Cost to Replace a Bathtub with a Walk-In Shower in NH
What to Expect in 2026Compare real costs, timelines, and accessibility benefits of tub conversions versus custom walk-in showers.
Average Costs for Standard Conversions vs. Custom Showers
Unused bathtubs take up valuable real estate and create unnecessary tripping hazards. If you are planning to update your New Hampshire bathroom this year, replacing an old tub is the single best way to modernize the space and improve daily safety. However, the cost of this project varies drastically depending on whether you choose a straightforward conversion or a fully custom, barrier-free build. Here is exactly how the investments and timelines break down.
Tub-to-Shower
A budget-friendly design that replaces your existing bathtub with a new shower unit directly inside the exact same footprint. It utilizes your existing drain and plumbing layout to keep labor costs down.
Custom Walk-In Shower
A premium, barrier-free tile design unrestricted by the layout or footprint of your old bathtub. It features heavy frameless glass enclosures and an optional zero-threshold, curbless entry.
Itemized Cost Breakdown for a New Shower Installation
Understanding exactly how your bathroom remodeling budget is allocated helps prevent unexpected expenses. Total project costs are split between site preparation, licensed plumbing labor, structural waterproofing, and finish materials. The table below outlines the typical 2026 cost ranges for individual line items in New Hampshire, comparing a standard tub-to-shower conversion with a custom walk-in tile build:
|
Cost Category |
Standard Conversion |
Custom Tile Build |
|---|---|---|
|
Demolition & Site Preparation |
$800 – $1,200 |
$1,200 – $2,000 |
|
Plumbing & Drain Alignment |
$1,500 – $2,500 |
$3,500 – $5,500 |
|
Waterproofing & Substrate Framing |
$1,000 – $1,500 |
$2,500 – $4,000 |
|
Shower Base & Wall Materials |
$3,500 – $5,500 (Ensemble Base) |
$5,000 – $8,500 (Tile Wall Upgrade) |
|
Glass Enclosures & Trim Hardware |
$1,200 – $2,300 (Standard Trim) |
$2,800 – $5,000+ (Frameless & 2-Function) |
|
Total Estimated Investment |
$8,000 – $14,000 |
$15,000 – $25,000+ |
The primary variables driving these price differences are specialized labor hours and material choices. A standard conversion utilizes pre-fabricated acrylic or composite components that install quickly over existing plumbing lines. In contrast, a custom walk-in shower requires an integrated waterproofing system, mud-bed or sloped floor pan installation, meticulous tile setting, and custom-fabricated frameless architectural glass. Because every bathroom footprint is unique, these figures serve as local project averages and actual contract pricing varies based on final material selections and your home’s specific structural conditions.
Main Factors That Affect Tub-to-Shower Replacement Pricing
When calculating an estimate to remove your tub and install a shower, three major factors determine where your project falls on the pricing spectrum.
1
Plumbing Modifications: Keeping your plumbing in the exact same spot keeps costs low. Relocating a drain or adding features like dual showerheads increases labor hours.
2
Enclosure Types: Standard shower curtains are highly cost-effective, while custom-cut, heavy frameless glass doors require specialist installation but offer a premium look.
3
Tile & Waterproofing: Moving from standard surrounds to full custom tile work requires meticulous waterproofing systems (like Schluter) and precision labor.
Structural Renovation Challenges in Older New Hampshire Homes
Converting a tub in a modern home is straightforward, but older New Hampshire homes—especially historical properties in towns like Exeter, Portsmouth, or Concord—present unique structural challenges that affect your timeline and budget.
Outdated Plumbing
Older homes often require replacing outdated galvanized steel or lead pipes with modern PEX plumbing before a new shower can be safely installed.
Unlevel Floor Joists
Over decades, older homes settle. To install a flawless, leak-free tile pan or a true curbless entry, floor joists often must be sistered and leveled structurally.
Subfloor Water Damage
Hidden leaks around old tub drains frequently rot out subfloors. Budgeting for minor subfloor remediation ensures a structurally sound foundation for your new tile.
Walk-In Shower Safety and Accessibility Upgrades
If your primary goal for removing your bathtub is long-term safety, the layout can be customized with specific accessibility features that protect your investment:
Curbless Entry
Recesses the shower pan into the floor joists to eliminate the threshold entirely, allowing seamless walk-in or roll-in access.
Secure Grab Bars
Heavily anchored into structural wall blocking to provide stable, reliable support exactly where you need it most.
Built-In Seating
Custom tiled corner benches or space-saving, fold-down teak seats designed safely for maximum daily comfort.
Handheld Systems
Installed on adjustable vertical slide bars for total water control and flexibility when bathing while safely seated.
Step-by-Step Tub-to-Shower Conversion Timeline
Day 1: Demolition
Our crew protects your home’s flooring, systematically tears out the old tub alcove, inspects the exposed studs, and clears away all debris.
Day 2: Plumbing
We relocate your drain lines, upgrade structural framing as needed, and install your new premium shower valves and water supply connections.
Days 3-4: Tile Work
This phase covers advanced Schluter waterproofing, base installation, and meticulous layout, setting, and grouting of your custom tile surrounds.
Day 5: Clean & Glass
We mount custom frameless glass doors, install secure safety features, hook up hardware fixtures, and complete our final walkthrough and clean.
Ready to Remove Your Old Tub?
Stop stepping over that dangerous, unused bathtub. Our expert team at NH Bath Builders specializes in both efficient tub conversions and luxury, accessible walk-in designs. We will evaluate your space and provide a transparent, 2026 estimate tailored to your goals.