Fast, Reliable Bathroom Remodeling Across San Bernardino
Bathroom remodeling in San Bernardino typically costs between $18,000 and $45,000 for a full gut renovation, with smaller refreshes starting around $9,000. Most projects in the city’s older homes take two to four weeks once demolition starts, though the permitting and discovery phase can add a week or two. Our team knows exactly what’s behind the walls of a 1950s stucco house off Del Rosa or a 1960s ranch near Cal State. We plan for it from the first walkthrough. Call (877) 658-7475 to schedule your free estimate, and we’ll show you what to expect before we ever pick up a hammer.
Why Casita ADU Builders Is San Bernardino’s Preferred Bathroom Remodeling Company
Nolan Treffert built Casita ADU Builders around a simple observation: the Inland Empire is full of older housing stock, and San Bernardino has more of it than almost anywhere nearby. Homes in ZIP codes 92418, 92423, 92424, and 92427 were mostly built between the 1940s and 1970s. That means cast-iron drains, aluminum wiring, and waterproofing methods that have not aged well. We have remodeled enough bathrooms in these neighborhoods to know what we’ll find before the tile comes off.
Our Bathroom Remodeling team works exclusively on projects tied to the ADU and remodeling world, not as a side line to larger construction contracts. When you bring us in for a bathroom in San Bernardino, you get the same precision we apply to ADU interiors: written allowances for what we expect, written change orders for what we don’t, and a single contract from demo to final inspection. Nolan Treffert personally walks every San Bernardino job before quoting. That’s why homeowners from Muscoy to Loma Linda keep calling us back.
Our Bathroom Remodeling Services in San Bernardino
Full Bathroom Gut Renovations
When a San Bernardino bathroom has outlived its plumbing and framing, a full gut is the honest fix. We demo to the studs, replace drain lines with ABS, upgrade any aluminum wiring we encounter, and rebuild with a waterproofing membrane before tile goes down. This is the service most older San Bernardino homes actually need, not a cosmetic overlay.
Shower and Tub Replacement
Most original showers in San Bernardino’s mid-century homes were built with mud-set pans and vinyl liners that fail slowly and invisibly. By the time you see cracked grout or loose tile, the subfloor is often already damaged. We tear out the old pan, inspect and replace framing as needed, and install a proper membrane system designed for a hot, dry climate before any tile is set.
Permit-Ready Bathroom Upgrades
San Bernardino code enforcement is strict about unpermitted work. If your home has a bathroom that was altered or added without permits sometime in the past fifty years, a remodel is the cleanest way to bring it into compliance. We pull the permit, coordinate inspections with the city, and make sure the finished bathroom passes the same scrutiny as a new build.
Bathroom Plumbing and Drain Replacement
Older homes in the 92418 and 92427 areas often still have original cast-iron waste lines, some of them cracked or corroded beneath the slab. We scope what we can, quote the replacement honestly, and handle trenching or re-routing as part of the remodel rather than as a surprise once your new vanity is ordered.
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 San Bernardino
We keep our work tied to brands that hold up in San Bernardino’s heat. For bathrooms tied to our ADU builds, we trim out interiors alongside Abodu and Cover units. For finish materials on every job, we lean on James Hardie fiber-cement in the shower surround and adjacent trim, because it does not warp or swell when a Santa Ana wind pushes dry 100-degree air through an older home. We also work with Dvele when a homeowner wants a bathroom that coordinates with a modular ADU on the same lot.
Common Bathroom Remodeling Problems We See in San Bernardino Homes
- Undersized cast-iron plumbing. Original 1940s-to-1970s waste lines in San Bernardino homes were often run with 2-inch cast iron for sinks and tubs. When we open a wall, replacing them with properly sized ABS is usually required to pass inspection.
- Unvented or improperly vented fixtures. Many mid-century San Bernardino bathrooms were plumbed before modern venting codes. Lavatories and tubs that drain slowly or gurgle often lack proper vents, and the fix is not optional once the wall is open.
- Termite and dry-rot damage around tub surrounds. The combination of old wood framing, a hot semi-arid climate, and decades of slow leaks has left many San Bernardino bathrooms with structural damage we can’t see until demolition. We write allowances for this before we start.
- Aluminum wiring behind old bathroom walls. Many homes built in the 1960s and early 70s across San Bernardino used aluminum branch circuits. When disturbed during a remodel, these wires can overheat at connection points. We include electrical inspection and correction in every quote for homes of that era.
Pricing for Bathroom Remodeling in San Bernardino, CA
A cosmetic bathroom refresh in San Bernardino, with new tile, vanity, fixtures, and paint, typically runs $9,000 to $18,000. A full gut remodel with plumbing replacement, waterproofing, new tub or shower, and electrical work lands between $22,000 and $45,000. Master baths at the higher end may run $50,000 or more when we’re moving walls or replacing slab-level drains. The single biggest variable in San Bernardino is what’s behind the walls in a home built before 1975. We inspect before we quote, and we put allowances in writing so you’re not surprised. Call (877) 658-7475 for an exact quote on your bathroom, free of charge.
We Also Serve Cities Near San Bernardino
Our Bathroom Remodeling in San Bernardino work regularly takes us into Muscoy, Highland, Loma Linda, and Rialto. Each of those communities has its own mix of housing stock, but they share the same high-desert heat and the same aging plumbing we plan for on every job. If you’re within fifteen minutes of downtown San Bernardino, we can be on your street this week.
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
Expect to find cast-iron drains, unvented plumbing, and possibly aluminum wiring once demolition starts. In San Bernardino’s 1940s-to-1970s neighborhoods, these are not exceptions, they’re the rule. Our process includes a pre-remodel inspection where we scope what we can from access points, then write allowances into your contract for the typical corrections. Any change order is priced and approved in writing before we proceed, so the final cost is never a surprise mid-project. Call (877) 658-7475 to talk through what your specific home likely needs.
Yes. Once you open walls in a San Bernardino bathroom, the city’s building inspectors will require current code compliance for anything they can see: proper drain sizing, venting, waterproofing, and electrical connections. That’s not a penalty, it’s the reason we’re there. We pull the permit, schedule the inspections, and build to code the first time. If we find something that will trigger an upgrade, we tell you before we strip the wall, not after the inspector shows up.
We stop, show you what’s there, and price the fix in writing before we touch it. In San Bernardino’s older homes off streets like Mount Vernon Avenue and Del Rosa, hidden dry rot and mold behind tubs and showers are common enough that we write specific allowances for framing repair, waterproofing replacement, and structural patch work into your original contract. If the damage is beyond the allowance, we take photos, explain the scope, and get your signed approval before proceeding. You will never see a surprise on the final invoice. Call (877) 658-7475 before you sign with anyone else, and ask them what their allowance policy is. Compare.
Yes, for anything beyond cosmetic work like paint and new cabinet hardware. Replacing tile, moving plumbing, altering electrical, or changing the footprint all require a permit in San Bernardino. We handle that process entirely: we pull the permit, coordinate with the city, and get the final sign-off. If a previous owner did unpermitted work on your bathroom, remodeling it legally is often the cleanest way to get your house right with the city. We’re familiar with the process for ZIP codes 92418 through 92427.
San Bernardino’s summer temperatures above 100°F and low humidity change what materials make sense. We recommend ventilation fans rated for continuous operation, moisture barriers that tolerate temperature swings, and grout and caulk formulations that won’t shrink and crack in dry heat. Homes in the 92418 and 92427 areas also benefit from insulation upgrades behind shower walls that face west, where the afternoon sun hits hardest. These are local-practice decisions we make on every job here, not generic advice you’ll find on any remodeling blog.
The Hidden-Issue Reality of San Bernardino Bathroom Remodels
There’s a pattern we see in San Bernardino that you will not see in Redlands or Fontana. The original plumbing in mid-century homes here was often vented through the roof with undersized cast iron, and more than a few bathrooms were expanded or altered at some point without a permit. The result: when we open up a wall to replace a tub or move a vanity, we frequently find drain lines that do not meet current code, and sometimes no venting at all on the lavatory. Opening the wall triggers a full drain-line upgrade. It’s not optional if you want to pass inspection. And if you don’t get a permit, you’re selling a problem to the next owner. We plan for this from the first quote.
We recently remodeled a hall bath in a 1950s stucco home off Mount Vernon Avenue. The original cast-iron drain had corroded badly enough that water was seeping under the slab. When we opened the wall, we found no proper venting for the lavatory. We replaced the drain assembly with ABS and added an AAV, then re-tiled with a waterproofing membrane. The homeowner approved the $2,800 change order in writing before we proceeded. Final inspection passed with no surprises. That’s the job. That’s how it should go.
Nolan Treffert started this company because the ADU world and the remodel world both reward the same habit: planning for what’s behind the wall before you promise a price. In San Bernardino, that habit is the difference between a remodel that feels honest and one that turns into a dispute. We write allowances. We show you the damage. We price it in writing. Then we build it right. Call (877) 658-7475 for a free estimate on your bathroom remodel in San Bernardino, and we’ll walk your home together before we quote a single line item.
Written by Nolan Treffert, Owner at Casita ADU Builders, serving San Bernardino and the surrounding Inland Empire.