Bathroom Remodeling in Houston: 2026 Costs, the 1,024 sq in Shower Rule and Permits

What a bathroom remodel costs in Houston

The table takes national remodeling costs and applies the Houston factor of 0.82 from the U.S. Army Corps of Engineers Area Cost Factors.

Estimates for 2026, including labor and standard parts. Houston prices use the metro's construction cost factor of 0.82 (US average = 1.00) from the U.S. Army Corps of Engineers Area Cost Factors. Your quote depends on access, materials and the condition of the home.

Angi's local data gives a second view, by room size (Angi):

That works out to $70 to $250 per square foot. Angi's material ranges show where the spread comes from: tile from $2 to $50 per square foot, vanities from $40 to $4,000, a walk-in shower from $500 to $6,000 and a tub from $230 to $15,000.

What moves a Houston bathroom budget

• Moving the drain. Slab foundations are common in Houston, and on a slab, moving a toilet or shower even a few feet means cutting concrete and trenching to the drain line.
• The shower size rule. Turning a small tub alcove into a code-sized walk-in shower can mean moving a wall.
• The shower pan. A tiled shower needs a lined, sloped pan and a flood test, which is labor you pay for whether you see it or not.
• Ventilation. A fan that has to be ducted to the outside, not into the attic, takes a roof or wall penetration.

Run your own numbers in the calculator, or see national prices in our bathroom remodel cost guide.

Houston shower rules

The City of Houston adopted the 2021 International Residential Code with its own amendments, and several of them change how a shower is built (Houston Residential Code 2021, Chapter 27).

Size

A shower in Houston must have at least 1,024 square inches of floor area inside the finished walls and at least 30 inches in its narrowest direction. The model code most other places use asks for 900 square inches, so a 30 by 30 inch stall that passes elsewhere falls short here. A 32 by 32 inch shower, at 1,024 square inches, is the smallest square that works.

There is a useful exception for tub-to-shower conversions. When you replace a standard 30 by 60 inch bathtub with a shower, the shower may be as narrow as 25 inches if its area is at least 1,300 square inches. That lets a shower fit the old tub alcove.

What else the inspector checks

• Doors. Hinged shower doors must open outward, and the entry needs a clear opening of at least 22 inches.
• Valves. Shower and tub-shower valves must be pressure-balanced, thermostatic or a combination of the two.
• Glass. Glass in a shower or tub enclosure, or in a wall next to one with its bottom edge under 60 inches above the floor, must be safety glazing (2021 IRC R308.4.5).
• Wall backer. Tile in tub and shower areas must go over a backer board listed in the code (2021 IRC R702.4.2), not ordinary drywall.
• The pan test. Houston requires every shower receptor to be tested by filling it with water up to the rough threshold, with the test plug placed so both sides of the subpan are tested.

Ask your remodeler how they handle the flood test and whether the inspector sees it before tile goes on.

Fans, humidity and mold

A Houston bathroom works hard against moisture. Bush Intercontinental averages 111.3 days a year at 90°F or hotter, based on NOAA normals for 1991 to 2020, and a steamy shower adds to the load.

Code sets the minimum. A bathroom without an openable window of at least 3 square feet needs electric light and an exhaust fan (2021 IRC R303.3). The fan must move at least 50 cubic feet per minute if it runs on a switch, or 20 if it runs continuously, and it must exhaust directly outdoors, never into the attic (2021 IRC M1505). An old fan that blows into the attic is worth fixing during any remodel.

If demolition turns up mold, Texas sets a size line. TDLR requires a licensed remediation contractor and a $25 state notification when mold covers 25 contiguous square feet or more. Owners of buildings with fewer than 10 units can clean their own property, and TDLR stresses that stopping the moisture source matters more than the type of mold (TDLR).

Texas water-saving fixture rules

Texas law limits the water use of every toilet, faucet and showerhead sold in the state. Under Health and Safety Code 372.002 (Texas Legislature):

Houston's code amendments use the same numbers, and they count a hand-held spray as a showerhead. If you want a rain head plus a hand shower, each one must meet the limit. Houston's water is moderately hard on most of the city's Main System, averaging 110 ppm in 2024 (Houston Water), so pick fixtures with aerators and spray nozzles that are easy to clean.

Planning for aging in place

While the walls are open, plan for the years ahead. Houston's code amendments include a visitability appendix that describes features for a mobility-impaired visitor, such as a bathroom door with at least 32 inches of clear opening (Appendix AV of the Houston amendments). Use it as a checklist even if your project does not require it.

Other features to plan in the walls while they are open:

• Blocking behind the tile for grab bars at the toilet and in the shower
• A curbless or low threshold shower, where the slab and drain allow it
• A fold-down seat, which Houston allows as long as the shower keeps 1,024 square inches with the seat up
• A hand shower on a slide bar, within the 2.5 gpm limit
• Lever handles and a comfort height toilet

Do you need a permit?

It depends on what you touch. Houston's Residential Permitting 101 needs no building permit for tile, cabinets, countertops or paint, or for drywall repair up to 100 square feet (Houston Permitting Center). Swapping a vanity top and retiling a floor usually stays permit-free.

Plumbing changes, new fixtures, moved walls and new circuits do need permits. Plumbing permits must be bought by a Texas licensed master plumber registered with the city, and electrical permits by a registered master electrician. The 2026 fees are small next to the job: plumbing fixtures cost $34.24 for the first three and $11.41 each after that, with a $97.56 minimum, and the administrative fee is $33.56 (2026 fee schedule). A residential remodel permit that needs plan review takes 1 to 15 business days to process (Houston Permitting Center).

Katy, Sugar Land, Pearland, Pasadena and Conroe run their own permit offices, and in The Woodlands, alterations to a home need written approval from the village design review committee first.

Floodplain homes and flood repairs

If your house is in a mapped floodplain, Houston requires water-resistant materials below the design flood elevation. If the bath is part of a larger remodel, check the total, because the whole project counts toward the city's 50% substantial improvement test, which can require the whole house to meet floodplain rules (Houston Permitting Center). See our Houston general contractor guide for how that test works.

For homes built before 1978, any paid crew that disturbs painted surfaces must follow EPA's lead-safe rules (EPA).

How long a bathroom remodel takes in Houston

The length of the job depends on scope and how quickly you make selections, so ask each remodeler for a written schedule. The order of work is the same on almost every Houston bathroom:

A refresh with no permit skips the permit and rough inspection stages, which is why it is the fastest kind of bathroom job.

Areas we cover

GOLDGCP bathroom remodelers work across greater Houston:

• Houston
• Katy
• Sugar Land
• The Woodlands
• Pearland
• Pasadena
• Cypress
• Conroe

Enter your ZIP code to see bathroom remodel prices for your area and get matched with a local remodeler.