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Prosser City Zoning Code

18.36 “ID

Infill Development Overlay District

18.36.010 Purpose.

The purposes of the ID overlay district are:

A.    To allow for creative development equal to or superior to traditional lot-by-lot development;

B.    To provide more efficient street and utility systems by increasing density in areas suitable for growth;

C.    To provide for the integration of new development into the existing community while protecting and preserving the values of the surrounding neighborhood;

D.    To integrate new development within neighborhoods to prioritize walkability and middle housing options. (Ord. 3283 § 1, 2025).

18.36.020 Permitted uses.

The following are permitted uses in the ID overlay district:

A.    Multifamily residential buildings, townhouses, cottage courts, and courtyard buildings;

B.    Zero-lot line development; and

C.    Any permitted uses provided by the underlying residential zone the lot is within. (Ord. 3283 § 1, 2025).

18.36.030 Criteria.

Criteria for parcels within the infill development overlay are as follows:

A.    Public Services. All public facilities and services are immediately available and adequate to the site of development within the overlay or can be made available and adequate prior to completion of such development.

B.    Public Roads. The public streets and roads serving the site of development are adequate to carry the additional traffic resulting from the development of the site. (Ord. 3283 § 1, 2025).

18.36.040 Infill development overlay development standards.

Development standards for parcels within the infill development overlay are as follows:

A.    Lot Area. For lots within the RL district, the minimum lot area will be seven thousand five hundred square feet. For lots within the RM or RH district, the minimum lot area will be three thousand square feet.

B.    Minimum Setbacks. For lots within the RL district, minimum setbacks are street frontage, fifteen feet; sides, five feet on one side, and ten feet on the garage side or if no garage then the driveway side if the same exist; rear, twenty feet. For lots within the RM or RH district, minimum setbacks are street frontage, five feet; sides, five feet on both sides; rear, twenty feet.

C.    Minimum Lot Width. For lots within the RL district, the minimum lot width is seventy-five feet. For lots within the RM or RH district, the minimum lot width is twenty-five feet.

D.    Maximum Lot Coverage. For lots within the RL district, maximum lot coverage is sixty percent. For lots within the RM district, maximum lot coverage is eighty-five percent. For lots within the RH district, maximum lot coverage is one hundred percent.

E.    The maximum permitted number of lots/dwelling units for any development in the ID overlay is determined by dividing the gross area of the parcel in square feet by forty-three thousand five hundred sixty square feet, multiplied by the allowed maximum density. The maximum densities for each residential zone are as follows: six for RL, fifteen for RM, and twenty-six for RH. The closest or next lowest whole number is the permitted maximum number of lots. If the maximum density limitation would prevent a single-family dwelling unit from being built in the RL or RM zone, or would prevent a triplex from being built in the RH zoning district, on a lot which was legally existing at the time this section was enacted, then maximum density shall not apply to that lot. (Ord. 3283 § 1, 2025).

18.36.990 Severability.

If any section, subsection, sentence, clause, paragraph, phrase, or word of this chapter should be held to be invalid or unconstitutional by a court of competent jurisdiction, such invalidity or unconstitutionality thereof shall not affect the validity or constitutionality of any other section, subsection, sentence, clause, paragraph, phrase or word of this chapter. (Ord. 3283 § 1, 2025).