01Who can do plumbing work
In New York City, plumbing work must be performed by a NYC Licensed Master Plumber (LMP) or by people working under an LMP's supervision. The license is issued by the Department of Buildings. A home improvement contractor license from the Department of Consumer and Worker Protection is not a plumbing license.
02Three paths for plumbing work
| Path | What it covers | Who files | Notes |
|---|---|---|---|
| No permit: ordinary repairs & minor work | Certain repairs and replacements defined in the NYC Administrative Code (§28-105.4), such as replacing an existing fixture | Not filed as a permit; the LMP reports qualifying work to DOB in a monthly report | Still requires an LMP |
| Limited Alteration Application (LAA) | Plumbing work that doesn't include construction work, within limited-alteration scope | LMP, in DOB NOW: Build | Since Oct 15, 2018, new LAAs are filed in DOB NOW |
| Work permit with drawings | Scope beyond limited alteration | Professional Engineer or Registered Architect files drawings; the LMP performs the work | Larger renovations, new systems |
03Emergency work
When emergency work is necessary, a Licensed Master Plumber may file an Emergency Work Notification (EWN) and perform the work before filing the Limited Alteration Application. A burst pipe does not have to wait for paperwork.
04Gas piping
Gas piping work is also LMP work. Separately, under Local Law 152 of 2016, buildings with gas piping (other than one- and two-family homes classified R-3) must have their gas piping inspected at least once every four years, on a schedule set by community district. LL152 explained.
Leave the building and call 911 or your gas utility from outside.
05What owners should keep in mind
- Get the license number and check it before work starts.
- Co-ops and condos often require board approval and an alteration agreement in addition to DOB filings.
- Service lines and building sewers are the owner's responsibility up to the city mains; street and sidewalk work involves additional city permits.
- Keep records of filings and sign-offs. They matter when you sell or refinance.
06Frequently asked questions
Can I do my own plumbing in my NYC house?
No. In New York City, plumbing work must be performed by or under the supervision of a NYC Licensed Master Plumber, including in owner-occupied one- and two-family homes.
Does replacing a toilet or faucet need a permit in NYC?
Replacing an existing plumbing fixture is classed as minor work that can be done without a work permit, but it must still be done by or under a Licensed Master Plumber. Relocating fixtures or adding new ones is different. Confirm the specific scope with the LMP.
What happens in an emergency, before a permit can be filed?
For emergency work, a Licensed Master Plumber can file an Emergency Work Notification (EWN) and do the work before filing the Limited Alteration Application.
Who files the permit, me or the plumber?
The Licensed Master Plumber files plumbing applications in DOB NOW: Build. When the scope exceeds limited alteration, a Professional Engineer or Registered Architect files drawings. As the owner, you may be asked to sign or authorize the filing.
07Sources
Sources & review
Last reviewed . General information, not legal or engineering advice. Rules change and individual buildings differ.
Related: New Jersey permits · Compare all jurisdictions · Brooklyn