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Planning Commission sends 155 Elm design review back for study session over massing, privacy and driveway concerns
Summary
The Mill Valley Planning Commission unanimously continued a design‑review application for a new single‑family home and ministerial ADU at 155 Elm after commissioners and neighbors raised concerns about building massing, second‑floor windows and the width of the proposed driveway.
The Mill Valley Planning Commission on March 11 continued a design‑review application for 155 Elm Avenue to a future study session so the applicant can revise the home’s massing, privacy treatments and driveway design.
Senior planner Steve Ross told commissioners the proposal is for a roughly 3,000‑square‑foot two‑story home on a 9,900‑square‑foot lot with a detached 800‑square‑foot accessory dwelling unit and a two‑car tandem garage. Ross said the existing house on the property is about 1,483 square feet, two mature trees on the lot would be preserved, and the ADU is processed ministerially under municipal code chapter 2,090 and must include a deed restriction.
Michael Heacock, the project architect, described design responses to the site’s roughly 7–11‑foot grade change, noted the new…
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