Bathroom remodeling · Manhattan
Manhattan bathroom remodeling, built to protect the ceiling below
We remodel bathrooms in Manhattan apartments and townhouses, from prewar baths with original tile to small condo bathrooms that need better storage and light. Because a neighbor's ceiling usually sits under your floor, the plan centers on waterproofing, coordinated water shutoffs with building staff and the board's alteration rules.
- Waterproofing planned for a floor that sits over a neighbor's ceiling
- Riser shutoffs booked through the super or managing agent in advance
- A second bathroom scoped around the required ALT2 filing
Scope
What a Manhattan bathroom project includes
We rebuild the room within the apartment's existing walls and the limits the building sets. Changes to shared risers or building structure stay with the building and its engineers.
- Removal of old tile, mortar beds and fixtures, with debris bagged for the service elevator
- Shower pans and waterproofing membranes checked for leaks before any tile is set
- Tub, shower, vanity and toilet installation; in NYC the plumbing part requires a Licensed Master Plumber
- Exhaust fan and duct connected to the route the building permits
- Tile, stone, lighting, mirrors and recessed storage sized for a compact room
- Floor-height and threshold planning where a new floor meets old hallway oak
- Final cleaning of the bathroom, hallway and elevator path
Process
How MMA Construction & Remodeling runs a bathroom remodeling project
Written scope, written proposal, permits identified up front, and one project lead from start to finish.
Conversation
You describe the home and what you want to change. We ask about budget range and timing so expectations are clear early.
Site visit and scope
We look at the space, the structure of the house and any HOA, co-op or condo rules that apply, then write a scope of work. In a Manhattan building we also confirm the board's alteration rules and book riser shutoffs through the super or managing agent in advance.
Design and selections
Layout, materials and fixtures are agreed in writing before work is priced in full.
Written proposal
A written price and schedule for the agreed scope. Permits and any approvals are identified at this stage.
Build
One project lead coordinates the trades and keeps you updated. Some regulated work may require appropriately licensed specialty contractors. Because your floor usually sits over a neighbor’s ceiling, the shower pan is filled with water and watched for a set period before tile goes on.
Walkthrough
We review the finished work with you and resolve anything outstanding.
Manhattan
What shapes a bathroom remodel in a Manhattan building
Your floor is someone else's ceiling
In a multi-unit building, a slow leak from a failed shower pan shows up first in the apartment below. That is why many boards look hard at bathroom plans and why alteration agreements often address water damage and insurance. Our sequence keeps the risk low: the membrane goes on under the tile, the shower pan is filled with water and watched for a set period before tile goes on, and supply connections are checked under pressure. If old damage turns up in the subfloor, we document it with photos and agree on the repair in writing.
Riser shutoffs and building staff
Many prewar buildings lack a valve for each apartment, so cutting water to your bathroom can mean shutting a riser that serves every unit stacked above and below. Buildings handle that through the super or managing agent, usually with notice to neighbors and a limited window. Our project lead requests those shutoffs early, groups the plumbing tasks that need them, and often adds new shutoff valves for the apartment when the building allows it, so later work can happen without disturbing the stack.
Old tile, thick mortar beds and what lies beneath
Bathrooms from the early 20th century were often set on thick mortar beds over the structure, and removing them can change the floor height and expose old pipe. With 42% of Manhattan homes in structures from 1939 or earlier, plan for that. Old floor tile, mastic and pipe wrap can be suspect materials; under DEP's rule the building owner must have a certified investigator survey them before work begins. We raise that question with the building before tear-out is booked.
Adding a bathroom or moving one
A brand-new bathroom is one of DOB's own examples of an ALT2 job, which an engineer or architect must file, and relocating fixtures past a limited alteration calls for drawings as well. The board's question usually comes first, because a new or relocated bathroom may sit over a neighbor's bedroom. Swapping a toilet or sink where it already sits is another matter, since DOB's plumbing page treats a straight fixture replacement as minor work that may proceed without a permit.
Ready to plan the bathroom around your building's rules?
Share photos of the bathroom, the ceiling below if you know of past leaks, and your building's alteration guidelines. We will review them before the site visit and arrive with the right questions for the super.
Local evidence
Manhattan permits, building age and landmark rules for a bathroom
| Task | How DOB treats it |
|---|---|
| Replacing an existing toilet, sink or tub in place | Treated as minor work; may proceed without a permit |
| Limited plumbing alterations | A Licensed Master Plumber and a permit |
| Adding a new bathroom | One of the ALT2 examples; an engineer or architect files it |
| Plumbing work beyond limited alterations | Drawings submitted by a PE or RA for DOB approval |
Building age shapes what a tear-out reveals. In the 2024 Census estimates, 395,036 of Manhattan's 932,314 housing units (42.4%) are in structures built in 1939 or earlier, and about 77% are in structures built before 1980. Where paid work disturbs lead-based paint in a home built before 1978, EPA requires certified firms and renovators, and for pre-1960 multiple dwellings, HPD's Local Law 1 page tells owners to treat paint as lead-based until shown otherwise.
A new exhaust outlet through an outside wall is exterior work in LPC's terms. If the building is designated, LPC wants its own permit for that vent, because its rules cover interior changes that reach the outside, louvers and vents included, as well as any interior job needing a DOB permit. The DCWP Home Improvement Contractor license applies to all of this work on residential property in the city. In Tribeca's store-and-loft and warehouse buildings, that vent question usually comes first.
Planning a bathroom remodel in Manhattan? Call or email us to talk it through and arrange a consultation.
Questions
Bathroom remodeling in Manhattan: questions
Who pays if a leak from my renovation damages the apartment below?
Why does my building want notice before the water is shut off?
Can a bathroom in a historic-district building get a new exhaust vent through the wall?
Can I add a second bathroom to my apartment?
Keep exploring
Sources
- B25034 Year Structure Built, New York County (Manhattan), ACS 2024 1-year estimates, U.S. Census Bureau via Census Reporter (2025 (ACS 2024 1-year release, acs2024_1yr)). Accessed 2026-11-09.
- Renovating Kitchens & Bathrooms, NYC Department of Buildings. Accessed 2026-11-09.
- Project Requirements for Owners: Plumbing, NYC Department of Buildings. Accessed 2026-11-09.
- License Checklist: Home Improvement Contractor, NYC Department of Consumer and Worker Protection. Accessed 2026-11-09.
- Permit Types, NYC Landmarks Preservation Commission. Accessed 2026-11-09.
- Asbestos Abatement, NYC Department of Environmental Protection. Accessed 2026-11-09.
- Lead Renovation, Repair and Painting Program Rules, U.S. Environmental Protection Agency. Accessed 2026-11-09.
- Lead-Based Paint, NYC Department of Housing Preservation and Development. Accessed 2026-11-09.
Talk to us about your bathroom project in Manhattan
Call or email us to talk it through and arrange a consultation.