending on permit review at City of Fontana and the condition of the framing and plumbing we uncover. Call (855) 594-0655 for a realistic timeline on your specific house.
Do you pull permits for kitchen remodels in Fontana?
Yes. We pull every required permit through the City of Fontana and handle the inspections ourselves. Call (855) 594-0655 if you want to know which permit category your remodel falls under – estimates are free.
Brands We Service in Fontana
For Fontana ADU projects, we work most often with Cover, Dvele, and Boxabl – three very different prefab approaches that suit different lot conditions, budgets, and timelines. Our local crews handle the full installation and interior finish, so the unit you spec is the unit that gets built. Our brands page lays out the tradeoffs in plain language.
Pricing for ADU Company in Fontana, CA
| Service | Typical range in Fontana |
|---|---|
| Full kitchen gut and rebuild | $45,000 – $90,000 |
| Cabinet and countertop replacement | $18,000 – $35,000 |
| Kitchen island addition (with electrical) | $6,000 – $12,000 |
| Prefab ADU (per sq ft, installed) | $350 – $550 |
| Site-built ADU (per sq ft, finished) | $400 – $700 |
| Garage conversion to ADU | $120,000 – $250,000 |
| Bathroom remodel (mid-grade, full) | $18,000 – $35,000 |
| Bathroom remodel (mid-grade, shower only) | $8,000 – $15,000 |
Fontana prices skew toward the upper half of those ranges when we’re dealing with pre-1970s construction, because a higher share of the budget goes into replacing original plumbing, wiring, and framing. You’ll get a fixed, line-item price before we start, and that price holds unless you add scope.
Neighborhoods We Serve in Fontana
We work throughout Fontana, from the older 92335 core with its wide lots and alley-side garages to the newer 92336 and 92337 subdivisions where HOA design review adds a layer to ADU and exterior work. Most of our calls come from neighborhoods where the homes have been in one family for decades and the kitchen or bathroom is finally getting its first full remodel.
- Downtown Fontana (92335)
- Southridge (92336)
- Sierra Lakes (92336)
- North Fontana (92336/92337)
- Walnut Village area (92335)
We schedule estimates across Fontana throughout the workweek, with most homeowners getting on the calendar within a few days of calling for the first time.
Service Area – Cities Near Fontana
Sapphire ADU Builders works across the western Inland Empire from our Perris base, so we regularly take on ADU and interior remodel projects in Bloomington, CA, Rialto, CA, Glen Avon, CA, and Pedley, CA. Each of those cities has its own permit quirks and housing-era patterns, and we’ve built enough in the area to know which ones match which prefab brands.
Serving Fontana, CA — Our Local Coverage Area
We’re based in the Fontana 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 ADU Company in Fontana
We schedule Fontana estimates within a few days of your call and typically start permitting work immediately after you approve a scope. Since ADU is all we do, we’re not juggling commercial jobs or other trade schedules.
If your home is in a 92336 or 92337 subdivision with an active HOA, yes, you’ll likely need design review before the city will sign off. Older 92335 neighborhoods usually have no HOA, but we always verify early so it doesn’t stall the permit.
Yes. We prepare the plans, submit to the City of Fontana, track the review, and meet inspectors on site. Homeowners don’t sit on hold with the building department – that’s part of what you’re paying for.
If you’re ready to price a kitchen remodel, bathroom refresh, or backyard ADU in Fontana, call (855) 594-0655. We’ll talk through your house, your lot, and what the city will require, then schedule a free estimate.
What happens when you call
- 1A real person answersNo phone trees — talk to a local adu 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 Fontana Customers Say
"He gave us a realistic rental number for the finished unit rather than the optimistic one, and it's renting for about what he said."
— Marcus Boyd"The kitchenette layout he suggested made better use of the space than the one on our original sketch."
— Marco Ramirez"Knew the local setback and parking rules cold, which saved us from designing something that would never have been approved."
— Keisha Hampton