Allendale City Zoning Code
ARTICLE XII
Impervious Surface Coverage, Side Yard Setbacks and Building Coverage
§ 270-61 Definitions.
As used in this chapter, the following terms shall have the meanings indicated:
The percentage of the lot area that may be covered by building structures or impervious surfaces.
Land areas covered by buildings or other structures. These areas shall include residences, garages, sheds, porches, decks, cabanas and buildings or other structures with roofed areas.
The percentage of the lot area that limits the overall gross building floor area.
Is defined as the gross building floor area of the buildings on the property. The gross building area shall include all enclosed floor areas on all floors for residences, accessory buildings or garages. The gross building area shall not include open porches, unfinished attics, basements, decks or patios.
Land surface areas that do not allow rainwater to be directly absorbed by the ground. These surfaces shall include:
The actual land area of the property or lot, including easements or rights-of-way.
Includes:
The minimum dimension between a building or structure and the side property line.
§ 270-62 Impervious surfaces.
The maximum allowable coverage for the combined building and impervious surface area for single-family residential lots shall be determined as follows:
A.
For lots less than 10,000 square feet in area, the maximum allowable impervious coverage shall be 55% of the lot area.
B.
For lots over 40,000 square feet in area, the maximum allowable impervious coverage shall be 27.5% of the lot area.
C.
For lots with areas between 10,000 square feet and 40,000 square feet, the maximum percentage of allowable impervious coverage shall be equal to 55 divided by the square root of the lot area.
§ 270-63 Floor area ratios.
A.
The floor area ratio (FAR) is determined as follows:
(1)
For lots with less than 10,000 square feet, the FAR shall be 25% of the lot area.
(2)
For lots with more than 40,000 square feet, the FAR shall be 19% of lot area.
(3)
For lots between 10,000 square feet and 40,000 square feet, the FAR percentage shall be computed as follows: FAR = 25 - .0002 times (lot area - 10,000).
B.
The gross building area of a residential lot shall not exceed the percentage of the lot area which is equal to the floor area ratio as determined herein.