ADU Company in Fontana, CA
Kitchen remodeling in Fontana usually costs between $35,000 and $85,000 for a full renovation, with galley kitchens in the 1950s-1970s tract homes on the south side landing near the lower end and open-concept knock-downs in the newer 92336 subdivisions pushing toward the top. What makes Fontana work different is the housing stock itself: pre-1978 builds dominate the central and southern tracts, which means lead-paint protocols, cast-iron drain lines, and load-bearing walls that were never meant to come down without reinforcement. Sentinel ADU Builders approaches every Fontana kitchen as a structural project first and a finish project second. Call (855) 341-3461 to schedule a free estimate.
Why Fontana Homes Are Different
Fontana sits in the hot, dry Inland Empire, where summer temperatures regularly top 100°F and Santa Ana winds sweep through the foothill corridors. That shapes every kitchen remodel decision, from ventilation sizing to the placement of west-facing windows. A wall oven against a west exterior wall in an uninsulated 1960s tract home will fight the afternoon heat for the life of the appliance. We account for that before the first stud moves.
The older housing stock brings its own realities. Homes built before 1978 trigger lead-paint testing on any wall or ceiling we cut into. Cast-iron drain stacks in 1950s and 1960s slabs are often at the end of their service life, and a kitchen remodel is the right moment to address them rather than burying a failing pipe behind new cabinets. Many of these homes also carry original 100-amp electrical panels that cannot support a modern kitchen with induction cooktops, double ovens, and dedicated circuits for a refrigerator and microwave. Fontana’s newer north-side 92336 subdivisions present a different set of constraints: HOA design-review timelines, stricter noise windows, and floor plans that are often more open already, which changes the scope of what a remodel needs to accomplish.
We work in Fontana’s ZIP codes 92334, 92335, 92336, and 92337, and the permit path differs between the older city core and the HOA-governed north side. We pull permits on every job, and we schedule inspections rather than asking homeowners to manage them.
Our Main Fontana Services
Fontana homeowners call us most often about two things: building an ADU to house family or generate rent, and remodeling bathrooms in homes that have not been touched since the original build. Both require the same structural literacy and permit fluency.
ADU Builders in Fontana
Fontana’s older tract neighborhoods, with their deep rear yards, alley-loaded lots, and detached two-car garages, are among the best ADU conversion candidates in the Inland Empire. A detached garage conversion off an alley can get its own driveway access and utility routing without tearing up the main yard. We assess the slab, the electrical service, and the setback envelope before recommending a prefab platform like Cover, Dvele, or Boxabl versus a site-built frame. See how we approach full ADU construction on our ADU Builders in Fontana page.
Bathroom Remodeling in Fontana
Bathrooms in Fontana’s 1950s-1970s homes are small, often five-by-eight feet, with original cast-iron tubs and single-sink vanities. Many homeowners want to convert a tub to a walk-in shower, which requires reworking the drain location and waterproofing to current code. We handle the full scope, including moving walls where the floor plan allows and upgrading the ventilation to handle Fontana’s dry-heat swings. Details are on our Bathroom Remodeling in Fontana page.
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
Fontana kitchens come in two broad types: the closed-off galley or U-shape in the 1950s-1970s south and central tracts, and the semi-open plan in newer north-side 92336 builds. The older kitchens are almost always dark, under-ventilated, and built around a single 220-volt outlet for an electric range. Fontana’s heat makes ventilation and cooling capacity a bigger deal here than in coastal cities, and pre-1978 homes add lead-paint and cast-iron drain protocols to the scope.
Sentinel ADU Builders handles kitchen remodeling as a full-scope trade: demolition, structural work, rough plumbing and electrical, drywall, finish carpentry, and tile. We are not a design-only firm that hands you to three subs. For a broader look at our approach, see Kitchen Remodeling.
Galley Kitchen Expansion
Signs you need it
You are working in a single-file kitchen with less than 36 inches of clearance between counters, and two people cannot stand in the room at the same time without choreography.
What it costs in Fontana
Opening a load-bearing wall to merge a galley kitchen with a dining room in Fontana typically runs $55,000 to $85,000 including the beam, HVAC rebalancing, and full kitchen finishes.
How we do it
We demo to the studs, install a flush beam or header per the structural engineer’s letter, relocate plumbing and electrical as the new layout demands, then rebuild with insulation, drywall, and finish surfaces in sequence.
Full Kitchen Renovation
Signs you need it
Cabinets are delaminating at the base, drawers no longer close square, and the layout has not changed since the home was built, leaving dead corners and a range jammed against a side wall.
What it costs in Fontana
A complete kitchen renovation in Fontana, keeping the existing footprint but replacing everything inside it, typically falls between $35,000 and $70,000 depending on cabinet grade, countertop material, and whether we replace the cast-iron drain line while walls are open.
How we do it
We remove the full finish package down to framing, update the plumbing and electrical to current code, then install new cabinets, counters, appliances, flooring, and lighting with a single project schedule.
What Kitchen Remodeling Costs in Fontana
| Item | Typical range in Fontana |
|---|---|
| Full kitchen renovation (existing footprint) | $35,000 – $70,000 |
| Galley kitchen expansion (load-bearing wall removal) | $55,000 – $85,000 |
| Countertop and cabinet replacement only | $18,000 – $35,000 |
Costs climb in Fontana when the home predates 1978 and lead-paint containment is required, when the electrical panel needs a service upgrade from 100 to 200 amps, or when HOA design review adds time on the north side. We give a written, line-item quote before work starts, and the price does not change without a signed change order.
How long does a kitchen remodel take in Fontana?
A full kitchen remodel in Fontana runs six to ten weeks from demo to final inspection. Older homes with cast-iron drain replacement or panel upgrades land at the longer end. Call (855) 341-3461 to get a timeline for your specific home.
Will the price change once work starts?
No, unless you change the scope. We write a detailed line-item quote before the contract and use signed change orders for any additions. Hidden conditions like rotted framing or failed drain lines get documented and priced before we proceed. Call (855) 341-3461 for a fixed-price estimate.
Brands We Service in Fontana
We build and install across the leading prefab ADU platforms, including Cover, Dvele, and Boxabl, and we are also deeply familiar with Mighty Buildings’ panelized approach. Because we are not tied to one manufacturer’s inventory, the recommendation follows your lot, budget, and timeline. See our brands for the full comparison.
Pricing for ADU Company in Fontana, CA
| Service | Typical range in Fontana |
|---|---|
| ADU garage conversion (attached, 400-500 sq ft) | $120,000 – $180,000 |
| ADU garage conversion (detached, 400-500 sq ft) | $140,000 – $200,000 |
| ADU site-built detached new build (600-800 sq ft) | $250,000 – $350,000 |
| ADU site-built detached new build (800-1,000 sq ft) | $350,000 – $450,000 |
| Prefab/modular ADU platform (installed, including site work) | $180,000 – $320,000 |
| Kitchen full renovation (existing footprint) | $35,000 – $70,000 |
| Kitchen galley expansion (load-bearing wall removal) | $55,000 – $85,000 |
| Bathroom remodel (standard 5×8, full replacement) | $22,000 – $38,000 |
| Bathroom remodel (larger or layout change) | $38,000 – $60,000 |
Fontana pricing shifts on three fronts. First, homes built before 1978 trigger lead-paint protocols that add containment and testing costs to any wall or ceiling work. Second, many 1950s-1960s slabs hold cast-iron drain lines at end-of-life, and replacing them while walls are open is cheaper than a future trench job. Third, HOA design review in north Fontana’s 92336 subdivisions can add weeks and, occasionally, specific material requirements. Every quote is written, line-itemed, and fixed before we begin.
Neighborhoods We Serve in Fontana
We work across all four Fontana ZIP codes and the neighborhoods within them, from the older central tracts near the 10 freeway to the newer subdivisions north of Summit Avenue. Response time for estimates in Fontana is typically within two to four business days.
- Southridge
- Downtown Fontana
- Sierra Lakes
- Walnut Village
- Northgate
Service Area – Cities Near Fontana
Sentinel ADU Builders operates out of Redlands and serves the surrounding Inland Empire communities. Homeowners in Bloomington, CA and Rialto, CA are minutes from our project team, and we regularly schedule estimates in Glen Avon, CA and Pedley, CA. If you are in an unincorporated pocket or a bordering city, call and ask, we will tell you straight whether we cover it.
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
Once we have a signed contract and permits are submitted, Fontana’s permit review typically takes three to eight weeks depending on scope and whether HOA review is required. We start scheduling the crew as soon as the permit is issued. Call (855) 341-3461 to check current lead times.
Yes. We prepare and submit the permit drawings, respond to plan-check comments, and pull the permits in our name. For HOA-governed properties in the north-side subdivisions, we prepare the submittal package, but the homeowner files it with the association since HOAs require owner signature.
Yes, and we are set up for lead-paint and asbestos protocols. We test before cutting, use certified containment when required, and document everything for the inspection record. Older homes are the majority of our Fontana kitchen and bath work. Call (855) 341-3461 to walk through your home’s specifics.
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 was honest that our lot had a slope problem that would add real cost, before we signed anything."
— Jamal Jackson"The kitchenette layout he suggested made better use of the space than the one on our original sketch."
— Doug Fletcher"Knew the local setback and parking rules cold, which saved us from designing something that would never have been approved."
— Allen Tran