How much does a primary bathroom renovation cost?

We do not publish a figure, and we will not borrow one from a different kind of project — the published benchmarks we hold cover additions and new construction, not bathrooms. What drives the number is whether plumbing moves (and whether the house is on a slab, where relocating a drain means cutting concrete), which waterproofing system goes behind the tile, whether the shower is curbless, the fixture specification, and the tile format. Two bathrooms of identical size can differ enormously on those points while photographing similarly.

What makes a bathroom renovation luxurious?

Less than people expect, and different things than the photographs suggest. The elements that consistently read as luxury are spatial and tactile: generous circulation, a shower large enough not to feel like a cubicle, natural light, continuous surfaces with few interruptions, and fittings that operate with weight and precision. Expensive materials in a cramped or badly lit layout do not read as luxury; a restrained material palette in a well-proportioned room usually does. Heated floors and good lighting design deliver more felt quality per pound than an upgraded stone.

Is a curbless shower practical?

Yes, and it is the single most useful thing you can do for ageing in place. The practical requirement is that the floor still has to fall to a drain, and without a curb that fall starts further back — so the subfloor is recessed, or the bathroom floor is built up. On a slab that usually means depressing the slab or raising the finished floor across the room. Containment comes from slope, glass placement and a correctly positioned linear drain rather than from the curb. Done well it is invisible; done casually it puts water on the floor daily.

What waterproofing systems should bathrooms use?

Either a bonded sheet membrane or a liquid-applied membrane, carried continuously up the walls, across the floor, and correctly tied into the drain. The system matters less than the continuity: failures occur at transitions — wall-to-floor, the curb, the drain flange, niches, benches and pipe penetrations — not in the middle of a wall. Tile, grout and cement board are not waterproof; the membrane behind them is the only thing keeping water out of the structure. Ask any builder which system they use and how they detail the transitions, because you cannot inspect it once the tile is on.

How do I prevent mold in a remodeled bathroom?

Ventilation and waterproofing, in that order of neglect. The most common cause is a fan that is undersized for the room or ducted into the attic rather than to the outside — which moves moist air out of the bathroom and into the roof structure. Size the fan for the room volume, duct it outside, and run it long enough after a shower to clear the humidity, which usually means a timer rather than the light switch. Behind the tile, a continuous membrane prevents the slow saturation that produces mould you cannot see.

Can I move bathroom plumbing?

Supply lines, fairly readily. Drains, less so — a drain runs on gravity at a required fall and must connect to a stack with venting arranged so the trap does not siphon. Toilets are the hardest to move for that reason. On a slab foundation, common in North Texas, relocating a drain means cutting the concrete, re-routing beneath and re-pouring. On pier-and-beam there is a crawl space, which is easier but can still be structural if joists are in the way. In Fort Worth, plumbing work requires its own permit, separate from the building permit.

Is a freestanding tub worth installing?

It depends on whether it will be used and whether the room can give it the space it needs. A freestanding tub needs clearance on all sides to read correctly and to be cleaned around, and it requires either a floor-mounted filler — which means supply coming up through the floor, decided early — or a wall-mounted one positioned to reach. In a room that cannot spare that clearance, a well-detailed alcove tub is the better outcome. Be honest about use: a sculptural tub that nobody bathes in is expensive floor area.

How long does a bathroom remodel take?

We do not publish a standard duration, because it depends on scope, whether plumbing moves, permitting, fixture lead times and what is found when the walls open. What paces the work is the sequence: demolition, then any structural or drain work, then rough-in with an inspection before anything is covered, then waterproofing, then tile, then fittings. Several of those cannot be compressed — waterproofing and setting materials have cure times that are not negotiable. You should have a schedule as part of preconstruction rather than an estimate offered before a scope exists.

What is the best bathroom flooring?

Porcelain tile is the default for good reasons: it is impervious, hard-wearing, works with underfloor heating and comes in formats from small mosaic to large slab. Natural stone is beautiful and needs sealing, and marble will etch where it meets acidic products. Luxury vinyl is genuinely waterproof and far warmer underfoot, though it will not carry the same feel. Whatever the material, slip resistance matters more than it sounds — a large-format polished tile that looks superb dry is a hazard wet, so check the manufacturer's slip rating for a wet area rather than choosing on appearance alone.

Can I enlarge my primary bathroom?

Usually, by taking space from an adjacent closet or bedroom. The question is what the wall is doing rather than whether it can move: if it is load-bearing, the opening needs a beam and support carried down to adequate footing; if it carries the plumbing stack, the stack must be re-routed or the plan worked around it. The second question is what you give up — taking a closet to gain a larger shower often makes a house harder to sell, because storage is scarcer than square footage in most homes. Worth drawing the alternative beside it before deciding.

Bathroom Remodeling

Bathroom Renovation: What Drives the Cost, and What Fails if You Get It Wrong

A bathroom's cost is driven by three things: whether plumbing moves, what is behind the tile, and the fixture specification. The first two are invisible in a finished photograph and are where the real money and the real risk sit. We do not hold a published cost benchmark specific to bathroom remodelling, so this guide explains what moves the number rather than quoting a figure borrowed from a different kind of project.

Reviewed November 4, 2026

Waterproofing is the whole job

Tile is not waterproof. Grout is not waterproof. Cement board is not waterproof. Water passes through a tiled surface routinely, and what stops it reaching the structure is a membrane system behind the tile — either a sheet membrane bonded to the substrate, or a liquid-applied coating, carried continuously up the walls, across the floor, and correctly tied into the drain.

The word doing the work there is continuously. Failures almost never happen in the middle of a wall. They happen at transitions: where the wall membrane meets the floor, at the curb, around the drain flange, at a niche, at a bench, and where a pipe penetrates. A bathroom can be beautifully tiled over a waterproofing system with a gap at one corner and look perfect for three years.

This is why a bathroom bid that is meaningfully cheaper deserves a direct question: which membrane system, and how are the transitions detailed. A homeowner cannot inspect this after the tile goes on, which is exactly why it is worth asking before.

Moving plumbing, and why it is not a small change

Supply lines are flexible about where they go. Drains are not. A drain runs on gravity at a required fall, and it has to connect to an existing stack with a vent arranged so the trap does not siphon. Moving a toilet is the hardest of these, because the drain is the largest and the least tolerant of a changed route.

On a slab foundation — common across North Texas — relocating a drain means cutting the concrete, re-routing below, and re-pouring. On a pier-and-beam house there is a crawl space to work in, which is easier but still structural if joists are in the way. This is the single most common reason a bathroom layout that looks obvious on paper turns out to be expensive.

In Fort Worth, plumbing work requires its own permit, separate from the building permit. So a layout change is an administrative step as well as a construction one.

Curbless showers: practical, but not free

A curbless shower is genuinely good design — it reads larger, it is easier to clean, and it is the single most useful thing you can do for ageing in place. It also asks more of the floor than a standard shower does.

The floor inside the shower still has to fall to a drain, and without a curb that fall has to start further back, which means recessing the subfloor or building the whole bathroom floor up. On a slab, that usually means depressing the slab or raising the finished floor across the room. Either is achievable; neither is a finish-level decision made late.

Containment becomes a design problem too. Without a curb, water is kept in by slope, glass placement and a linear drain positioned to catch it. Done well it is invisible. Done casually it puts water on the bathroom floor every morning.

Where the budget actually goes

Fixture specification is the widest visible variable — a shower valve, a freestanding tub and a vanity can each differ by a factor of five between options that look broadly similar in a photograph. But the invisible items are what separate a bathroom that lasts from one that does not: the membrane system, the substrate, the valve body behind the trim, and the ventilation.

Ventilation deserves a specific mention because it is the cheapest item on this list and the most frequently undersized. A fan that is too small, or ducted into an attic rather than outside, is the most common cause of the mould people later blame on the shower.

Does plumbing move, and is the house on slab or pier-and-beam
Which waterproofing system, and how transitions are detailed
Curb or curbless, and what that asks of the floor structure
Fixture and fitting specification, including the valve bodies
Ventilation sized and ducted to outside
Whether the layout change affects an adjacent room or closet
Tile format and pattern — large formats need flatter substrate, patterns need more cuts and labour

Enlarging a bathroom

Most primary bathrooms are enlarged by taking space from somewhere adjacent — usually a closet or a secondary bedroom. The question is rarely whether the wall can move; it is what the wall is doing. If it is load-bearing, the opening needs a beam and support down to footing. If it carries the plumbing stack, the stack has to be re-routed or the plan adjusted around it.

The second question is what you lose. Taking a closet to gain a larger shower frequently makes a house harder to sell, because storage is scarcer than square footage in most homes. That is a trade worth making deliberately, with the alternative drawn next to it.

Questions This Guide Answers

How much does a primary bathroom renovation cost?: We do not publish a figure, and we will not borrow one from a different kind of project — the published benchmarks we hold cover additions and new construction, not bathrooms. What drives the number is whether plumbing moves (and whether the house is on a slab, where relocating a drain means cutting concrete), which waterproofing system goes behind the tile, whether the shower is curbless, the fixture specification, and the tile format. Two bathrooms of identical size can differ enormously on those points while photographing similarly.
What makes a bathroom renovation luxurious?: Less than people expect, and different things than the photographs suggest. The elements that consistently read as luxury are spatial and tactile: generous circulation, a shower large enough not to feel like a cubicle, natural light, continuous surfaces with few interruptions, and fittings that operate with weight and precision. Expensive materials in a cramped or badly lit layout do not read as luxury; a restrained material palette in a well-proportioned room usually does. Heated floors and good lighting design deliver more felt quality per pound than an upgraded stone.
Is a curbless shower practical?: Yes, and it is the single most useful thing you can do for ageing in place. The practical requirement is that the floor still has to fall to a drain, and without a curb that fall starts further back — so the subfloor is recessed, or the bathroom floor is built up. On a slab that usually means depressing the slab or raising the finished floor across the room. Containment comes from slope, glass placement and a correctly positioned linear drain rather than from the curb. Done well it is invisible; done casually it puts water on the floor daily.
What waterproofing systems should bathrooms use?: Either a bonded sheet membrane or a liquid-applied membrane, carried continuously up the walls, across the floor, and correctly tied into the drain. The system matters less than the continuity: failures occur at transitions — wall-to-floor, the curb, the drain flange, niches, benches and pipe penetrations — not in the middle of a wall. Tile, grout and cement board are not waterproof; the membrane behind them is the only thing keeping water out of the structure. Ask any builder which system they use and how they detail the transitions, because you cannot inspect it once the tile is on.
How do I prevent mold in a remodeled bathroom?: Ventilation and waterproofing, in that order of neglect. The most common cause is a fan that is undersized for the room or ducted into the attic rather than to the outside — which moves moist air out of the bathroom and into the roof structure. Size the fan for the room volume, duct it outside, and run it long enough after a shower to clear the humidity, which usually means a timer rather than the light switch. Behind the tile, a continuous membrane prevents the slow saturation that produces mould you cannot see.
Can I move bathroom plumbing?: Supply lines, fairly readily. Drains, less so — a drain runs on gravity at a required fall and must connect to a stack with venting arranged so the trap does not siphon. Toilets are the hardest to move for that reason. On a slab foundation, common in North Texas, relocating a drain means cutting the concrete, re-routing beneath and re-pouring. On pier-and-beam there is a crawl space, which is easier but can still be structural if joists are in the way. In Fort Worth, plumbing work requires its own permit, separate from the building permit.
Is a freestanding tub worth installing?: It depends on whether it will be used and whether the room can give it the space it needs. A freestanding tub needs clearance on all sides to read correctly and to be cleaned around, and it requires either a floor-mounted filler — which means supply coming up through the floor, decided early — or a wall-mounted one positioned to reach. In a room that cannot spare that clearance, a well-detailed alcove tub is the better outcome. Be honest about use: a sculptural tub that nobody bathes in is expensive floor area.
How long does a bathroom remodel take?: We do not publish a standard duration, because it depends on scope, whether plumbing moves, permitting, fixture lead times and what is found when the walls open. What paces the work is the sequence: demolition, then any structural or drain work, then rough-in with an inspection before anything is covered, then waterproofing, then tile, then fittings. Several of those cannot be compressed — waterproofing and setting materials have cure times that are not negotiable. You should have a schedule as part of preconstruction rather than an estimate offered before a scope exists.
What is the best bathroom flooring?: Porcelain tile is the default for good reasons: it is impervious, hard-wearing, works with underfloor heating and comes in formats from small mosaic to large slab. Natural stone is beautiful and needs sealing, and marble will etch where it meets acidic products. Luxury vinyl is genuinely waterproof and far warmer underfoot, though it will not carry the same feel. Whatever the material, slip resistance matters more than it sounds — a large-format polished tile that looks superb dry is a hazard wet, so check the manufacturer's slip rating for a wet area rather than choosing on appearance alone.
Can I enlarge my primary bathroom?: Usually, by taking space from an adjacent closet or bedroom. The question is what the wall is doing rather than whether it can move: if it is load-bearing, the opening needs a beam and support carried down to adequate footing; if it carries the plumbing stack, the stack must be re-routed or the plan worked around it. The second question is what you give up — taking a closet to gain a larger shower often makes a house harder to sell, because storage is scarcer than square footage in most homes. Worth drawing the alternative beside it before deciding.

Sources

City of Fort Worth — Residential Permitting — Development ServicesAccessed November 2, 2026. Relied on for: Which residential work requires a permit in Fort Worth, the 16 sq ft drywall threshold, cosmetic-work exemptions, the engineered-plan requirement for foundations, and the separate electrical, plumbing and mechanical permits.

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Speak with a NARI Certified Remodeling Designer

Get focused, one-on-one guidance for your renovation with Jennifer Valdes, CRD, NARI Certified Remodeling Designer.

This is a paid advisory service, booked and paid separately. It is not required before hiring PHR Design Build, and it is not part of a project consultation. Your full consult fee is credited toward a Design + Preconstruction agreement signed within 90 days.

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