Can you build an ADU in Spring Valley, NY?

Low-Density Residential - A corner lot needs 9,000 sq ft on 90 ft of width, rather than 8,500 sq ft on 80 ft. The figures shown are for a detached house; each other use permitted here carries its own complete set of figures.

• Each other use permitted here takes three times the lot a house does: 25,000 square feet on 100 ft of width, with 35 ft in front, 20 ft to a side and 40 ft for the pair, and 40 ft to the rear.
• They include churches, convents, schools, universities, clubs, hospitals, nursery schools, day-care centres, dormitories, community residences, libraries, museums, galleries and utility buildings.
• Their floor area ratio is 0.3, less than half the 0.65 a house gets.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

Low-Medium Residential - A corner lot needs 9,000 sq ft on 90 ft of width, rather than 8,500 sq ft on 80 ft. The figures shown are for a detached house; each other use permitted here carries its own complete set of figures.

• Each other use permitted here takes three times the lot a house does: 25,000 square feet on 100 ft of width, with 35 ft in front, 20 ft to a side and 40 ft for the pair, and 40 ft to the rear.
• They include churches, convents, schools, universities, clubs, hospitals, nursery schools, day-care centres, dormitories, community residences, libraries, museums, galleries and utility buildings.
• A two-family house needs no more land here than a one-family house, 8,500 square feet on 80 ft of width, which is unique in the village; elsewhere it asks ten thousand on a hundred feet.
• Their floor area ratio is 0.3, less than half the 0.65 a house gets.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

Medium-Density Residential - A corner lot needs 9,000 sq ft on 90 ft of width, rather than 8,500 sq ft on 80 ft. The figures shown are for a detached house; each other use permitted here carries its own complete set of figures.

• An institutional use such as a church, school, hospital or library takes 25,000 square feet on 100 ft of width, with 35 ft in front, 20 ft to a side, 40 ft for the pair and 40 ft to the rear.
• A two-family house needs 0.2296 acres on 100 ft of width, a fifth more land than a one-family house, and the yards, the height and the floor area ratio do not change.
• A semiattached house is the smallest lot in the district, 7,000 square feet on 70 ft of width, and is the only residential case whose two side yards need add to no more than 20 ft rather than 30 ft.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

Medium-High-Density Residential - A corner lot needs 9,000 sq ft on 90 ft of width, rather than 8,500 sq ft on 80 ft. The figures shown are for a detached house; each other use permitted here carries its own complete set of figures.

• An institutional use such as a church, school, hospital or library takes 25,000 square feet on 100 ft of width, with 35 ft in front, 20 ft to a side, 40 ft for the pair and 40 ft to the rear.
• A two-family house needs 0.2296 acres on 100 ft of width, a fifth more land than a one-family house, and the yards, the height and the floor area ratio do not change.
• A semiattached house is the smallest lot in the district, 7,000 square feet on 70 ft of width, and is the only residential case whose two side yards need add to no more than 20 ft rather than 30 ft.
• A multifamily building needs 40,000 square feet on 150 ft of width, with 30 ft in front, 20 ft to a side and 40 ft for the pair, 50 ft to the rear, and 40 ft over three storeys.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

High-Density Residential - A corner lot needs 9,000 sq ft on 90 ft of width, rather than 8,500 sq ft on 80 ft. The figures shown are for a detached house; each other use permitted here carries its own complete set of figures.

• An institutional use such as a church, school, hospital or library takes 25,000 square feet on 100 ft of width, with 35 ft in front, 20 ft to a side, 40 ft for the pair and 40 ft to the rear.
• A two-family house needs 0.2296 acres on 100 ft of width, a fifth more land than a one-family house, and the yards, the height and the floor area ratio do not change.
• A semiattached house is the smallest lot in the district, 7,000 square feet on 70 ft of width, and is the only residential case whose two side yards need add to no more than 20 ft rather than 30 ft.
• The multifamily row is the tallest in the village at 80 ft and eight storeys, on the smallest multifamily lot, 20,000 square feet on 150 ft of width, with 50 ft to the rear and a 1.0 ratio.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

Low-Rise High-Density Residential - A corner lot needs 9,000 sq ft on 90 ft of width, rather than 8,500 sq ft on 80 ft. The figures shown are for a detached house; each other use permitted here carries its own complete set of figures.

• An institutional use such as a church or school takes 0.5739 acres on 100 ft of width, with 35 ft in front, 20 ft to a side and 40 ft for the pair, but a 35 ft rear yard and a 0.4 floor area ratio.
• A two-family house needs 0.2296 acres on 100 ft of width, a fifth more land than a one-family house, and the yards, the height and the floor area ratio do not change.
• A semiattached house is the smallest lot in the district, 7,000 square feet on 70 ft of width, and is the only residential case whose two side yards need add to no more than 20 ft rather than 30 ft.
• The multifamily row has the highest floor area ratio of any residential district here, 0.75, on 40,000 square feet and 150 ft of width, with a 30 ft rear yard where others ask fifty.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

Specialized Housing Residential - A corner lot needs 9,000 sq ft on 90 ft of width, rather than 8,500 sq ft on 80 ft. The figures shown are for a detached house; each other use permitted here carries its own complete set of figures.

• An institutional use such as a church, school, hospital or library takes 25,000 square feet on 100 ft of width, with 35 ft in front, 20 ft to a side, 40 ft for the pair and 40 ft to the rear.
• A two-family house needs 0.2296 acres on 100 ft of width, a fifth more land than a one-family house, and the yards, the height and the floor area ratio do not change.
• A semiattached house is the smallest lot in the district, 7,000 square feet on 70 ft of width, and is the only residential case whose two side yards need add to no more than 20 ft rather than 30 ft.
• The multifamily row is restricted to government-assisted housing: 40,000 square feet on 150 ft of width, 30 ft front, 20 ft a side with 40 ft for the pair, 50 ft rear, 40 ft over three storeys.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

Planned Residential Development Overlay - A corner lot needs 9,000 sq ft on 90 ft of width, rather than 8,500 sq ft on 80 ft. The figures shown are for a detached house; each other use permitted here carries its own complete set of figures.

• An institutional use such as a church, school, hospital or library takes 25,000 square feet on 100 ft of width, with 35 ft in front, 20 ft to a side, 40 ft for the pair and 40 ft to the rear.
• A two-family house needs 0.2296 acres on 100 ft of width, a fifth more land than a one-family house, and the yards, the height and the floor area ratio do not change.
• A semiattached house is the smallest lot in the district, 7,000 square feet on 70 ft of width, and is the only residential case whose two side yards need add to no more than 20 ft rather than 30 ft.
• The multifamily row covers multifamily dwellings with retail and personal services: 20,000 square feet, 30 ft front, 20 ft a side with 40 ft for the pair, 50 ft rear, 40 ft over three storeys.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

Professional Office-Residential - A corner lot needs 9,000 sq ft on 90 ft of width, rather than 8,500 sq ft on 80 ft. The figures shown are for a detached house; each other use permitted here carries its own complete set of figures.

• A business or professional office, the use this district exists for, takes 10,000 square feet on 100 ft of width, 30 ft in front, 15 ft a side with 30 ft for the pair, 30 ft rear, at a 0.3 ratio.
• A restaurant seating not more than a stated number takes the same lot but only 10 feet to a side, and is held to two and a half storeys rather than three.
• The institutional row a church or school would use is larger again, at 25,000 square feet with a 35 ft front yard and a 40-foot rear.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

Professional Office - The figures shown are for a business or professional office, or a business, administrative or headquarters office for a philanthropic institution. The district permits nothing residential and nothing retail.

• A church, other place of worship or public utility building needs 25,000 sq ft on a hundred feet of width, or a hundred and twenty-five on a corner, with 35 ft in front and 40 ft to the rear.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

Neighborhood Business - The figures shown are for retail and personal-service uses, excluding the sale of automobile parts or accessories involving installation at the point of sale. A shop here needs no lot area.

• A business or professional office needs 10,000 sq ft on a hundred feet of width, 15 ft in front, 10 ft to a side and 20 ft for both, 20 ft to the rear, and at most two and a half storeys.
• The office floor area ratio is printed as .03, a tenth of the 0.3 comparable office standards carry; confirm with the village which applies.
• A church, other place of worship or public utility building needs 25,000 sq ft on a hundred feet of width (a hundred and twenty-five on a corner), 35 ft in front, 40 ft to the rear and a FAR of 0.3.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

General Business - The figures shown are for a shop, which needs no lot area. Commercial indoor recreation and theatres also need no lot area but may reach 65 ft over six storeys at a floor area ratio of 1.0.

• A multifamily building here takes 20,000 square feet on 150 ft of width, 30 ft in front, 20 ft to a side and 40 ft for the pair, 50 ft to the rear, 40 ft over three storeys and a 0.6 floor area ratio.
• In the Downtown Urban Renewal District a townhome or two-family attached dwelling may sit on 1,650 square feet (0.0379 acres) on 22 ft of width, with a 5 ft front yard, no side yard and 22.5 ft rear.
• A church, other place of worship or public utility building needs 25,000 sq ft on a hundred feet of width (a hundred and twenty-five on a corner), 35 ft in front, 40 ft to the rear and a FAR of 0.3.
• Offices need 10,000 sq ft, and wholesale and warehousing 10,000 sq ft on a hundred feet of width with 15 ft in front.
• Nursery schools and day-care centres carry their own figures again, and this district has eight separate rows in all.
• Not more than half of land under water, in the floodplain, in a utility easement, over 25% slope or in a designated street line may count toward lot area, and no coverage cap is set.

Highway Business - The figures shown are for a shop, which needs no lot area. Commercial indoor recreation and theatres, on no lot area, and hotels and motels, on 20,000 sq ft, may reach 65 ft and six storeys at a floor area ratio of 1.0.

• Hotels and motels keep the same 25 ft width and the same 10 ft side yards.
• Institutional uses need 25,000 sq ft on a hundred feet, a 35 ft front yard, 10 ft to a side and 20 ft for both, and 40 ft to the rear.
• A business or professional office needs 10,000 sq ft on a hundred feet, 30 ft in front, 15 ft to a side and 30 ft for both, and 30 ft to the rear.
• Not more than half of land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or in a designated street line may count toward minimum lot area.
• Spring Valley's bulk requirements set no maximum lot coverage; floor area ratio regulates bulk instead.

Planned Light Industrial - The figures shown are for business and professional offices. An institutional use needs at least 25,000 square feet on a hundred feet of width, with thirty-five feet in front, ten to a side and twenty for the pair, and forty to the rear.

• Commercial parking lots for private passenger vehicles need no lot area, on twenty-five feet of width, with fifteen feet in front and twenty to the rear.
• Commercial indoor recreation and auditoriums may reach sixty-five feet over six storeys at a floor area ratio of 1.0, on no lot area at all.
• Hotels and motels may reach the same sixty-five feet on at least 20,000 square feet.
• Spring Valley sets no maximum lot coverage anywhere; every district is regulated by floor area ratio instead.
• At most half of any land under water, in the hundred-year floodplain, in an overhead-utility easement, unexcavated at over 25% slope or inside a designated street line counts toward the lot minimum.