Marin County property record for 66 Topside Way, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3.5 ba · 3,117 sqft · built 1980 |
| Lot Size | 0.322 acres (14,025 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $11,816 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 043-122-33 |
| Primary APN | 043-122-33 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 3,117 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1980 |
|---|---|
| Effective Year Built | Effective 1982 |
| Architectural Style | Contemporary |
| Exterior Material | Wood Siding |
| Roof Material | Composition Shingle |
| Lot Area | 14,025 sqft (0.322 acres) |
| Garage Area | 552 sqft |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | 395 sqft |
| Patio Area | 395 sqft |
| Heating System | Central |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 66 TOPSIDE WAY |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-3212 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Subdivision | HARBOR POINT 02B |
| Legal Lot Number | 83 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 1 |
| Census Block | 1003 |
| Census Tract | 125000 |
Source: Marin County records, as of July 13, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 66 TOPSIDE WAY, MILL VALLEY, CA 94941-3212 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Living Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Aug 17, 2023 |
| Transfer Doc | 0000021050 |
| Record Updated | Sep 20, 2026 |
Source: Marin County assessment roll, as of July 13, 2026
| Type | Name |
|---|---|
| State | California |
| County | Marin County |
| 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 | $923,666 (+2%) Land $319,313 Building $604,353 | |
| 2025 | $11,816.00 (+4.95%) Homeowner's exemption | $905,557 (+4.04%) Land $313,053 Building $592,504 |
| 2023 | $11,259.00 (+3.27%) Homeowner's exemption | $870,396 Land $300,897 Building $569,499 |
| 2022 | $10,902.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective October 18, 2023 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone VE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 29 individual policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 81 units insured incl. 52 condo units |
| Nearby Flood Claims | 24 (1978–2014) |
| Claims Outside the SFHA | 2 of 24 |
| Most Recent Claim | Dec 2014 · 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.1% of the US · lower than 99.2% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
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 185 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: T-Mobile.
5G (outdoors only) and 4G LTE
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