How Long Does It Take to Replace a Bathtub?

Quick Answer

Replacing a bathtub typically takes 1–7 days depending on the type of tub, the scope of plumbing changes, and whether you are doing a like-for-like swap or converting to a different style. A straightforward alcove tub replacement is the fastest, while walk-in tub conversions require the most time.

Timeline by Tub Type

Tub Type	Installation Time	Notes
Alcove tub (like-for-like)	1–2 days	Same footprint, minimal plumbing changes
Alcove tub (different size)	2–3 days	Framing and plumbing adjustments needed
Freestanding tub	2–4 days	New plumbing routing, floor reinforcement possible
Walk-in tub	3–5 days	Significant plumbing and framing modifications
Tub-to-shower conversion	3–7 days	Full replumbing, new drain location, wall finishing

Alcove Tub Replacement (1–3 Days)

An alcove tub sits between three walls and is the most common type in residential homes. Replacing one with the same size tub is the simplest scenario.

Day 1: Demolition and Removal

• Shut off water supply and disconnect drain and overflow
• Remove faucet, handles, and showerhead
• Cut away surround panels or tile along the tub flange (1–3 hours)
• Disconnect and remove the old tub (may require cutting it into pieces for fiberglass/acrylic tubs)
• Inspect subfloor and framing for water damage and repair if needed

Day 1–2: Installation

• Set the new tub in place and check for level
• Secure the tub flange to wall studs
• Connect the drain assembly and overflow
• Reconnect water supply lines and install new fixtures if desired
• Test for leaks thoroughly

Day 2–3: Finishing

• Install new surround panels or patch and re-tile the walls
• Apply silicone caulk at all joints between the tub and walls
• Allow caulk to cure 24 hours before use

Freestanding Tub Installation (2–4 Days)

Freestanding tubs are a popular upgrade but involve more work:

• Floor drain relocation: The drain must be accessible from below, which may require cutting into the subfloor
• Floor reinforcement: Cast iron tubs can weigh 300–500 pounds when full; verify the floor framing can support the load
• Plumbing routing: Supply lines and the drain must be routed to the tub's new position, often requiring work below the floor
• Floor-mounted or wall-mounted faucet: Requires new supply line routing

Walk-In Tub Conversion (3–5 Days)

Walk-in tubs are taller and narrower than standard tubs, requiring more extensive modifications:

• Existing framing may need to be altered to accommodate the different dimensions
• Electrical work is needed for heated seats, jets, or quick-drain pumps
• The door seal and threshold must be perfectly level to prevent leaks
• Water heater capacity should be verified, as walk-in tubs hold 50–80 gallons

Factors That Affect Timeline

• Water damage: Discovering rotted subfloor or studs can add 1–2 days for repairs
• Plumbing changes: Moving the drain or supply lines adds significant time
• Tile work: Re-tiling walls around the new tub can add 1–2 days including mortar and grout cure time
• Permit requirements: Some jurisdictions require plumbing permits for tub replacement, which can delay the start
• Access: Second-floor bathrooms or tight hallways make removing the old tub and getting the new one in more difficult
• Tub material: Acrylic and fiberglass tubs are lighter and easier to maneuver than cast iron or steel

Cost Considerations

Component	Typical Cost Range
Standard alcove tub	$200–$800
Freestanding tub	$500–$3,000
Walk-in tub	$2,000–$8,000
Professional labor	$1,000–$4,000
Plumbing modifications	$500–$2,000
Tile/surround work	$300–$1,500

DIY vs. Professional Installation

A like-for-like alcove tub swap is feasible for experienced DIYers with plumbing knowledge. However, professional installation is strongly recommended for:

• Any project requiring plumbing modifications beyond basic connections
• Walk-in tubs (warranty often requires professional installation)
• Freestanding tubs with floor drain relocation
• Situations where building permits are required

Tips for a Smooth Replacement

1. Measure the doorways, hallways, and bathroom opening before purchasing to ensure the new tub can physically fit through
2. Order the tub 2–3 weeks before the planned installation date to avoid delays
3. Have a plumber inspect the existing plumbing before demolition day
4. Plan for at least one day without a usable bathroom and make alternative arrangements
5. Upgrade shut-off valves and supply lines while the walls are open