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New construction · Mill Valley

Can I tear down and rebuild my house in Mill Valley?

Tear-down and rebuild is allowed in Mill Valley on most legally conforming parcels, but the path depends on the parcel's zoning, lot conformance, and any historic / hillside / coastal overlays. Slope and tree cover constrain virtually every Mill Valley lot — buildable envelope is decided by ridgeline rules, slope-band density, and Heritage Tree ordinance long before zoning setbacks.

What changes the answer in Mill Valley.

Mill Valley uses R-1, RSP (Single Family-Planned), and Hillside (R-2H, etc.) districts; nearly all parcels carry slope, tree, and grading considerations. Most new SFRs in hillside zones require Design Review with the Planning Commission, plus story-pole noticing and arborist review.

  • Slope and tree cover constrain virtually every Mill Valley lot — buildable envelope is decided by ridgeline rules, slope-band density, and Heritage Tree ordinance long before zoning setbacks.
  • Most new SFRs in hillside zones require Design Review with the Planning Commission, plus story-pole noticing and arborist review.
  • Hillside design review applies across most parcels; ridgeline protection and silhouette rules dictate roofline and massing.
  • Most Mill Valley parcels are in CAL FIRE Very-High Fire Hazard Severity Zone — Chapter 7A and Marin-specific defensible-space rules apply.

Source-backed note

Demolition + new construction are reviewed by City of Mill Valley Planning & Building Department alongside any required planning / coastal / hillside review.

Local authority: City of Mill Valley Planning & Building Department

Get a Mill Valley-specific answer for your parcel.

Send us the address and we'll respond with a feasibility note that cites City of Mill Valley Planning & Building Department and the parcel's actual constraints — not a generic checklist.

Start a Mill Valley consultationCall (818) 650-3197

Alpha Dream Construction — licensed California general contractor.

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