How to plan a bathroom remodel, from the first question to the first day of demolition

What problem is the bathroom actually causing?

Write down the complaint before the wish list. A bathroom gets remodeled because something fails or something no longer fits: the shower leaks or grows mold, the tub is hard to step over, two people cannot use the sink at once, the fan does nothing, or the finishes are simply worn. Each complaint points to a different scope, and the wish list tends to inflate every scope equally. Houzz's 2025 Bathroom Trends Study reports that 68% of renovators considered special needs when planning and 31% designed for a current household need, which shows how often the real driver is use rather than looks.

Rank the complaints. If the first item is water damage, the shower assembly is the project and everything else is optional. If the first item is access, the layout and clearances are the project. If it is appearance and the shower is sound, a refresh may be all the room needs, and the refresh versus full renovation comparison walks through that test. The ranking also tells you what to protect when the budget tightens later.

What should you inspect before choosing a scope?

Four things decide the scope more than any preference. First, the shower: press on the tile at the bottom courses and around the valve; soft spots, cracked grout lines that keep reopening, and a musty smell at the drain mean the substrate or pan is wet. Second, the fan: hold a tissue to the grille with the door closed; if it does not stick, and if the duct goes into the attic rather than outdoors, that is a code correction waiting to happen. Third, the floor: bounce near the toilet and tub; movement suggests a subfloor repair.

Fourth, the plumbing you cannot see. Note the age of the house, whether the bathroom sits on a slab or a framed floor, where the drain lines run, and whether the supply is copper, galvanized steel or PEX. Galvanized supply lines in a 1950s house often get replaced during a remodel because the walls are open anyway; a slab foundation makes any drain move a saw-cutting job.

• Shower: soft tile, recurring grout cracks, staining on the ceiling below
• Fan: airflow at the grille, duct termination, humidity control
• Floor: bounce, stains at the toilet flange, tile cracking in a line
• Plumbing: supply material, drain routing, slab versus framed floor
• Electrical: GFCI protection, a dedicated circuit if you plan a heated floor

Which scope matches, and what does each one open up?

There are four scopes worth naming. A fixture and finish refresh replaces the vanity, toilet, faucet, lighting, floor and paint while the shower stays closed. A walk-in shower installation or a tub-to-shower conversion opens the wet walls and the shower floor and rebuilds that assembly, leaving the rest of the room largely intact. A complete renovation opens everything, including floors and often the ceiling, and may relocate fixtures. An accessible remodel is any of those with clearances, supports and entry designed around a specific person.

The scope sets the cost band before any selection does. HomeGuide puts a bathroom remodel at $100 to $500 per square foot, a five-to-one range that is mostly about how much gets opened. The scope also sets the permit path, the number of trades and the number of inspections. Choose the smallest scope that fixes the ranked complaint, then decide whether the marginal cost of the next scope up is worth it while the walls are open, which is a real consideration for a shower rebuild that leaves a failing fan untouched.

How does the household's routine change the plan?

A bathroom remodel removes a bathroom from service for weeks. This Old House reports that 2 in 3 remodels finish in one to four weeks, and our analysis of the EIA's 2024 household survey finds 38.6% of occupied U.S. homes have exactly one full bathroom, rising to 36.6% of owner-occupied homes built before 1990 against 7.0% of newer ones, a 29.7 points gap. If yours is one of them, the routine is a design input: where the household showers, whether the toilet can be reinstalled nightly during rough-in, and whether the work should be phased so the room is never fully down.

Ask the pro to build the schedule around it. Common approaches include keeping the old toilet on a temporary wax ring until the floor tile goes in, scheduling demolition on a Monday so the flood test and rough inspection land midweek, and ordering the glass template the day after tile so the enclosure lead time does not add a week at the end. A gym membership or a relative's shower for three weeks is cheaper than a second bathroom, but the plan should say which it is.

Which selections have to be made before demolition, and why?

Selections with rough-in consequences come first. The shower valve determines the wall opening and the mixing type; the drain choice, point or linear, determines the slope and the base; a wall-hung toilet needs an in-wall carrier before drywall; a heated floor needs a dedicated circuit and a thermostat box; a niche needs to land between studs and avoid the valve. The vanity width and sink count fix the supply and drain positions. Change any of these after rough-in and you pay twice.

Selections with lead-time consequences come next. Custom and semi-custom vanities, which Houzz reports 55% of renovators chose, can take four to ten weeks. Frameless glass is measured after tile and takes one to three weeks to arrive, which is the single most common reason a shower is finished but unusable. Specialty tile, freestanding tubs and imported fixtures have their own lead times. The rule is simple: nothing is demolished until every rough-in item is on site and every lead-time item has a confirmed date.

When do design help and a permit enter the sequence?

Design help earns its fee when the layout changes or the user has specific needs. Houzz's 2025 study found 84% of bathroom renovators hired a professional, and 45% used a general contractor. For a same-layout rebuild, a good remodeler's layout sketch is usually enough. For a fixture move, a door widening or an accessible remodel, a designer or an occupational therapist should confirm dimensions before the proposal is written, not after the framing is done.

The permit belongs between design and construction. Most jurisdictions require a permit whenever plumbing or electrical is altered, which includes almost every shower rebuild and every drain move; the permits guide covers the triggers and inspections. Build permit review time into the schedule, typically a few days to a few weeks depending on the city, and confirm in writing who pulls it. A proposal that is silent on permits is either assuming you will handle it or assuming nobody will.

How should the schedule be built so it survives demolition?

A realistic same-layout shower rebuild runs about two to three weeks of site work plus glass. Demolition and rough plumbing and electrical take two to four days; the rough inspection follows; backer board, membrane and the flood test take two to three days including the 24-hour hold; tile and grout take three to five days; then the vanity, toilet, fixtures, paint and trim take two to three days. A full renovation with a drain move adds a week for the floor and a second inspection.

Build the contingency into the schedule as well as the budget. Discovered damage under a tub or behind a shower is common enough that the plan should include a one-to-three-day repair window and a pre-agreed unit price for subfloor and framing repair. Angi's 2025 Home Spending Pulse found 71% of homeowners who hired a pro postponed at least one project that year and 29% bundled repairs into one job, which is a reminder that the schedule should also fit your finances, not just the contractor's calendar.

What goes into the brief you send for estimates?

The brief is the planning document in one page. It names the scope, the fixtures that stay and go, the shower assembly you expect (base type, membrane system, drain, entry, enclosure), the fan and its duct route, any accessibility dimensions, the selections you have made and the allowances you want for those you have not, the budget range with its contingency, and the permit path. It also states the household constraint: one bathroom or two, and any hard dates.

Send the same brief to every pro so the proposals can be laid side by side. Ask each to state their assumptions about existing conditions and their procedure for hidden damage, and to break out labor and materials so you can see where the numbers differ. The estimate request page lists what to include, and the calculator gives you the range to check each proposal against.