Irondequoit, NY Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Residential lot coverage cap
- 25% of lot area, principal and accessory buildings
- Measured
- Horizontally, per § 235-10
- Accessory structures
- Included in the calculation under § 235-13C(6)
- Mixed Use Commercial
- 75% impervious without bonuses, 95% with bonuses
- In-law dwelling units
- Subject to §§ 235-9, 235-10 and 235-11 bulk rules
Summary
In the Town of Irondequoit, the principal and accessory buildings on a lot, measured horizontally, cannot cover more than 25% of the lot area under Town of Irondequoit Code § 235-10. Sheds and garages count toward the cap, and Mixed Use Commercial lots follow a separate impervious surface limit.
The area of the principal and accessory buildings on any lot measured horizontally shall not exceed 25% of the area of such lot.
Full Breakdown
Section 235-10 is a single sentence in Article IV, the article for the R-R, R-1, R-2 and R-3 Residential Districts in the Town of Irondequoit: the area of the principal and accessory buildings on any lot, measured horizontally, cannot exceed 25% of the area of the lot. Article II defines lot coverage as the area of a site covered by buildings or roofed areas, excluding allowed projecting eaves, balconies and similar features, so a covered porch or garage roof counts while a modest eave overhang does not.
Accessory structures are not exempt. Section 235-13C(6) says accessory structures and uses are included in the calculation of lot coverage, and § 235-13B lists the things that qualify: private garages, sheds and storage structures greater than 30 square feet, pergolas, gazebos, private swimming pools, decks, children's playhouses, tennis courts and animal shelters greater than 16 square feet. A homeowner planning a garage and a shed has to fit both under the same cap as the house.
In-law apartments stay inside the same envelope. Section 235-8B(1)(d) allows one additional in-law dwelling unit, attached or detached, in R-R, R-1, R-2 and R-3 only with a special use permit from the Town Board, and it is subject to the bulk regulations in §§ 235-9, 235-10 and 235-11. A detached in-law unit also needs Planning Board site plan approval.
Mixed Use Commercial zoning uses a different measure. Section 235-30.6I sets maximum impervious surface coverage per lot at 75% without bonuses and 95% with bonuses. An owner who cannot meet the 25% cap applies to the Board of Appeals for a variance.
Violations & Fines
Building past the lot coverage cap violates the zoning chapter and is an offense under § 235-102: a fine not to exceed $350, up to six months in jail, or both for a first conviction, rising to $350 to $700 for a second within five years and $700 to $1,000 for a third. Each week of continued violation counts as a separate violation, and § 235-103 lets the Building Inspector seek abatement.
Frequently Asked Questions
What counts toward the 25% lot coverage limit in the Town of Irondequoit?
Does a detached in-law unit change the coverage cap?
Is there a different limit in the Mixed Use Commercial district?
Sources & Official References
Other rules in Irondequoit
New York rules heatmap·Compare Irondequoit to another location·View the New York building setbacks & zoning overview
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Lot Coverage Limits in Nearby Cities
How other cities in Monroe County handle lot coverage limits.