Project Description
The applicant requests Design Review approval to construct a 2,023-square-foot two-story addition to an existing 3,167-square-foot primary residence and a 540-square-foot detached garage on a developed property located in the unincorporated community of Greenbrae. The 2,023-square-foot addition to the residence would include a 1,108-square-foot addition to the first floor and a 915-square-foot addition to the second floor of the existing residence. The 2,563 square feet of the proposed development would result in a building area of 5,730 square feet, a floor area of 5,190 square feet, and a floor area ratio of 29.6 percent on the 17,510 square foot lot.
The proposed addition to the primary residence appears to reach a maximum height of 33 feet, 8 inches above the surrounding grade and the exterior walls appear to have the following setbacks: 42 feet, 7 inches from the southern front property line; 9 feet, 6 inches from the eastern side property line; 10 feet from the western side property line; and 63 feet, 6 inches from the northern rear property line. The proposed detached garage appears to reach a maximum height of 22 feet, 7 inches above the surrounding grade and the exterior walls appear to have the following setbacks: 8 feet from the southern front property line; 3 feet from the eastern side property line; 64 feet, 6 inches from the western side property line; and more than 100 feet from the northern rear property line. Various site improvements would also be entailed in the proposed development, including a new car deck and associated stairway, a new side patio, a rear yard patio, and an attached deck also located in the rear yard.
Design Review approval is required pursuant to Section 22.42.020.B of the Marin County Development Code because the property is located in a conventional zoning district and the project proposes floor area in excess of 3,500 square feet, a primary residence that appears to exceed a height of 30 feet, and a detached accessory building (garage) that appears to exceed a height of 16 feet above the surrounding grade.
The applicant also requests Tree Removal Permit approval to remove what appears to be two trees that are of a heritage size as determined by the measurement of the tree’s Diameter at Breast Height (DBH). The trees proposed for removal that are subject to a Tree Removal Permit are listed in the table below.
| Common Name |
Scientific Name |
Observed DBH (in.) |
Protected (P) Size DBH (in.)
|
Heritage (H) Size DBH (in.) |
| California black oak |
Q. kelloggii |
30 in. (H) |
6 in. |
18 in. |
| Coast redwood |
Sequoia sempervirens |
32 in. (H) |
10 in. |
30 in. |
Tree Removal Permit approval is required pursuant to Chapter 22.62 of the Marin County Code because the project entails the removal of trees that are of a heritage size.
Zoning: R1-B2 (Residential Single Family)
Countywide Plan Designation: SF5 (Low Density Residential)
Community Plan (if applicable): Kentfield/Greenbrae