Converting a tub to a shower, replacing a dated stall, or building a curbless walk-in for aging in place — a shower install in an older San Francisco home lives or dies on the valve and the waterproofing. Send a few details and you’ll get a straight answer from one vetted, licensed San Francisco plumber — not five companies fighting over your phone number.
Tell us the bathroom and what you want it to become, and you’ll get a clear read on what the job actually takes.
The most common San Francisco shower job is a tub-to-shower conversion — freeing up a cramped bathroom or making it easier to step into. It sounds cosmetic, but the plumbing underneath is the real work. California code now requires a pressure-balancing, anti-scald valve, so an older two-handle setup gets replaced as part of the job. And because these are old homes — and often flats stacked over another unit — the pan and the waterproofing behind the tile have to be done right the first time; a shower leak doesn’t just ruin your floor, it travels into the ceiling below. Getting the drain relocated, the slope correct, and the waterproofing sealed is what separates a shower that lasts from one that fails in a few years.
Fitting the shower to the bathroom
What’s possible depends on the footprint. A tub alcove usually converts cleanly to a walk-in shower; a tight bathroom may call for a compact prefab pan and surround; and a curbless, low-threshold design is the right move for someone planning to age in place. Each choice changes the drain location, the valve, and the waterproofing detail. A plumber walks the space with you, tells you honestly what fits and what it takes behind the wall, and handles the valve, pan, drain, and tie-in so the finished shower is sealed, up to code, and built to last.
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San Francisco shower installation questions
Can I convert my tub to a walk-in shower?
In most San Francisco bathrooms, yes — a tub alcove is a natural fit for a walk-in shower. The work involves relocating or resetting the drain, replacing the valve with a code-required anti-scald type, and waterproofing the new pan and walls. A plumber confirms what your specific layout allows.
Why does the valve have to be replaced?
California code requires a pressure-balancing or thermostatic anti-scald valve, and many older San Francisco showers still have an outdated two-handle valve without that protection. When you redo the shower, bringing the valve up to code is part of doing it right — it prevents sudden temperature swings when water is used elsewhere.
How do you keep a shower from leaking into the unit below?
With a properly built pan, correct slope to the drain, and continuous waterproofing behind the tile before any finish goes on. In a stacked flat that detail is everything, because a hidden shower leak travels straight into the ceiling below — so it’s worth doing carefully, not quickly.
Send your San Francisco shower installation details
Tell us the bathroom and what you want it to become — and you’ll get a clear read on what the install takes, with no pressure to book.
No cost, no obligation — just a clear answer from the one vetted, licensed San Francisco plumber who’d actually do the work.