The Mountain View Bathroom Remodel Guide

A bathroom is the most technically dense room in a house. Water under pressure, water draining by gravity, electricity, ventilation, structure and finish, all inside forty square feet. It is also, for most people, a once-in-a-lifetime purchase made without any of the vocabulary.

This guide is the whole thing in order. It assumes nothing, and every number in it is a Mountain View or Santa Clara County number rather than a national average, because the difference between those two is large enough to wreck a budget.

1. Work out what kind of house you have

Before tile, before budget, before anything: what is under the floor and what is above the ceiling. This determines more of the cost than every finish decision combined.

Mountain View is dominated by postwar construction. Census figures put 15.3 percent of the housing in the 1950s and 17.5 percent in the 1960s, with more than half of the city predating 1980. Almost all of that is slab on grade: a concrete floor poured directly on the ground, with the drain lines cast inside it.

That is the fork in the road. In a house with a crawl space, a plumber reaches the drain from below and moving a toilet a few feet is routine. On a slab, the same move means saw-cutting concrete, trenching, re-running pipe at the right fall and re-pouring, at roughly $1,500 to $4,000 per fixture plus several days of schedule.

Four categories cover most of the city:

• Postwar tract house, 1950s and 1960s. Slab, compact hall bathroom, tub on the wet wall, possibly galvanised supply lines, often no exhaust fan.
• Eichler or mid-century post-and-beam. Slab with radiant heating tubing cast into it, no attic above, exposed beam ceiling. Roughly 250 to 275 Eichlers across the Fairview tract in Monta Loma and Bell Meadows to the south.
• 1970s to 1990s detached and townhouse. Usually slab, more generous bathrooms, fewer material surprises.
• Condominium or attached, 1980s onward. Association rules on approvals, work hours, shutoffs and access often govern the schedule more than the bathroom itself does.

If the house predates 1978, add one more item: test for asbestos and lead before demolition. It costs $300 to $800 and it is the single cheapest way to avoid a stopped project.

2. Decide the scope before the finishes

Almost everyone arrives with a Pinterest board and no scope. It is worth doing the opposite, because scope determines the budget and finishes only decorate it.

The real question is which of these you are doing:

• Refresh. Vanity, floor, paint, light, fan, fixtures. Layout untouched, shower untouched. Cheapest and fastest, and the right answer more often than the industry admits.
• Shower conversion. The tub or old enclosure comes out, the framing gets corrected, new waterproofing goes in, tile and glass follow. The most common single scope in Mountain View.
• Full remodel, layout kept. Everything replaced, fixtures stay where the existing rough-in puts them. Avoids concrete work entirely.
• Full remodel, layout changed. Same as above plus relocating fixtures. On a slab this is where the money goes.
• Primary suite. Separate shower and tub, double vanity, sometimes an enclosed toilet. Larger and more design-dependent.

The honest test for whether a layout change is worth it: name the specific thing the current plan makes difficult. "The door hits the vanity", "there is nowhere to stand to dry off", "the only place to put a towel is behind the door". Those are worth cutting concrete for. "It feels dated" is not; that is a finish problem and it is far cheaper to solve.

3. What it costs in Mountain View

Bay Area pricing is not a rumour. Labor typically absorbs about half a bathroom budget here, against roughly a third nationally, and licensed plumbers commonly bill $150 to $250 an hour with electricians at $120 to $200. This is why national calculators come in badly low.

Add-ons sit on top of the base: a curbless entry at $3,000 to $6,000, a freestanding tub at $4,000 to $12,000, a frameless glass enclosure at $3,500 to $9,000, electric floor heating at $1,500 to $3,500, and an accessibility package at $2,000 to $8,000.

Then a contingency. Ten to fifteen percent, and closer to fifteen in a pre-1970 house. The cost calculator puts the whole thing together, and the cost guide breaks it down line by line.

4. How long it really takes

Construction is three to six weeks for a small bathroom or shower conversion, eight to twelve for a full gut, ten to sixteen for a primary suite.

The part nobody counts is the front half. Settling the layout, making the selections and waiting on material lead times commonly add six to ten weeks before demolition. Custom vanities run six to ten weeks out and imported tile four to six. A project decided in March is realistically finished in the autumn, and the single biggest thing you can do about that is order long-lead items the week the design settles rather than the week demolition ends.

5. The contract and the California rules

California is stricter than most states, and several rules surprise people:

• Deposit capped at $1,000 or ten percent, whichever is less. It does not scale with project size. A $70,000 bathroom still takes a $1,000 deposit.
• Written contract required above $500, with mandated content.
• Three business days to cancel, five if the homeowner is 65 or over.
• Mechanics liens can attach even where you have paid the contractor in full, which is why unconditional lien releases matter as payments go out.

The whole picture is in the contract rules note.

6. What happens during the build

The sequence is fixed, and most of the calendar is waiting rather than working:

1. Protection and demolition. Floor protection through the house, the room stripped, debris out.
2. Rough plumbing and electrical. Supply and drain, circuits, fan and duct, blocking behind future grab bars.
3. Substrate. Backer board or foam board, walls made flat and plumb. Once this goes on, everything behind it is settled.
4. Waterproofing and flood test. Membrane installed to one system, pan filled and left overnight.
5. Tile and grout. With cure time between the two, which cannot be rushed.
6. Fixtures, vanity, glass. Glass is measured after tile and takes another week or two to fabricate.
7. Punch list and handover. A walkthrough, a list of small items, and those items cleared.

Two of those steps are where quality lives. The rough-in, because it is the last easy moment to change where anything goes. And the waterproofing, because it is invisible from the day it is covered and decisive fifteen years later. That layer is worth understanding: see how a shower is waterproofed.

7. The expensive mistakes

• Ordering materials late. The commonest cause of a stalled bathroom. A crew waiting six weeks for a vanity has gone to another job.
• Moving fixtures for aesthetic reasons on a slab. Thousands of dollars and days of schedule for a change nobody will be able to name in a year.
• Skipping the exhaust fan or venting it into a cavity. Warm wet air pushed into a roof space or a wall destroys structure slowly and invisibly, and a fan is the cheapest thing on this list.
• Mixing waterproofing systems. Components from three manufacturers are not tested together and no warranty covers the result.
• Skipping blocking. Timber behind the wall for grab bars costs almost nothing while the walls are open and is a demolition job later.
• No contingency. Something is behind the wall. There always is.
• Choosing finishes before the layout is settled. Every selection made against a plan that then changes gets made twice, and the second time is under pressure.

Where to go next

If you want numbers, the cost guide and the calculator. If you have an Eichler or another post-and-beam house, the Eichler guide is the one that matters. If the room is small, the layout guide. And if you are ready to have it priced, the service pages cover each scope.