Mount Vernon's Fence Regulations: The Rules That Matter

Every city handles fence regulations a little differently. In Mount Vernon, New York, there are 6 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Pool Barriers

All residential pools must have a barrier at least 48 inches high with self-closing, self-latching gates per NYS Residential Code Appendix G. A pool alarm is required for pools built or substantially modified after Dec 14, 2006.

Key details: Barrier height: 48 in minimum. Gate: Self-close, self-latch. Alarm: Required post-2006 pools. Code: NYS Residential Appx G. Fine: Up to $5,000/day.

Fines up to $5,000 per day of violation; alarm signage violations carry $500 first offense and $1,000 subsequent.

This is not one of those rules that cities tend to ignore. Mount Vernon actively enforces its pool barriers requirements.

Retaining Walls

Retaining walls over 4 ft measured from bottom of footing to top of wall require a building permit and sealed engineered drawings. Walls with surcharge (driveway, pool, building above) require engineering at any height.

Key details: Permit trigger: Over 4 ft. Engineering: NY-licensed PE seal. Surcharge walls: Engineered any height. Drainage: Required in plans.

Material Restrictions

Mount Vernon prohibits barbed wire, razor wire, and electrified fences in residential zones. Chain link is permitted but generally discouraged in front yards; some historic areas may require wood or ornamental metal.

Key details: Barbed/razor wire: Residential ban. Electrified: Prohibited residential. Chain link: Allowed, discouraged in front. Historic areas: Stricter materials.

Neighbor Fence Rules

NY Real Property Law Sec. 840 governs boundary fences between adjoining owners and allows shared cost arrangements. Mount Vernon does not impose its own cost-sharing rule; disputes are civil matters.

Key details: State law: NY RPL Sec. 840. Cost sharing: Between owners. Finished side: Faces neighbor. Boundary dispute: Civil court.

Height Limits

Typical Mount Vernon residential zoning allows fences up to 4 ft in front yards and 6 ft in rear and side yards. Corner lots have sight-triangle limits to protect intersection visibility.

Key details: Front yard: 4 ft maximum. Side/rear: 6 ft maximum. Corner lots: Sight triangle limits. Over limit: Permit + variance.

Notice of violation, required take-down or lowering, and daily fines for noncompliance.

Permit Requirements

A building permit from the Mount Vernon Building Department is required for most new fences and for replacements that change height, materials, or location. Simple in-kind repairs of existing fences generally do not require a permit.

Key details: Permit: Required for new fences. In-kind repair: Generally exempt. Site plan: Required with app. Survey: Strongly advised.

Stop-work order, required removal, and fines for unpermitted installation. Unpermitted work also complicates home sales.

The Bottom Line

Mount Vernon's fence regulations 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.

This guide is based on Mount Vernon's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.