Table of Contents
- A tub-to-shower conversion is mainly a waterproofing and plumbing job; the tile is what you see, the membrane and drain are what must not fail.
- 2026 planning ranges: shower wall tile $30-$80 per sq ft installed, waterproofing $3-$10 per sq ft, tile removal $4-$12 per sq ft.
- Co-ops and condos typically require an alteration agreement; plumbing changes may also require a licensed plumber and permit.
- Typical timeline is 3-6 weeks for a bathroom, with 1-2 weeks of tile work including waterproofing cure.
- Ask for a flood test of the pan before tile, and a written scope that names the membrane system.
Replacing a bathtub with a walk-in shower is one of the most common bathroom changes in New York. People want easier entry as they age, more floor room in a small bathroom or simply a shower they will actually use. The job looks simple on a rendering: remove the tub, install a shower. In practice it is a sequence of demolition, plumbing, waterproofing and tile in a very small wet space, and each step has a way to go wrong. This guide explains what is involved, what it costs as of October 2026, how co-op and condo rules affect it and how to avoid the failures that show up two years later as a stain on the ceiling below.
1. What a Tub-to-Shower Conversion Actually Includes
A conversion has five technical parts. Many bids blur them together, so it helps to see them separately.
- Demolition. Removing the tub, the surround tile or panels, and often the wall finish behind it. In older buildings this reveals plaster, lath, old plumbing and sometimes the subfloor.
- Plumbing. A tub drain sits in a different location than a shower drain, and a tub valve is at a different height than a shower valve. The drain may need to be relocated, the valve adjusted or replaced, and the trap and vent confirmed.
- Floor structure. A shower pan needs a sloped base. In a tub alcove, the floor framing and subfloor may need modification so the pan drains correctly.
- Waterproofing. A continuous membrane across the floor, curb and walls, flood-tested before tile is set.
- Finishes. Tile, grout, trim, a glass panel or curtain rod, and fixtures.
A conversion is not a tile job with a plumbing step. It is a waterproofing job that ends in tile.
Shower types to choose from
| Type | Description | Considerations |
|---|---|---|
| Curb shower | A raised threshold and glass panel or curtain | Simplest to build and waterproof |
| Low-threshold | A very low curb | Easier entry with slightly more build detail |
| Curbless | Floor slopes continuously into the shower | Requires recessed or modified subfloor; see curbless shower installation in an NYC apartment |
| Prefab base with tile walls | A manufactured pan with tiled walls | Faster and cheaper, with fewer design options |
2. 2026 Cost Build-Up for a Conversion
There is no honest single number for a tub-to-shower conversion, because the scope ranges from a prefab base and surround to a custom curbless tiled shower with relocated plumbing. Instead, here are the 2026 planning ranges for the building blocks, so you can check any quote against them. They are typical New York metro ranges, not quotes.
| Item | Typical 2026 planning range |
|---|---|
| Tile removal | $4-$12 per sq ft |
| Shower wall tile installed (standard porcelain or ceramic) | $30-$80 per sq ft |
| Floor tile installed | $20-$45 per sq ft |
| Waterproofing membrane system | $3-$10 per sq ft |
| Subfloor prep and leveling | $2-$8 per sq ft |
| Full bathroom renovation (all-in) | $30,000-$60,000+ |
Natural stone, large-format panels and mosaics cost more than the standard range, and small shower floors in mosaic tile take more labor per square foot.
An illustrative wall-area example
Take a typical alcove shower roughly 60 inches wide by 32 inches deep, tiled to 8 feet. The back wall is about 40 square feet and each side wall about 21 square feet, so the wall area is roughly 83 square feet, and the floor is about 13 square feet. At $30-$80 per square foot, wall tile alone would be approximately $2,500-$6,600. Waterproofing on walls and floor, about 96 square feet at $3-$10 per square foot, adds roughly $300-$960. Tile removal of an existing surround, say 50 square feet at $4-$12 per square foot, adds $200-$600. Plumbing, the valve and drain work, glass and fixtures come on top, along with permits if required. This is an illustration built from planning ranges, not a quote. It shows why the finished price depends far more on tile choice and plumbing scope than on the shower's footprint.
For a broader view, see Bathroom Tile Installation Cost in NYC, Tile Removal Cost in NYC and What Affects It and Tile Installation Cost in NYC (2026 Price Guide). The Bathroom Renovation Budget Planner lets you test a full-bathroom scope.
3. Waterproofing: Where Conversions Succeed or Fail
Most shower failures are not tile failures. They are water that got behind the tile.
What proper waterproofing looks like
- A sloped mortar bed or pre-sloped foam pan that drains toward the drain, not away from it
- A continuous membrane, either sheet or liquid-applied, carried up the walls and sealed at corners, niches, valve penetrations and the curb
- Proper drain flange integration so water at the membrane level can reach the weep holes
- A flood test of the pan, typically 24 hours or per the system manufacturer's instructions, before tile goes down
- Appropriate cure time before tile is set, which is part of why one bathroom's tile work often takes 1-2 weeks
What improper work looks like
- Cement board with tape and no membrane, relying on grout to keep water out
- Pans pitched incorrectly so water pools
- Membranes cut at the curb or at a niche corner
- No flood test
- Tile installed over a damp substrate
Grout and tile are not waterproof by themselves. Epoxy grout is more stain-resistant, and our guide to regrouting shower tile explains when maintenance is worth professional help. The tile is the finish; the membrane is the barrier.
Cutting tile and stone creates respirable silica dust. Professional crews use wet cutting or vacuum dust control as the OSHA silica standard requires, which matters in a small apartment bathroom with an adjacent kitchen and bedroom.
4. Why Hire a Licensed Pro for a Shower Conversion
This is a job where an inexpensive mistake becomes an expensive one months later. A handyman can install a prefab shower kit. The difference between that and a durable custom shower is knowledge of drains, slopes and membranes.
Risk you cannot see. A pinhole leak behind tile can run for months, damaging the ceiling below, a neighbor's apartment or your own subfloor. The cost of repairing a leak, a neighbor's insurance claim and a second renovation is many times the cost of building the shower correctly.
Licensed plumbing and permits. Where plumbing changes are involved, work is typically performed by a licensed plumber under the required filings. NYC requires a Home Improvement Contractor license from the Department of Consumer and Worker Protection for residential remodeling; the DCWP license checklist explains it. N.Y. Renovation Services is licensed and insured, and we encourage you to verify any contractor before signing.
Board paperwork. In co-ops and condos, N.Y. Renovation Services prepares the alteration package and manage board communication as part of the job.
One accountable team. The in-house design-and-build crew at N.Y. Renovation Services handles demolition, tile, waterproofing and finishing, so there is no gap between the plumber, the tile setter and the person who answers the phone.
Transparent pricing. Our contracts are itemized, with the membrane system, tile allowance and plumbing scope listed as separate lines. No hidden fees.
5. Co-op, Condo and Building Rules
A shower conversion changes a wet area, and boards pay close attention to wet areas.
What boards typically require
- An alteration agreement signed by the owner and approved by the board
- A written scope, sometimes with drawings from a registered design professional
- Certificates of insurance from the contractor naming the building and managing agent
- Work-hour limits, often weekday daytime only, and rules for elevator protection and debris removal
- Rules on waterproofing, and sometimes restrictions on relocating plumbing fixtures over neighbors' living spaces
Ask your managing agent for the alteration package before you finalize design. Industry reports state that the Department of Buildings reinstated, effective January 26, 2026, a board attestation inside DOB NOW: Build confirming that alterations are board-approved. This is reported information, so confirm the details with the DOB and your managing agent.
Our guide to what NYC renovations cost in 2026 explains how approvals and building rules feed into total budgets.
City permits
Alterations are filed through DOB NOW: Build by a New York State registered design professional. Work that does not change plumbing layout may require less; relocating drains or altering walls generally requires more. The DOB explains how to obtain a permit. Our page Do I Need a Permit? gives a plain-language overview.
6. Hazards in Older Bathrooms
Opening a bathroom in an older building often reveals material you want to know about before the first swing of the hammer.
- Asbestos: old floor tile, mastic, pipe wrap and some wall products in older buildings may contain asbestos. Testing before demolition is standard practice, and abatement must be performed by certified professionals when asbestos is present. We never assume a bathroom is clear.
- Lead: paint on walls and trim in buildings before 1978 may contain lead. Paid work that disturbs it falls under the EPA's RRP rule.
- Mold and rot: a leaking tub surround can hide wet insulation, mold and soft subfloor. The EPA's mold resources explain why moisture must be corrected before rebuilding.
If your bathroom was last renovated decades ago, budget for the possibility that the subfloor or wall framing needs repair once the tub comes out.
7. Step-by-Step: How a Conversion Is Built
- Decide the shower type and size. Curb, low-threshold or curbless; glass or curtain; niche, bench and fixture locations.
- Confirm rules and approvals. Board package, permits and scheduling.
- Test and demolish. Hazmat testing first; then remove the tub, surround and damaged substrate.
- Rough-in plumbing. Set the drain, adjust the valve, confirm venting and test the lines.
- Frame and slope the floor. Modify framing if needed and build the sloped base.
- Waterproof. Install the membrane across floor and walls, seal penetrations, flood-test the pan and allow cure time.
- Set tile and grout. Layout, cuts, thin-set and grout, with movement joints where needed.
- Install the valve trim, glass and fixtures. Final caulking and cleaning.
- Inspect and cure. Final inspections where required, and observe the grout and sealer cure before heavy use.
Our guide on how long bathroom tile installation takes explains the timing in detail, and the broader tile installation guide for NYC covers process and costs.
Typical timeline
| Phase | Typical time |
|---|---|
| Approvals and ordering | 1-6 weeks, depending on building |
| Demolition and plumbing | 3-7 days |
| Floor build and waterproofing, including cure | 3-7 days |
| Tile and grout | 1-2 weeks for one bathroom |
| Fixtures, glass and punch list | 3-7 days |
A full bathroom is commonly 3-6 weeks on site. Custom glass is typically measured after tile is set and may add days or weeks. Order it early.
8. Neighborhoods and ZIP Codes We Serve
Shower conversions look different depending on where you live. Here is how housing stock shapes the job in the areas we serve.
- Financial District, Manhattan (10004, 10005, 10006, 10038): office-to-residential conversions and high-rise condos. Loading-dock rules, freight scheduling and strict building requirements shape logistics. See Financial District kitchen and bath remodels.
- Dyker Heights, Brooklyn (11228): detached and semi-detached brick homes on large lots, where space allows a bigger shower and easier access for materials.
- Jamaica, Queens (11432, 11433, 11435): multifamily buildings, co-ops and mixed-use properties, where shared plumbing stacks and board rules govern.
- Port Richmond, Staten Island (10302): older wood-frame homes and two-families, where rot behind tub surrounds and old galvanized lines are common findings.
- Roslyn, Long Island (11576): the Village of Roslyn, with historic homes where village permits and original plaster and framing affect the work.
- Secaucus, New Jersey (07094): townhouses and condos, with Meadowlands flood considerations for lower-level bathrooms and NJ permit rules.
The differences are practical. In a Financial District tower the challenge is the building: dock schedules, elevator padding and a managing agent with a thick rulebook. In a Port Richmond two-family the challenge is the structure: old plumbing and soft framing. In Roslyn it is the village and the age of the house. In Secaucus, it is New Jersey's permit process and, for ground-level baths, water. A contractor who has done all of these understands which question to ask first, and you can ask us to review a bid you already have.
9. Common Mistakes to Avoid
- Relying on cement board and grout alone. Without a membrane, water reaches the framing.
- Skipping the flood test. It costs a day and prevents a disaster.
- Choosing tile before checking the plan. Large-format tile on a small sloped pan is hard to do well.
- Starting before board approval. A stop-work notice from the building costs more than the wait.
- Ignoring ventilation. Humidity damages new paint and grout, so confirm the exhaust fan is sized, ducted outside and wired to a switch you will actually use.
- Not asking about the membrane system by name. A quote that says "waterproofing" without a product or method is incomplete.
- Hiring on price alone. Compare scopes, not totals.
10. What You Get With N.Y. Renovation Services
N.Y. Renovation Services is a Staten Island-based, licensed and insured company, and bathrooms are core work because they combine our priority trades: tile and waterproofing, plus demolition, flooring and painting.
Clear scope. The proposal names the membrane system, the tile allowance, the plumbing scope and whether permits and board paperwork are included.
Careful sequence. Hazmat testing, demolition, rough-in, inspection, waterproofing, flood test, tile, fixtures and paint, in that order.
Clean work. Floor and elevator protection, dust control and daily cleanup, especially important in occupied apartments.
A plain contract. Itemized, with allowances labeled and changes in writing.
Giving. We donate 5% of total project cost to a nonprofit of your choice.
See our bathroom remodeling page for the broader scope, or the bathroom budget planner to size a full renovation.
11. Next Steps: Get Your Free Estimate
- Decide the shower type and size you want.
- Take photos of the bathroom, the tub, the ceiling below if accessible, and the building's alteration rules.
- Request a walkthrough through the quote form or call (347) 455-1741, Monday through Saturday, 8:00 AM to 5:00 PM.
- Compare itemized proposals, especially waterproofing method, tile allowance and plumbing scope.
- Sign when the board package, permits and schedule are clear.
A well-built shower conversion should last for decades. The tile is what you see. The waterproofing is what you are paying for.
Safety Note: All work follows OSHA 30 safety and EPA Lead-Safe practices for pre-1978 homes. Check local permit requirements before starting.
James - Lead Renovation Editor. With over 20 years in renovation and construction, James writes and edits our guides. More about James