Skip to content
New York City — Tier-1 Pillar

NYC Plumbing — Master Plumber Law, Alt-2, Riser Work, LAA Type 2

NYC plumbing reality. NY master plumber license required for all permit-filed work, Alt-2 vs LAA Type 2, common-line riser work with structural PE, cast-iron stack replacement in pre-war buildings. $5K-$65K typical.

~1 min read·Updated 2026-04-23

NYC requires a NY State master plumber license on every permit-filed plumbing job. DCWP also licenses plumbers. LAA Type 2 covers plumbing-only scope; Alt-2 covers plumbing + other trades. Common-line riser work in pre-war buildings means structural PE sign-off on top of the master plumber.

Frequently asked questions

Do NYC plumbers need a license? Yes — NY State master plumber license is required on any permit-filed plumbing work in the five boroughs.

What is LAA Type 2? Limited Alteration Application Type 2 — a DOB filing track for mechanical-only or plumbing-only work that doesn't change use or multiple trades.

<!-- STUB: content-sprint agent should expand to 1,200-word pillar. Add sections on: master plumber vs journeyman, cast-iron vs copper vs PEX, NYC plumbing code specifics, riser replacement timeline, typical cost by scope. -->
Served in 57 neighborhoods

Where in nyc we match contractors

All neighborhoods →

Each neighborhood has distinct regulatory posture. Baily pre-scopes against the specific overlay your home sits under.

Talk to Baily about your New York City project

Start a scoping conversation. Baily verifies every matched contractor against the specific licensing, insurance, and permit requirements that apply in New York City before you get a quote.

Loading chat…

Origin

Who is Baily?

Baily is named after Francis Baily — an English stockbroker who retired at 51, became an astronomer, and in 1836 described something on the edge of a solar eclipse that nobody had properly articulated before: a string of bright beads of sunlight breaking through the valleys along the moon’s rim.

He wasn’t the first to see them. Edmond Halley saw them in 1715 and barely noticed. Baily’s contribution was clarity — describing exactly what was happening, in plain language, so vividly that the whole field of astronomy paid attention. The phenomenon is still called Baily’s beads.

That’s what we wanted our AI to do. Every inbound call and text has signal in it — a homeowner’s real question, a timeline, a budget, a hesitation that means “yes but.” Baily listens to every one, 24/7, and finds the beads of light.

Baily was a businessman before he was a scientist. That’s our vibe too.