California Bathroom Remodeling Code Requirements Every Homeowner Should Know

Getting ready to remodel your bathroom? Before you pick out tile or fixtures, it’s important to understand the state’s building regulations. In this guide, we’ll outline the California bathroom remodeling code requirements every homeowner should know.

Why Code Compliance Matters in Bathroom Renovations

Building codes aren’t just red tape. They are in place to protect your investment and ensure your bathroom is safe, efficient, and up to standard for years to come. Overlooking code requirements can result in failed inspections, damage to your home, and safety risks for your family.

At California Bathroom & Kitchen Remodelers, we take code compliance seriously. Our team stays current with evolving state and local regulations, so you can feel confident that every aspect of your renovation meets or exceeds the latest standards. Ready to learn what codes can trip you up during a remodel? Read on!

Ventilation: Keeping Air Clean, Safe, and Fresh

Proper ventilation helps control moisture, prevent mold, and protect against offensive odors. Here are the ventilation requirements outlined in the 2024 California Mechanical Code:

• Every bathroom must have a mechanical exhaust fan that vents directly to the outside (not into an attic or crawl space).

• Bathroom exhaust fans must be capable of moving at least 50 cubic feet of air per minute, even if the bathroom has a window.

• The exhaust vent must terminate at least three feet away from any doors, windows, or property lines.

Waterproofing and Plumbing: Leak Prevention, Mitigation, and Scald Safety

Effective waterproofing and proper plumbing are essential to prevent water damage, protect structural integrity, and ensure your bathroom remains safe over time. Here are some important requirements outlined in the 2024 California Plumbing Code:

• All joints where plumbing fixtures meet walls or floors require seals to prevent leaks and water damage.

• Showers and tubs must have pressure-balanced valves set to a maximum water temperature of 120°F for safety.

• Tempered safety glass is a requirement for any glass used near showers, tubs, or other areas exposed to hot water.

• Toilets and bidets must have at least 30 inches of total clearance, with a minimum of 24 inches of open space in front.

• Fixtures must meet the following maximum flow rates: 1.28 gallons/flush for toilets, 1.2 gallons/minute for faucets, and 1.8 gallons/minute for showerheads.

Electrical Safety: GFCI and Modern Lighting

Bathrooms present unique electrical challenges due to their confined space and constant exposure to water. For this reason, California’s Building Code and Energy Code (Title 24) include strict requirements for circuits, outlets, and lighting.

• A dedicated 20-amp bathroom circuit.

• GFCI-protected outlets installed in locations within three feet of the sink.

• Damp-rated lighting fixtures with solid lenses for showers and tubs.

• High-efficiency light fixtures, with at least one controlled by an energy-saving switch.

Accessibility: Making Your Bathroom Work for Everyone

Most single-family bathroom remodels don’t require accessibility improvements, but adding ADA‑compliant features can be a smart investment. These design choices make daily life easier for residents and house guests, support aging in place, and attract future buyers:

• Wide doorway entrances (32″ minimum) with low or no threshold.

• Curbless shower with integrated bench.

• Grab bars to aid movement to the toilet and shower.

• Comfort-height toilet (17–19″ seat height) with adequate side clearance.

• Lever-style door and faucet handles.

• Handheld showerhead slide bar that is reachable from a seated position.

Bay Area Experts in California Code Compliant Bathroom Renovations

Now that we have explored the California bathroom remodeling code requirements every homeowner should know, it’s time to partner with a team that follows them correctly from day one. At California Bathroom & Kitchen Remodelers, we manage every step of your remodel so you can enjoy luxurious, fully compliant bathrooms without the stress or guesswork of preparing for the inspection process.

Reach out to California Bathroom & Kitchen Remodelers at 408-360-9700 to book your free consultation with our bathroom renovation team. Wondering if there are any other California remodeling code requirements you should know? Contact us online.

Proudly serving homeowners in Almaden, Campbell, Cupertino, Los Altos, Los Altos Hills, Los Gatos, Mountain View, San Jose, Santa Clara, Saratoga, and Sunnyvale.