Sonoma County property record for 3620 Williams Rd, Santa Rosa, CA 95404
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 2,012 sqft · built 1967 |
| Lot Size | 0.737 acres (32,100 sqft) |
| Owner | Trust Name on File |
| Last Sale | $275,000 (Apr 1992) |
| Tax Bill | $6,278 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 029-152-028-000 |
| Primary APN | 029-152-028-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 3 Rooms |
| Stories | 1 Story |
| Building Area | 2,012 sqft Living Area |
| Gross Area | 2,474 sqft |
| 1st Floor Area | 2,012 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1967 |
|---|---|
| Effective Year Built | Effective 2000 |
| Construction Type | Wood |
| Lot Area | 32,100 sqft (0.737 acres) |
| Garage Type | Attached |
| Garage Area | 462 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | HVAC |
|---|
| Old Parcel Number | 029-152-028 |
|---|---|
| Street Address | 3620 WILLIAMS RD |
| City | SANTA ROSA |
| State | CA |
| Zip | 95404-1616 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RR5 |
| Legal Description | 74 FORM 29-150-60 AP # CHG PER MAP DEPT |
| Legal Subdivision | END-O-VALLEY |
| Legal Block | 3 |
| Legal Lot Number | 10 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | SANTA ROSA |
| Census Block Group | 3 |
| Census Block | 3005 |
| Census Tract | 152401 |
3620 Williams Rd is owner-occupied and held in a trust since July 2016.
Source: Sonoma County records, as of September 1, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 3620 WILLIAMS RD, SANTA ROSA, CA 95404-1616 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Apr 9, 1992 · Amount on File |
| Deed Sale | Apr 9, 1992 · Amount on File |
| Deed Document Number | 199240397 |
| Last Transfer Date | Jul 18, 2016 |
| Transfer Doc | 0000062189 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 3620 Williams Rd was $6,278 with a homeowner's exemption.
Source: Sonoma County assessment roll, as of September 1, 2026
| Type | Name |
|---|---|
| State | California |
| County | Sonoma County |
| Elementary School District | Rincon Valley Union Elementary School District (KG - 06) |
| Secondary School District | Santa Rosa High School District (07 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $526,506 (+2%) Land $212,512 Building $313,994 | |
| 2025 | $6,278.00 Homeowner's exemption | $516,184 Land $208,346 Building $307,838 |
| 2023 | $5,946.00 (+4.3%) Homeowner's exemption | $496,141 Land $200,256 Building $295,885 |
| 2022 | $5,701.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 3620 Williams Rd in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective February 15, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 10 (0% premium discount) |
| Nearby Flood Policies | 2 in force |
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 3620 Williams Rd is low, with a 0.05% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 63% of the US · lower than 78% of California |
|---|---|
| Wildfire Likelihood | 0.05% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | END-O-VALLEY MUTUAL WATER COMPANY private · serves 129 people · EPA ID CA4900547 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Sep 2021 |
| Also Mapped Here | CITY OF SANTA ROSA |
| 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 | 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 72 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 1,200 / 35 |
| Verizon Fixed Wireless | 300 / 20 |
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