Monterey County planning panel approves Carmel Valley house with ADU conversion and tree-replacement condition

The Monterey County Planning Commission on Aug. 13 approved a combined development permit for a single-family residence at 62 Marguerite in Carmel Valley, with conditions requiring the replacement of removed oak trees and a requirement that an accessory dwelling unit have no internal circulation with other structures.

Staff planner Haya Honoredo recommended the commission find the project qualifies for a Class 3 categorical exemption under the California Environmental Quality Act and approve construction of the new main residence, associated site improvements, and the removal of 13 coast live oak trees. Honoredo said the project sits inside a designated 2.6-acre building envelope created by the Tehama Phase 1 subdivision and that proposed exterior materials and colors are consistent with the Carmel Valley master plan.

The commission’s action followed additional discussion and a revised condition of approval that county staff read into the record. County staff proposed language requiring the property owner to obtain construction permits for the new single-family dwelling, demonstrate the ADU complies with county and state regulations, demonstrate the ADU does not have internal circulation with other habitable or nonhabitable structures, and obtain inspections by the project planner prior to final occupancy.

Why it matters: The commission’s condition aims to ensure the accessory dwelling unit remains below state/local ADU size limits and cannot be combined with adjacent studio or garage spaces to create a larger, effectively separate dwelling. The project also affects protected coast live oak trees and obligates the owner to replace removed trees at the ratio specified in the arborist report.

Key details: The parcel contains an existing 1,092-square-foot dwelling referred to as the carriage house, with an attached 594-square-foot studio and a three-car garage. Staff reported the project proposes to remove 13 coast live oaks; an arborist recommended a 1:1 replacement for removed trees and a 2:1 ratio for landmark trees. Staff noted the resolution and condition language needed updating to require 14 replacement trees. The Carmel Valley Land Use Advisory Committee voted unanimously to recommend approval as proposed.

The applicant’s architect, Craig Holdren of Holdren Litsky Architecture, told commissioners the carriage house has two separate exterior entrances and a lockable internal door and stair that connect the upper ADU to the lower studio; county staff said that internal connection would need to be removed or secured as part of the building permit review so the ADU cannot exceed statutory size limits.

Action: Commissioner Hartsell moved to support staff’s recommendation as amended; Commissioner Gomez seconded. The commission voted unanimously to approve the permit with the amended condition addressing the ADU and the updated tree replacement count.

Background and next steps: Staff said the ADU conversion itself is a ministerial action under county and state law and that building-permit review and inspections will confirm the internal circulation issue is resolved before final occupancy is granted. The condition also requires the applicant to demonstrate compliance with county and state ADU regulations at permitting.

The commission’s approval completes local land-use review for the combined development permit; building permits and any required inspection sign-offs remain to be completed before occupancy.