Bathroom Remodeling in Pomona — Fixed Price, One Bathroom at a Time

Fast, Reliable Bathroom Remodeling Across Pomona

Bathroom remodeling in Pomona typically runs $18,000 – $38,000 for a full gut-and-rebuild of a standard 5×8 hall bath, and most projects take three to six weeks depending on what’s behind the walls. That last part matters more in Pomona than almost anywhere else in the San Gabriel Valley, because this city’s housing stock is old enough that what’s behind the tile is rarely what the homeowner expects. If you live in a 1920s bungalow near Lincoln Park or a 1940s Spanish stucco off Garey Avenue, we know exactly what we’ll find when the walls come open and we write it into the quote before demo day. Call (866) 808-7312 for a free estimate and we’ll walk your specific bathroom with you first.

Call (866) 808-7312

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

We’re not a handyman crew dabbling in baths. Cottage ADU Builders, led by Neil Stratton, specializes in residential square footage work: ADUs, kitchens, and bathrooms. That focus means we’ve done dozens of remodels in Pomona’s pre-1960 housing stock, and we’ve learned which surprises repeat themselves. Two-wire circuits. Lath-and-plaster over undersized studs. Failed shower pans that have been quietly feeding the framing for years. We open walls expecting those, not reacting to them.

Our familiarity with Pomona’s lots and alleys matters too, because many bathroom remodels here tie into a larger plan: a garage conversion ADU behind a bungalow on a deep R-1 parcel. When you’re adding a second bath as part of an Bathroom Remodeling scope that spans both the main house and the new unit, one contractor handling both saves you coordination overhead. A second unit shouldn’t mean a second contractor.

We’re licensed and insured, and every project gets a written line-item quote. No allowances for “whatever we find” left vague. What we expect to find goes into the contract as named line items with real dollar figures. If something truly unexpected shows up, we price it in writing and get your signature before we touch it. That’s the only way to remodel an older Pomona bath honestly.

Our Bathroom Remodeling Services in Pomona

Full Bathroom Gut and Rebuild

This is the bulk of what we do in Pomona, and for good reason. In a 1940s bungalow near Phillips Ranch or a 1950s tract ranch east of the 71, the tile is usually original, the subfloor may be soft, and the plumbing rough-ins are undersized by today’s code. A full rebuild means demo to the studs, reframing what’s compromised, replumbing the wet wall, rewiring to current code, waterproofing, and rebuilding with new fixtures and tile. In Pomona, a full 5×8 bathroom rebuild with mid-range finishes typically runs $22,000 – $32,000. Larger master baths with custom tile work and a walk-in shower run $35,000 – $55,000.

Shower-to-Tub Conversions and Custom Shower Pans

Pomona homes built before 1960 often have one original tub and a separate small bath with a stall shower. The shower pan in those older homes is a common failure point. We tear out the old pan, assess the framing beneath it, install a new waterproof membrane, and flood-test every pan we build before tile goes in. For Pomona homeowners looking to age in place or accommodate family, a tub-to-walk-in-shower conversion typically runs $9,000 – $16,000 including waterproofing, tile, fixtures, and a built-in bench if you want one.

Second Bath Addition for ADU or Garage Conversion

Pomona’s ADU-friendly zoning means a lot of homeowners are adding a bathroom inside a converted detached garage or a new rear-yard unit. That’s a different animal from remodeling an existing bath. The new fixture count often triggers a service review on an undersized 100A panel that’s already carrying a cooling load for Pomona’s 95-100°F summers. We plan for that upfront: panel upgrade scope, new branch circuits, and waste-line runs to the existing sewer lateral. A full ADU bathroom addition in Pomona runs $20,000 – $35,000 as part of a larger project, with the panel and service work itemized separately at $3,500 – $6,500 when triggered.

Moisture Remediation and Re-Waterproofing

Pomona sits in the hot, smoggy eastern San Gabriel Valley, and while it’s dry most of the year, the winter rains plus occasional Santa Ana wind-driven moisture expose weak waterproofing fast. We regularly remodel bathrooms in Spanish stucco homes near downtown where the original mud-bed shower floors were built without modern membranes. Re-tiling over a failed pan without addressing what’s underneath is the most expensive mistake a Pomona homeowner can make. Remediation and membrane replacement before any new finish work runs $4,000 – $9,000 depending on the framing damage found.

Trusted Brands We Service in Pomona

When your bathroom remodel is part of a larger ADU project, the materials conversation matters. We work with the brands you’ve already been researching: Boxabl and Plant Prefab for modular ADU structures, and Tuff Shed for garage-conversion starting points where the existing structure is viable. For exterior finishes on the unit, we install James Hardie fiber-cement siding, which holds up better than vinyl and equals wood’s look without the maintenance. Built to last on the outside, livable on the inside. Your lot, your budget, the right system.

Common Bathroom Remodeling Problems We See in Pomona Homes

• Lath-and-plaster over undersized framing: Almost every pre-1960 bungalow in Pomona has 2×4 studs that were never meant to carry modern tile loads. When we open the wall, those studs often show moisture damage and need sistering before any new substrate goes up.
• Knob-and-tube or two-wire circuits behind the tile: The original bathroom circuits in Pomona’s 1920s-40s homes are ungrounded and inadequate for modern GFCI requirements. Opening the wall for a remodel triggers the code upgrade, and we include that in the quote as a named line item, not a surprise.
• Failed shower pans and rot under the floor: We see failed original pans in Spanish stucco homes near downtown and in 1950s tract houses east of Reservoir Street. The water has often been working on the subfloor for years before anyone notices.
• Undersized 100A panels already carrying ADU cooling loads: Pomona’s summer highs routinely push past 95°F. Add a bathroom with an exhaust fan, heated floor, or the second bath in a garage ADU, and the panel often can’t keep up. We flag this at the estimate stage, not after demo starts.

Pricing for Bathroom Remodeling in Pomona, CA

We Also Serve Cities Near Pomona

Our Pomona service area extends to the neighboring communities where the housing stock and code challenges are similar. We work regularly in La Verne, Claremont, Montclair, and Los Serranos. If you’re in one of those cities and planning a bathroom remodel, the same inspection-first approach applies. From permit to punch-list.

FAQs – Bathroom Remodeling in Pomona

What’s Behind the Tile in a Pomona Bathroom, and Why It Matters

Here’s the honest reality of remodeling a bathroom in Pomona’s older housing stock. On a 1940s bungalow in Lincoln Park, our crew opened a hall bath behind the original tile and found lath-and-plaster wrapped around 2×4 studs chewed back by old moisture, plus a two-wire branch circuit with no ground and a lead-era drain stub. We wrote the sistered framing, a grounded GFCI circuit, a new shower pan with proper waterproofing, and the rough-in inspection as separate approved line items before adding anything back, then closed up and re-tiled after the inspector signed off. The homeowner went in expecting a tile-and-fixture refresh and got a rebuilding of the wet wall. But every dollar of the change order was priced and signed before we touched it. That’s the difference between a Pomona contractor who knows this city’s houses and one who’s quoting from a spreadsheet.

In Pomona’s pre-1960 bungalows and Spanish/Mediterranean stucco homes, the bathroom walls are almost always lath-and-plaster over bare or undersized framing with knob-and-tube or two-wire circuits behind them. Pulling the tile and vanity off for a remodel routinely uncovers framing that has to be sistered and a service upgrade the permit inspection then requires. It’s not a cosmetic swap. It’s a structural and electrical rebuild. And the only way to price it honestly is to look first, then write the contract. That’s what we do, from the first walkthrough to the final inspection.

This is the single biggest reason a remodel quote moves mid-job in Pomona, and it’s the reason some contractors underbid to win the work and then hit you with change orders. We don’t play that game. Our lead on every Pomona bathroom project, from the Phillips Ranch edges to the east-side tract houses, is an inspection that names the likely framing, wiring, and waterproofing work upfront. Then we write it all into the contract. No vague allowances, no “let’s see what we find.” Real numbers, signed before demo day.

Schedule Your Free Bathroom Remodel Estimate in Pomona

If you’re planning a bathroom remodel in Pomona and you want a quote that actually reflects what’s behind your walls, call (866) 808-7312. We’ll walk your bathroom, check what’s visible, explain what’s likely hidden, and write a line-item estimate you can actually plan around. Licensed, insured, and local to the Pomona market. From permit to punch-list, one contractor who knows these old houses.

Written by Neil Stratton, Owner at Cottage ADU Builders, serving Pomona and the eastern San Gabriel Valley.