Bathtub Replacement Guide: Types, Cost and Process

What types of bathtubs are available for replacement?

Understanding the installation category before shopping prevents expensive surprises. Swapping an alcove tub for a freestanding model, for example, typically requires relocating the drain, adding a floor flange, and patching the tile surround -- work that can add $800 to $2,000 to the base project cost.

Alcove Tubs

Alcove bathtubs fit into a three-walled recess and are the most common configuration in North American homes built after the 1960s. Standard dimensions are 60 inches long by 30 or 32 inches wide, with a 14- to 17-inch interior depth. Because the three walls hide the rough edges of the tub flange, installation is straightforward and the surrounding tile or tub surround panels bear the finished look. Most acrylic and fiberglass options weigh between 60 and 90 pounds, which one or two installers can carry through a standard doorway.

Freestanding Tubs

Freestanding bathtubs stand on four legs or a solid base and are visible on all sides. They are a focal point in master bathrooms and open-concept wet rooms. Cast iron clawfoot tubs are the traditional choice; acrylic and stone resin freestanding tubs are popular modern alternatives. Stone resin models from brands like Woodbridge typically weigh 250 to 350 pounds dry, so floor-load capacity must be confirmed before purchase. Freestanding tubs require a floor-mount faucet or a freestanding tub filler, and the drain must be precisely located under the tub's drain opening.

Drop-In and Undermount Tubs

Drop-in tubs sit inside a platform or deck that is built to surround them, with the tub rim resting on top of the deck surface. Undermount tubs are secured beneath the deck surface so the rim is hidden, creating a seamless look similar to an undermount kitchen sink. Both types require a custom-built platform -- typically framed in wood and tiled -- which adds carpentry labor to the project. Drop-in and undermount configurations are popular in master bath renovations where the deck can double as a display ledge or seating area.

Walk-In Tubs

Walk-in tubs include a door in the side wall that allows entry and exit without stepping over a high threshold, making them valuable for seniors and people with limited mobility. The door seals watertight when the tub is in use. Walk-in tubs require you to enter before filling and wait for the water to drain before exiting, which is a functional trade-off many users accept. Brands including American Standard and Kohler offer walk-in models with hydrotherapy jets. Installation costs are higher because most units include air jets, heated seats, and quick-drain systems that all require connections.

Corner Tubs

Corner tubs are triangular or square-corner units designed to fit diagonally across a bathroom corner, maximizing capacity in compact spaces. They are most common in older homes where a corner of the bathroom is otherwise wasted space. Because they are larger than standard alcove tubs -- often 60 by 60 inches or more -- they require a stronger subfloor and larger water heater capacity if jetted.

Note: Cast iron marked as Best Overall for combined durability and heat retention; for most renovation budgets, acrylic offers the best value per year of service life.

How much does bathtub replacement cost in 2026?

Cost Breakdown by Project Phase

Getting an accurate budget means separating the project into its component phases. Hidden costs -- particularly subfloor repair and tile work -- catch most homeowners off guard.

What Drives Cost Up

Three factors account for the majority of budget overruns: drain relocation, subfloor damage, and tile work scope. If the existing subfloor shows rot, black mold, or soft spots once the old tub is removed -- which is common in bathrooms older than 20 years -- repairing it before setting the new tub adds $200 to $1,000 depending on the extent. Tile work is similarly variable: a three-wall subway tile surround with simple grout lines costs far less than a large-format stone tile installation with a niche and linear drain.

Bathtub Liner Alternative

If the existing tub is structurally sound but cosmetically worn -- chips, stains, surface cracks -- a bathtub liner or reglazing service costs $300 to $1,000 and can extend the tub's useful life by 10 to 15 years. Liners are acrylic shells custom-molded to fit over the existing tub. They are not a long-term solution for tubs with structural cracking or failing surrounds, but they are a legitimate low-cost option for otherwise solid units.

What is the step-by-step process for replacing a bathtub?

Step 1: Preparation and Shut-Off

Turn off the water supply to the bathroom at the main or at the dedicated bathroom shut-off valve if one exists. Remove the drain stopper, overflow cover, and faucet handles. Protect the bathroom floor with drop cloths or cardboard. If working in a multi-story home, check the ceiling of the room directly below the bathroom for any signs of existing water damage before beginning demolition -- damage found after the fact is not typically the contractor's responsibility.

Step 2: Tile and Surround Removal

Use a grout saw or oscillating multi-tool to cut grout lines around the perimeter of the surround. Remove tile from the bottom row first to expose the tub flange beneath. Work upward in sections. On older installations you may find cement board, drywall, or green board behind the tile -- inspect the condition of whatever backer material is present. Any backer that has been wetted repeatedly will typically need replacement to prevent mold behind the new installation.

Step 3: Tub Disconnection and Removal

Disconnect the drain by unscrewing the drain flange (a tub drain wrench or a cross-hair tool fits into the drain crossbars). Disconnect the overflow plate and the P-trap connection beneath the floor. Cut the caulk line between the tub rim and the walls with a utility knife. Most acrylic and fiberglass tubs can then be slid out of the alcove; cast iron tubs must be cut into pieces with an angle grinder fitted with a metal-cutting wheel because they cannot be carried out whole through a standard doorway.

Step 4: Subfloor and Framing Inspection

With the old tub removed, inspect the subfloor inside the alcove for soft spots, discoloration, and rot. Press firmly on any suspect areas. Repair or sister any damaged joists and replace affected sections of subfloor before proceeding. This is also the right time to install blocking in the framing studs if the new tub manufacturer specifies a ledger board to support the tub flange -- most acrylic manufacturers do.

Step 5: Setting and Leveling the New Tub

Slide the new tub into position and check level in both directions with a 4-foot level. Shim as needed under the feet or base. Mark the stud locations on the wall above the tub lip before the tub is in its final position so you can fasten the flange to the studs. Apply a mortar bed or pre-mixed thinset under the tub base if the manufacturer requires it -- acrylic tubs in particular can flex and crack at the drain if not fully supported underneath.

Step 6: Plumbing Connection

Connect the overflow assembly and the drain flange to the tub body per the manufacturer's instructions before the tub is fully pushed into its final position, as access is difficult afterward. Connect the P-trap to the drain stub-out in the floor. Reconnect or replace the faucet valve and spout. Turn the water back on and check all connections for leaks before tiling the surround.

Step 7: Backer and Tile Installation

Install cement board backer on all three walls of the alcove from the tub flange to the height of the planned tile, overlapping the tub flange by the dimension specified by the backer manufacturer (typically 1/4 inch). Apply a waterproofing membrane over the cement board joints and at the corners. Set tile from the centerline of the wall outward, maintaining consistent grout joints. Allow mortar and grout to cure fully -- typically 24 to 48 hours -- before caulking the tub-to-tile joint. Use a 100% silicone caulk (not grout) at the tub-to-wall joint because grout cracks as the tub flexes.

Should you replace a bathtub or repair it?

Repair Options: Reglazing and Liners

Professional reglazing (also called refinishing or resurfacing) applies a bonding primer and a topcoat -- typically a two-part epoxy or polyurethane -- over the existing tub surface. The result looks like a new tub for two to five years under normal use, and the work takes one day with a 24-hour cure time before use. Cost is typically $300 to $600. Avoid DIY reglazing kits; the professional spray-applied process requires proper ventilation and skill to achieve a durable bond. Reglazing does not address structural cracks or subfloor damage.

Bathtub liners are prefabricated acrylic shells custom-made from measurements of the existing tub. They are pressed over the old tub surface and secured with adhesive. Installation takes one day and costs $700 to $1,500. A liner adds about 1 inch of height to the tub walls, which can reduce interior depth. Liners are a sound choice when the old tub is mechanically sound and removal would be difficult -- for example, an older cast iron tub in a room with limited access.

When Replacement Is the Right Call

Replace the tub if any of the following apply: structural cracks in the shell, a surface that has been reglazed twice and is failing again, evidence of water damage in the subfloor or walls adjacent to the tub, a desire to change tub type or location, or an accessibility need that the current tub does not serve. Replacement is also a better long-term investment before a home sale, as buyers can identify a reglazed tub on inspection and may negotiate accordingly.

If your bathroom also needs a toilet upgrade, see the best flushing toilets guide to coordinate your bathroom remodel efficiently. Combining a tub replacement with a toilet replacement in the same project can reduce total labor costs by 15 to 25 percent since the plumber and tile-setter are already mobilized.

How long does a bathtub replacement take?

Schedule Factors That Add Time

The tile installation phase introduces the most schedule uncertainty because tile adhesive (thinset) must cure 24 hours before grouting, and grout must cure 24 to 48 hours before the caulk is applied. Fast-setting thinset products can compress this timeline, but most professional installers use standard products to ensure bond strength. Permit inspections, if required by the local authority having jurisdiction, can add one to three days depending on inspector availability.

Subfloor damage discovered during demolition is the most common source of project extension. If a contractor uncovers significant rot or mold remediation needs, the project can expand by one to three additional days while structural repairs are made and verified.

DIY vs. Professional Timeline

An experienced DIYer working weekends can complete a standard alcove swap in two to three weekends -- plumbing on weekend one, tile on weekend two, grouting and finishing on weekend three. However, bathtub installation involves tile waterproofing details that, if done incorrectly, create expensive hidden water damage over time. Most homeowners without tiling experience are better served by hiring a licensed contractor for the surround installation even if they handle the painting and accessory installation themselves. Plumbing connections to a drain must meet local code; in most jurisdictions this requires a licensed plumber or a permitted homeowner-performed rough-in inspection.

For related plumbing and bathroom remodel guides, see our articles on how to choose a bathroom contractor, bathroom drain systems explained, and accessible bathroom remodeling for aging in place.

Choosing the Right Bathtub Brand and Model

Material quality, warranty terms, and parts availability vary significantly across brands. Here is what the major manufacturers offer in the bathtub category.

TOTO

TOTO is best known for its toilet innovation -- particularly the TOTO Drake, TOTO Drake II, TOTO UltraMax II, and TOTO Aquia IV -- but the company also manufactures a focused line of acrylic soaking tubs and freestanding models. TOTO bathtubs use the same quality control standards as their toilet line and carry a one-year limited warranty on the fixture itself. TOTO's bathtub lineup is narrower than competitors but the brand's reputation for fit-and-finish quality is strong among plumbers and contractors.

Kohler

Kohler produces one of the broadest bathtub lineups in North America, spanning basic alcove fiberglass units to cast iron freestanding models to jetted therapeutic tubs. Their alcove tubs include the Underscore and Archer series in acrylic, with quiet, reinforced bases. Kohler's cast iron tubs are manufactured at their Kohler, Wisconsin plant and carry a limited lifetime warranty on the enamel finish. The Kohler Highline and Kohler Cimarron are flagship toilet models, but Kohler's bathtub reputation is equally strong in the mid-to-high segment.

American Standard

American Standard's bathtub line includes the Cambridge (alcove), Cadet (alcove acrylic), and a range of walk-in tubs under their SafetyWalk and Walk-In series. The American Standard Champion 4 and American Standard Cadet 3 are dominant in the toilet category; the same brand reliability carries into their tub line. American Standard alcove tubs in acrylic use a proprietary EverClean antimicrobial surface treatment that inhibits the growth of stain-causing bacteria, mold, and mildew on the tub surface -- the same technology used on their toilet vitreous china.

Woodbridge

Woodbridge has become a prominent player in the freestanding tub market, particularly in the stone resin and acrylic freestanding categories. Their Woodbridge T-0001 series freestanding soaking tub is one of the most reviewed freestanding tubs on the market, consistently rated highly for gloss finish durability and drain hardware quality. Woodbridge tubs are available in both white and matte finishes and come with a five-year warranty on the tub and drain assembly, which is above average for the category.

Swiss Madison

Swiss Madison focuses on modern European-influenced bathroom fixtures, including freestanding acrylic soaking tubs in clean, simple silhouettes. Their tubs are popular in apartment and condo renovations where design aesthetics matter and the budget is moderate. Swiss Madison freestanding tubs carry a one-year limited warranty and are generally lighter-weight acrylic construction suitable for standard floor loads without additional structural reinforcement.

Gerber

Gerber Plumbing manufactures alcove bathtubs in fiberglass and acrylic, typically distributed through plumbing supply houses rather than big-box retail. Gerber's bathtubs are favored in new construction and contract work for their consistent fit tolerances and competitive pricing at volume. Their warranty structure is comparable to mid-range offerings from American Standard and Kohler.

Permits, Codes and Water Efficiency Considerations

Do You Need a Permit to Replace a Bathtub?

Permit requirements for bathtub replacement vary by municipality. In general, a like-for-like replacement -- same location, no plumbing relocation -- falls below the permit threshold in many jurisdictions and is treated as a repair rather than an alteration. However, if the project involves relocating the drain or supply lines, converting a bathtub space to a walk-in shower, or adding an egress window, a building permit is almost always required. Check with your local building department before starting work; permit fees are typically $50 to $300 and are a small fraction of the project cost, but working without a required permit can create issues at resale or with homeowner insurance claims.

EPA WaterSense and Water Efficiency

The EPA WaterSense program certifies water-efficient toilets, showerheads, and faucets, but bathtubs are not included in the WaterSense certification framework because bathtubs do not have a standardized flow rate to certify. Water efficiency in bathtub selection is primarily a function of the tub's water capacity: a standard 60-inch alcove tub holds approximately 42 to 60 gallons when filled to the overflow, while a large freestanding soaking tub may hold 70 to 100 gallons. If water conservation is a priority, a soaking tub with a smaller footprint or a dual shower-tub configuration that encourages shower use over bath use is worth considering. The ADA compliant toilet guide also covers water efficiency standards relevant to full bathroom remodels.

Accessibility Codes: ADA and ANSI A117.1

Residential bathrooms are not required by federal law to meet ADA (Americans with Disabilities Act) standards, which apply to public accommodations and commercial facilities. However, many homeowners choose to follow ANSI A117.1 Accessible and Usable Buildings and Facilities standards voluntarily, particularly when remodeling for aging in place. For bathtub installations, relevant ANSI dimensions include a minimum 60-inch tub length, a seat area at one end of the tub, and grab bar blocking in the framing around the tub perimeter. Installing grab bar blocking at the time of tub replacement adds minimal cost ($50 to $150 in materials) and eliminates the need to open the wall later to add grab bars.

• EPA WaterSense, epa.gov/watersense
• MaP flush testing, map-testing.com
• Manufacturer published specifications
• ANSI A117.1 Accessible and Usable Buildings and Facilities standard
• National Association of Home Builders, nahb.org
• Remodeling Magazine Cost vs. Value Report, costvsvalue.com
• Tile Council of North America installation handbook, tcnatile.com

• Accessible Bathroom Remodeling: ADA Fixtures and Grab Bar Placement
• How to Choose a Bathroom Remodeling Contractor
• Bathroom Drain Systems: P-Traps, Venting and Clogs Explained
• ADA Compliant Toilet Guide: Height, Clearance and Certification
• Best Flushing Toilets: MaP-Tested and WaterSense Certified