Fast, Reliable Bathroom Remodeling Across Fontana
Bathroom remodeling in Fontana typically costs $14,000 – $28,000 for a full gut renovation of a standard 5×8 hall bath, with master baths running $28,000 – $55,000 depending on scope. Most projects take three to five weeks once demolition starts. The wildcard in Fontana is what’s behind the walls: homes built between 1950 and 1985 often hide galvanized pipe corrosion and framing that was never built to today’s code. We approach every Fontana job with an inspection-first process, so you know the real number before we swing a hammer. Call (833) 589-8273 to schedule a free, no-pressure estimate at your home.
Why Costa Mesa ADU Builders Is Fontana’s Preferred Bathroom Remodeling Company
We’ve remodeled bathrooms across Fontana’s 92335, 92336, and 92337 ZIP codes long enough to know exactly what gets uncovered when walls open up in these homes. South Fontana’s 1960s stucco tracts off Jurupa Avenue have different wiring than the 1980s subdivisions north of the 210 near Summit Heights. That local knowledge means our quotes account for what’s likely before we ever cut drywall.
Nate Calloway runs our remodeling division with a straightforward rule: the number we quote is the number we stand behind unless we find something genuinely hidden and get your written approval to change it. Fontana homeowners tell us this is the reason they chose us over larger outfits that treat change orders like a foregone conclusion. We work in Fontana every week, and our crews know the permitting desk at Fontana City Hall well enough to flag inspection issues before they stall your project.
The Bathroom Remodeling side of our business operates with the same accountability we bring to full ADU builds. That matters when your contractor needs to understand how a bathroom renovation might connect to future plans for a garage conversion or a detached ADU in the backyard. One team, one contract, one person responsible from first inspection to final walkthrough.
Our Bathroom Remodeling Services in Fontana
Full Bathroom Remodels
A full gut remodel in a Fontana home means taking the room down to studs and rebuilding it correctly. We handle layout changes, shower and tub replacement, flooring, lighting, ventilation, and all finish work. For homes in 92335 with original 1960s bathrooms, this also means addressing what wasn’t done right the first time: undersized joists, missing blocking, and plumbing that’s reaching the end of its service life.
Waterproofing and Tile Installation
Fontana’s hot, dry climate doesn’t exempt bathrooms from moisture problems. The issue is condensation and shower steam meeting drywall that was never intended to get wet. We install full waterproofing systems, such as Schluter Kerdi membranes, behind every shower and tub surround we tile. For homes in Fontana where original tile was set directly on greenboard, this upgrade alone prevents the slow water damage that quietly rots plate framing over decades.
Plumbing and Electrical Upgrades
Opening walls in Fontana’s older housing stock almost always reveals galvanized pipe that should have been abandoned twenty years ago. We replace it with PEX supply lines and ABS or cast iron drains as needed. Electrical upgrades follow the same logic: many 1960s bathrooms in Fontana run on a single 15-amp circuit shared with a bedroom, which won’t support a modern GFCI setup, heated floors, or a properly vented fan. We pull permits for this work and bring everything to current California code.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Fontana
We install and work around the fixtures Fontana homeowners actually choose: Kohler, Delta, Moen, and American Standard for plumbing, Schluter and Wedi for waterproofing substrates, and James Hardie backer board where we need a rock-solid tile base in high-moisture zones. Our relationship with manufacturers means Fontana jobs get materials delivered directly to the site without the markup you’d see from a big-box remodeler who sources off the shelf. If you’re planning a bathroom upgrade alongside a prefab ADU from Dvele or Boxabl on your Fontana lot, we can coordinate material deliveries so both scopes move without interference.
Common Bathroom Remodeling Problems We See in Fontana Homes
- Galvanized-to-copper transitions corroding inside walls. Homes built in Fontana before 1970 commonly had galvanized supply lines that later got spliced to copper without a dielectric union. The dissimilar metals corrode at the joint, and the first sign is usually a mystery stain on the ceiling below. We find this on roughly a third of the bathrooms we open in 92335.
- Original framing that’s undersized or water-damaged. Many Fontana tract homes from the 1950s and 1960s used 2x4s at 24-inch centers with no water-resistant barrier behind the tile. Once tile is stripped, we frequently see bottom plates that crumble when probed. Reframing is a real cost, and we show you the evidence before we ask for approval.
- Failed or missing waterproofing behind older tile. Before modern waterproofing membranes, tile was often set on drywall or greenboard. In Fontana homes that have seen forty years of shower use, the result is hidden mold and subfloor rot. We don’t tile over that. We cut it out, replace the substrate, and install a proper membrane.
- Single-circuit electrical that can’t support a modern bathroom. A 1968 hall bath in Fontana often shares a breaker with the hallway and one bedroom. Adding a heated floor, a humidity-sensing fan, and a properly placed GFCI outlet requires a dedicated 20-amp circuit. We handle that as part of the remodel, not as a surprise add-on.
Pricing for Bathroom Remodeling in Fontana, CA
A hall bath gut remodel in Fontana runs $14,000 – $28,000. A master bath with a larger footprint, a double vanity, and a separate tub and shower typically lands between $28,000 and $55,000. If you’re doing a light refresh, such as a new vanity, toilet, flooring, and paint without moving plumbing, that usually stays in the $6,000 – $12,000 range.
What moves the number in Fontana specifically is what’s behind the walls. Homes in 92335 with galvanized pipe and 24-inch on-center framing should budget an extra $2,000 – $6,000 for plumbing replacement and reframing. We write those items into the contract as allowances, so they’re funded from day one rather than appearing as a surprise change order. Call (833) 589-8273 for a fixed, line-item quote on your Fontana bathroom. Estimates are free, and we don’t pressure you to sign on the spot.
How We Handle Hidden Conditions in Fontana Bathrooms
In Fontana’s 92335 ZIP, many post-WWII and 1960s tract homes have bathrooms framed with 2x4s at 24-inch on-center and no original water-resistant barrier. That means opening a wall for a remodel routinely requires full re-framing and sheathing upgrades that aren’t obvious until demolition. We’ve learned to plan for this. Our quotes include a written allowance for these conditions, and we walk you through photos and measurements when we find something. You approve the change in writing before we proceed. No surprises, no “while we’re at it” upselling.
We recently remodeled a hall bath in a 1962 stucco tract home off Sierra Avenue in north Fontana. Once we opened the wall behind the tub, we found the original galvanized supply lines had been spliced with copper without a dielectric union. The joint had corroded and was leaking slowly, and the bottom plate had rotted enough that a screwdriver went through it. We replaced the framing, upgraded the supply lines to PEX, and installed a new waterproofing membrane and cement board before setting the tile. The homeowner approved the change order in writing before we proceeded. That’s how we work in Fontana: find it, show you, get your sign-off, and fix it right.
We Also Serve Cities Near Fontana
We serve Fontana and the surrounding communities, including Bloomington, Rialto, Glen Avon, and Pedley. If you’re in one of these areas and planning a bathroom remodel or an ADU addition, the same inspection-first process applies. Call us at (833) 589-8273 to schedule an estimate.
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 – Bathroom Remodeling in Fontana
We typically find galvanized supply lines that are either actively corroding or already spliced to copper without a proper dielectric union, framing that’s either undersized or has water damage at the bottom plate, and original tile that was set directly on drywall or greenboard with no waterproofing membrane. The condition varies by neighborhood: older 92335 homes are more likely to have these issues than 1980s-era homes north of the 210. Call (833) 589-8273 and we’ll assess your specific bathroom before quoting.
We write allowances into our Fontana contracts for known risks, such as reframing, PEX repiping, and electrical upgrades, so the money is already there when we find something. When we encounter something truly unexpected, we stop work, document the condition with photos and measurements, and get your written approval on a change order before proceeding. You never pay for work you didn’t authorize, and you’re never left guessing what the final bill will be.
In Fontana, the answer is usually yes for targeted upgrades such as replacing a vanity and faucet, swapping a toilet, or adding GFCI protection. But if you’re moving plumbing, changing the tub or shower footprint, or opening walls and finding old wiring, the state’s Title 24 energy code and local building codes will require additional work, such as ventilation upgrades and dedicated circuits. We’ll tell you what’s mandatory and what can wait, and you can call (833) 589-8273 for an honest read on your options.
We use sheet membrane systems such as Schluter Kerdi on shower and tub surrounds, with cement board or James Hardie backer as the substrate. For floors, we install a decoupling membrane before tile. This is what prevents the hidden mold and rot that we commonly find in older Fontana homes where tile was set directly on drywall.
Yes, if you’re moving plumbing, altering framing, or changing the electrical layout, Fontana’s building department requires a permit. We pull permits for all work that requires them and schedule inspections directly with the city. Work that stays strictly cosmetic, such as painting and replacing a vanity without moving plumbing, generally doesn’t need one. We’ll tell you exactly what your scope requires before we start, and you can call (833) 589-8273 for a free estimate that includes the permit path.
Get Your Fontana Bathroom Remodel Started
If you’re planning a bathroom remodel in Fontana, start with an inspection. We’ll walk your home, open access panels where we can, and give you a fixed, line-item quote that accounts for what’s likely behind your walls. Call (833) 589-8273 to schedule your free estimate. Nate Calloway and our remodeling team serve all of Fontana, including 92335, 92336, 92337, and 92331.
Written by Nate Calloway, Owner at Costa Mesa ADU Builders, serving Fontana and the Inland Empire.