Town of Irondequoit, NY: zoning for new construction

R-1 Residential - The side setback shown is a formula at the district's minimum width: 10% of lot width, never less than 5 ft and capped at 15 ft in R-1, so it grows on a wider lot. A corner lot owes the full front setback on every yard adjacent to a street.

• Minimum total floor area is 1,100 sq ft whether the dwelling is one storey or one and a half to two storeys, with a minimum ground floor area of 600 sq ft on the taller forms.
• Floor area counts only conditioned interior space along the main foundation walls; attached garages, three-season rooms, porches and breezeways are excluded.
• An approved tiny house is expressly exempt from the minimum building size.
• A through lot owes the full front setback on both streets for principal and accessory structures alike, with boundary fencing excepted.
• A deck attached to the principal structure may come within 20 ft of the rear lot line, where the building itself may not.
• Detached accessory structures may not sit in a front yard and, private garages excepted, must keep four feet to a rear or side property line.

R-2 Residential - The side yard is 10% of the lot width, never less than 5 ft and capped at 15 ft, so it grows on a wider lot until it reaches 15 ft. A corner lot owes the full front setback on every yard next to a street.

• A through lot owes the front setback on both streets for the house and accessory structures, boundary fencing excepted.
• The 900 sq ft minimum counts only conditioned interior space; attached garages, three-season rooms, porches and breezeways do not count.
• A dwelling of one and a half to two storeys also needs at least 550 sq ft of ground floor area.
• An entry porch, deck or stoop under 60 sq ft and 6 ft deep may project into the front yard, keeping 20 ft to the front lot line if attached; 20 sq ft and 4 ft if the house fails the front setback.
• A deck attached to the house may come within 20 ft of the rear lot line.
• Detached accessory structures may not stand in a front yard and, except private garages, must keep 4 ft from side and rear property lines.

R-3 Residential - The 8 ft side yard is a formula, not a fixed figure: 10% of lot width, never less than 5 ft and capped at 15 ft in R-3, so it grows on a wider lot. A corner lot owes the full 30 ft front setback on every yard next to a street.

• A through lot owes the front setback on both streets, for principal and accessory structures alike, with boundary fencing excepted.
• The 750 sq ft minimum counts only conditioned interior space along the main foundation walls; attached garages, three-season rooms, porches and breezeways are excluded.
• A dwelling of one and a half to two storeys also needs a ground floor area of at least 500 sq ft.
• An approved tiny house is exempt from the minimum building size.
• A deck attached to the principal structure may come within 20 ft of the rear lot line, closer than the building itself may sit.
• Detached accessory structures may not sit in a front yard and, private garages excepted, must keep four feet to a rear or side property line.

R-R Rural Residential - The front setback is a range, not just a floor: a house must sit at least 50 ft back and no more than 75 ft from the front lot line. The side yard is 10% of lot width, never less than 5 ft and capped at 25 ft, so it grows on a wider lot.

• A corner lot owes the full front setback on every yard adjacent to a street, and a through lot owes it on both streets for principal and accessory structures alike, boundary fencing excepted.
• On a lot inside a curve, the front yard is measured from the nearest point of the arc.
• A deck attached to the principal structure may come within 20 ft of the rear lot line, where the building itself may not.
• A porch, deck or stoop and its covering may project into the required front yard if it is under 60 sq ft and less than six feet deep, and an attached platform must keep 20 ft to the front lot line.
• Detached accessory structures may not sit in a front yard and, private garages excepted, must keep four feet to a rear or side property line.
• The 1,300 sq ft minimum floor area counts only conditioned interior space and expressly exempts an approved tiny house; one and a half to two storey forms also need a 700 sq ft ground floor.