Bathroom Remodeling in Pomona — One Written Price, No Change Orders

Fast, Reliable Bathroom Remodeling Across Pomona

Bathroom remodeling in Pomona typically runs $18,000 – $42,000 for a full gut-and-replace, and $9,000 – $18,000 for a garage-conversion ADU bathroom with new plumbing and finish work. Most Pomona jobs take two to five weeks depending on whether we’re dealing with an existing home bath or converting an older detached garage. At Casita ADU Builders, we know Pomona’s specific housing stock well: deep, narrow lots, 1920s Craftsman bungalows, 1950s tract homes, and more unpermitted garage conversions than almost anywhere else in the eastern San Gabriel Valley. When you call (877) 658-7475, you reach a team that works in Pomona weekly and understands what’s behind the walls before we open them.

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Why Casita ADU Builders Is Pomona’s Preferred Bathroom Remodeling Company

We’re an ADU specialist first, and that changes how we handle bathroom remodels in Pomona. Most general contractors treat a bathroom as a standalone job. We approach it as part of a larger picture, whether that’s finishing a converted garage into a legal ADU, modernizing a 1920s home near downtown, or correcting work that was never permitted in the first place.

Our lead on Pomona’s market comes from actual job sites, not drive-by estimates. We spent time on a deep, narrow lot off West Mission Boulevard near downtown Pomona, converting a 1920s detached garage into a bathroom for an ADU. The original garage had unpermitted electrical and a shallow footing. So we first legalized the prior work with the City of Pomona before installing a new shower and toilet that tied into the main house’s sewer line through a party-wall easement. We kept the neighbor informed with a 48-hour notice and staged materials in the driveway to avoid blocking the alley. That’s the kind of job that separates a Pomona-capable contractor from a generic one.

Nolan Treffert leads our team, and the ADU-only focus means every subcontractor we bring to a Pomona bathroom knows the city’s permit office, inspection rhythm, and the permit history quirks of these older neighborhoods. When you call for a free estimate at (877) 658-7475, you’ll talk to someone who has actually dealt with Pomona’s building department on garage conversions and bathroom remodels, not someone reading from a script.

Our Bathroom Remodeling Services in Pomona

Garage Conversion Bathroom Remodeling

Pomona’s ADU market is defined by its huge stock of pre-war and mid-century detached garages and underused rear yards on large lots, combined with one of LA County’s most active ADU-conversion cultures for multigenerational households. Often that means Spanish-speaking families adding units for parents or adult children. Unlike newer inland cities where ADUs mean new construction in a fresh subdivision, in Pomona the work is predominantly converting aging detached garages and carving space from long-established backyard lots in older, character-rich neighborhoods. Those garages frequently lack sewer connections, proper venting, and any real insulation. We handle the full bathroom build-out inside those conversions, from trenching new drain lines to finishing with tile, fixtures, and ventilation rated for Pomona’s summer heat.

Permit Resolution for Unpermitted Prior Work

This is the reality of Pomona’s garage-conversion grey area. Decades of informal, unpermitted garage and room conversions mean ADU contractors here routinely find prior unpermitted electrical, plumbing or structural work on the very structures they’re hired to convert. We must navigate City of Pomona permitting to legalize or correct it before the ADU can pass final inspection. Our team handles that process from the first discovery through final sign-off. We document what exists, bring it to code where required, and work with Pomona inspectors to get the record cleared. It adds days or weeks to a project, but skipping it means the bathroom can never be legal.

Party-Wall and Neighbor Coordination

Pomona’s deep, narrow lots with detached rear garages often force bathroom remodels in converted ADUs to route all plumbing through a single shared wall with the main house. That means a party-wall easement in some cases, and a notice to the neighbor whose property line runs close. We handle that paperwork and communication. Our crew gives written 48-hour notice before work starts, keeps the site tight, and stages in the driveway instead of the alley. In dense older Pomona neighborhoods like the streets off Garey Avenue and Holt Boulevard, this is what keeps a six-figure remodel from turning into a stop-work order.

Full Finish-Out for ADU Bathrooms

Once the shell is legal and the drains are run, we complete the interior exactly like our Bathroom Remodeling team does on any full home project. That means flooring, shower pans and enclosures, vanities, toilets, lighting, exhaust fans, and waterproofing. We coordinate it all under the same contract as the ADU build so there’s no handoff to a second contractor mid-project. For Pomona homeowners adding an ADU at the back of a 91768 or 91766 lot, that single-contract flow matters. One team manages the schedule from rough plumbing to final grout.

Trusted Brands We Service in Pomona

We work across all the leading prefab brands so you choose the right ADU, not just the one we happen to sell. In Pomona, that often means pairing a Tuff Shed conversion with an in-house bathroom we finish ourselves, or completing the interior of an Abodu or Cover unit that arrives with a rough bath space ready for our tile and fixture work. We use James Hardie fiber-cement products on exterior applications because Pomona’s inland heat and occasional Santa Ana wind events demand a finish built to weather decades and still look the part. On the interior, our remodel crews stock common parts locally so we’re not waiting a week on a shower valve when a Pomona homeowner is waiting to occupy the unit. From prefab delivery to finished kitchen and bath, one team, one contract, no handoffs. That philosophy applies whether the project is a full ADU or a standalone bathroom remodel in a Craftsman home near the Pomona Fox Theater.

Common Bathroom Remodeling Problems We See in Pomona Homes

• Unpermitted prior work that stops the project. We routinely open a garage-conversion bathroom in Pomona and find electrical or plumbing that was never permitted. The City of Pomona requires that work be legalized or corrected before final inspection. We manage that resolution as part of the remodel scope, which protects the homeowner from a failed inspection and a bathroom that can’t legally be rented or counted as living space.
• Single-wythe walls and moisture problems in converted garages. Many Pomona detached garages were built with single-wythe masonry or uninsulated wood framing. Add a shower and you add moisture, and Pomona’s 95-100°F summers make the problem worse in an unconditioned space. We spec ventilation and waterproofing that exceeds code minimum for these conversions, because the standard solution fails in converted garages.
• Party-wall notice and noise complaints in dense older neighborhoods. The streets running off West Mission Boulevard, Garey Avenue, and Holt Boulevard are dense, with homes close to property lines. Adjoining neighbors have legal rights, and Pomona enforces work-hour ordinances. We handle the notice, keep the noise within legal hours, and communicate with the neighbor before the jackhammer shows up.
• Shallow footings under old garage structures. A 1920s garage on a Pomona lot often sits on a footing that was never engineered for a bathroom’s weight. New shower pans and tile add load. Where needed, we reinforce the slab before plumbing and finish work go in, which keeps the structure from settling and cracking the new tile a year later.

Pricing for Bathroom Remodeling in Pomona, CA

We Also Serve Cities Near Pomona

Our crews work the full eastern San Gabriel Valley corridor. Along with our work across Bathroom Remodeling in Pomona, we handle ADU and bathroom projects in La Verne, Claremont, Montclair, and Los Serranos. If your property sits in a Pomona ZIP like 91768, 91769, 91797, or 91766, or just over the line in one of those nearby cities, the same team covers it. Call (877) 658-7475 and we’ll confirm coverage for your specific street.

FAQs – Bathroom Remodeling in Pomona