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A. Purpose. The purpose of this section is to encourage development of affordable housing by providing density bonus, dimensional standard modification, and modification of other requirements for affordable housing projects.

B. Definitions.

1. Mixed-income multifamily development” means a multifamily development project that includes both market rate and affordable housing units.

2. Religious organization” means the federally protected practice of a recognized religious assembly, school, or institution that owns or controls real property as defined in RCW 35A.63.300, now or as hereafter amended.

C. Applicable Procedures. An application to utilize the provisions of this section shall be processed through the required land use review for the project. If a land use approval is not required for the project, the application shall be processed through the Building Permit review.

D. Eligibility. The following residential development, including both new development and rehabilitation projects, shall be eligible to receive a density bonus and other modifications as provided in this section:

1. Mixed-Income Multifamily Development. Mixed-income multifamily development in any applicable land use district when the development includes affordable housing; and

2. Affordable Housing Development. The following ownerships and locations of residential development when all housing units are affordable housing:

a. Owned by a religious organization and located in Single-Family Residential Land Use Districts; and

b. Owned by a religious organization, nonprofit organization, or public agency, except for Bellevue Parks Department, Bellevue Community Development Department, or any public utility entity, and located in all land use districts in which multifamily dwellings are permitted.

E. Density Bonus.

1. Mixed-income multifamily development as provided in subsection D.1 of this section may exempt 1 bonus market rate unit for each equivalent-sized affordable unit provided, up to 15 percent above the maximum density allowed in the underlying land use district.

2. Affordable housing development as provided in subsection D.2 of this section may receive a bonus of 50 percent above the maximum density allowed in the underlying land use district.

F. Dimensional Standard Modification.

1. Mixed-Income Multifamily Development as provided in subsection D.1 of this section may replace the dimensional requirements in LUC Chart 20.20.010 with Chart 20.20.128.F.1. Applicable dimensional requirements in LUC Chart 20.20.010 but not included in Chart 20.20.128.F.1 shall continue to apply, including applicable footnotes.

Chart 20.20.128.F.1 Modified Dimensional Requirements for Mixed-Income Multifamily Development

Residential

LAND USE CLASSIFICATION

R-1

R-1.8

R-2.5

R-3.5

R-4

R-5

R-7.5

R-10

R-15

R-20

R-30

DIMENSIONS

Minimum Lot Area (Thousands of Sq. Ft.)

30.4

17.4

11.7

8.7

7.4

6.3

4.1

8.5

8.5

8.5

8.5

Dwelling Units per Acre

1.2

2.1

2.9

4.0

4.6

5.8

8.6

11.5

17.3

23.0

34.5

Maximum Lot Coverage by Structures (percent)

35

35

35

35

40

40

40

40

40

40

40

Maximum Hard Surface Coverage (percent)

75

75

75

75

80

80

90

90

90

90

90

Maximum Impervious Surface (percent)

45

45

45

45

55

55

55

70

70

70

70

Residential – Nonresidential Districts

LAND USE CLASSIFICATION

O

OLB

OLB 2

NB

CB

F2

F3

DIMENSIONS

Dwelling Units per Acre

23.0

34.5

17.3

34.5

34.5

34.5

Maximum Lot Coverage by Structures (percent)

40%

40%

40%

50%

40%

40%

Maximum Building Height

45

60

75

30

60

75

75/135

Floor Area Ratio

1.15

2. Affordable housing development as provided in subsection D.2 of this section may replace the dimensional requirements in LUC Chart 20.20.010 with Chart 20.20.128.F.2. Applicable dimensional requirements in LUC Chart 20.20.010 but not included in Chart 20.20.128.F.2 shall continue to apply, including applicable footnotes.

Table 20.20.128.F.2. Modified Dimensional Requirements for Affordable Housing Development

Residential

LAND USE CLASSIFICATION

R-1

R-1.8

R-2.5

R-3.5

R-4

R-5

R-7.5

R-10

R-15

R-20

R-30

DIMENSIONS

Minimum Lot Area (Thousands of Sq. Ft.)

23.3

13.3

9.0

6.7

5.7

4.8

3.1

8.5

8.5

8.5

8.5

Dwelling Units per Acre

1.5

2.7

3.8

5.3

6.0

7.5

11.3

15.0

22.5

30.0

45.0

Maximum Lot Coverage by Structures (percent)

35

35

35

40

40

40

40

40

40

40

40

Maximum Hard Surface Coverage (percent)

75

75

75

75

80

80

90

90

90

90

90

Maximum Impervious Surface (percent)

45

45

45

55

55

55

65

70

70

70

70

Residential – Nonresidential Districts

LAND USE CLASSIFICATION

O

OLB

OLB 2

NB

CB

F2

F3

DIMENSIONS

Dwelling Units per Acre

30.0

45.0

22.5

45.0

45.0

45.0

Maximum Lot Coverage by Structures (percent)

40%

40%

40%

50%

40%

40%

Maximum Building Height

45

60

75

30

60

75

75/135

Floor Area Ratio

1.5

G. Modification of Other Applicable Requirements. For eligible residential development as provided in as provided in subsection D of this section, the following requirements of this Code may be modified through the procedures outlined in subsection C of this section, to the extent necessary to accommodate affordable housing units on site:

1. Parking Requirements. The percent of compact parking stalls may be increased up to 75 percent of the total required parking. Tandem parking stalls are permitted to the extent feasible to satisfy required parking ratios.

2. Building Height. Except in transition areas and the Shoreline Overlay District, the maximum building height in R-10, R-15, R-20, and R-30 Land Use Districts may be increased by up to 12 feet for those portions of the building(s) at least 20 feet from any property line.

3. Open Space. The open and recreation space requirement within a residential planned unit development may be reduced to 35 percent of gross land area. All other requirements of LUC 20.30D.160 shall continue to apply.

H. Attached Housing Within Subdivisions. Affordable housing development as provided in subsection D.2 of this section may be permitted as attached multifamily dwelling units in single-family land use districts when meeting the following criteria:

1. The attached multifamily dwelling units shall be reviewed through a subdivision, Chapter 20.45A LUC, or short subdivision, Chapter 20.45B LUC, process, provided nothing in this subsection shall affect the allowance to build attached multifamily dwelling units through a planned unit development, Part 20.30D LUC;

2. Multifamily dwelling units within a subdivision or short subdivision may be considered as unit lot subdivision, with each lot accommodating attached multifamily dwelling units as a parent lot and individual unit lots created for the attached multifamily dwelling unit, and shall also be reviewed for compliance with LUC 20.45A.065 for subdivisions or LUC 20.45B.057 for short subdivisions;

3. A proposal to create a Unit Lot Subdivision with a Parent Lot and Unit Lots may be reviewed as part of a single proposal for a subdivision or short subdivision;

4. An attached multifamily dwelling unit shall not be placed on or across any parent lot line within the subdivision or short subdivision;

5. The attached multifamily dwelling units may only be duplexes and triplexes;

6. No more than 50 percent of the units within the subdivision or short subdivision shall be attached multifamily dwelling units; and

7. The attached multifamily dwelling structure shall comply with all applicable dimensional requirements. (Ord. 6626, 12-6-21, § 6)