Pemberton Design Review (P1958)

Community Development Agency


Main Component of the Project

Residential Addition/Accessory Structure


313 Sheffield Avenue
Mill Valley, CA 94941
Parcel Number: 050-121-09



Project Planner

Sabrina Sihakom


Chris Pemberton and C. Sumanik

Project Description

The project is a proposal to convert an existing, unfinished utility room into 232 square feet of additional floor area within the footprint of an existing 1,943 square-foot 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 2,180 square feet which would result in a floor area ratio of 32.7 percent. The existing height of the building is 24 feet from surrounding grade and would not change as a result of this project. 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 requires Design Review approval pursuant to 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.

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

Most Recent Project Plans

Pemberton Plans 041718

Public Notice

View the Public Notice - This is the Notice and Referral of Planning Application.

Administrative Decisions

View the Administrative Decision