San Luis Obispo County property record for 16850 Walnut Ave, Atascadero, CA 93422
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 2,160 sqft · built 1919 |
| Lot Size | 0.37 acres (16,100 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $1,050,000 (Mar 2023) |
| Tax Bill | $13,411 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 059-474-024 |
| Primary APN | 059-474-024 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 12 Rooms |
| Stories | 2 Stories |
| Building Area | 2,939 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1919 |
|---|---|
| Effective Year Built | Effective 1919 |
| Construction Type | Wood |
| Lot Area | 16,100 sqft (0.37 acres) |
| Parking Spaces | 3 Parking Spaces |
| Total Buildings | 2 Buildings |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Sewer | Septic |
| Street Address | 16850 WALNUT AVE |
|---|---|
| City | ATASCADERO |
| State | CA |
| Zip | 93422-6622 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RS |
| Legal Description | ATAS STA MARG EXTENSION LT 18A |
| Legal Block | 3 |
| Legal Lot Number | 18A |
| Jurisdiction | SAN LUIS OBISPO CA |
| Township / Civil Division | ATASCADERO |
| Census Block Group | 3 |
| Census Block | 3004 |
| Census Tract | 12705 |
Source: San Luis Obispo County records, as of August 6, 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 | 16850 WALNUT AVE, ATASCADERO, CA 93422-6622 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Mar 31, 2023 · Amount on Record |
| Deed Sale | Mar 31, 2023 · Amount on Record |
| Deed Document Number | 20238842 |
| Prior Transfer Date | Jun 20, 2008 |
| Prior Transfer Doc | 0000036102 |
| Record Updated | Oct 29, 2026 |
Source: San Luis Obispo County assessment roll, as of August 6, 2026
| Type | Name |
|---|---|
| State | California |
| County | San Luis Obispo County |
| Unified School District | Atascadero Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,257,068 (+6.43%) Land $424,483 Building $832,585 | |
| 2025 | $13,411.00 (+178.01%) Homeowner's exemption | $1,181,120 (+172.85%) Land $416,160 Building $764,960 |
| 2023 | $4,824.00 (+1.28%) Homeowner's exemption | $432,886 Land $179,686 Building $253,200 |
| 2022 | $4,763.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective July 22, 2025 · 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 | Yes |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on Record median of 50 policies |
| Nearby Flood Policies | 50 in force |
| Nearby Flood Claims | 9 (2023) |
| Claims Outside the SFHA | 2 of 9 |
| Most Recent Claim | Jan 2023 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
| 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 | High above 82% of the US · above 61% of California |
|---|---|
| Wildfire Likelihood | 0.9% 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 | GARDEN FARMS C.W.D. private · serves 440 people · EPA ID CA4000507 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jun 2024 |
| Lead | Under 1 ppb (2026–2028) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 1 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 63 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Ranch Wifi, Surfnet Communications, Verizon.
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