Marin County property record for 509 Miller Ave, Mill Valley, CA 94941
| Property Type | Commercial |
|---|---|
| Details | 822 sqft |
| Lot Size | 0.013 acres (584 sqft) |
| Owner | Company Name on File |
| Tax Bill | $5,770 (2025) |
| Deeds & Mortgages | Apr 2020 Mortgage Apr 2020 Mortgage |
| Flood Zone | Zone AE (high risk) |
| APN | 030-481-04 |
| Primary APN | 030-481-04 |
|---|
| Building Area | 822 sqft Gross Area |
|---|
| Lot Area | 584 sqft (0.013 acres) |
|---|
| Street Address | 509 MILLER AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-2905 |
| Property Category | Commercial |
| Property Type | Commercial > Retail |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 2 |
| Census Block | 2021 |
| Census Tract | 126100 |
509 Miller Ave, a commercial property, is owned by a company.
Source: Marin County records, as of July 13, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 35 CORTE MADERA AVE, 7, MILL VALLEY, CA 94941-1895 |
| Owner Type | Company |
| Vesting | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Apr 30, 2020 | Deed of Trust, Mortgage · Commercial Mortgage FIRST REPUBLIC BANK |
| Apr 30, 2020 | Deed of Trust, Mortgage · Commercial Mortgage FIRST REPUBLIC BANK |
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | MARIN CA |
| Property Address | 509 MILLER AVE, MILL VALLEY, CA 94941-2905 |
| Transaction Type | Mortgage |
| Record Updated | Feb 7, 2021 |
| Title Company | OLD REPUBLIC TITLE COMPANY |
| Name | Verified Name |
|---|
| Document Number | 0000017091 |
|---|---|
| Date | Apr 30, 2020 |
| Instrument | 2020-0017091 |
| Name | FIRST REPUBLIC BANK |
|---|---|
| Type | Bank |
| Address | SAN FRANCISCO, CA 94111 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | MARIN CA |
| Property Address | 509 MILLER AVE, MILL VALLEY, CA 94941-2905 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | OLD REPUBLIC TITLE CO |
| Name | Verified Name |
|---|
| Document Number | 0000017090 |
|---|---|
| Date | Apr 30, 2020 |
| Instrument | 2020-0017090 |
| Name | FIRST REPUBLIC BANK |
|---|---|
| Type | Bank |
| Address | SAN FRANCISCO, CA 94111 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
The 2025 property tax bill for 509 Miller Ave was $5,770.
Source: Marin County assessment roll, as of July 13, 2026
| Type | Name |
|---|---|
| State | California |
| County | Marin County |
| Municipality | Mill Valley City |
| Elementary School District | Mill Valley Elementary School District (KG - 08) |
| Secondary School District | Tamalpais Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $244,795 (+2%) Land $125,886 Building $118,909 | |
| 2025 | $5,770.00 | $239,996 Land $123,418 Building $116,578 |
| 2023 | $5,493.00 (+3.92%) | $230,679 Land $118,627 Building $112,052 |
| 2022 | $5,286.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 509 Miller Ave in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.
Source: FEMA National Flood Hazard Layer, effective October 18, 2023 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on File median of 123 individual policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 147 units insured incl. 24 condo units |
| Nearby Flood Claims | 81 (1979–2026) |
| Claims Outside the SFHA | 8 of 81 |
| Most Recent Claim | Apr 2026 · rainfall accumulation |
| Claims by Event |
|
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 509 Miller Ave is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | Direct burnable vegetation |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | MARIN MUNICIPAL WATER DISTRICT serves 188,116 people · EPA ID CA2110002 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Aug 2023 |
| Lead | Under 1 ppb (2019–2021) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 825 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: Etheric Networks, T-Mobile.
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