Bathroom remodel questions

A powder room runs $12,000 to $22,000. A small hall bathroom with a shower runs $18,000 to $30,000. A full gut of a standard bathroom runs $30,000 to $65,000. A primary suite runs $45,000 to $95,000, and past that where the specification calls for it. The wide bands are honest rather than evasive: two identical-looking rooms can differ by $20,000 depending on whether the layout moves and what is behind the walls.

Because most online calculators are built on national averages and labor is the difference. Across the South Bay and Peninsula, labor commonly absorbs about half a bathroom budget, against roughly a third nationally. Licensed plumbers here often bill $150 to $250 an hour and electricians $120 to $200. Materials cost broadly what they cost anywhere; the people installing them do not.

Whether the plumbing layout changes. Keeping the toilet, shower and basin where they are keeps the project inside its existing rough-in. Moving them in a slab-on-grade house, which is most of Mountain View, means saw-cutting concrete at roughly $1,500 to $4,000 per fixture plus several days of schedule. Finish selections matter, but they rarely swing a budget the way the layout does.

Ten to fifteen percent is the usual advice, and in a pre-1970 house closer to fifteen. The common findings are galvanised supply lines at the end of their life, a subfloor that has been quietly wet under an old shower pan, wiring that predates ground fault protection, and framing that is out of plumb enough to matter once tile goes on. None of it is unusual. All of it costs money that was not in the original number.

The 2025 Cost vs Value report puts a midrange bathroom remodel at recouping about 80 percent of its cost nationally, and Pacific region figures generally sit at the higher end of the national range. For most Mountain View households the resale case is secondary anyway: a dated bathroom is a daily irritation for years, and that is usually what drives the decision.

Rarely well, within a single room. A bathroom is a sequence, demolition, rough plumbing, inspection, waterproofing, tile, fixtures, and stopping halfway means paying for the trades to remobilise later. Across two bathrooms it works the other way: doing both under one permit and one mobilisation usually costs less than two separate projects a year apart.

Three to six weeks of construction for a small bathroom or a shower conversion, eight to twelve for a full gut, ten to sixteen for a primary suite. The part people forget is the front half: design decisions, permit review and material lead times add six to ten weeks before demolition. Custom vanities run six to ten weeks out and imported tile four to six.

Roughly: demolition and site protection, then rough plumbing and electrical, then the rough inspection, then insulation and backer board, then waterproofing with its cure time, then tile and grout with theirs, then fixtures, vanity and glass, then the final inspection and the punch list. The waiting is mostly cure times and inspection scheduling, neither of which can be compressed by working harder.

Almost always, provided there is another working bathroom. If it is the only bathroom, most households arrange to be elsewhere for at least the stretch between demolition and the fixtures going back in. Worth establishing at the walkthrough rather than the week before demolition.

As soon as the design is settled, not when demolition finishes. Lead time is the single most common cause of a stalled bathroom: a crew that has finished tile and is waiting six weeks for a vanity has moved on to another job, and getting them back is a scheduling problem rather than a phone call.

It is a written amendment to the contract covering work that was not in the original scope, with the price agreed before that work goes ahead. Expect one if something turns up behind the wall, or if you change your mind about a finish after the material is ordered. The thing that matters is that it is written and priced before the work happens rather than appearing on the final invoice.

A final inspection closes the permit, and a punch list walkthrough catches the small things: a caulk line, a cabinet door out of alignment, a light switch that ended up in an awkward place. It is normal for there to be a list. It is also normal for a portion of the payment to be tied to that list being cleared.

Yes, for essentially any bathroom remodel. The city Building Division requires a permit before work starts. The one stated exception is replacing a toilet in the same position with a 1.28 gallon per flush model. Anything involving plumbing, electrical, the shower enclosure or opening walls is permitted work.

Fees typically run $800 to $1,100 including inspections. The city indicates roughly five to seven days for a straightforward fixture upgrade in place, and six to eight weeks where structural components such as walls are being altered. Applications and inspection bookings both run through the city development permits portal.

The contractor, as part of standard scope. A permit pulled by the homeowner as an owner-builder shifts responsibility for the work onto the homeowner, which is occasionally appropriate and usually not what someone hiring a remodeler wants.

It surfaces at resale, when the buyer’s inspector finds a bathroom that does not match the permit history. The usual routes are retroactive permitting, which means opening things up so an inspector can see what was done, or a price adjustment at the sale. Neither is fatal. Both are more expensive than permitting it at the time.

The 2025 California Building Standards Code, Title 24, which took effect on 1 January 2026 and applies to permit applications submitted on or after that date. Projects whose complete applications went in before then stay on the 2022 cycle. The parts that touch a bathroom are the Residential Code, the Plumbing Code, the Electrical Code, CalGreen and the Energy Code.

Showerheads are limited to 1.8 gallons per minute, bathroom basin taps to 1.2 gallons per minute and toilets to 1.28 gallons per flush. All three are tighter than the federal standards of 2.5, 2.2 and 1.6 respectively. It is worth knowing before ordering fixtures from an out-of-state supplier, because a compliant-elsewhere showerhead is not compliant here.

Yes. Mechanical exhaust ducted to outside air is required for a bathroom with a tub or shower, and an operable window is not accepted as a substitute. The standard sizing is 50 cubic feet per minute for a fan running on demand, or 20 CFM running continuously.

For a full remodel touching several trades, a Class B general building licence, with the specialty work either self-performed under the relevant licence or subcontracted to someone who holds it. The specialty classes that come up are C-36 plumbing, C-10 electrical, C-54 ceramic and mosaic tile, C-9 drywall and C-33 painting. A single-trade job, tile only for example, needs the specific specialty licence rather than a B.

The Contractors State License Board keeps a public register at cslb.ca.gov, searchable by licence number, business name or personnel name. It shows classification, status, expiry, bond status, workers compensation coverage and complaint history. Licence numbers are numeric and up to eight digits.

Yes. California licensees carry a $25,000 contractor licence bond, raised to that amount on 1 January 2023. Workers compensation is required for any contractor with employees. General liability insurance is not a state licensing requirement, which surprises people, though established remodelers generally carry it as a matter of course.

$1,000 or ten percent of the contract price, whichever is less, excluding finance charges. It is set by Business and Professions Code section 7159.5 and it does not scale with project size, so a $70,000 bathroom still takes a $1,000 deposit. Payments after that track completed work.

Once the aggregate price passes $500. The contract has to include the licence number, an itemised price, a description of the work and materials, the deposit and progress payment terms, start and completion dates, the change order process and a mechanics lien warning. Note that the $500 written-contract threshold is a different number from the $1,000 licensing exemption; the two get conflated often.

Yes. There is a three business day right to cancel a home improvement contract, extended to five business days where the homeowner is 65 or over. Cancellation is in writing, and the contract itself has to carry the notice.

It is a claim an unpaid subcontractor, supplier or laborer can record against your property, and in California it can happen even where you have paid the general contractor in full. Because of that, the warning is mandatory contract language rather than fine print. In practice, unconditional lien releases from subcontractors and suppliers as payments go out is how the exposure is managed.

One to two years on workmanship is the norm in this market, in writing. Manufacturer warranties on fixtures, cabinetry and stone pass through to you directly. The terms worth reading are what is covered, how long it runs and what triggers a callback.

If there is no crawl space access hatch and no basement, and the floor sits close to the outside ground level with no obvious raised perimeter, it is almost certainly slab-on-grade. Most Mountain View housing from the 1950s and 1960s is, and both Eichler tracts are. A plumber can confirm in a few minutes.

Three things. There is no attic, so venting a fan and running lighting need a designed solution rather than a routine one. There is a slab, so drains cannot be rerouted underneath. And the slab usually carries hot water tubing for the radiant heating, which has to be located before any concrete is cut. Projects run $35,000 to $75,000 and the premium is planning, not finish.

In anything built before 1978, asbestos and lead. Asbestos turns up in sheet flooring, the mastic under it and joint compound; lead in paint. Testing runs $300 to $800. If abatement is needed it runs $1,500 to $8,000 and adds one to three weeks. Testing beforehand is a budget line; finding out mid-demolition is a stopped project.

In a pre-1965 house with galvanised steel still in service, it is usually the best-value decision on the whole project. Galvanised pipe corrodes from the inside, restricting flow and eventually failing, and replacing it while the walls are already open costs a fraction of doing it as its own job later. Whether it makes sense depends on what is in the wall, which is a walkthrough question.

The building rules usually matter more than the building code. Expect written approval from the association before starting, restrictions on work hours, coordination for the water shutoff because it affects neighbours, protection through shared corridors and lifts, and rules about where materials and waste can go. All manageable, all worth establishing before a schedule is promised.