Before You Build in New York, NY: Permit & Rule Checklist (2026)

New York City does not impose a cost-sharing 'partition fence' duty on neighbors; boundary fence disputes fall under New York State law. RPAPL 843 makes a fence over 10 feet built to block a neighbor's light or air a private nuisance, and RPAPL 543 treats fences as permissive non-adverse encroachments.

For one- and two-family dwellings, the NYC Department of Buildings does not require a permit for fences 6 feet or less in height, and homeowners may install their own fencing. Taller fences, construction-site fences, and fences extending into the roadway have additional permit requirements.

In New York City, fences in a front yard of a Residence District may not exceed 4 feet above adjoining grade (6 feet allowed on the qualifying portion of a corner lot). The NYC Administrative Code caps residence-district fences at 6 feet overall and non-residence-district fences at 10 feet.

NYC Building Code and Health Code require all swimming pools to have barriers at least 4 feet high with self-closing, self-latching gates. The NYC DOHMH regulates pools under Article 165 of the Health Code. Pool barriers must prevent uncontrolled access by children under 5.

Retaining walls in NYC are regulated under the NYC Building Code (Title 28) and require DOB permits when exceeding certain height thresholds. Walls over 4 feet require professional engineering and DOB approval. NYC has seen increased enforcement since building collapses related to retaining wall failures.

Every New York swimming pool capable of holding water more than 24 inches deep must be surrounded by a barrier. For one- and two-family homes the NYS Residential Code requires a permanent barrier at least 4 feet (48 inches) high with self-closing, self-latching gates; commercial and multi-family pools regulated by the NYC Health Code must be enclosed by a barrier at least 6 feet high.

NYC Health Code Article 165 requires permitted pools to be maintained free of sediment, lint, dirt and hair, vacuumed or brushed daily, with enclosures, depth markings and safety signs kept in good repair. New residential pools must also have an approved pool alarm unless they have an ASTM F1346 safety cover.

No one may construct or operate a 'bathing establishment' pool in New York City without prior construction authorization and a permit from the Department of Health and Mental Hygiene (NYC Health Code Article 165). Pools within a one- or two-family dwelling used solely by occupants for non-commercial purposes are exempt from the permit but require a DOB building permit and must meet the state barrier rules.

Above-ground swimming pools in New York must be surrounded by a barrier just like in-ground pools when they can hold water more than 24 inches deep. The pool's own raised structure may serve as part of the barrier if it is at least 4 feet high, but any ladder or steps must be removable, lockable, or otherwise secured against unsupervised access.

In New York a spa or hot tub capable of holding water more than 24 inches deep is treated as a swimming pool and must be surrounded by a barrier, unless it is equipped with an ASTM F1346-compliant safety cover. Commercial spa pools regulated by the NYC Health Code must be drained and cleaned at least every two weeks.

New York City legalized Ancillary Dwelling Units (ADUs) citywide on December 5, 2024 through the City of Yes for Housing Opportunity text amendment. An ADU is an additional dwelling unit of up to 800 square feet permitted on the same zoning lot as a single- or two-family residence, limited to one ADU per residence and requiring owner primary-residency.

Following City of Yes for Housing Opportunity, New York City allows legally existing garages (attached, within the home, or detached) on 1- and 2-family lots to be converted into ancillary dwelling units of up to 800 square feet, with non-compliant setbacks of the original garage generally retained and required parking eliminable where zoning permits.

New York City permits sheds, tool rooms, and similar accessory storage buildings in required rear yards in all Residence Districts, provided they do not exceed 10 feet in height above the level of the rear yard. They are permitted only in rear yards, not front or side yards.

Carports in NYC require DOB permits and must comply with the Zoning Resolution's setback, lot coverage, and open space requirements. In most residential districts, carports count as lot coverage and must meet side and rear yard setbacks. Building Code structural requirements apply.

Tiny homes face significant regulatory barriers in NYC. The Building Code sets minimum room sizes (120 sq ft for a living room, 80 sq ft for a bedroom). The Zoning Resolution generally does not permit standalone dwelling units on lots zoned for single-family use. Tiny homes on wheels are classified as vehicles and cannot serve as permanent dwellings.

New York City does not allow open backyard fires generally, but FDNY Fire Code Section FC 307.7 carves out a narrow exception for manufactured residential fire pits. They may be used only at a detached one-family-style (Group R-3) home in an R1, R2 or R3 zoning district, must stay at least 10 feet from anything combustible, and must be constantly attended. Apartment buildings, balconies and rooftops are not permitted locations.

Open burning is broadly prohibited in New York City under both state and city law. New York State regulation 6 NYCRR 215.2 bans burning any material in an open fire except for a short list of exceptions, and the NYSDEC confirms that 'Burning trash is illegal statewide in all cases.' New York City Administrative Code Section 24-149 independently prohibits open fires that emit air contaminants, allowing only narrow exceptions such as small charcoal/gas barbecue grills.

All street and park trees in New York City are under the jurisdiction of the Department of Parks and Recreation. Administrative Code Sec. 18-129 makes it unlawful to cut, remove, or in any way destroy a tree on public property without written consent from the Commissioner, punishable as a misdemeanor by up to a $15,000 fine and one year in jail, plus a civil penalty of up to $10,000 per violation.

New York City imposes year-round outdoor water-use rules under 15 RCNY Sec. 20-08. Using a hose, automatic sprinkler, or other means to water lawns or gardens is prohibited between 11:00 a.m. and 7:00 p.m., and from November 1 through March 31 hose, sprinkler, and lawn/garden watering with City water is banned except hand-watering of non-turf plants.

Removing a street or park tree in New York City requires the written consent of the Parks Commissioner under Administrative Code Sec. 18-129. Unauthorized removal is a misdemeanor (up to $15,000 fine and one year in jail) plus a civil penalty of up to $10,000 per tree, and offenders can be barred from obtaining tree-work consent for up to two years.