Curbless Showers and Aging-in-Place Bathrooms

What is a curbless shower?

A curbless or zero-threshold shower has no curb to step over. The bathroom floor continues into the shower, and the shower floor slopes gently to a drain, often a linear drain along one wall. Without a curb, the shower is easier to enter, safer for anyone with limited mobility, and accessible with a shower chair or walker.

How curbless showers are built

The challenge is keeping water inside the shower without a curb. That usually means lowering, or recessing, the subfloor in the shower area so the floor can slope to the drain while staying level with the rest of the bathroom. On a slab, this can involve cutting and reshaping the concrete. On a wood-framed floor, joists may need to be modified or reinforced. A continuous waterproofing membrane covers the floor and extends beyond the shower area.

• Recessed or re-sloped subfloor
• Linear or center drain sized for the shower
• Continuous waterproofing over the floor and walls
• Properly placed glass panel to control spray
• Slip-resistant floor tile

What the data says

Cost vs Value 2025 tracks a universal design bathroom remodel in the Atlanta market, including features such as a zero-threshold shower, grab bars and wider doors. It cost $41,047 and recovered 66.7 percent at resale.

What affects the cost

Other aging-in-place upgrades

• Blocking in walls for future grab bars, even if bars are not installed now.
• A handheld shower on a slide bar.
• A built-in or fold-down shower bench.
• Comfort-height toilets.
• Wider doorways and lever-style door handles.
• Better lighting, including night lighting.
• Slip-resistant flooring throughout the bathroom.

Who benefits

Curbless showers are not only for older homeowners. They are easier for families with young children, guests with injuries, and anyone carrying laundry or cleaning supplies. Many homeowners in Alpharetta choose them simply for the open, modern look.

Planning tips

• Inspect the floor structure before committing to a design.
• Plan the drain location early because it drives the floor slope.
• Use a glass panel or shower layout that keeps spray inside.
• Choose floor tile that is rated for wet areas and slip resistance.

Permits

Moving drains, altering floor framing and adding circuits typically require permits and inspections. Your contractor should confirm requirements with your city.

Frequently asked questions

Will water get on the bathroom floor? Not if the floor is sloped correctly and the glass is placed well. A linear drain at the entry side can help.

Can any bathroom get a curbless shower? Most can, but the floor structure determines how complex it is. We check this during the estimate.

Planning for every stage of life

Alpharetta's housing stock is largely from 1980 to 2009, and many owners plan to stay for the long term. With a median owner-occupied home value of about $649,000 according to U.S. Census Bureau data, adapting a home you already own often makes more sense than moving. A bathroom is the most important room to get right for long-term living.

Design details that make a difference

• Shower controls placed near the entry so water can be adjusted before stepping in.
• A bench at a comfortable height.
• Contrasting colors at floor edges for better visibility.
• Night lighting from the bedroom to the bathroom.
• Enough clear floor space to turn around easily.

Tile and slip resistance

Smaller floor tiles with more grout lines offer more grip in the shower. Larger tiles look sleek but need careful slope planning. Ask about slip-resistance ratings when selecting floor tile for wet areas.

Key takeaways

• Curbless showers need a recessed or re-sloped floor and continuous waterproofing.
• In Atlanta, a universal design bath remodel cost $41,047 and recovered 66.7 percent in Cost vs Value 2025.
• Grab-bar blocking is inexpensive during a remodel and valuable later.
• Second-floor bathrooms can require joist work, so inspect before designing.
• A well-placed glass panel and correct slope keep water in the shower.

Frequently asked questions (continued)

Is a curbless shower harder to clean? Usually easier, since there is no curb and often fewer edges. Large-format wall tile reduces grout lines.

Can I add grab bars that look good? Yes. Many grab bars now double as towel bars or shelves and come in finishes that match other fixtures.

Who to involve in planning

For homeowners with specific mobility needs, an occupational therapist can recommend grab bar locations, bench heights and clearances tailored to the people who will use the bathroom. Bringing those recommendations to the design stage avoids costly changes later.

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