Town of Boston, NY: zoning for new construction

General Residence-Restricted Business District - Lot width is additive and sewer moves it: on public sanitary sewer, 75 ft for the first dwelling unit or other principal building and a further 25 ft for each unit beyond, capped at 200 ft. Without public sewer, add 25 ft to whatever that comes to.

• The 10 ft side yard is for dwellings only: any other principal building takes 30 ft or the height of the building if greater, and 15 ft or half the height beside a lot outside a residential district
• A dwelling for three or more families must stand fifty feet from any property line
• The rear yard is 30 ft or the height of the principal building, whichever is greater, so the figure shown is a floor
• Two principal buildings on one lot must stand 30 ft apart
• The width at the front lot line must equal the width at the building line, so a flag lot is not available here

Local Retail Business District - No side yard is required for a building that is not a dwelling, but one actually provided must be at least five feet, 20 ft or the building height against a residential district boundary, and 25 ft where used for vehicular access. A dwelling takes ten feet.

• Height splits by use: 30 ft for any dwelling and 35 ft for anything else
• The rear yard is 30 ft or the height of the principal building, whichever is greater
• A dwelling for three or more families needs 20,000 sq ft per structure plus a further 3,000 sq ft for each dwelling unit, and must stand at least 30 ft from every property line
• Lot width is additive: 75 ft for the first dwelling unit or other principal building, a further 25 ft for each unit beyond, capped at 200 ft, and 25 ft more without public sanitary sewer
• The width at the front lot line must equal the width at the building line, so a flag lot is not available here
• A 1997 amendment marks the one- and two-family figures here as for historical purposes only, so confirm with the town before relying on them

General Commercial District - No side yard is required for a building that is not a dwelling, but one actually provided must be at least ten feet, 20 ft or the building height against a residential district boundary, 12 ft where used for vehicular access and 25 ft where used for both.

• A dwelling takes ten feet on the side
• The rear yard is 30 ft or the height of the principal building, whichever is greater
• A dwelling for three or more families needs 20,000 sq ft per structure plus a further 3,000 sq ft for each dwelling unit, and must stand at least 30 ft from every property line
• Lot width is additive: 75 ft for the first dwelling unit or other principal building, a further 25 ft for each unit beyond, capped at 200 ft, and 25 ft more without public sanitary sewer
• A 1997 amendment marks the one- and two-family figures here as for historical purposes only, so confirm with the town before relying on them

Industrial Park Research and Development District - The 30 ft height is the by-right ceiling, and the section says so in terms: above it a special permit from the Town Board is needed, with no upper figure named for that case.

• The 50 ft front yard rises to sixty where the lot lies opposite a residential district or where the front yard holds accessory parking
• The 15 ft side yard rises to fifty, or the height of the principal building if greater, against a residential district boundary, and the rear yard follows the side-yard figure there
• Retail, restaurant and commercial recreation uses are accessory only, filling no more than 15% of the principal building's gross floor area and planned as an integral part of it

General Industrial District - The 35 ft height is the by-right ceiling, and the section says so in terms: above it a special permit from the Town Board is needed, with no upper figure named for that case.

• The 50 ft front yard rises to sixty where the lot lies opposite a residential district or where the front yard holds accessory parking
• The 15 ft side yard rises to seventy-five, or the height of the principal building if greater, against a residential district boundary, and the rear yard follows the side-yard figure there

Mobile Home Court District - Lot size, height and yards inside a licensed mobile home court are set by the Town's Mobile Home Court Law in Ch. 70 of the Town Code rather than by the zoning chapter.

Planned Unit Development District - Density is four dwelling units per gross acre, and gross acres count developable land only: wetlands and streams come out first, so a wet parcel yields far fewer units than its deed acreage suggests.

• At least 30% of the site must be kept as open space
• The 100 acre threshold may be relaxed by the Planning Board where the applicant shows the objectives are met and the land is contiguous to an existing planned unit development
• Yards, height and coverage are settled in the approved plan rather than published in advance