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Morgan Hill CA ADU Guidelines

Accessory Dwelling Unit (ADU) City Regulations

Zoning:

Allowable Urban Districts: O-S/CC-R/R-2/R-1/R-E

Lot Size:

O-S: 5+ acres

CC-R: 6,000 sq.ft. min.

R-2 (3,500): 6,000 sq.ft. min.

R-1 (4,500): 6,000 sq.ft. min.

R-1 (7,000): 7,000 sq.ft. min.

R-1 (9,000): 9,000 sq.ft. min.

R-1 (12,000): 12,000 sq.ft. min.

R-1 (20,000): 20,000 sq.ft. min.

R-E (40,000): 40,000 sq.ft. min.

R-E (100,000): 100,000 sq.ft. min.

ADU Floor Area:

CC-R, R-2(3,500), R-1 (4,500), R-1 (7,000), R-1 (9,000) and R-1 (12,000) districts: 600 sq.ft. max

R-1 (20,000) districts: 700 sq.ft. max

R-E (40,000) district: 900 sq.ft. max

R-E (100,000) and O-S districts: 1,000 sq.ft. max

Attached ADUs shall not exceed 30% of existing living area

No. of Bedrooms:  

Maximum 2 bedrooms.

Storage / Closet:

No minimum/maximum.

Kitchen / Bath:  

Require separate kitchen facilities (permanent range, counters, refrigerator, and sink) and bathroom.  Detached secondary dwelling units shall provide separate and independent septic tank sewage disposal systems. All leach lines shall be designed and installed in accordance with Bulletin A, "Septic Tank Sewage Disposal System," or other current septic system requirements issued by the Santa Clara County Environmental Health Services. This provision shall only apply in areas of city where septic tank disposal systems are allowed due to lack of sanitary sewer lines.

In other areas of the city, the second unit shall be connected to the sanitary sewer system through the existing lateral line serving primary dwelling unit.

Parking:

At least one space for a studio or one-bedroom secondary unit and a minimum of two spaces for secondary dwelling unit containing two bedrooms, in addition to those required for the primary dwelling unit.

Off-street parking spaces for secondary dwelling unit may be uncovered. Secondary dwelling parking may be located on the front, side or rear yard areas.

Setbacks:  

Detached ADUs must conform to the building setback and FAR or lot coverage limitations for the applicable zoning district.

Height:

The design of the secondary dwelling unit shall be compatible with the design and scale of the existing dwelling (using substantially the same landscaping, color, materials, and design on the exterior) and the general character of the neighboring residential properties.

Location:

Secondary dwelling units may be either detached or attached to primary dwelling unit on the property. Detached ADUs must be located at least 6' from the primary dwelling.

Rear Yard Coverage:

Must follow requirements established by the zoning district in which lot is located.

Materials / Design:

The design of secondary dwelling unit shall be compatible with design and scale of existing dwelling (using substantially the same landscaping, color, materials and design on exterior) and the general character of neighboring residential properties.

Entryways:

N/A

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