Fast, Reliable Bathroom Remodeling Across San Bernardino
Bathroom remodeling in San Bernardino typically runs $18,000 – $42,000 for a full gut renovation of a standard 5×8 or 6×9 bath, with smaller refreshes starting around $9,000 and higher-end work in homes near North Park or the foothills reaching $55,000+. Most projects take 3 – 6 weeks once demo starts, depending on what’s behind the walls. We serve every San Bernardino ZIP code from 92401 through 92427, and our crews are in the city weekly. Call (833) 863-7015 for a free estimate that accounts for what your specific house is likely to throw at us.
We’re not a generalist remodeler that happens to take bathroom jobs in San Bernardino. We’re Bathroom Remodeling specialists who also build ADUs, which means we spend more time inside 1920s – 1950s stucco bungalows than most local contractors. That matters because opening walls in this city’s housing stock rarely goes according to the cosmetic plan. We’ll explain exactly what that means below.
Why Guest House ADU Builders Is San Bernardino’s Preferred Bathroom Remodeling Company
Our reputation in San Bernardino comes from doing the unglamorous work right: inspecting before we quote, writing allowances into the contract for what we can’t see, and pricing changes in writing before we pick up a hammer. Homeowners working with us on San Bernardino bathroom projects consistently tell us the same thing: the final invoice matched the conversation we had before demo. Not because nothing was found, but because we told them what might be found and what it would cost if it was.
The team is led by Nate Calloway, who has built his approach around one principle: the estimate should prepare you for the house you have, not the house you wish you had. When we quote a bathroom remodel in a 1940s North Park cottage, we’re pricing for what those walls usually contain. That’s not pessimism. It’s experience.
We’re a full-service shop. Bathroom work, kitchen work, ADU construction, all under one contract and one accountable team. If your San Bernardino property also needs a detached unit or garage conversion, the bathroom and the ADU get coordinated schedules, shared dumpsters, and one point of contact. From permit to punch-list, one team.
Our Bathroom Remodeling Services in San Bernardino
Full Bathroom Gut Renovations
Most San Bernardino bathrooms in pre-1960 homes are original or have one layer of cosmetic cover-up over original plumbing and wiring. A full gut means we take it to studs, replace what’s failed, and rebuild to current code. We handle the permit, the inspections, and the sequencing so you’re not showering in a neighbor’s house for an extra month. Expect a full gut to run $20,000 – $42,000 depending on size and what the walls reveal.
Tub-to-Shower Conversions
Older San Bernardino bungalows often have a single bathroom with a cramped tub. Converting to a walk-in shower usually runs $9,000 – $18,000, including new valve, drain relocation, waterproofing, and enclosure. On 1920s – 1950s framing, we almost always need to reinforce the floor joists under the new shower pan because the original tub sat on a different load path.
Bathroom Remodeling for ADU Structures
Since Guest House builds ADUs across San Bernardino, we routinely do bathroom work inside detached units, garage conversions, and alley-facing additions. The 2020s-era ordinance that made San Bernardino unusually friendly to ADUs also means many owners are pairing a rear unit with a main-house bathroom refresh. We can price and schedule both. One dumpster, one permit coordinator, one team.
Wet-Area Waterproofing and Repair
Failed waterproofing is the single most common discovery in San Bernardino bathroom walls. Original mud-set tile from the 1940s often has no membrane at all behind it. By the time homeowners see cracked grout or a soft spot in the hallway drywall, the framing behind the shower has been wicking moisture for years. We strip it, dry it, repair or replace damaged studs, and rebuild with a modern waterproofing system, not just a new tile face.
What happens when you call
- 1
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 San Bernardino
We specify materials we’d put in our own homes and that hold up under Inland Empire heat. Shower valves, drains, and supply lines come from brands our plumbers trust on warranty claims. For bathroom projects tied to ADU work, we often carry the same hardware spec across both structures, which simplifies future maintenance.
On the ADU side, we’re authorized to build with seven prefab manufacturers, including Boxabl, Plant Prefab, and Tuff Shed, and we compare them side-by-side before recommending anything. The same brand-agnostic approach applies to bathroom fixtures: we don’t have a drawer of clearance faucets we’re trying to unload. We spec based on what fits the house and the budget. Exterior work on any attached or detached structure we build uses James Hardie fiber-cement, because San Bernardino sun and Santa Ana winds punish cheap siding fast.
Common Bathroom Remodeling Problems We See in San Bernardino Homes
- Hidden knob-and-tube or early cloth wiring. In the 1920s – 1950s bungalows that dominate San Bernardino’s older streetcar grid, bathroom circuits were often added decades after the original build. We open the wall and find cloth-wrapped wiring feeding the vanity outlet. That’s a code-driven replacement, not a preference.
- Cast-iron drain lines with failing joints. Original cast-iron under the tub or toilet usually has a 60 – 80 year service life. Most San Bernardino homes in 92404, 92405, and 92410 are past that point. If the stack is cracked or the joints are weeping, the remodel just turned into a plumbing job. We catch most of this during the pre-demo inspection.
- Undersized or water-damaged framing. In houses built before modern building codes, studs in wet areas were often 2×3 instead of 2×4, and decades of slow leaks leave them structurally soft. You can’t hang a modern shower surround on a wall that flexes. We sister or replace framing before any tile goes up.
- Permit-triggered upgrades nobody budgeted for. San Bernardino’s building code requires GFCI outlets, a pressure-balancing valve, and sometimes a whole-room exhaust fan once you pull a permit for a bathroom remodel. If your estimate didn’t include these, that’s a red flag on the estimate, not a surprise fee from the city.
Pricing for Bathroom Remodeling in San Bernardino, CA
Here are the ranges we quote most often in San Bernardino:
- Cosmetic refresh (paint, fixtures, hardware, no permits): $8,000 – $14,000
- Tub-to-shower or shower surround replacement: $9,000 – $18,000
- Full gut renovation of a standard hall bath: $20,000 – $32,000
- Full gut of a primary bath with layout changes: $30,000 – $42,000
- Bathroom inside a new detached ADU or garage conversion: $18,000 – $35,000 as part of the larger project
What moves the number is almost always what’s behind the walls, not the finishes you pick. Cast-iron replacement, knob-and-tube remediation, and framing repair are the three biggest cost drivers in San Bernardino homes. We write allowances for all three into every contract we sign on pre-1960 properties. If we find less than the allowance, you pay less. Call (833) 863-7015 for a free estimate, and we’ll walk the house with you before we write a single number.
We Also Serve Cities Near San Bernardino
Our bathroom remodeling crews cover San Bernardino and the surrounding area, including Muscoy, Highland, Loma Linda, and Rialto. If you’re just outside city limits, the same inspection-first process applies, and we’ll confirm permit requirements before the estimate. Call (833) 863-7015 to check coverage for your address.
Serving San Bernardino, CA — Our Local Coverage Area
We’re based in the San Bernardino 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 San Bernardino
The extra cost comes from what’s behind the walls, not what’s visible. Opening up a pre-1960 bathroom in San Bernardino frequently exposes cloth-wrapped wiring, cast-iron drain lines with failing joints, and framing that’s been absorbing moisture for decades. A responsible estimate includes allowances for these items up front. Call (833) 863-7015 to see what a properly structured quote looks like for your specific house.
Yes. The city requires GFCI protection on bathroom outlets, a pressure-balancing or thermostatic valve on the shower, and adequate mechanical ventilation once a permit is pulled. If your current bathroom lacks any of these, they become part of the permitted scope. We include them in the estimate so they don’t show up as inspector-mandated changes mid-project. Call (833) 863-7015 and we’ll tell you which upgrades apply to your project.
The alley easement usually doesn’t affect the bathroom itself, but it can affect where plumbing lines run and how the sewer lateral connects. In long, narrow lots with alley access on both sides, the existing lateral may run under the area where the ADU goes. We plot the sewer path before we design the bathroom layout, so the new drain ties in without relocating the lateral. Call (833) 863-7015 for a field assessment.
Re-tiling over a shower wall that has no waterproofing membrane behind it. Many original 1940s mud-set installs in San Bernardino relied on the masonry bed itself to shed water, which works until the grout cracks and the framing starts to rot. We strip everything and rebuild with a modern bonded membrane. If someone quotes you a tile-only fix on an original shower, get a second opinion. Call (833) 863-7015 for ours.
In most cases, yes. We can do a limited bathroom remodel inside a detached ADU or garage conversion without tearing into the rest of the unit, as long as the plumbing and electrical for the bathroom are isolated. If the bathroom shares a wall or drain line with the rest of the structure, the scope may extend. We’ll tell you which applies after inspecting the unit. Call (833) 863-7015 for a free estimate.
Written by Nate Calloway, Owner at Guest House ADU Builders, serving San Bernardino and the Inland Empire.