Fast, Reliable Bathroom Remodeling Across Fontana
Bathroom remodeling in Fontana usually costs between $18,000 and $45,000 for a full gut renovation, with master baths in older South Fontana tracts often landing at the higher end because of hidden code upgrades. We’re Bungalow ADU Builders, and our Bathroom Remodeling team has spent enough time inside Fontana’s 1950s stucco tract homes to know exactly what those walls hide. If you’re planning a remodel anywhere from the 92335 ZIP around City Hall up to the 92336 subdivisions north of Summit Avenue, call us at (866) 730-4828 for a free estimate and we’ll walk you through what to expect before demolition starts.
Why Bungalow ADU Builders Is the Bathroom Remodeling Team Fontana Homeowners Call
Fontana’s housing stock runs older than people expect, particularly the post-WWII Kaiser Steel-era homes south of Foothill Boulevard. That means remodels here involve different decisions than a remodel in a 2005 north Fontana subdivision. We’ve worked in the neighborhoods around Jurupa Hills, the streets off Sierra Avenue, and the ranch-style blocks near Mary Vagle Nature Center, so we know which homes are likely to have cast-iron drain lines and which ones were built after copper became standard. That local knowledge changes the way we estimate, the way we stage the work, and the way we communicate with you.
Homeowners across Fontana tell us the same thing: they want a contractor who doesn’t flinch when the wall comes open and the wiring is cloth-wrapped. Nate Calloway built this company around exactly that scenario. The estimate process includes an inspection-first approach, with allowances written into the contract for the code upgrades older bathrooms almost always need. You know the range before we start, and any surprise still gets priced and approved in writing before we touch it.
Our Bathroom Remodeling Services in Fontana
Inspection and Code Upgrade Allowance
Every older Fontana bathroom remodel starts with a careful inspection. Homes built between 1950 and 1970 in the tracts around the 92335 and 92337 ZIPs frequently have galvanized supply lines and cast-iron drains that fail under pressure testing once walls are opened. We write a code upgrade allowance into the contract so you’re not blindsided. When our crew opens a wall and finds problems, we stop, document it, and get your signature on a change order before proceeding.
On a remodel in the 92335 ZIP, our crew opened a wall behind the tub and found cloth-wrapped wiring and a 1.5-inch drain that failed a water test. We paused work, wrote a change order, and got the homeowner’s signature before replacing the wiring and upsizing the drain. We finished the job with no further surprises. That’s the standard we hold on every Fontana project.
Waterproofing and Tile Replacement
Fontana’s hot, dry climate fools a lot of homeowners into thinking waterproofing isn’t critical here, but the original bathrooms in South Fontana tract homes often have tile set on greenboard or mastic with zero vapor barrier. Once demolition starts, hidden mold and rotten framing show up. We replace the substrate properly, install modern waterproofing membranes, and tile over a surface that will actually survive Fontana’s 100-degree summers and Santa Ana wind pressure changes without failing.
Electrical and Plumbing Repiping
Opening walls in a pre-1960 Fontana home usually triggers electrical and plumbing code upgrades. The original 60-amp panels in many South Fontana homes can’t support a modern bathroom’s GFCI requirements, heated flooring, or dual-sink vanity lighting. We handle the panel upgrade conversation honestly. We’ll tell you whether your existing panel can carry the added load or whether you need a service upgrade, and we’ll price it before we cut drywall.
Shower and Tub-to-Shower Conversions
Walk-in showers are the most-requested feature in Fontana remodels, especially in homes where multi-generational families share one bathroom. Converting a standard tub to a curbless walk-in shower with a bench and grab-bar blocking works well in the larger floor plans common to 1950s and 1960s tract homes, but framing changes are often needed because original 2×4 stud bays can’t carry the load. We account for that in the estimate rather than discovering it mid-job.
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 Use in Fontana
We’re familiar with James Hardie fiber-cement products for bathroom-adjacent work like exterior wall penetrations and window trim, which matters when a remodel means re-routing a vent through an exterior stucco wall. For ADU bathroom finishes, we source from the same roster of prefab and modular brands homeowners researching an Fontana ADU already know, including Boxabl and Plant Prefab. The same team that finishes an ADU bathroom can tackle the remodel in your main house, so tile, waterproofing, and fixture standards stay consistent.
Common Bathroom Remodeling Problems We See in Fontana Homes
- Failed galvanized supply lines. Pre-1960 Fontana homes often have original galvanized water lines that have corroded from the inside. Once walls are opened and water is shut off and restored, pressure changes can cause pinhole leaks. We test everything before closing walls.
- Undersized drain lines. Original 1.5-inch drains in 1950s bathrooms don’t meet current code for modern shower fixtures and toilets. Upsizing to 2-inch or 3-inch drains through floor joists is common on South Fontana remodels and is a cost we talk about before work begins.
- Missing waterproofing behind tile. We regularly remove 1950s through 1970s tile in Fontana and find greenboard that’s turned to dust or mastic that’s lost its bond. Hidden mold behind a tub surround is one of the most common discoveries, and it’s a health issue we address honestly when we find it.
- Unpermitted past work. Older Fontana tracts have a history of unpermitted bathroom additions and garage conversions. If the bathroom you’re remodeling was never permitted, it has to be legalized, which can trigger plan review, inspections, and additional code upgrades. We handle that process for you and explain the timeline up front.
Pricing for Bathroom Remodeling in Fontana, CA
A full bathroom remodel in Fontana runs $18,000 to $45,000 depending on scope and what’s behind the walls. A cosmetic refresh with new tile, vanity, fixtures, and lighting in a 1980s north Fontana home might stay under $22,000. A master bathroom gut with full waterproofing rebuild, drain upsizing, electrical upgrades, and a curbless walk-in shower in a 1950s South Fontana home typically lands between $30,000 and $45,000. The hidden variables are what move the number: cast-iron drain replacement, electrical panel upgrades, and structural framing corrections. We put those into a written allowance line so you see the full potential range before signing. Call (866) 730-4828 for a free itemized estimate. We’ll inspect the bathroom, test what we can, and give you real numbers for your specific house.
We Also Serve Cities Near Fontana
We regularly work in Bloomington, Rialto, Glen Avon, and Pedley, so if your project sits close to a Fontana border we likely already know the neighborhood. Our full Bathroom Remodeling in Fontana coverage area includes all four nearby communities and the surrounding Inland Empire neighborhoods.
Serving Fontana, CA — Our Local Coverage Area
We’re based in the Fontana area and know this community well, and we offer Cover service in Fontana. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Bathroom Remodeling in Fontana
Because the original construction materials from the 1950s and 1960s frequently fail inspection once exposed. Galvanized supply lines that tested fine before demolition often fail pressure testing after. Cast-iron drains may be cracked. Framing may be undersized or water-damaged. A quote that stays flat after walls are opened means someone is ignoring problems, not avoiding them. We include a code upgrade allowance in every Fontana quote so the range is on paper from day one. Call (866) 730-4828 to talk through what your specific home might need.
Yes, but the unpermitted work must be legalized first, and that process triggers plan review and current-code inspections before the bathroom remodel can be signed off. In older South Fontana tracts where unpermitted conversions are common, this adds time and cost. We handle the legalization paperwork and inspection coordination so you don’t have to navigate the city’s building department alone. Call us at (866) 730-4828 and we’ll look up your property’s permit history and tell you what you’re facing.
The standard triggers are electrical, plumbing, and framing. Original 2×4 studs in 1950s Fontana homes often don’t meet current structural requirements for new shower enclosures or wall-hung vanities. Cloth-wrapped wiring must be replaced where exposed. Galvanized supply lines usually need replacing with copper or PEX. And 1.5-inch drains need upsizing to 2-inch minimum. We list these as expected upgrades in our pre-construction walkthrough so you know what’s coming. Get a free estimate at (866) 730-4828.
Proper waterproofing matters in Fontana precisely because the dry air hides moisture problems until mold has already spread. We use full-surface waterproofing membranes behind tile, not greenboard, and we re-route ventilation to meet current code for humidity control. In a hot climate, a bathroom that doesn’t dry out properly becomes a mold factory. Our approach is to build it right the first time so you never see that problem.
Often yes. Many 1950s and 1960s Fontana homes still have 60-amp or 100-amp panels that can’t support heated bathroom flooring, GFCI-protected circuits, modern lighting, and a bathroom exhaust fan with a humidity sensor. We assess your panel capacity during the initial inspection and tell you upfront whether a service upgrade is required. No surprises. Call (866) 730-4828 to schedule a free walkthrough and we’ll check your panel as part of the estimate.
Written by Nate Calloway, Owner at Bungalow ADU Builders, serving Fontana and the Inland Empire.