Small bathroom and half bath remodels in San Antonio
Most bathrooms in San Antonio's older neighborhoods are small: a 5 by 8 foot hall bath with every fixture on one wall, or a powder room under the stairs. In a room that size, every inch gets planned. Tell us about the room and a local remodeler calls you back.
On this page
Where small bathrooms are
17% of homes in the San Antonio ZIP codes we cover were built before 1960, when a single small bathroom was standard (Census ACS 2020-2024). In 10 city ZIP codes, most homes are that old. ZIP-by-ZIP data.
Ideas that work in a small room
- Keep the plumbing wall. Leaving every fixture on the same wall saves the most money.
- Swap the tub for a shower with clear glass, so the room reads larger. Conversions.
- A wall-mounted or narrow vanity leaves floor showing and makes cleaning easier.
- Large tile, light grout. Fewer lines make a small floor look bigger.
- A recessed niche and medicine cabinet between the studs instead of shelves sticking out.
- A pocket door if the swinging door hits the toilet or vanity.
- An exhaust fan vented outside. Small rooms trap steam.
What it costs
| Job | Published range | Source |
|---|---|---|
| Bathroom remodel, typical project | $6,000 to $18,000, $12,000 average | Fixr, Jan 2026 |
| Cosmetic refresh (paint, fixtures, vanity) | $2,400 to $10,000 | Fixr, Jan 2026 |
| Half bath or powder room | $1,200 to $15,000 | Fixr, Jan 2026 |
National published ranges from Fixr, not a San Antonio average and not a quote.
What needs a permit
The city's No Permit Required list includes cabinets and countertops. Flooring and tiling are on it too, as are painting and drywall repair. A new vanity and tile on their own can skip the permit; moving a drain or adding a fan circuit cannot. Permit guide.
Questions San Antonio homeowners ask
How much does a half bath remodel cost?
Fixr puts a half bath or powder room at $1,200 to $15,000. A new vanity and toilet with fresh paint sits at the low end; moving fixtures or adding tile walls moves it up.
Can I add a shower to a half bath?
Sometimes, if there is room and a drain can reach it. That is new plumbing with a permit, and the room needs ventilation. Ask the remodeler to look at the space before you plan around it.
What is the smallest a full bathroom can be?
A common minimum is about 5 by 8 feet for a room with a tub. A shower-only bath can fit in a little less. Local code sets clearances around the toilet and in front of fixtures, which the remodeler should check.
Sources
- Fixr: How Much Does It Cost to Remodel a Bathroom (updated January 27, 2026)
- US Census Bureau American Community Survey 2020-2024 5-year estimates by ZIP Code Tabulation Area, via Census Reporter (tables B01001, B25003, B25034, B25035, B25077)
- City of San Antonio Development Services: No Permit Required list (fetched October 29, 2026)
- City of San Antonio Development Services: Residential Permits (fetched October 29, 2026)