Everything You Need to Know About a Zero-Entry Shower

By Daniel Ptak, Master Plumber & Founder, Century Bathrooms & Kitchens

At-home falls are among the most common reasons Americans visit the emergency room, and most occur on the bathroom floor. A zero-entry shower is one of the most effective changes a homeowner can make to prevent it.

I’ve been installing barrier-free showers across Northern Virginia for over 25 years, and demand has grown steadily. Not just from older homeowners, but from anyone who wants a bathroom that’s cleaner, more open, and built to work for them at every stage of life. This guide covers everything you need to know: what zero-entry showers actually are, what they cost here in the DC metro, and the waterproofing details most contractors skip over (and then get called back to fix).

What Is a Barrier-Free Shower?

A barrier-free shower is exactly what it sounds like. The shower floor sits at the same level as the bathroom floor, with no curb, lip, or threshold to step over. You walk straight in. The tile runs continuously from the bathroom floor into the shower, with a precise slope toward the drain that helps contain water.

You’ll see several terms used interchangeably across the internet, including zero-entry, curbless, barrier-free, and no-threshold, all of which refer to the same design concept. Some manufacturers use “roll-in shower” when the unit is specifically designed for wheelchair access. 

A traditional curbed shower contains water passively, so the curb acts as a dam. Remove the curb, and you’re relying entirely on slope, drain placement, and waterproofing to do the same job. Done right, a curbless shower is just as watertight. Done wrong, it’s the source of the most expensive callbacks we get called in to fix.

Why Northern Virginia Homeowners Are Choosing Zero-Entry Showers

Accessibility is the most common reason, but it’s not the only one.

• The look: A curbless shower with large-format tile and frameless glass makes a bathroom feel significantly larger. In the older homes we work on throughout Fairfax and Arlington, where master baths tend to run smaller than current standards, this visual expansion matters.
• Ease of cleaning: No curb means no grout-trapped grime at the threshold. You can sweep water straight to the drain. For homeowners who are tired of scrubbing that ledge, this alone is worth it.
• Resale appeal: In the DC-metro market, accessible design features increasingly add value rather than signal decline. Buyers see a curbless shower and think “modern,” not “medical.”
• Multigenerational households: We do a lot of work for families with elderly parents moving in, or homeowners recovering from knee or hip surgery who need temporary accommodations that turn into permanent upgrades. A curbless shower works for everyone in the house.

Benefits of a Walk-In Shower for Elderly Adults

If you’re planning a bathroom remodel with the next 10–20 years in mind (or helping an aging parent stay in their home), a walk-in shower is one of the highest-impact changes on the list.

What a good aging-in-place shower design looks like:

• Floor-level entry with no transition strip or height change
• Slip-resistant tile (look for a DCOF rating of 0.42 or higher for wet surfaces)
• Built-in bench at a comfortable sitting height (17–19 inches)
• Grab bars at the entry, side wall, and near the showerhead
• In-wall blocking roughed in during the remodel, so additional grab bars can be added later without opening the walls
• Comfort-height fixtures and lever-style handles, which are easier to operate with limited grip strength
• Handheld showerhead on a slide bar, plus a fixed overhead
• Linear drain running along the entry wall, which allows a more gradual slope and makes the floor safer to walk on

The Drawbacks of a Zero-Entry Shower

• Water on the bathroom floor: This is the most common concern, and it’s legitimate. Without a curb, water can escape if the slope is wrong, the drain is undersized, or the showerhead is pointed the wrong way. There’s a simple solution, though, which is to make sure there’s an adequate floor slope (typically ¼ inch per foot toward the drain), a correctly sized drain, and in some cases a linear drain running along the entry wall that catches water before it exits.
• Higher cost: Curbless showers cost more than curbed ones. The structural work involved, such as lowering the floor or building a recessed pan and reinforcing joists in older homes, adds labor and materials that a simple curb-and-pan installation doesn’t require. We’ll get into specific numbers in the cost section.
• Structural complexity: In many of the older Fairfax and Arlington homes we work in, there isn’t enough floor depth to recess the shower without opening up the subfloor. This is solvable, but it needs to be scoped and priced correctly before the demo starts. Contractors who don’t flag this upfront are the ones whose projects go sideways.

Why Most Curbless Showers Fail

A curbless shower has no passive water containment. Everything depends on slope and waterproofing. Get either one wrong and water migrates under the tile, into the subfloor, and eventually into the structure below. By the time a homeowner notices a problem, the repair cost is usually several times what the installation would have cost if it had been done right the first time.

Pre-slope vs. final slope

The floor beneath a curbless shower isn’t flat. It has two separate slopes built into it: a pre-slope that runs from the walls to the drain beneath the waterproofing layer, and a final slope that the tile sits on. Both have to be precise. If either is off — even slightly — water pools in the wrong place and eventually finds a way out of the system.

Membrane systems

The pre-slope gets covered with a waterproofing membrane before the tile goes down. The systems I use most often, Schluter Kerdi and Laticrete Hydro Ban, are both highly reliable when installed per spec. Kerdi is a sheet membrane that bonds directly to the substrate; Hydro Ban is a liquid-applied system that goes on with a brush or roller. Both work. The failure I see most often stems from poor execution, such as missed corners, seams that weren’t properly overlapped, and curb-to-floor transitions that weren’t fully sealed.

Linear drains

A center-point drain in a curbless shower requires the floor to slope toward it from all four sides. That works, but it creates a crowned floor that can feel slightly uneven underfoot. A linear drain running along the entry wall or one side wall requires slope in only one direction, which is easier to execute cleanly and makes large-format tile much more practical. For aging-in-place applications, especially, a more planar floor is also safer.

Safe and Stylish Walk-In Shower Ideas for Elderly Users

Frameless glass

A frameless glass enclosure (either a fixed panel or a hinged door) keeps the visual openness of a curbless design intact while containing steam. The less hardware, the cleaner the look.

Large-format tile

Fewer grout lines, a more contemporary aesthetic, and, in a properly sloped installation, a more planar floor surface.

Built-in bench

A floating bench tiled to match the shower walls is both functional and elegant. For aging-in-place applications, you’ll want to take bench height into consideration. 17 to 19 inches is the comfortable range for most adults.

Recessed niches

Built into the wall during framing, a recessed niche eliminates the clutter of corner caddies and keeps the visual plane clean. We always recommend adding at least one during a full remodel, as it’s much easier to rough in during construction than to add later.

Wet-room layout

A full wet room extends the curbless concept to the entire bathroom. This is less common but works beautifully in primary baths with the right footprint. It’s also the most demanding installation in terms of waterproofing.

Accessibility Features That Complete the Picture

A barrier-free shower is just the foundation. These additions make it fully functional for someone with changing mobility, and add comfort for everyone else.

• Grab bars: The placement matters as much as the presence. A grab bar at the shower entry (to stabilize the step-in), one on the side wall at a height that aids sitting and standing, and one near the showerhead are the standard three. All of them require blocking in the wall — either standard 2x blocking or a full backer board panel behind the tile. This needs to happen during the remodel, before the walls are closed. Adding grab bars to a finished shower without backing means anchoring into studs only, which limits placement significantly.
• Comfort-height toilet: While we’re in the bathroom, if aging in place is the goal, a comfort-height toilet (17–19 inches versus the standard 15) makes an enormous difference for people with limited knee or hip mobility. It’s a straightforward swap on any remodel.
• Slip-resistant tile: Not all “non-slip” tile performs the same. Look for a Dynamic Coefficient of Friction (DCOF) of 0.42 or higher for wet applications. This can be achieved with smaller tiles and more grout lines (which increases traction), textured tile surfaces, or anti-slip treatments applied to smooth porcelain.
• Lever or touchless controls: Standard round knobs are difficult to operate with arthritic hands. Lever-style handles require no grip.

What Does a Zero-Entry Shower Cost in Northern Virginia?

Costs vary significantly depending on the scope of structural work required, materials, and the specific configuration. Every shower we build is fully customizable, so the features listed in each tier are a starting point, not a ceiling. That being said, here’s a rough framework for the NoVA market:

• Entry-level (smaller to medium shower, minimal structural work): $8k – $11k

• • • A straightforward curbless conversion in a bathroom where the floor depth allows it, with quality tile, a point drain, custom glass, and recessed niches. 

• Mid-range (medium shower, moderate structural work): $11k – $18k

• • Includes subfloor work in an older Fairfax or Arlington home, a linear drain, frameless glass, quality large-format porcelain, a built-in bench, recessed niches, and LED recessed lighting. 
• High-end (large to very large shower, premium finishes): $18k – $24k+
  • Gauged porcelain panels, Schluter or similar system throughout, built-in bench, LED lighted niches, recessed lighting, smart/electronic shower system, multiple showerheads with a multi-function configuration, and premium fixtures throughout. 

What drives cost up in NoVA specifically:

• Older housing stock: Homes built pre-1990 in Fairfax and Arlington often don’t have floor cavities deep enough for a proper curbless installation without structural modification.
• Permitting: Structural changes to a shower typically require a permit in Fairfax County, Loudoun County, and Prince William County. We pull permits on every job that requires them. Factor this into your budget.

Will Medicare Pay for a Walk-In Shower?

Generally, no; however, there are legitimate avenues worth exploring.

For example, Standard Medicare (Parts A and B) does not typically cover home modifications like shower conversions, even when medically recommended. Medicare covers medical treatment, not home improvement.

That said, there are alternatives, including: 

• HSA/FSA funds: If your doctor documents the modification as medically necessary, Health Savings Account or Flexible Spending Account funds may be applicable. Check with your plan administrator and a tax advisor.
• VA benefits — HISA Grant: Veterans with service-connected disabilities may qualify for the VA’s Home Improvement and Structural Alterations (HISA) grant, which provides up to $6,800 for medically necessary home modifications. This is one of the most useful and underused programs we see.
• Medicaid waivers: Some state Medicaid programs (including Virginia’s) offer home and community-based waiver programs that can fund accessibility modifications. Eligibility is income- and needs-based.
• Medical tax deductions: The IRS allows deductions for home modifications that serve a medical purpose, to the extent that the cost exceeds any increase in home value. Consult a tax professional.
• Long-term care insurance: Some policies cover home modification costs. Review your policy language carefully.

Coverage rules change, programs have waiting lists, and eligibility varies by individual circumstance. We’re bathroom contractors, not benefits advisors, so always verify with a licensed professional or a nonprofit housing counselor.

Plan Ahead vs. Retrofit Later

The single best time to build a curbless shower is during a planned remodel you’re already doing for other reasons. 

Retrofitting a curbless shower into a finished bathroom that was never designed for one means paying for demo, structural modification, waterproofing, and rebuild all at once, with no other work to amortize those costs against. It also means a bathroom out of commission for a longer period.

The families who plan ahead spend a fraction of what a reactive retrofit costs at 75. CAPS-trained designers call this “visitability planning,” and it’s exactly the kind of thinking that shapes how we approach aging-in-place projects.

Other Frequently Asked Questions

What is a zero-entry shower?

A zero-entry shower has no curb, lip, or threshold, so the shower floor is level with the bathroom floor, and water drains through a precisely sloped surface. 

Is a zero-entry shower the same as a barrier-free or curbless shower?

Yes. Zero-entry, curbless, barrier-free, and no-threshold all describe the same design: a shower with no curb and a floor-level entry. “Roll-in shower” is a specific term used when the unit is designed to allow wheelchair access with an adequate turning radius.

Are walk-in showers a good choice for elderly homeowners?

A barrier-free, walk-in shower for elderly homeowners is always a great choice. Curbless entry eliminates a common trip hazard, and when paired with a built-in bench, grab bars, slip-resistant tile, and a handheld showerhead, can comfortably accommodate a walker or wheelchair. Planned correctly, a walk-in shower provides decades of safe use without ever needing modification.

Do zero-entry showers leak or let water onto the bathroom floor?

No, properly installed zero-entry showers do not leak onto the bathroom floor. Water containment relies on adequate floor slope toward the drain (typically ¼ inch per foot), a correctly sized and positioned drain, and a properly installed waterproofing membrane below the tile. Failures occur when any of those elements are executed incorrectly.

What size does a curbless shower need to be?

The practical minimum for a functional curbless shower is 36″×36″, though 42″×60″ is a more comfortable footprint and the common starting point for aging-in-place applications. ADA guidelines for a roll-in shower require a 36″×36″ minimum with a 60″ turning radius nearby, or a 36″×60″ transfer shower. Larger is almost always better — especially if wheelchair access is a consideration.

How much does a zero-entry shower cost in Northern Virginia?

A zero-entry shower costs, on average, anywhere from $8k to $24k+, with costs varying based on structural complexity, materials, and configuration. Key cost drivers include subfloor work in older homes, linear vs. point drain, frameless glass, and county permitting fees. See our full Bathroom Remodel Cost Guide for detailed pricing context. 

Do I need a permit for a barrier-free shower in Fairfax County?

Usually yes, but especially if the project involves structural modifications, such as lowering the floor, altering joists, or changing the plumbing drain configuration. Fairfax County, Loudoun County, and Prince William County all require permits for this type of work. Century pulls permits on every project that requires them. Working without a permit on a structural bathroom modification creates liability issues and can complicate a future home sale.

Ready to Start Planning?

A no-threshold shower done right is a significant project. Not because it’s complicated, but because every detail matters. The slope has to be right. The waterproofing has to be right. The structural work, if it’s needed, has to be scoped and priced honestly before demo starts.

If you’re thinking about a curbless shower for aging in place, for a full primary bath remodel, or just because you’re tired of stepping over that curb, we’d like to be the first call you make.

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