Design & Cost Guide · San Francisco

Small Bathroom Remodel Ideas & Costs for San Francisco Row Houses

By Solid Bay Construction SF | Updated 2026

Many SF row houses have a single full bathroom under 40 square feet, wedged between bedrooms with no room to expand. You can't always add square footage — but you can make a small bathroom function and feel far bigger than it is.

Design Strategies That Actually Work in Small SF Bathrooms

Replace the tub-shower combo with a curbless shower

Removing a bulky tub in favor of a curbless, glass-enclosed shower visually opens the room and eliminates the tightest pinch point in a small bathroom. It requires careful floor slope and waterproofing — worth doing right the first time.

Wall-hung vanities and toilets

A wall-mounted vanity and toilet leave the floor visible underneath, which reads as more square footage than it actually is — a simple trick that makes a big visual difference in rooms under 5x8 feet.

Large-format tile, fewer grout lines

Large-format porcelain tile on both floor and walls, in a single continuous material, removes the visual clutter of multiple transitions and grout lines that make small rooms feel busy.

Recessed storage instead of surface-mounted

Niches built into the wall cavity (rather than surface-mounted shelving or medicine cabinets) recover storage without eating into usable floor space.

What It Costs

A small bathroom remodel in an SF row house typically runs $30,000–$60,000 — on the lower end of the citywide $35,000–$90,000 primary bathroom range, since the smaller footprint means less material and fixture cost, even though labor efficiency doesn't scale down as much as square footage does.

What Doesn't Change With Size

Regardless of the bathroom's size, plumbing and electrical work in an SF row house — especially one with original galvanized pipe or knob-and-tube wiring nearby — still requires the same permitting and inspection process as a larger bathroom. Small doesn't mean simple when it comes to code compliance.