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General ConstructionMill ValleyPermit issued

ADU Addition at 409 Montford Ave, Mill Valley

409 MONTFORD AVE (ADU 409A), Mill Valley, 94941

Winston

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Reported project cost

$75,000

As declared on the permit filing. Single Family Dwellings.

Issued
September 24, 2026
Expires
—
License
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What was permitted

Homeowners in Mill Valley can review a significant construction project involving the conversion of existing space into a Junior Accessory Dwelling Unit (JADU) and the addition of an Accessory Dwelling Unit (ADU).

This permit, issued on September 24, 2026, has an estimated project cost of $75,000. BIC CONSTRUCTION INC. is listed as the contractor for this extensive ADU project.

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View the official permit record

Tracking number, work description, cost and dates

Tracking number94345
Work permit #—
Job filing number—
Work typeSingle Family Dwellings
StatusIssued
Job descriptionConversion Of (E) Space Into J A D U, Along With An A D U Addition Within The (E) Crawl Space Area.
Floor / unit—
Estimated cost$75,000
ApprovedJuly 2, 2026
IssuedSeptember 24, 2026
Expires—
BBL—
BIN—

Related searches

ADUJADUaccessory dwelling unitMill ValleyMarin Countyaddition$50,000-$100,000