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LIVE · Studio ·Vol. I ·California Residential Design-Build ·ADUs · Custom Homes · Multifamily ·License & insurance details on request ·CSLB #1156772 ·Starting $250K ·10–16% ROI ·San Francisco · HQ ·Bay Area ·Los Angeles ·LIVE · Studio ·Vol. I ·California Residential Design-Build ·ADUs · Custom Homes · Multifamily ·License & insurance details on request ·CSLB #1156772 ·Starting $250K ·10–16% ROI ·San Francisco · HQ ·Bay Area ·Los Angeles ·
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Desk 01 · HQ · Bay Area · Bathroom remodel

Bay Area Bathroom Remodeling Contractor. small room, big detail.

Bay Area bathrooms are deceptive: behind the tile sit old cast-iron drains, rotted subfloors, and waterproofing assemblies that were never built right the first time. We rebuild Bay Area baths with proper waterproofing assemblies, upsized drains where needed, and finish detail that holds up.

Licensed California contractor · CSLB #1156772 · Bay Area desk · city-by-city review

Begin a Bay Area bathroom remodeling brief →← Back to Bay Area desk

About Bathroom Remodeling in Bay Area

Most Bay Area bath remodels run $45K–$110K, with primary suite gut work pushing higher.

Bay Area permit notes · Bathroom Remodel

What we resolve before drawings begin.

  • 01

    Cast-iron drain replacement

    Many pre-1960 Bay Area homes still have cast-iron stacks. We replace what's exposed during the remodel — not patch over corrosion.

  • 02

    Subfloor and joist condition

    Tile that fails usually fails because the subfloor flexed or rotted. We expose, inspect, and address before new substrate goes down.

  • 03

    City permits for fixture relocation

    Moving a toilet, shower drain, or vanity triggers city plumbing permits across every Bay city. We pull them so resale stays clean.

Bathroom intel · plumbing brands & waterproofing · Bay Area spec

A bathroom remodel succeeds or fails at two specs: the shower waterproofing system and the brand of mixing valve in the wall. Everything else is finishes.

The manufacturers we actually specify.

  • Schluter Systems

    premium

    Iserlohn, Germany

    KERDI waterproofing membrane · the gold standard

    Sheet-applied bonded waterproofing > liquid-applied for any shower we install. KERDI-LINE drains let you do single-pitch curbless wet rooms.

  • Wedi / Hydro Ban

    premium

    Germany · USA (Laticrete)

    Foam-board waterproof shower substrate · alternative to Schluter

    Wedi board is structurally waterproof — no membrane needed. Faster on commercial-grade tile installs.

  • Kohler

    workhorse

    Kohler, WI · founded 1873

    Toilets, tubs, vanities, faucets · the American default

    Wide dealer network in LA = parts available for 25-year-old fixtures. Class Five flush is still industry standard.

  • Toto

    premium

    Kitakyushu, Japan

    Toilets (Drake, Aquia, Neorest) + Washlet bidet seats

    Tornado-flush + CeFiONtect glaze means actually cleaner bowls. Washlet S550e is the single most-requested upgrade on master baths under $25k.

    1-yr full / 5-yr limited

  • Grohe / Hansgrohe

    premium

    Germany

    Thermostatic shower valves + faucets

    SilkMove cartridge (Grohe) and Hansgrohe AXOR Citterio are the only valve systems we'll spec behind tile we never want to open again.

  • Delta / Brizo

    workhorse

    Indianapolis, IN

    MultiChoice rough-in valves + DIAMOND seal tech

    MultiChoice rough lets you change trim style 10 years later without opening the wall — meaningful in flip and rental work.

  • Moen

    value

    North Olmsted, OH

    Reliable mid-market faucets with lifetime drip-free warranty

    Best value-tier pick when budget is tight; Posi-Temp valve is bulletproof.

  • Duravit

    premium

    Hornberg, Germany

    European sinks, toilets, wall-hung tanks (DuraSystem)

    Wall-hung toilets save 9–12 inches of floor depth — the only way to fit a real toilet in a 36-inch powder room.

  • Geberit

    premium

    Switzerland

    In-wall flush systems for wall-hung toilets

    Geberit Sigma in-wall carrier is the global standard — 25-year flush mechanism warranty.

Material tiers · what you're actually choosing between.

MaterialLifespanInstalled in CABest forTrade-offs
Porcelain large-format tile (24x48, 32x32)Lifetime$22–$45 / sq ft installedModern showers — fewer grout joints, easier to clean.Substrate must be dead-flat (1/8" in 10 ft) or lippage shows hard.
Natural stone (marble, travertine)Lifetime if sealed$28–$60 / sq ft installedClassic high-end masters.Acidic cleaners etch; demand maintenance discipline from owner.
Cement / handmade zelligeLifetime$35–$80 / sq ft installedArtisanal Mediterranean LA aesthetics.Variable thickness — install only with experienced crew.

Specification gotchas we resolve before contract.

  1. 01

    Pre-slope under the pan.

    Even bonded-membrane systems still need a 1/4" per foot slope under the membrane. We pour mud-bed every time — never a flat pan.

  2. 02

    Curbless threshold structural drop.

    A flush wet-room entry requires lowering the floor framing 1–1.5 inches inside the bathroom. We frame this in or recommend a low-profile linear drain when the joists won't take it.

  3. 03

    Exhaust fan CFM ↔ door undercut.

    CA code requires 50 CFM minimum continuous or 100 CFM on demand, and a 3/4-inch door undercut to provide make-up air. Skip the undercut and the fan starves.

Sources · Schluter KERDI system technical data · Toto Washlet product line

Other Bay Area services.

All Bay Area services →

Bay Area city directory · 172 cities served

Bathroom Remodeling, written for your city.

Each link opens a dedicated page calibrated to the city's permit authority, lot conditions, and price band — not a generic regional landing.

Bay Area · Bathroom Remodel FAQ

Questions Bay Area homeowners ask first.

Start a Bay Area bathroom remodel brief. We'll review scope, waterproofing assembly, permit path, and a fixed-scope contract.

  1. What does a Bay Area bathroom remodel cost?
    Most Bay Area bath remodels land $45K–$110K. Primary suite gut renovations can reach $150K+.
  2. How long does a Bay Area bath remodel take?
    5–9 weeks of active construction; 3–5 months brief-to-keys including design and material lead times.
  3. Do I need a permit for a Bay Area bathroom remodel?
    Moving a toilet, shower drain, or vanity triggers a city plumbing permit. Like-for-like fixture swaps usually don't. We pull what's required so resale and insurance stay clean.
  4. Can you build a curbless or zero-threshold shower?
    Yes — full bonded waterproofing (Schluter-Kerdi or equivalent), recessed pan, properly sloped substrate. This is how a curbless shower stays leak-free for 15+ years in a wet Bay Area winter.
  5. Can you remodel a second-floor bath without leaking the first floor?
    Yes — we expose the subfloor, inspect joists, replace the drain, and install full waterproofing before any tile goes down. Most leaks in older Bay homes trace back to cast-iron drain corrosion at the floor flange.
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