Building Setbacks & Zoning in Mount Vernon, NY

If you live in Mount Vernon or are thinking about moving there, building setbacks & zoning are one of those things you probably won't think about until they affect you directly. Mount Vernon has 2 specific rules on the books covering different aspects of building setbacks & zoning, and some of them might surprise you.

Structure Height Limits

Mount Vernon caps freestanding accessory buildings, sheds, detached garages and the like, at one story and 12 feet under City Code § 267-14.M, though an accessory structure used solely for parking may match its district's principal-building height if it meets principal-building setbacks. Roof-mounted spires, antennas and similar fixtures get a separate 10-foot allowance under § 267-14.A.

Key details: Accessory building cap: One story, 12 ft maximum. Parking-structure exception: May match principal-building height if setbacks met. Roof projection allowance: Up to 10 ft over district height limit. Roof-projection area cap: Only if 10% or less of roof area. Above threshold: Needs Planning Board special permit.

An accessory building taller than 12 feet or more than one story, without qualifying for the accessory-parking exception, is subject to Building Department enforcement and can be denied a certificate of occupancy. A rooftop structure that exceeds the 10%-roof-area or 10-foot allowance without a Planning Board special permit faces the same enforcement, plus the citywide Code § 1-4 penalty of up to $250, 15 days in jail, or both, and up to $500 for a corporation.

Lot Coverage Limits

Mount Vernon will not issue a building permit that exceeds a zoning district's maximum impervious surface coverage or skips the required landscaped buffer, unless the applicant first wins an area variance from the Zoning Board of Appeals and pays a landscaping fee in lieu of providing the missing pervious surface, under § 267-14.I(4) of the zoning code.

Key details: Governing section: City of Mount Vernon Code § 267-14.I(4). Variance required from: Zoning Board of Appeals. Example coverage cap: Townhouse impervious coverage 80% (§ 267-18.B(7)). Fee due: Before permit issuance or by certificate of occupancy.

Exceeding a district's impervious coverage cap without ZBA approval means the Building Department must deny the permit outright under § 267-14.I(4); there is no fine for the excess coverage itself because the project simply cannot proceed. If work goes forward anyway without a permit, it becomes a Chapter 267 violation subject to § 267-56: a fine up to $1,000, imprisonment up to 15 days, or both, per conviction, with each day of continued violation a separate offense.

The Bottom Line

Mount Vernon's building setbacks & zoning rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Mount Vernon is broadly strict or permissive.

These rules come from Mount Vernon's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.