20 STANDARDS FOR SPECIFIC LAND USES
Table 20 Development Standards for Attached and Detached Accessory Dwelling Units (ADUs) and Junior Accessory Dwelling Units (JADUs) | |||
|---|---|---|---|
Development Standard | Junior Accessory Dwelling Unit | Attached Accessory Dwelling Unit | Detached Accessory Dwelling Unit |
Number of ADUs/JADUs New or Existing Single-Family Dwelling1 | 1 | 1 | 1 |
Number of ADUs New Multifamily | N/A | 1 | 1 |
Maximum Size | 500 square feet | 1,200 square feet | 1,200 square feet |
Site Coverage | N/A | See Table 20a Exception: ADUs 850 square feet or less are not subject to the maximum site coverage requirements of the underlying zoning. | |
Height2 | See Table 20a | See Table 20a Exception: ADUs located within required rear and side yard of the zoning district cannot exceed two stories or 25 feet. | Two stories or 25 feet |
Setbacks3 | |||
Front | N/A | See Table 20a | See Table 20a |
Interior Side | N/A | 4 feet | 4 feet |
Street Side | N/A | 4 feet | 4 feet |
Rear | N/A | 4 feet | 4 feet |
Parking Spaces: On Site | |||
Accessory Dwelling Unit | N/A | 0 | 0 |
Junior Accessory Dwelling Unit | 0 | N/A | N/A |
Replacement Parking for Primary Dwelling Garage or Covered Parking Conversion | 0 | 0 | 0 |
Notes: |
|---|
1. One JADU and one attached or detached ADU is allowed. |
2. An ADU located over a detached accessory building may exceed the maximum height stated in HMC § 20.16.030 (Accessory structures), up to two stories or 25 feet, and the maximum required interior side and rear setbacks are four feet as noted in Table 20. |
3. No setback shall be required for an existing living area or accessory structure or a structure constructed in the same location and to the same dimensions as an existing structure that is converted to an accessory dwelling unit or to a portion of an accessory dwelling unit. |
4. If any one of the following standards set forth in Table 20: maximum size and/or lot coverage would prohibit the issuance of a building permit for an accessory dwelling unit, the applicant for said building permit will be entitled to a permit for an 850-square-foot accessory dwelling unit that is 16 feet high, with four-foot side and rear yard setbacks. |
Table 20a Development Standards: Front Setback, Site Coverage, Height for Specific Zoning Districts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Development Standard by Zone | R-1-3.5* | R-1-6 | R-1-12.5 | R-1-20 and 40 | RM | DR | PR and CD | CS | MU | GMU |
Front setback | 20' | 20' | 25' | 30' | 20' | 20' | None | None | None | 30' |
Site coverage | 50% | 35% | 30% | 25% | 40% | 40% | 100% | 60% | 60% | 30% |
Height** | 35' except 25' for small lot subdivisions | 40' | 35' | 35' when abutting or across street or alley from R-1 zone | 35' abutting/across street or alley from zone allowing single- family as permitted use | 35' | ||||
*20' setback for garage frontage. Non-garage frontage: 10' | 40' when abutting zone allowing multifamily as primary use to include RM, ORM, RMP, DR | 40' abutting/across street or alley from zone allowing multi-family as permitted use | ||||||||
**Exceptions to this requirement are prescribed in HMC § 20.16.065 | 50' in all other instances | 50' in all other instances | ||||||||
Notes: |
|---|
If any one of the standards set forth in Table 20a would prohibit the issuance of a building permit for an accessory dwelling unit, the applicant for said building permit will be entitled to a permit for an 850-square-foot accessory dwelling unit that is 16 feet high, with four-foot side and rear yard setbacks. |
Table 21 Average Dwelling Size in Small Lot Subdivisions | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Square Feet (can be interpolated) | |||||||||
Average Lot Size | 2,000 | 2,500 | 3,000 | 3,500 | 4,000 | 4,500 | 5,000 | 5,500 | 6,000 |
Average Dwelling Size | 1,000 | 1,100 | 1,200 | 1,300 | 1,400 | 1,500 | 1,600 | 1,700 | 1,800 |
20 STANDARDS FOR SPECIFIC LAND USES
Table 20 Development Standards for Attached and Detached Accessory Dwelling Units (ADUs) and Junior Accessory Dwelling Units (JADUs) | |||
|---|---|---|---|
Development Standard | Junior Accessory Dwelling Unit | Attached Accessory Dwelling Unit | Detached Accessory Dwelling Unit |
Number of ADUs/JADUs New or Existing Single-Family Dwelling1 | 1 | 1 | 1 |
Number of ADUs New Multifamily | N/A | 1 | 1 |
Maximum Size | 500 square feet | 1,200 square feet | 1,200 square feet |
Site Coverage | N/A | See Table 20a Exception: ADUs 850 square feet or less are not subject to the maximum site coverage requirements of the underlying zoning. | |
Height2 | See Table 20a | See Table 20a Exception: ADUs located within required rear and side yard of the zoning district cannot exceed two stories or 25 feet. | Two stories or 25 feet |
Setbacks3 | |||
Front | N/A | See Table 20a | See Table 20a |
Interior Side | N/A | 4 feet | 4 feet |
Street Side | N/A | 4 feet | 4 feet |
Rear | N/A | 4 feet | 4 feet |
Parking Spaces: On Site | |||
Accessory Dwelling Unit | N/A | 0 | 0 |
Junior Accessory Dwelling Unit | 0 | N/A | N/A |
Replacement Parking for Primary Dwelling Garage or Covered Parking Conversion | 0 | 0 | 0 |
Notes: |
|---|
1. One JADU and one attached or detached ADU is allowed. |
2. An ADU located over a detached accessory building may exceed the maximum height stated in HMC § 20.16.030 (Accessory structures), up to two stories or 25 feet, and the maximum required interior side and rear setbacks are four feet as noted in Table 20. |
3. No setback shall be required for an existing living area or accessory structure or a structure constructed in the same location and to the same dimensions as an existing structure that is converted to an accessory dwelling unit or to a portion of an accessory dwelling unit. |
4. If any one of the following standards set forth in Table 20: maximum size and/or lot coverage would prohibit the issuance of a building permit for an accessory dwelling unit, the applicant for said building permit will be entitled to a permit for an 850-square-foot accessory dwelling unit that is 16 feet high, with four-foot side and rear yard setbacks. |
Table 20a Development Standards: Front Setback, Site Coverage, Height for Specific Zoning Districts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Development Standard by Zone | R-1-3.5* | R-1-6 | R-1-12.5 | R-1-20 and 40 | RM | DR | PR and CD | CS | MU | GMU |
Front setback | 20' | 20' | 25' | 30' | 20' | 20' | None | None | None | 30' |
Site coverage | 50% | 35% | 30% | 25% | 40% | 40% | 100% | 60% | 60% | 30% |
Height** | 35' except 25' for small lot subdivisions | 40' | 35' | 35' when abutting or across street or alley from R-1 zone | 35' abutting/across street or alley from zone allowing single- family as permitted use | 35' | ||||
*20' setback for garage frontage. Non-garage frontage: 10' | 40' when abutting zone allowing multifamily as primary use to include RM, ORM, RMP, DR | 40' abutting/across street or alley from zone allowing multi-family as permitted use | ||||||||
**Exceptions to this requirement are prescribed in HMC § 20.16.065 | 50' in all other instances | 50' in all other instances | ||||||||
Notes: |
|---|
If any one of the standards set forth in Table 20a would prohibit the issuance of a building permit for an accessory dwelling unit, the applicant for said building permit will be entitled to a permit for an 850-square-foot accessory dwelling unit that is 16 feet high, with four-foot side and rear yard setbacks. |
Table 21 Average Dwelling Size in Small Lot Subdivisions | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Square Feet (can be interpolated) | |||||||||
Average Lot Size | 2,000 | 2,500 | 3,000 | 3,500 | 4,000 | 4,500 | 5,000 | 5,500 | 6,000 |
Average Dwelling Size | 1,000 | 1,100 | 1,200 | 1,300 | 1,400 | 1,500 | 1,600 | 1,700 | 1,800 |