Can you build an ADU in Tivoli, NY?

Residential 15,000 Square Feet - A one- or two-family dwelling is capped at 2,600 sq ft of building size and 1,750 sq ft of footprint, and no building may be more than 48 ft wide. The front yard is a build-to range, 20 ft minimum and 50 ft maximum.

• Lot width is capped at 80 ft at the street and at the front building line, so a lot can be too wide here, not just too narrow.
• The 35% cap is total lot coverage, building coverage plus all other impervious surfaces.
• The land-per-dwelling figure applies to each dwelling, so a second dwelling on the lot needs that area again.
• The two side yards must total at least 30 ft, with the narrower no less than 1/3 of the total.
• Lots fronting Spring Street take an 18 ft minimum front yard instead of 20 ft; on Washburn Street, Feroe Street and Broadway west of the White Clay Kill the maximum is 30 ft instead of 50 ft.
• Accessory buildings may reach 25 ft and must sit at least 20 ft behind the front building line of the principal building, 10 ft from the side and 10 ft from the rear.

Residential 1-Acre - A one- or two-family dwelling is capped at 2,600 sq ft of building size and 1,750 sq ft of footprint, and no building may be more than 48 ft wide. The front yard is a build-to range, 40 ft minimum and 70 ft maximum.

• Lot width is capped at 125 ft at the street and at the front building line, so a lot can be too wide here, not just too narrow.
• The 30% cap is total lot coverage, building coverage plus all other impervious surfaces.
• Lots fronting Pine Street take a 20 ft minimum and 30 ft maximum front yard instead of 40 and 70, and are allowed 35% lot coverage instead of 30%.
• The land-per-dwelling figure applies to each dwelling, so a second dwelling on the lot needs that area again.
• The two side yards must total at least 30 ft, with the narrower no less than 1/3 of the total.
• Accessory buildings may reach 25 ft and must sit at least 20 ft behind the front building line of the principal building, 10 ft from the side and 10 ft from the rear.

Residential 2-Acre - No building may be more than 58 ft wide, a limit separate from coverage and lot width. The land-per-dwelling figure applies to each dwelling, so a second dwelling on the lot needs that area again.

• The 25% cap is total lot coverage, building coverage plus all other impervious surfaces.
• Lots fronting Broadway east of the White Clay Kill take a 100 ft maximum front yard, the R-1A side yard rule instead of 35 ft, a 25 ft rear yard instead of 35 ft, and a 48 ft maximum building width.
• Accessory buildings may reach 30 ft and must sit at least 20 ft behind the front building line of the principal building, 10 ft from the side and 10 ft from the rear.
• Lot width is controlled at the street and at the front building line.
• An open front porch may extend up to 10 ft into the front setback.

Residential 3-Acre - Lot width must be at least 100 ft at the street and 250 ft at the front building line. The land-per-dwelling figure applies to each dwelling, so a second dwelling on the lot needs that area again.

• The 20% cap is total lot coverage, building coverage plus all other impervious surfaces.
• Accessory buildings may reach 35 ft and must be set back 50 ft from the front, 50 ft from the side and 50 ft from the rear.
• An open front porch may extend up to 10 ft into the front setback.
• A minimum area per dwelling also applies under § 231-28.

General Business - The front of new construction or a renovation may come as close to the edge of the road pavement as either adjacent building, but no closer. The 90% total coverage cap counts building coverage plus all other impervious surfaces.

• Buildings may sit as close to the side and rear property lines as the New York State Uniform Fire Prevention and Building Code permits.
• Accessory buildings must sit at least 20 ft behind the front building line of the principal building, and at the side and rear as close as the State building code allows.
• Accessory buildings may reach 35 ft.
• A minimum area per dwelling applies under § 231-28.

Residential/Business - For multifamily and nonresidential uses a principal building may not exceed 7,500 sq ft of floor area or 5,000 sq ft of footprint. No building may exceed 48 ft in width, except that a nonresidential use has no maximum building width.

• A nonresidential use is allowed 40% lot coverage rather than 30%, and accessory structures up to 35 ft rather than 30 ft.
• The coverage cap counts building coverage plus all other impervious surfaces.
• For multifamily and nonresidential uses an accessory building is limited to 5,000 sq ft of floor area and 2,600 sq ft of footprint, and all accessory buildings together to 5,000 sq ft.
• Where residential and nonresidential uses share a parcel, one- and two-family bulk follows the Historic Overlay District (§ 231-22.2D) and the aggregate size limits bind the whole parcel.
• The land-per-dwelling figure applies to each dwelling, so a second dwelling on the lot needs that area again.
• Accessory buildings must be set back 60 ft from the front, 30 ft from the side and 35 ft from the rear.

Land Conservation - The 300 ft minimum lot width is measured at the front building line. Accessory buildings may reach 35 ft and must be set back 50 ft from the front, 50 ft from the side and 50 ft from the rear.

• The 20% cap is total lot coverage, building coverage plus all other impervious surfaces.
• An open front porch may extend up to 10 ft into the front setback.
• A minimum area per dwelling applies under § 231-28.