Marin County property record for 857 Diablo Ave, Novato, CA 94947
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 756 sqft · built 1942 |
| Lot Size | 0.157 acres (6,850 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $62,000 (Jan 2013) |
| Tax Bill | $1,931 (2025) |
| Flood Zone | Zone AO (high risk) |
| APN | 140-053-16 |
| Primary APN | 140-053-16 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Building Area | 756 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1942 |
|---|---|
| Effective Year Built | Effective 1942 |
| Architectural Style | Contemporary |
| Lot Area | 6,850 sqft (0.157 acres) |
| Garage Area | 270 sqft |
| Parking Spaces | 1 Parking Space |
| Street Address | 857 DIABLO AVE |
|---|---|
| City | NOVATO |
| State | CA |
| Zip | 94947-4007 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Subdivision | NOVATO EXT #1 |
| Legal Lot Number | 18 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | NOVATO |
| Census Block Group | 4 |
| Census Block | 4000 |
| Census Tract | 103200 |
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 Individual Names on Record |
|---|---|
| Mailing Address | 857 DIABLO AVE, NOVATO, CA 94947-4007 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jan 30, 2013 · Amount on Record |
| Deed Sale | Jan 30, 2013 · Amount on Record |
| Deed Document Number | 20136644 |
| Prior Transfer Date | Jan 18, 2013 |
| Prior Transfer Doc | 0000006644 |
| Record Updated | Sep 20, 2026 |
Source: Marin County assessment roll, as of July 13, 2026
| Type | Name |
|---|---|
| State | California |
| County | Marin County |
| Municipality | Novato City |
| Unified School District | Novato Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $48,762 (+2%) Land $28,132 Building $20,630 | |
| 2025 | $1,931.00 (+6.57%) | $47,807 (+4.04%) Land $27,581 Building $20,226 |
| 2023 | $1,812.00 (+2.37%) | $45,950 Land $26,510 Building $19,440 |
| 2022 | $1,770.00 |
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 AO high risk · sheet flow 1–3 ft |
|---|---|
| 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 Record median of 101 individual policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 129 units insured incl. 28 condo units |
| Nearby Flood Claims | 1 (2023) |
| Most Recent Claim | Jan 2023 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
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 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 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 | NORTH MARIN WATER DISTRICT serves 61,691 people · EPA ID CA2110003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Feb 2024 |
| Lead | Under 1 ppb (2024–2026) 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.
Source: FCC Broadband Data Collection, based on 633 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Frontier Fiber | 2,000 / 2,000 |
| Xfinity Cable | 2,000 / 250 |
May also be available: Unwired, Verizon.
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