Main Component of the Project
Residential Addition/Accessory Structure
313 Sheffield Avenue
Mill Valley, CA 94941
Parcel Number: 050-121-09
Chris Pemberton and C. Sumanik
The applicant is requesting Design Review approval to convert an existing, unfinished utility room into 232 square feet of additional floor area within the footprint of an existing single-family residence on a 6,661 square-foot lot in Mill Valley. The proposed development would result in a building area of 2,578 square feet, and a floor area of 4,624 square feet which would result in a floor area ratio of 32.7 percent. The maximum height of the building is proposed to remain 26 feet from surrounding grade. The addition is proposed to be located within the footprint of the existing residence which is located approximately 27 feet from the western front property line; 4 feet, 9 from the southern side property line; 8 feet, 11 ½ inches from the northern side property line; and 23 feet from the eastern rear property line.
The project meets Variance Waiver criteria per Section 22.54.045 of the Marin County Development Code, because the project is within the footprint of a legal structure constructed prior to January 1, 2012, and the floor area does not exceed 0.35 maximum or 300 square feet. The variance shall then be waived and the project shall instead be subject to Design Review approval.
Zoning: R1:B1 (Residential, Single-Family, 6,000 square feet minimum lot size)
Countywide Plan Designation: SF6 (Single-family, 4-7 units/acre)
Community Plan (if applicable): Tamalpais Community Plan