Fast, Reliable Bathroom Remodeling Across Fontana
A full bathroom remodel in Fontana typically runs $18,000 to $38,000 depending on the home’s age and what’s behind the walls. That range isn’t random. Homes west of Sierra Avenue in 92335 were built in the 1950s and 60s and almost always need electrical and framing work before any tile goes in, while 92336 and 92337 subdivisions from the 1980s through 2000s fail most often on builder-grade waterproofing at the shower wall. We know both failure modes well, and we price them honestly from the first estimate, not the change order.
Westminster ADU Builders handles bathroom remodeling across Fontana with the same discipline we bring to full ADU construction. Nate Calloway leads our team, and our approach is simple: pre-demo inspection first, written allowances for the known unknowns, and signed change orders for anything we uncover. Call (833) 620-3521 to schedule a free estimate.
Why Westminster ADU Builders Is Fontana’s Preferred Bathroom Remodeling Company
We’re an ADU-first contractor, which means bathroom remodeling isn’t a side trade we dabble in. It’s part of the same scope we execute on every accessory dwelling unit we build, from rough-in to finished shower. The waterproofing, venting, and electrical standards that pass inspection in a new ADU are the same standards we apply to a 1960s hall bath in Fontana. We don’t lower the bar because the house is older.
Our familiarity with Fontana’s housing stock runs deep. We’ve worked in the post-war ranch tracts along Merrill Avenue and Randall Avenue in 92335, in the stucco-and-tile subdivisions east of Sierra Avenue, and in newer planned communities in 92336 and 92337. That matters because a bathroom remodel in a 1958 steel-and-slab ranch fails differently than one in a 1995 tract home, and the fix is different too. We write estimates that reflect the actual house, not a generic square-foot price.
Fontana homeowners also get direct access to Nate Calloway, the owner, from the first walkthrough through final inspection. There’s no account manager handoff. No subcontractor you have to chase. One contract, one point of accountability, one team that shows up to the jobsite.
Our Bathroom Remodeling Services in Fontana
Full Bathroom Gut Renovation
We take the bathroom down to studs or slab, whichever the house requires, then rebuild it to current code. In Fontana’s older 92335 homes, that usually means reframing the wet wall, replacing the shower pan, addressing any slab-level water damage, and bringing the circuit up to GFCI standard. In newer 92336/92337 homes, the gut renovation is more about replacing failed waterproofing and builder-grade fixtures with materials that hold up. We handle both paths.
Shower and Tub Surround Replacement
The shower surround is where Fontana remodels most often go wrong. Tiling over a failed pan or missing vapor barrier means the leak comes back within a season, and by then the new tile is already compromised. We strip the surround to the framing, inspect what’s behind it, install proper backer board and waterproofing membrane, and only then set tile. For homes near the Cajon Pass wind corridor, we also seal all exterior wall penetrations around vent and supply lines before closing the wall.
Bathroom Accessibility Upgrades
Many Fontana homeowners are planning for multigenerational living, often tied to an ADU on the same lot. We build curbless showers, reinforced grab-bar blocking, wider door openings, and comfort-height vanities that work for aging parents or a disabled family member. The work gets spec’d to ADA-compatible dimensions where practical, and it’s the same crew that builds accessible bathrooms in ADUs.
Bathroom Updates for New ADUs
If you’re building a detached ADU in the rear yard of your Fontana property, the bathroom inside it isn’t an afterthought. We rough in, waterproof, and finish the ADU bathroom as part of the same contract that pours the foundation and frames the walls. No handoff to a third-party remodeler. You get one team from groundbreak to the last towel bar, and we use James Hardie backer board behind every wet wall we build.
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.
Trusted Brands We Service in Fontana
We install and service bathroom fixtures and materials from brands that hold up to Fontana’s specific conditions: hard water, high summer heat, and wind-driven dust. That includes James Hardie backer board for every wet wall we open, Kohler and Delta fixtures where the homeowner prefers them, and Schluter waterproofing systems on shower rebuilds. We don’t stock generic big-box components and hope they last. We also bring our ADU construction standards into every remodel, which means the same waterproofing and venting detail we use on new accessory dwelling units gets applied to the bathroom in your existing home. Fontana homeowners get our team’s full Bathroom Remodeling capability without having to coordinate multiple vendors.
Common Bathroom Remodeling Problems We See in Fontana Homes
- Failed shower pans in 1950s-60s ranch homes: In 92335, the original pans were often lead or early PVC, and by now they’ve been leaking into the slab for decades. The tile above looks fine until you pull it and find the subfloor is gone. We inspect the pan before quoting anything else.
- Undersized electrical panels: West-of-Sierra homes frequently still run on the original 100-amp panel. Adding a GFCI bath circuit mid-demo can trip the whole house, and a permit-triggered service upgrade becomes mandatory. We look for this during the pre-demo inspection, not after the walls are open.
- Builder-grade waterproofing failures in 92336/92337: 1980s and 90s tract homes often used green board or thin vinyl liners behind the shower tile. Once the grout cracks, water gets behind the wall. The fix is a full wet-wall rebuild with modern membrane and backer board, not a re-grout.
- Cajon Pass wind-driven dust intrusion: Afternoon winds funnel through the Pass and push fine dust into any unsealed wall penetration around vents and supply lines. That degrades insulation, dries out caulk joints, and shortens the life of exterior wall assemblies. We seal those penetrations on every bathroom that shares an exterior wall.
Pricing for Bathroom Remodeling in Fontana, CA
Here’s what we see in Fontana’s current market:
- Shower or tub surround replacement: $6,500 – $12,000
- Full bathroom gut renovation in 92335 (1950s-60s home): $22,000 – $38,000, with electrical service upgrades and wet-wall reframing typically included
- Full bathroom renovation in 92336/92337 (1980s-2000s home): $18,000 – $30,000, with waterproofing rebuild as the main driver
- Bathroom inside a new detached ADU: $15,000 – $25,000 as part of the full ADU contract
The biggest cost variable in Fontana is hidden condition: what’s behind the walls and under the pan. That’s why we do a pre-demo inspection and write allowances into the contract for electrical, framing, and waterproofing unknowns. Every change is priced and approved in writing before we touch it. Call (833) 620-3521 for a free, itemized estimate on your specific property.
We Also Serve Cities Near Fontana
Westminster ADU Builders serves Fontana and the surrounding communities of Bloomington, Rialto, Glen Avon, and Pedley. If your property sits in one of these nearby cities, the same inspection-first approach and written allowance process applies. We know the local building departments, the common housing stock, and the typical condition issues in each area.
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
Because west-side 92335 homes were built with steel-and-slab construction and the original electrical and plumbing are nearly always undersized by today’s code. Once walls are open, you’re looking at a 100-amp panel that can’t carry a new GFCI circuit, cloth-sheathed branch wiring, and a shower pan that’s been leaking into the slab. The tile itself is the cheap part. We inspect before demo, write allowances for these known conditions, and sign change orders before any extra work starts. Call (833) 620-3521 for an exact quote on your home.
Yes, if you’re moving plumbing, altering framing, or adding a circuit. That covers most real remodels. The City of Fontana will trigger code upgrades once walls are open, including GFCI protection, proper venting, and sometimes a full panel service upgrade on older homes. We pull the permit, schedule the inspections, and pass them. It’s part of the job, not an add-on.
Most 1990s tract homes in Fontana used green board behind shower tile, which is not waterproof. Once the grout cracks, water gets behind the wall and rots the framing. That’s a builder-grade material failure, not a maintenance issue. The fix is a full wet-wall rebuild with cement board, waterproofing membrane, and proper pan construction. That’s what we do.
The afternoon winds push fine dust into any unsealed penetration around vents, supply lines, and exterior wall cavities. Over time that dust degrades insulation and dries out caulk joints, which shortens the life of the wall assembly. On any bathroom that shares an exterior wall, we seal those penetrations before closing up, and we spec materials that handle high heat and wind-driven grit. Call (833) 620-3521 to talk through what your specific property needs.
Very possibly. West-of-Sierra 92335 homes often still run on 100-amp panels that are already near capacity. Adding a dedicated GFCI bath circuit can push the load over the limit, which means a service upgrade to 200 amps. That’s a $3,000 to $6,000 line item, and it’s exactly the kind of surprise we catch in the pre-demo inspection. We’ll tell you before we start, not after the walls are open.
Call Westminster ADU Builders for Your Fontana Bathroom Remodel
If your Fontana bathroom needs a real fix, not a tile refresh, call Nate Calloway and the team at Westminster ADU Builders. We inspect first, price honestly, and keep the work on one contract from demo to final inspection. Serving all of Fontana, including 92335, 92336, 92337, and 92331. Call (833) 620-3521 to schedule your free estimate.
Written by Nate Calloway, Owner at Westminster ADU Builders, serving Fontana and the Inland Empire.