Do you need a permit to replace a water heater in New York City?
It depends on the project. New York City exempts some water heaters from a building permit and requires one for the rest1. Work that needs no building permit can still need zoning approval.
On this page
Depends on size or scope
New York City's rule“In buildings classified as residential occupancy groups occupied by five families or fewer, the replacement of a gas…”1
City of New York, Department of Buildings, §28-105.4.4 item 5
Where New York City names water heaters“…water heater, gas furnace, or a gas-fired boiler with a capacity of 350,000 BTU (103 kW) or less where the existing…”1
City of New York, Department of Buildings, §28-105.4.4 item 5
Which permits you need
| Permit | Required when | The city’s wording |
|---|---|---|
| Plumbing permit | Work beyond ordinary plumbing work (e.g., gas water heater over 350,000 BTU, moved shutoff valve, or buildings over five families) | …water heater, gas furnace, or a gas-fired boiler with a capacity of 350,000 BTU (103 kW) or less where the existing…1 |
Limits and conditions in New York City's rule
Each limit sits next to the sentence it comes from; the conditions in that sentence are part of the rule.
| Rule | Value | The city’s wording |
|---|---|---|
| Exempt up to this heating capacity | 350,000 BTU | …water heater, gas furnace, or a gas-fired boiler with a capacity of 350,000 BTU (103 kW) or less where the existing…1 |
| Dwellings covered | 5 families | In buildings classified as residential occupancy groups occupied by five families or fewer, the replacement of a gas…1 |
| Like-for-like replacement exempt? | Yes, with conditions | …appliance shutoff valve is not moved, provided that the plumber has inspected the chimney and found it to be in good…1 |
Zoning rules: separate from the building permit
A project can be exempt from one and still need the other (zoning vs building permits).
| Zoning rule | Value | The city’s wording |
|---|---|---|
| Zoning approval needed even without a building permit? | Yes | Any exemptions outlined by this rule will not grant authorization for any…2 |
Who can apply
Special areas and extra reviews
- Landmarks Preservation Commission filing may still be required2
Who to ask
Water heater permit rules in other cities
Rules differ from city to city. Compare New York City with 18 other cities on the national water heater permit guide, or go straight to one:
- Los Angeles, CA
- Chicago, IL
- Phoenix, AZ
- San Antonio, TX
- San Diego, CA
- Dallas, TX
- Jacksonville, FL
- Fort Worth, TX
- San Jose, CA
- Charlotte, NC
- Columbus, OH
- Indianapolis, IN
- San Francisco, CA
- Seattle, WA
- Denver, CO
- Oklahoma City, OK
- Philadelphia, PA
- Austin, TX
Sources
- 2022 NYC Construction Codes, General Administrative Provisions (Admin. Code Title 28), Chapter 1 AdministrationCity of New York, Department of BuildingsChecked November 7, 2026
- 1 RCNY §101-14 Categories of work that may or may not require a permitCity of New York, Department of BuildingsChecked November 7, 2026
- Does my project require a permit? - BuildingsCity of New York, Department of BuildingsChecked November 7, 2026
- Obtaining a Permit - BuildingsCity of New York, Department of BuildingsChecked November 7, 2026
- Contact Us - BuildingsCity of New York, Department of BuildingsChecked November 6, 2026
- Office Locations - BuildingsCity of New York, Department of BuildingsChecked November 6, 2026
- Use DOB NOW - BuildingsCity of New York, Department of BuildingsChecked November 7, 2026
- Permits by Type - BuildingsCity of New York, Department of BuildingsChecked November 7, 2026