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Thurston County Unincorporated
City Zoning Code

CHAPTER 20

21A - RESIDENTIAL—FOUR TO SIXTEEN DWELLING UNITS PER ACRE R 4—16/1

20.21A.010 - Purpose.

The intent of this district is to permit single-family and multifamily residential development up to sixteen dwelling units per acre in areas characterized by: (1) a lack of severe and/or moderate physical limitations; (2) proximity to urban core or incorporated areas; (3) availability of urban services (i.e., water, sewer, roads, shopping, schools, etc.); (4) a likelihood of future annexation; (5) superior transportation access; and (6) designated areas within the Grand Mound urban growth area to ensure more compact development.

(Ord. 11398 § 3 (part), 1997: Ord. 11220 § 2 (part), 1996)

20.21A.020 - Primary uses.

Subject to the provisions of this title, the following uses are permitted in the residential, four to sixteen units per acre district as primary uses:

1.

Single-family and multifamily;

2.

Home occupations per standards in Section 20.54.070(16).

(Ord. 11804 § 65, 1998: Ord. 11398 § 3 (part), 1997: Ord. 11220 § 2 (part), 1996)

20.21A.030 - Accessory uses.

Accessory dwelling unit, in accordance with the provisions of Chapter 20.34.

(Ord. 11398 § 3 (part), 1997: Ord. 11220 § 2 (part), 1996)

20.21A.040 - Special uses.

See Chapter 20.54 for special uses permitted in this district.

(Ord. 11398 § 3 (part), 1997: Ord. 11220 § 2 (part), 1996)

20.21A.050 - Density.

1.

Minimum: four dwelling units per acre within the Grand Mound urban growth area;

2.

Maximum: sixteen dwelling units per acre within the Grand Mound urban growth area, except that any density greater than fifteen dwelling units per acre shall be obtained only by purchase of transfer of development rights in accordance with Section 20.62.055; and

3.

The maximum number of dwelling units allowed on a site shall be calculated by subtracting all submerged lands as defined in the Shoreline Master Program for the Thurston Region from the area of the parcel and, then applying the allowed zoning density in Section 20.21A.035(1).

(Ord. 11398 § 3 (part), 1997: Ord. 11220 § 2 (part), 1996)

(Ord. No. 14773, § 7(Att. F), 7-24-2012)

20.21A.060 - Design standards.

The following standards are established as the minimum necessary to ensure that the purpose of this residential four to sixteen units per acre district is achieved and maintained as new lots are created and new buildings are constructed:

1.

Minimum lot size:

a.

Conventional subdivision lot—five thousand square feet single-family and duplex;

b.

Cluster subdivision lot—no requirement;

c.

Nonresidential use—twelve thousand five hundred square feet;

2.

Minimum lot width:

a.

Individual lot or conventional subdivision lot:

i.

Interior lot—forty feet;

ii.

Corner lot—forty feet;

iii.

Reserved;

iv.

Cul-de-sac—thirty-five feet;

v.

Flag lot—twenty feet;

b.

Cluster subdivision lot:

i.

Interior lot—twenty feet;

ii.

Corner lot—thirty feet;

c.

Nonresidential uses:

i.

Interior lot—fifty feet;

ii.

Corner lot—fifty feet

3.

Minimum district size for purpose of zoning map amendments—four acres;

4.

Maximum building height—thirty-five feet;

5.

Minimum yard requirements: See Section 20.07.030;

6.

Maximum Coverage by Hard Surfaces: Seventy-five percent (also see Chapter 20.07).

7.

Dedication of Open Space. Land which is to be divided must conform to the open space dedication requirements of Chapter 18.47 of the Subdivision Ordinance.

8.

Grand Mound Design Guidelines: See Chapter 20.36.

(Ord. 12761 § 17, 2002; Ord. 11804 § 66, 1998; Ord. 11653 § 1, 1998: Ord. 11398 § 3 (part), 1997: Ord. 11220 § 2 (part), 1996; Ord. No. 15355, 1(Att. A, § AA), 10-18-2016)

(Ord. No. 16332, § 2(Att. A, § II), 12-12-2023)

20.21A.070 - Conversion plans.

1.

Within the Grand Mound urban growth area, for any land division that is submitted in phases of development, and for any development where sewer is not available, the approval of each phase of development shall be contingent upon the following:

a.

The lots created by the land division for residential and associated uses (e.g., dwelling units; private recreation areas; stormwater detention, treatment and infiltration) shall meet all of the requirements of Section 20.21A.050.

b.

A conversion plan must be submitted for the remaining portion of the site reserved for future phases of development (i.e., reserve tract) which demonstrates that the reserve tract can be subsequently subdivided to create sufficient lots to achieve the minimum densities necessary to comply with Section 20.21A.050. Such conversion plan shall depict a schematic lot layout, approximate location of utility easements, and potential street access and an internal circulation system consistent with county transportation policies. Conversion plans shall not be required to be stamped by an engineer or surveyor, and may be included as part of a drawing or plan submitted for the land division application. Simultaneous with the filing of the conversion plan, the applicant will be required to record with the county auditor, in a form acceptable to the prosecuting attorney, a document to be placed in the chain of title of the property giving constructive notice of the special density requirements relating to the reserve tract. This conversion plan will not bind future phases of development of the site to anything except the obligation to meet the overall density requirements of the total tract. Acceptance of a conversion plan by the county does not, by itself, constitute approval of the granting of vested rights to a future phase of development. (Note: The purpose of the conversion plan is to ensure that the reserve tract can be ultimately developed at the residential densities required for this district, not to limit future development to a specified development scheme. Recognizing that some property subject to this requirement may not be redeveloped in the near future, the time and cost involved in preparing and obtaining approval of a conversion plan should be kept to a minimum.)

2.

A permit to construct any single-family dwelling on a lot of record that is greater than one acre in size shall be contingent on the submission of a conversion plan which demonstrates that the remainder of the lot may be subsequently subdivided to create sufficient lots to achieve the minimum densities necessary to comply with Section 20.21A.050. Such conversion plan shall meet all of the provisions of Section 20.21A.070(1)(b) above.

(Ord. 11398 § 3 (part), 1997: Ord. 11220 § 2 (part), 1996)

20.21A.080 - Additional regulations.

Refer to the following chapters for provisions which may qualify or supplement the regulations presented above:

1.

Chapter 20.32, Open Space;

2.

Chapter 20.34, Accessory Uses and Structures;

3.

Chapter 20.36, Grand Mound Design Guidelines

4.

Chapter 20.37, Site Plan Review;

5.

Chapter 20.40, Signs and Lighting;

6.

Chapter 20.44, Parking and Loading;

7.

Chapter 20.45, Landscaping and Screening.

(Ord. 11804 § 67, 1998: Ord. 11398 § 3 (part), 1997: Ord. 11220 § 2 (part), 1996)

(Ord. No. 16332, § 2(Att. A, § II), 12-12-2023)