Chapter 21.42
RESIDENTIAL DESIGN STANDARDS

Sections:

21.42.010    Purpose.

21.42.020    General layout standards.

21.42.030    Lot segregations – Zero lot line development.

21.42.040    Repealed.

21.42.050    Townhome development.

21.42.060    Attached dwellings and group residences – Applicability.

21.42.070    Attached dwellings and group residences – Design standards.

21.42.080    Attached dwellings and group residences – Vehicular access and parking location.

21.42.090    Attached dwellings and group residences – Building facade modulation.

21.42.100    Attached dwellings and group residences – Roofline variation.

21.42.110    Easements – Regional utility corridors.

21.42.120    Mobile home parks – Standards for existing parks.

21.42.130    Mobile home parks – Standards for new parks.

21.42.140    Mobile home parks – Alternative design standards.

21.42.010 Purpose.

The purpose of this chapter is to improve the quality of urban development by providing building and site design standards that:

(1) Reduce the visual impact of large residential buildings from adjacent streets and properties;

(2) Enhance the aesthetic character of large residential buildings;

(3) Contain sufficient flexibility of standards to encourage creative and innovative site and building design; and

(4) Meet the on-site recreation needs of project residents. (Ord. 611 § 8 (Att. A), 2016)

21.42.020 General layout standards.

For residential developments in the R zones:

(1) The maximum length of blocks shall be 1,320 feet.

(2) Except for corner lots, lots for single detached dwellings shall not have street frontage along two sides unless one of said streets is a neighborhood collector street or an arterial street.

(3) The layout of residential developments should not result in new residences facing arterial streets whenever practical. The Development Services Director may require that roads internal to a new subdivision or short plat be designed to provide access to homes in lieu of those homes gaining access onto an arterial street. (Ord. 611 § 8 (Att. A), 2016)

21.42.030 Lot segregations – Zero lot line development.

In addition to the allowances under residential cluster development set forth in WMC 21.92.100 in any R zone, interior setbacks may be modified to allow for zero lot line development during subdivision or short subdivision review as follows:

(1) If a building is proposed to be located within a required interior setback:

(a) An easement shall be provided on the abutting lot of the subdivision that is wide enough to ensure a 10-foot separation between the exterior walls of buildings on adjoining lots, except as provided to allow for common wall zero lot line construction;

(b) The easement area shall be free of structures and other obstructions that would prevent normal repair and maintenance of the structure’s exterior;

(c) Buildings utilizing zero lot line development setbacks shall not have doors that open directly onto the private yard areas of abutting property. Windows in such buildings shall not be oriented toward such private yard areas unless they consist of materials such as glass block, textured glass, or other opaque materials, and shall not be capable of being opened, except for clerestory-style windows or skylights; and

(d) The final plat or short plat for recording shall show the approximate location of buildings having zero lot line development.

(2) In the R zones, setbacks on existing individual lots may be modified; provided, that the standards set forth in subsection (1)(a) of this section are met. (Ord. 720 § 19, 2021; Ord. 611 § 8 (Att. A), 2016)

21.42.040 Lot segregations – Clustered development.

Repealed by Ord. 720. (Ord. 611 § 8 (Att. A), 2016)

21.42.050 Townhome development.

In the R-4 through R-8 zones, a building that contains a grouping of attached townhome units shall not exceed a 120-foot maximum length without a separation of at least 20 feet from other groupings or rows of townhomes. (Ord. 611 § 8 (Att. A), 2016)

21.42.060 Attached dwellings and group residences – Applicability.

The standards of WMC 21.42.070 through 21.42.100 shall apply to all new apartment developments exceeding four dwelling units, new townhome development and new group residences (community residential facilities) with more than four units. Expansions of existing development that involve four or more dwelling units shall be subject to compliance with WMC 21.42.080 to 21.42.100. (Ord. 611 § 8 (Att. A), 2016)

21.42.070 Attached dwellings and group residences – Design standards.

(1) Attachment A of Ordinance 302*, Multi-family Design Guidelines, is hereby adopted by this reference as if set forth in full.

(2) New townhomes, apartments, and group residences of more than four dwelling units shall be subject to the City’s adopted design standards for multifamily developments. (Ord. 611 § 8 (Att. A), 2016)

*Code reviser’s note: Ordinance 572, Section 5 amends Attachment A of Ordinance 302. Attachment A of Ord. 302 is further amended by Section 39 of Ord. 706.

21.42.080 Attached dwellings and group residences – Vehicular access and parking location.

(1) On sites abutting an alley constructed to a width of at least 20 feet, apartment and townhome development and all group residences except community residential facilities shall have parking areas placed to the rear of buildings with primary vehicular access via the alley, except when waived by the Development Services Director due to physical site limitations.

(2) When alley access is provided, no additional driveway access from the public street shall be allowed except as necessary to access parking under the structure.

(3) When common parking facilities for attached dwellings and group residences exceed 30 spaces, no more than 50 percent of the required parking shall be permitted between the street property line and any building, except when authorized by the Development Services Director due to physical site limitations. (Ord. 611 § 8 (Att. A), 2016)

21.42.090 Attached dwellings and group residences – Building facade modulation.

Apartment and townhome developments and all group residences shall provide building facade modulation on facades exceeding 60 feet in length. The following standards shall apply:

(1) The maximum wall length without modulation shall be 30 feet;

(2) The minimum modulation depth shall be three feet; and

(3) The minimum modulation width shall be eight feet. (Ord. 611 § 8 (Att. A), 2016)

21.42.100 Attached dwellings and group residences – Roofline variation.

Apartments and townhome developments and all group residences shall provide roofline variation on rooflines exceeding 60 feet according to the following standards:

(1) The maximum roof length without variation shall be 30 feet;

(2) The minimum horizontal or vertical offset shall be three feet;

(3) The minimum variation length shall be eight feet; and

(4) Roofline variation shall be achieved using one or more of the following methods:

(a) Vertical off-set in ridge line;

(b) Horizontal off-set in ridge line;

(c) Variations of roof pitch;

(d) Gables;

(e) False facades; or

(f) Any other technique approved by the Development Services Director that achieves the intent of this section. (Ord. 611 § 8 (Att. A), 2016)

21.42.110 Easements – Regional utility corridors.

(1) In subdivisions and short subdivisions, areas used as regional utility corridors shall be contained in separate tracts.

(2) In other types of land development permits, easements shall be used to delineate such corridors. (Ord. 611 § 8 (Att. A), 2016)

21.42.120 Mobile home parks – Standards for existing parks.

(1) Mobile home parks established prior to the effective date of this code shall continue to be governed by all standards relating to density, setbacks, landscaping and off-street parking in effect at the time they were approved.

(2) Placement of new accessory structures and replacement mobile homes, either standard or nonstandard, in these mobile home parks shall be governed by the dimensional standards in effect when the parks were approved, unless two or more replacement mobile homes are proposed to be installed adjacent to each other under the flexible setback option set forth in WMC 21.42.140. Where internal setbacks are not specified, the average of the prevailing setbacks on the pads to either side of the proposed new or replacement structure shall apply.

(3) No spaces or pads in an existing mobile home park shall be used to accommodate recreational vehicles (RVs), except when the spaces or pads were specifically for RVs at the time the park was established.

(4) An existing mobile home park may be enlarged; provided the proposed enlargement meets the standards set forth in WMC 21.42.130 and 21.42.140.

(5) Both insignia and noninsignia mobile homes may be installed in established parks; provided, that all mobile homes supported by piers shall be fully skirted, and that nonstandard mobile homes shall meet the minimum livability and safety requirements set forth in the Uniform Building Code. (Ord. 611 § 8 (Att. A), 2016)

21.42.130 Mobile home parks – Standards for new parks.

New mobile home parks shall be developed subject to the following standards:

(1) A mobile home park shall be at least three acres in area;

(2) The allowable residential density in a mobile home park shall be the base density of the zone in which the park is located;

(3) Both insignia and noninsignia mobile homes may be installed in mobile home parks; provided, that noninsignia mobile homes shall meet the minimum livability and safety requirements set forth in the Uniform Building Code;

(4) A mobile home park shall be exempt from the building coverage and impervious surface limits set forth in Chapter 21.22 WMC;

(5) At least one of the off-street parking spaces required for each mobile home shall be located on or adjacent to each mobile home pad;

(6) Internal roads and sidewalks shall provide access to each mobile home space and shall be constructed in accordance with the adopted City of Woodinville street standards for residential minor access streets;

(7) There shall be a minimum of 10 feet of separation maintained between all mobile homes on the site, unless the flexible setback option set forth in WMC 21.42.140 is used. Accessory structures shall be located no closer than:

(a) Ten feet to mobile homes on adjacent spaces, unless constructed of noncombustible materials, in which case the minimum setback shall be five feet;

(b) Five feet to accessory structures of mobile homes on adjacent spaces; and

(c) Five feet to the mobile home or other accessory structures on the same space, except a carport or garage may be attached to the mobile home, and the separation may be waived when such structures are constructed of noncombustible materials;

(8) All mobile homes and RVs supported by piers shall be fully skirted; and

(9) A mobile home park may include a storage area for RVs owned by residents of the park; provided the storage area contains no utility hook-ups and no RV within the storage area shall be used as living quarters. (Ord. 611 § 8 (Att. A), 2016)

21.42.140 Mobile home parks – Alternative design standards.

As an alternative to the building separation and internal street standards of WMC 21.42.130:

(1) Building separation requirements or setbacks between mobile homes and accessory structures on adjacent spaces may be modified, provided:

(a) The common walls meet the fire protection standards set forth in Chapter 21.62 WMC, Building Codes, and the standards set forth in the Fire Code, for duplexes, multifamily and condominium developments, as applicable; and

(b) Rental agreement clauses, bylaws or other legal mechanisms stipulate maintenance responsibilities for structures, fences and yards;

(2) Private streets may be used with a minimum driving surface of 22 feet in width, provided:

(a) The streets comply in all other respects with the City of Woodinville adopted street standards;

(b) All required parking is located off-street and as specified in WMC 21.42.130(5); and

(c) Such streets shall not:

(i) Directly connect two or more points of vehicular access to the park; or

(ii) Serve over 100 dwelling units within the park. (Ord. 611 § 8 (Att. A), 2016)