Bathroom — the smallest room with the highest stakes.

Every guide we have ever written for the bathroom, organized by what you came here to do. 163 bathroom projects across repair, install, build, clean, organize, and decorate. The bathroom is the room where the phrase "it seemed fine" costs the most money — a slow leak behind the shower tile, a toilet flange installed over a crack, a fan vented into the attic rather than outside. This hub exists so you can do it right the first time, or fix it correctly the second time, without guessing.

Bathroom is one of ten room hubs on HowTo: Home Edition. It is the smallest room in most homes and the one with the most concentrated plumbing, electrical, and waterproofing requirements per square foot. Every outlet within six feet of a water source must be GFCI-protected. Every tile surface is a potential water intrusion point. Every caulk joint is a maintenance item that will need to be refreshed every three to five years. The stakes are real — get them right and the bathroom runs quietly for decades. Miss one step and you are looking at mold remediation, subfloor replacement, or a ceiling repair in the room below.

How to use this hub

Pick a verb at the top — what are you trying to do? The hub narrows to the relevant slice of 163 guides. If you do not know what you need yet, scroll down for the five most-searched bathroom projects, the six mistakes that fill our reader inbox, and a zone-by-zone breakdown of the room that will route you to the right guide for the specific part of the bathroom that is giving you trouble right now.

If you know you need to install something, start at Bathroom Install. If something is broken or leaking, start at Bathroom Repair. If you are doing your semi-annual deep clean and the grout is what's motivating you, Bathroom Clean is exactly what it sounds like. Every guide is organized so you can open it, read it, and actually do the thing — no filler, no affiliate padding, just the steps that matter.

Bathroom by task lane — six paths into the bathroom

Repair the bathroom — 49 guides

The dripping showerhead. The running toilet. The tub caulk that has gone black and is starting to separate from the tile. The grout that is crumbling at the base of the shower. Bathroom repair is the lane where water wins if you procrastinate — every bathroom leak that is not addressed promptly becomes a larger structural problem. The 49 repair guides cover the full spectrum from a ten-minute handle replacement to a re-caulking job that takes two hours and a full day of cure time. If the problem involves water coming from somewhere it should not be, this is your lane. Browse all bathroom repair guides →

Install in the bathroom — 51 guides

Toilets, showerheads, vanity lights, exhaust fans, tile shower walls, mirrors, towel warmers, GFCI outlets, faucets, and thirty-eight more bathroom installations. Install is the bathroom's largest task lane and its highest-ROI one — a new showerhead costs forty dollars and takes twenty minutes, and the one it replaces has been there since 2003. Installing a toilet yourself saves a two-hundred-dollar service call and takes two hours. The 51 install guides cover everything from the fastest swaps (twenty-minute showerhead, sixty-minute faucet) to the weekend-scale projects (tile shower wall, new exhaust fan with ductwork). Browse all bathroom install guides →

Build for the bathroom — 9 guides

The bathroom is a tight room and the build projects reflect that precision — a floating vanity, a teak shower bench, the built-in tile niche that replaced the corner caddy, a framed mirror that makes the whole vanity look like it was designed. Build is the smallest bathroom lane because the room does not have the floor area for large built furniture, but the nine guides in this lane are among the highest-impact projects on the site. A well-framed mirror or a properly built shower niche transforms the feel of the room for the cost of materials and an afternoon. Browse all bathroom build guides →

Clean the bathroom — 28 guides

Grout that has gone gray over years of soap film. Hard-water deposits around the faucet base. Soap scum on the shower glass that your squeegee stopped touching a year ago. The exhaust fan grille that has accumulated enough dust to be a fire hazard. Mildew at the base of the toilet behind the tank. Bathroom clean is the maintenance lane — these are the projects that do not announce themselves with an emergency, they just slowly make the room worse until one day you cannot look at the floor grout without feeling bad about it. The 28 clean guides are specific about what products work on which surfaces and why. Browse all bathroom cleaning guides →

Organize the bathroom — 15 guides

Under the sink where the drain-cleaner bottles and extra shampoo and that collection of hotel soaps live in a category-free pile. The medicine cabinet where nothing stands upright. The towel situation that has devolved into a pile on the vanity. The counter that accumulates products because there is nowhere else to put them. Bathroom organize is the lane where a thirty-dollar set of pull-out bins and ninety minutes of time reclaims the usable square footage that the room actually has. Browse all bathroom organize guides →

Decorate the bathroom — 11 guides

Paint colors that survive steam and humidity without peeling at the ceiling. Hardware finishes that make a builder-grade vanity look intentional. Mirror upgrades that double the perceived size of a small room. Lighting that shifts the room from a fluorescent rectangle to something a person wants to spend time in. Decorate is the bathroom lane for the cosmetic decisions that have outsized visual impact because the room is small — in a fifty-square-foot room, a new mirror and a changed hardware finish is visible everywhere you look at once. Browse all bathroom decorate guides →

The five most-searched bathroom guides

Across all six task lanes, these are the bathroom projects readers arrive for most often. If you are not sure where to start in your bathroom, start here.

• How to tile a shower wall. The most structurally demanding bathroom install most homeowners will ever do. Two weekends, $400–800 in materials, advanced skill level. The guide covers waterproofing membrane, cement board installation, layout, thinset, setting, and grouting — in the right sequence, which is the part most first-timers get wrong.
• How to install a toilet. The editor's pick for Spring 2026 and one of the most satisfying bathroom installs a homeowner can do. Two hours, $150–500 depending on the toilet, intermediate skill level. New wax ring, correct bolt torque, supply line connection — steps that become intuitive after the first time.
• How to install a showerhead. The fastest high-impact bathroom upgrade that exists. Twenty minutes, $40–250 depending on the fixture, beginner skill level. Wrench, pipe tape, done. Most people who have never done plumbing start here, and for good reason.
• How to deep-clean tile grout. The method that actually works — oxygen bleach paste, not the spray cleaners that only clean the grout on the surface. Sixty minutes, under $10 in materials, beginner skill level. The results are visible immediately and last for months if the bathroom is properly ventilated.
• How to paint a small bathroom. Four hours of work plus a full drying cycle, around $40 in paint, beginner skill level. The one change that affects every square inch of the room simultaneously. The guide covers surface prep, primer selection for high-humidity environments, and cutting in around the vanity without taping for three hours first.

Six mistakes every bathroom DIYer makes once

These six show up in our reader inbox more than any others. Some of them are expensive. All of them are avoidable once you know about them.

1. Caulking before the silicone has cured — and using the shower anyway

Silicone caulk requires a full 24 hours to cure before water exposure. The instructions say this on the tube, but the bathroom is often the only one in the house and people rationalize using the shower after six hours because it feels dry to the touch. Touch-dry and cured are not the same thing. Use the shower before the caulk has fully cured and you compromise the seal before it has formed. Budget the 24 hours. Use the gym. It is one day, and the alternative is redoing the caulk in a week.

2. Using sanded grout in joints under 1/8 inch

Sanded grout contains fine silica aggregate that provides dimensional stability in joints 1/8 inch and wider. Use it in a narrow joint — the kind between subway tile, glass mosaic, or standard 4x4 wall tile — and the aggregate cannot pack properly. The grout cures with internal stress and begins to crack within weeks. Narrow joints need unsanded grout. This information is printed on every bag of grout. The error is committed because the person is at the store and grabs the first bag without checking the joint-width specification on the side.

3. Installing a bathroom exhaust fan and venting it into the attic

A fan that terminates in the attic is not a ventilation fan. It is a moisture delivery system. Every time the fan runs, it pumps warm, humid bathroom air directly into the insulation and roof decking. Over months and years this leads to mold colonization, insulation saturation, and wood rot that can affect structural members. Every bathroom exhaust fan must terminate outdoors through a wall cap or roof vent. This is not optional and it is not a matter of code conservatism — it is physics. Attics are not vented spaces that absorb moisture; they trap it.

4. Over-tightening the toilet hold-down bolts

The toilet base is vitreous china — essentially a ceramic. The hold-down bolts that secure the toilet to the flange are meant to be snug, not torqued. The correct technique is hand-tight plus approximately one quarter turn with a wrench. Over-tightening cracks the base at the bolt holes, which is not immediately obvious and manifests as a hairline crack that worsens with the thermal cycling of water use. If the toilet rocks after snugging the bolts, the floor is uneven, not the bolts — use plastic shims at the base, do not crank harder on the bolts.

5. Painting the bathroom before sealing the tub and shower surround

The joint between the bathtub or shower base and the surrounding wall is a movement joint. The tub flexes under the weight of a person, the hot-water thermal cycle, and seasonal temperature changes. Paint does not flex with it. If you paint to the tub edge without a fresh bead of silicone at the joint, moisture migrates behind the paint at that seam every time someone takes a shower. The paint lifts, mold grows in the gap, and you are repainting and recaulking within a year. The correct sequence: caulk first, let cure fully (24 hours minimum), then paint.

6. Reusing the old wax ring when re-setting a toilet

A wax ring is a single-use gasket. It costs four dollars at any hardware store. It takes about thirty seconds to press into position. Reusing the old one, even if it looks intact, is gambling a four-dollar part against a sewage leak under the bathroom floor. Once a wax ring has been compressed under the weight of a toilet, its sealing geometry has been set. Removing and resetting the toilet — even for ten minutes to inspect the flange — means a new wax ring. Always. There is no scenario where saving four dollars on a wax ring is the right call.

What's worth paying a pro for

Most bathroom DIY falls within range of a careful homeowner. A few categories are genuinely pro-only territory.

• In-wall plumbing relocation. Moving a toilet drain, repositioning a shower valve, adding a new supply line through a finished wall — these require cutting into structural assemblies, and in most jurisdictions require a permit and licensed plumber work. The risk of a slow leak inside a wall is too high to DIY without the experience to verify the joint integrity of concealed connections.
• Gas water-heater swap. A tankless or tank water heater on gas requires licensed plumber (supply line) and sometimes licensed electrician (venting and controls) work. The penalty for a gas-line connection error is not recoverable. Pay for the install.
• Mold remediation in wet areas. Surface mold on caulk or tile grout is a cleaning project. Mold behind tile, inside walls, or in the subfloor is remediation — a professional scope of work that involves containment, testing, removal of affected materials, and treatment of the substrate. Do not attempt mold remediation inside walls without professional assessment first.
• Anything structural in a wet area. Replacing a subfloor section under a shower, rebuilding a damaged shower pan, reframing around a wet-area leak — these involve moisture-resistant materials, proper sequencing of waterproofing layers, and inspection at intermediate stages. This is the work where errors in sequencing are hidden by the finish layers and only emerge as leaks six months later.

The bathroom by zone — a different way to think about the room

The bathroom breaks into four functional zones, and most successful bathroom projects improve at least one zone in a way that is visible every day. Thinking in zones rather than in disconnected tasks often reveals upgrade opportunities that are adjacent to the original project.

The wet zone — shower, tub, and surround

The wet zone is the highest-stakes real estate in the bathroom. It is the zone in constant contact with water, steam, and body products. Every surface in the wet zone is a waterproofing decision: the tile, the grout, the caulk at the transitions, the cement board or membrane behind the tile, the drain assembly. Wet-zone projects carry more risk than any other bathroom work because failures are concealed and compound silently. The most-read wet-zone guides are: how to tile a shower wall, how to re-caulk a tub surround, and how to deep-clean tile grout.

The vanity zone — sink, mirror, and lighting

The vanity zone is where the highest-ROI bathroom upgrades live. A new faucet is sixty to ninety minutes of work. A new vanity light is forty-five minutes and transforms the quality of the light in the room. Framing a builder-grade mirror takes an afternoon and costs twenty-five dollars in mirror molding. Every change in the vanity zone is immediately visible every time a person enters the bathroom — it is the zone with the highest visual leverage per dollar of any bathroom work. The most-read vanity-zone guides are: how to install a vanity light, how to replace a bathroom faucet, and how to frame a bathroom mirror.

The toilet zone

The toilet zone is more DIY-accessible than most homeowners realize. A toilet swap — disconnecting the supply line, unbolting the old toilet, setting a new wax ring, setting the new toilet, connecting the supply line — is a two-hour job with no special tools beyond two adjustable wrenches and a bucket. The internal components of a toilet tank (fill valve, flush valve, flapper) are all replaceable with parts from any hardware store for under thirty dollars. The most-read toilet-zone guides are: how to install a toilet and how to fix a running toilet.

The storage zone — linen closet, medicine cabinet, and behind-the-door

The storage zone is the bathroom's quality-of-life problem. Almost every bathroom has the same issue: too many products, not enough organized space, and a under-sink cabinet that functions as a bin for overflow. The solutions are almost always inexpensive and fast — a set of pull-out bins under the sink, a medicine cabinet reset with vertical dividers, a behind-the-door hook system that claims the back of the door as organized storage. The most-read storage-zone guides are: how to organize under the bathroom sink and how to reset a medicine cabinet.

Five tools that earn their place specifically in bathroom work

Beyond the general home-maintenance toolkit, these five tools come up repeatedly across bathroom projects and are worth owning before you need them.

• Basin wrench ($18). The under-vanity faucet wrench. Without one, replacing a bathroom faucet requires reaching up into a six-inch-clearance cabinet and trying to loosen supply line nuts by feel with a box wrench. With one, it takes thirty seconds. The basin wrench is why experienced plumbers make faucet work look easy.
• Caulk-removal tool and razor scraper ($15 combined). Old silicone caulk does not come off with a putty knife — it smears, tears, and leaves a film on the tile surface that new caulk will not adhere to properly. The oscillating caulk-removal tool (or the dedicated plastic caulk-removal blade) gets the bulk off cleanly; the razor scraper cleans the tile surface. Both are necessary for a recaulk job that will last.
• Toilet auger ($25). Different from a sink snake. A toilet auger has a protective rubber housing that protects the porcelain bowl while reaching past the trap. A standard drain snake will scratch the bowl and usually cannot reach the obstruction in a toilet trap anyway. If you are going to clear your own toilet clogs (rather than calling a plumber), own the right tool.
• Silicone caulk applicator with smoothing tip ($8). A caulk gun gets the material out of the tube; the smoothing tip is what makes it look professional. The technique — apply a consistent bead, then pull the smoothing tip along the joint in one pass with light pressure — takes thirty seconds to learn and makes the difference between a bead that looks like a first attempt and one that looks like a finished install.
• GFCI outlet tester ($12). Every bathroom outlet must be GFCI-protected, and every GFCI outlet must be wired correctly for the protection to work. A correctly wired GFCI outlet that is wired load-end-to-load-end will also protect downstream outlets. The tester confirms the outlet is wired correctly and that the GFCI trips as designed. Plug it into every bathroom outlet after any electrical work — and into every outlet in the bathroom even if you did not do electrical work, to confirm what was there before.

Refresh, renovate, or rebuild — three scopes

Most bathroom projects fall into one of three scopes. Knowing which scope you are in before you start saves money, time, and the surprise of a project that grows past what you budgeted for.

Refresh — under $1,000, one weekend, no permit required

A bathroom refresh is the set of changes you can make in a weekend without touching the walls, the plumbing supply lines, or the electrical panel. New showerhead. New faucet. New towel bars and toilet-paper holder in a matching finish. Paint the walls. Frame the mirror. Swap the vanity light. Re-caulk the tub surround. These projects individually take one to four hours and collectively transform the feel of the bathroom without requiring any contractor coordination or permit. Best ROI per dollar of any bathroom work. Every project at this scope is covered in our six task lanes with full step-by-step guides.

Renovate — $5,000–$25,000, several weeks, sometimes a permit

A bathroom renovation replaces the major fixtures — toilet, vanity, tub or shower, tile — while keeping the room's footprint and rough-in locations the same. New vanity cabinet and countertop. Retiled shower or tub surround. New toilet. New exhaust fan with proper ductwork. Sometimes a new window. Renovations require coordinating a tile installer, a plumber for fixture rough-ins, and an electrician for GFCI outlets and ventilation. DIY scope is roughly thirty percent — demo, painting, minor installations after rough-in is done, and punch-list items. Permits are typically required for any electrical or plumbing work beyond like-for-like fixture swaps.

Rebuild — $25,000 and up, months, definitely a permit

Down to studs. New layout, new plumbing rough-in, new electrical, new tile, new fixtures, new flooring, sometimes new windows. A bathroom rebuild is a general-contracting project. The permit process alone — mechanical, electrical, plumbing — takes weeks in most jurisdictions. DIY scope in a rebuild is approximately zero unless you have prior experience in each trade. Read our Plumbing trade page and General Contracting trade page before planning this scope of work.

Other rooms to do

Most bathroom projects do not stop at the bathroom door. The new showerhead makes you notice the kitchen faucet is starting to drip. The bathroom paint job makes you realize the hallway is a different shade of white. Here are the other room hubs on this site — each organized the same way, six task lanes, guides written by people who did the work themselves.

• Kitchen — 312 guides across six task lanes. The room with the most expensive appliances and the most water risk. Backsplashes, faucets, disposals, range hoods, and the oven you have been meaning to deep-clean.
• Bedroom — 198 guides. Closet buildouts, blackout shades, ceiling fan installs, the dimmer switch that pays back its installation in three nights of better sleep.
• Living Room — 247 guides. TV mounts, floating shelves, picture rails, accent walls, and the floor lamp whose wiring you have been meaning to redo for two years.
• Basement — Sump pumps, egress windows, dehumidifiers, framing projects for finishing a space that has been storage since you moved in.
• Garage — Slat walls, overhead storage racks, a workbench that does not wobble when you need it, and the outlet that should have been there from the start.
• Attic — Insulation, pull-down stairs, ventilation. The room that is most frequently neglected and most directly connected to your heating and cooling bill.
• Exterior — House numbers, mailboxes, smart locks, porch lights, and the entry that is the first thing every visitor sees.
• Deck & Patio — Pavers, pergolas, string lights, outdoor outlets, and the outdoor space that is currently underused because it is not set up for actual use.
• Lawn & Garden — Raised beds, drip irrigation, fence posts, gates, and the lawn that has been patchy since that dry August three years ago.

About this hub

The bathroom room hub aggregates every guide written for the bathroom across all six task lanes. Each lane-and-room intersection — for example, Bathroom Install with its 51 guides, or Bathroom Repair with its 49 — has its own dedicated landing page with the full menu of guides at that intersection. The room hub is the right starting point if you do not know what you want to do; the lane-and-room intersection page is the right starting point if you do. If you arrived knowing you need to repair something, go directly to Bathroom Repair. If you arrived knowing you need to install something, go directly to Bathroom Install. If you have a specific guide in mind, the five most-searched guides above are the fastest way in.

The bathroom room hub is part of the Layer 1 editorial spine of HowTo: Home Edition. The seven task-lane hubs — Repair, Install, Build, Clean, Organize, Decorate, and Trades — are the entry point if you do not have a room in mind yet. The bathroom hub is the entry point if the room is clear and the verb is not. Both are valid. Both lead to the same 163 guides.