Cost guide · Updated 2026-04-01

Bathroom remodel cost in California, 2026 edition.

Bathroom remodels run $295–$615/sqft in LA and $375–$795/sqft in the Bay. Tile labor and pre-1970 supply lines drive most of the surprise.

Installed cost bands

$/sqft of finished area for this scope — LA versus Bay Area, side by side.

Scope	Los Angeles	Bay Area
Bath remodel	$295–$615 Tile work and tub-to-shower conversions are the swing items.	$375–$795 Plumbing in older homes routinely requires re-piping.

1.
Tub-to-shower conversion
Pulling a tub, re-framing for a curb, waterproofing the pan, and tiling adds 6–10 days of skilled labor and $9–22K depending on size and tile selection.
2.
Plumbing condition
Pre-1970 galvanized supply and cast-iron waste lines almost always need to come out during a remodel. Budget $4–9K for the re-pipe per bathroom.
3.
Waterproofing standard
Membrane systems (Schluter Kerdi / Wedi) cost more upfront than felt-and-wire-lath but eliminate the failure mode that takes out the ceiling below within 8 years.
4.
Tile + slab selection
Porcelain field tile vs. natural stone vs. large-format slab is a 4× spread on the material side, plus labor doubles for slabs and Schluter-detailed tile.
5.
Ventilation + code
California's 2022 cycle requires ENERGY STAR exhaust fans ducted to outside; the 2025 cycle tightens minimum CFM and adds humidity sensors in interior baths.

The hard-cost bands above exclude these. Forgetting them is the most common reason a budget runs 20% over.

Line item	% of hard cost
Design + engineering (architectural, structural, Title 24) Higher end for hillside, custom, or historic-overlay parcels.	6–12%
Permits + plan check (LADBS / SF DBI / etc.) Add school fees ($4–6/sqft for ADUs > 750 sqft).	2–5%
Utility upgrades (panel, sewer lateral, water meter) Pre-1980 homes routinely hit the top of this range.	3–8%
Survey + soils report Required on hillside and parcels with fault-zone proximity.	0.5–2%
Owner contingency Skip this and the next discovery becomes a change-order argument.	8–15%

Includes payroll burden + small-tool allocation. Excludes overhead & profit.

Includes payroll burden + small-tool allocation. Excludes overhead & profit.

1.
California Plumbing Code (Title 24 Part 5) governs all bathroom remodel rough-ins.
California Building Standards Commission · view source
2.
Schluter Systems publishes the IAPMO-listed membrane assemblies most California cities accept without further review.
Schluter Systems · view source
3.
U.S. EPA WaterSense fixtures are required for any new toilet in California under Title 20 appliance efficiency standards.
U.S. Environmental Protection Agency · view source
4.
CSLB requires a 10% (max) down payment on home-improvement contracts.
California Contractors State License Board · view source

Ready to scope it?

See our Bathroom Remodeling pillar

Process, materials, code walkthroughs, and case studies for this scope — built from the same job tracking as the numbers above.