18.30.030 Densities and dimensions – Residential zones

18.30.030 Densities and dimensions – Residential zones.

STANDARDS	ZONES
	RESIDENTIAL
	R-1 (14) Urban Separator	R-4	R-6	R-8	R-12	R-18	MR
Base density: dwelling units/acre (15)	1 du/ac	4 du/ac	6 du/ac	8 du/ac	12 du/ac	18 du/ac (18)	14 du/ac
Maximum density: dwelling unit/acre (1)		6 du/ac	9 du/ac	12 du/ac	18 du/ac	24 du/ac	50 du/ac
Minimum density (2) (15)		85% (12)	85% (12)	85% (12)	85% (12)	85% (12)	85% (12)
Minimum lot area (3)	2,500 sf	2,500 sf	2,500 sf	2,500 sf	2,500 sf (3)	2,500 sf (3)	2,500 sf (3)
Minimum lot width (3)	35 ft (7)	30 ft	30 ft	30 ft	30 ft	30 ft	30 ft
Minimum street setback (3)	20 ft (7)	10 ft (8)	10 ft (8)	10 ft (8)	10 ft (8)	10 ft	10 ft
Minimum interior setback (3) (13) (20)	7 ft 6 inches (7)	7 ft 6 inches	7 ft 6 inches	7 ft 6 inches	5 ft (19)	10 ft	5 ft (19)
Base height (4)	35 ft	35 ft	35 ft 45 ft (11)	35 ft 45 ft (11)	35 ft 45 ft (11)	35 ft	60 ft
Maximum impervious surface: percentage (5)	30% (16)	55%	70%	75%	75% (3)	75%	80% (3)

(1) This maximum density may be achieved only through the application of residential density incentives in accordance with Chapter 18.90 CMC or transfers of density credits in accordance with Chapter 18.95 CMC, or any combination of density incentive or density transfer. Maximum density may only be exceeded in accordance with CMC 18.90.040(6)(a)(vii). Within the Lakepoint Urban Village¹ subarea, this condition shall not apply.

(2) Also see CMC 18.30.060.

(3) These standards may be modified under the provisions for zero-lot-line and townhouse developments.

(4) Height limits may be increased if portions of the structure that exceed the base height limit provide one additional foot of street and interior setback for each foot above the base height limit, but the maximum height may not exceed 75 feet. Wireless communication facilities, including licensed amateur (HAM) radio stations and citizen band stations, shall not exceed the zone’s base height limit unless allowed pursuant to the provisions of Chapter 18.70 CMC or a height modification is granted pursuant to CMC 18.70.150. Netting or fencing and support structures for the netting or fencing used to contain golf balls in the operation of golf courses or golf driving ranges are exempt from the additional interior setback requirements but the maximum height shall not exceed 75 feet.

(5) Applies to each individual lot.

Impervious surface area standards for:

(a) Regional uses shall be established at the time of permit review;

(b) Nonresidential uses in residential zones, except those located within the MR zone, shall comply with CMC 18.30.140 and 18.30.250;

(c) Individual lots in the R-4 through R-6 zones that are less than 9,076 square feet in area shall be subject to the applicable provisions of the nearest comparable R-6 or R-8 zone; and

(d) A lot may be increased beyond the total amount permitted in this chapter subject to approval of a conditional use permit.

(6) Mobile home parks shall be allowed a base density of six dwelling units per acre.

(7) The standards of the R-4 zone shall apply if a lot is less than 15,000 square feet in area.

(8) At least 20 linear feet of driveway shall be provided between any garage, carport or other fenced parking area and the street property line or back of sidewalk if any portion of the sidewalk has been included in an easement. The linear distance shall be measured along the center line of the driveway from the access point to such garage, carport or fenced area to the street property line.

(9) Intentionally left blank.

(10) Intentionally left blank.

(11) The base height to be used only for projects as follows:

(a) In R-6, R-8 and R-12 zones, a building with a footprint built on slopes exceeding a 15 percent finished grade.

(12) Density applies only to dwelling units and not to sleeping units.

(13) Vehicle access points from garages, carports or fenced parking areas shall be set back from the property line on which a joint use driveway is located to provide a straight line length of at least 26 feet as measured from the center line of the garage, carport or fenced parking area, from the access point to the opposite side of the joint use driveway.

(a) All subdivisions and short subdivisions in the R-1 zone shall be required to be clustered if the property is located within or contains:

(i) A floodplain;

(ii) A critical aquifer recharge area;

(iii) A regionally or locally significant resource area;

(iv) Existing or planned public parks or trails, or connections to such facilities;

(v) A Class I or II stream or wetland;

(vi) A steep slope; or

(vii) A greenbelt/urban separator or wildlife corridor area designated by the comprehensive plan or a community plan.

(b) The development shall be clustered away from sensitive areas or the axis of designated corridors such as urban separators or the wildlife habitat network to the extent possible and the open space shall be placed in a separate tract that includes at least 50 percent of the site. Open space tracts shall be permanent and shall be dedicated to a homeowners’ association or other suitable organization, as determined by the Director, and meet the requirements in CMC 18.35.040. On-site sensitive area and buffers, wildlife habitat networks, required habitat and buffers for protected species and designated urban separators shall be placed within the open space tract to the extent possible. Passive recreation (with no development of recreational facilities) and natural-surface pedestrian and equestrian trails are acceptable uses within the open space tract.

(15) See CMC 18.30.090.

(16) All subdivisions and short subdivisions in the R-1 zone shall have a maximum impervious surface area of eight percent of the gross acreage of the plat. Distribution of the allowable impervious area among the platted lots shall be recorded on the face of the plat. Impervious surface of roads need not be counted towards the allowable impervious area. Where both lot- and plat-specific impervious limits apply, the more restrictive shall be required.

(17) Intentionally left blank.

(18) Except cottage housing, which may have a base density of 12 du/acre.

(19) Minimum interior setback for underground parking structures is zero feet.

(20) See CMC 18.30.200 for projections and structures allowed within interior setbacks. (Ord. 03-16 § 1 (Exh. A); Ord. 03-14 § 1; Ord. 01-14 § 1 (Exh. A); Ord. 09-12 § 2 (Exh. B); Ord. 10-10 § 3 (Exh. C); Ord. 60-03 § 2; Ord. 57-03 § 2; Ord. 42-02 § 2 (21A.12.030))