Main Component of the Project
Residential Addition/Accessory Structure
815 Autumn Lane
Mill Valley, CA 94941
Parcel Number: 049-212-14
The applicant requests Variance and Second Unit approval to construct a new 442 square foot addition to a 2,455 square foot house. The 442 square feet of proposed development would result in a floor area ratio of over 30 percent on the 9,525 square foot lot. The proposed building would reach a maximum height of 12 feet, 6¾ inches above surrounding grade and would have the following setbacks from the exterior walls: 25 feet from the east front property line; 12 feet from the north side property line; 12 feet 9 inches from the south side property line; 4 feet from the west rear property line.
Variance approval is required because the project is proposing additional floor area to be added to existing underfloor area within the rear setback of the property. An accessory dwelling unit permit is required because the project also proposes to add an accessory dwelling unit in the underfloor area of the existing house.
Zoning: R1-B1 (single-family Residential, 6,000 sq.ft. minimum lot area)
Countywide Plan Designation: SF6 (Single-family, 4-7 units/acre)
Community Plan (if applicable): Tamalpais Community Plan