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

Fast, Reliable Bathroom Remodeling Across Pomona

A full bathroom remodel in Pomona typically runs $18,000 – $38,000, and the single biggest cost driver most homeowners never see coming is the condition of the slab under the old floor. We’re Foundry ADU Builders, and we work throughout Pomona’s 91766, 91768, 91769, and 91797 ZIP codes on bathrooms that range from small hall baths in 1940s stucco tracts to full ADU bath builds on alley-facing garage conversions. If you’re planning a remodel, call (866) 251-7857 for a free estimate before you start tearing anything out. The slab condition changes the whole job, and we’ll tell you upfront what your house actually needs.

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

Most Pomona homes we walk through share the same DNA: single-story stucco or Spanish-revival construction poured from the 1920s through the 1970s, with generous lots and, very often, a detached or alley-facing garage. That housing stock means something specific for bathrooms. The original slab under the floor was poured without a vapor barrier. Tile and subfloor framing sit against damp concrete for decades, and when you finally pull up that pink 1950s tile, you find what’s underneath. Our Bathroom Remodeling team has cut out enough old Pomona slabs to know exactly what we’ll find, and we price for it from day one rather than surprising you with a change order after demo.

Foundry ADU Builders is led by Rob Cafferty, and we’ve built our entire business around ADU construction and interior completion. That matters for Pomona specifically because so many of the bathrooms we build here live inside ADUs: garage conversions, rear-detached units, and additions. We handle the shell and the bath as one contractor, so the plumbing, vapor barrier, and waterproofing are all sequenced correctly from the start. When a bathroom is added to a detached unit on an alley, the wall assembly and floor details have to be planned together. A general remodeler who only does interior work misses the exterior conditions that cause failures six months later.

Pomona customers call us because we show up on time, we explain the trade-offs without pushing a single brand or method, and we write line-item quotes so you can see exactly what the slab work, waterproofing, and fixtures cost. We don’t pad the estimate with vague allowances and we don’t use cheap builder-grade fittings on a unit that will sit through an inland summer and a winter frost. Our reputation in Pomona is built on that honesty.

Our Bathroom Remodeling Services in Pomona

Full Bathroom Remodel with Slab and Vapor-Barrier Correction

The classic Pomona bath job starts with the floor. We demo down to the existing concrete slab, assess whether it’s cracked or spalling, and in most pre-1980 homes we recommend cutting out the old pour and re-pouring over a proper vapor barrier. This is not an upgrade for looks. A missing vapor barrier keeps the subfloor and grout chronically damp, which is why so many Pomona bathrooms grow mold under the tile and crack grout within five years. We set the barrier, re-pour, then build the finish floor on a dry, stable base.

Moisture-Resistant Backer Board and Sealed Tile Bases

In a Pomona detached ADU bathroom, standard drywall and green board fail faster than inland buyers expect. Heat-and-frost swings create condensation cycles, and the old units on shallow garage slabs wick ground moisture constantly. We specify cement backer board behind tile and tub surrounds, not gypsum-based board, and we tape and seal every seam with a paintable waterproof membrane. The tile base at the floor-wall junction gets a sealed, flexible joint so winter-driven moisture at the alley-side door can’t creep under the finish.

Frost-Protected Plumbing and Stainless Hardware for Detached ADU Baths

Pomona nights get cold enough to freeze an exposed supply line, especially in a detached unit where the plumbing runs along an uninsulated alley wall. We slope and insulate supply lines properly, set them before any slab pour, and where frost risk is real we route lines into the conditioned envelope or add heat-taped protection at vulnerable runs. Hardware matters too: cheap galvanized fasteners and builder-grade fittings corrode fast in inland heat-and-frost swings. We specify stainless fasteners and quality brass or stainless plumbing fittings throughout Pomona ADU baths.

Bathroom Builds Inside Garage-to-ADU Conversions

Pomona’s alley-facing garages are the most common ADU starting point in the city, and the bathroom inside that conversion is where structural shortcuts show up first. The old garage slab is usually a shallow, cracked pour with no vapor barrier and no plumbing roughed in. We cut out the slab section, set frost-protected supply lines and a proper drain, insulate, re-pour over a vapor barrier, and then build the bath as a fully conditioned space. We’ve done this exact job on conversions near Lincoln Avenue, Holt Avenue, and the Phillips Ranch neighborhood, and the sequencing is always the same: the slab and the plumbing come before any tile or cabinet goes in.

Trusted Brands We Service in Pomona

We’re brand-agnostic by design, because the right material depends on the unit and the exposure. For Pomona’s inland heat-and-frost conditions, we commonly use James Hardie fiber cement backer and exterior products on ADU shell work that ties into the bath, and for full modular ADU projects we work with Plant Prefab, Abodu, and Tuff Shed conversions where the bath is built inside a delivered shell. We stock and source local parts in Pomona so a fixture or fitting that needs replacing mid-job doesn’t sit on a truck somewhere in Riverside. If the Job needs a specific brand, we’ll tell you where the trade-offs are.

Common Bathroom Remodeling Problems We See in Pomona Homes

• No vapor barrier under the old slab. The floor slab in a pre-1980 Pomona stucco home was often poured directly on grade. Tile and framing sit against damp concrete indefinitely, which means grout fails, backer board softens, and mold grows behind the baseboard. We fix this with a slab cut-out and re-pour over a proper barrier before the new floor goes in.
• Cheap galvanized fasteners and fittings corroding in heat-and-frost swings. Detached ADU bathrooms and powder rooms on converted garages see bigger temperature swings than the main house. Galvanized hardware rusts and seizes, and cheap builder fittings fail at the threaded joints. We specify stainless or marine-grade hardware and quality brass fittings throughout.
• Frost-exposed supply lines on alley-facing walls. A Pomona cold snap is no joke, and a supply line running along an uninsulated alley wall in a detached unit will freeze and burst. We insulate, route lines inside the conditioned envelope where possible, and use frost-protected detailing at every vulnerable run.
• Skipping the shallow-garage-slab re-pour. If the garage slab is thin, cracked, and unbarriered, building a bath on top of it means a raised floor with a hard-to-seal transition at the door and ongoing moisture beneath the finish. We cut out and re-pour the section properly, so the bath floor sits at the right elevation with a clean, sealed threshold.

Pricing for Bathroom Remodeling in Pomona, CA

We Also Serve Cities Near Pomona

From our base in Brea, we cover Pomona and the surrounding communities: La Verne, Claremont, Montclair, and Los Serranos. If you’re just over the city line, we’ll still come out with the same upfront slab assessment and material guidance. For the full scope of our work in this area, see Bathroom Remodeling in Pomona or call us directly.

FAQs – Bathroom Remodeling in Pomona