Green Valley Road Rezone and Two-Lot Minor Subdivision, County Files CDRZ23-03271 and CDMS23-00005

Green Valley Road Rezone and Two-Lot Minor Subdivision, County Files CDRZ23-03271 and CDMS23-00005

Approval of a Rezone of the property from A-2, General Agricultural District to R-40, Single-Family Residential district and approval of a vesting tentative map to subdivide the subject 2-acre property into two parcels, resulting in a 0.95-acre (gross) Parcel A and a 1.05-acre (gross) Parcel B, with an approximately 4,339 square-foot private access and utility easement (PAUE) approximately 25 feet in width on proposed Parcel B. Proposed site improvements include widening the existing driveway within the new PAUE at the connection to Green Valley Road to approximately 20 feet and repaving portions of the driveway. An improved and widened driveway to a new residence on proposed Parcel B would split from the PAUE. New development proposed for Parcel A consists of the installation of two bioretention filters for stormwater control. An existing residence would remain on Parcel A. Proposed site improvements also include three bioretention filters, a concrete ditch, trench inlets/drains for stormwater control and drainage, and six retaining walls ranging between zero and nine feet in height. The applicant has requested variances for a 0-foot front setback (where 25 feet is required) and 8-foot side yard (where 20 feet is required) for construction of “Wall No. 1” and a 5-foot front setback (where 25 feet is required) for construction of “Wall No. 3”. The applicant requests approval of an exception from the requirements of Title 9, Chapter 96-10, of the County Ordinance Code related to the undergrounding of existing overhead utility services along the subject property’s Green Valley Road frontage. Water, sewer, electrical, and other utilities extending to the proposed residence on Parcel B would be installed underground. Trenching for utilities and drainage improvements would be performed as part of grading which is anticipated to entail ±330 cubic yards (CYS) of cut and ±540 CYS of fill for a net 210 CYS. The applicant also requests approval of a tree permit for the removal of code-protected trees including three valley oaks, one coast live oak, three coast redwoods, and one ash (trees #106 through #113) with a combined diameter of 149 inches, and to allow work within the driplines of code-protected trees including one valley oak (tree #120) and three coast live oaks (trees #103 through #105) with a combined diameter of 79 inches for the demolition of an existing barn, construction of retaining walls, grading, site/drainage improvements, and construction of a new residence on proposed Parcel B that would be a 3,496-square-foot, two-story home with a 553-square-foot garage, 315-square-foot main floor deck, and 383-square-foot lower floor concrete patio.

Alamo

Contra Costa

Countywide, San Francisco Bay Area

Contra Costa