Town of Johnston
Town of Johnston Zoning Ordinance
§ 340-150

Dimensional requirements

The dimensional regulations provided in Table 1 shall apply to each lot in a conservation development. No variance shall be granted for dimensions to a conservation development. If variances are required, the project shall be completed as a conventional subdivision.

Table 1
Dimensional Requirements for Buildable Lots
Infra- structure: water supply and sewage disposalMinimum dwelling lot sizeMaximum Building Height
(feet)
Minimum Yard Size
(feet)
Accessory Buildings
(feet)
Area
(square feet)
Front- age Width
(feet)
Maximum % Imper- vious SurfacePrincipalAccessoryFrontCrn. SideSideRearSideRear
Single-family, R-40 Zoning District
Public water and public sewer10,0008040%35202522.515351020
Public water or public sewer15,00010035%3520252520351520
On-site well and OWTS20,00012025%3520303025502025
Single-family, R-20 Zoning District
Public water and public sewer10,0008040%35202522.515351020
Public water or public sewer15,00010035%3520252520351520
Single-family, R-15 Zoning District
Public water and public sewer7,5007040%35202522.515351020
Duplex, R-15 Zoning District
Public water and public sewer10,0008040%35203022.515351020