Sonoma County property record for 420 Patten St, Sonoma, CA 95476
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2.5 ba · 2,675 sqft · built 2023 |
| Lot Size | 0.23 acres (10,000 sqft) |
| Owner | Trust Name on File |
| Last Sale | $676,000 (Jun 2002) |
| Tax Bill | $38,199 (2025) |
| Deeds & Mortgages | Jun 2021 Construction Loan |
| Flood Zone | Zone X (moderate risk) |
| APN | 018-273-013-000 |
| Primary APN | 018-273-013-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 2,675 sqft Living Area |
| Gross Area | 3,080 sqft |
| 1st Floor Area | 2,675 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 2023 |
|---|---|
| Effective Year Built | Effective 2023 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 10,000 sqft (0.23 acres) |
| Garage Type | Attached |
| Garage Area | 405 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | HVAC |
|---|
| Old Parcel Number | 018-273-013 |
|---|---|
| Street Address | 420 PATTEN ST |
| City | SONOMA |
| State | CA |
| Zip | 95476-6734 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | MAP 32 PG 20 BLK 3 PART OF LOT 9 |
| Legal Subdivision | PICETTI TERRACE |
| Legal Block | 3 |
| Legal Lot Number | 9 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | SONOMA |
| Census Block Group | 3 |
| Census Block | 3006 |
| Census Tract | 150204 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the Sonoma Plaza listed 1975 · 31 contributing resources · National Historic Landmark (designated 1960) · NRIS 75000489 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
420 Patten St is held in a trust since May 2010.
Source: Sonoma County records, as of September 1, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 100 DRACENA AVE, PIEDMONT, CA 94611-3903 |
| Owner Type | Company |
| Vesting | Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jun 21, 2002 · Amount on File |
| Deed Sale | Jun 21, 2002 · Amount on File |
| Prior Sale | Apr 14, 2000 · Amount on File |
| Deed Document Number | 200295261 |
| Last Transfer Date | May 11, 2010 |
| Transfer Doc | 0000042735 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SONOMA CA |
| Property Address | 420 PATTEN ST, SONOMA, CA 95476-6734 |
| Transaction Type | Mortgage |
| Record Updated | Jul 19, 2021 |
| Title Company | FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE CO |
| Name | Verified Name |
|---|---|
| Address | 420 PATTEN ST, SONOMA, CA 95476-6734 |
| Document Number | 0000075220 |
|---|---|
| Date | Jun 29, 2021 |
| Instrument | 2021075220 |
| Name | FIRST REPUBLIC BANK |
|---|---|
| Type | Bank |
| Address | SAN FRANCISCO, CA 94111 |
| Type | Construction Mortgage |
|---|---|
| Amount | Amount on Record |
The 2025 property tax bill for 420 Patten St was $38,199.
Source: Sonoma County assessment roll, as of September 1, 2026
| Type | Name |
|---|---|
| State | California |
| County | Sonoma County |
| Municipality | Sonoma City |
| Unified School District | Sonoma Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $3,345,333 (+2%) Land $655,805 Building $2,689,528 | |
| 2025 | $38,199.00 | $3,279,740 Land $642,947 Building $2,636,793 |
| 2023 | $12,057.00 (+1.49%) | $959,886 Land $567,982 Building $391,904 |
| 2022 | $11,880.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 420 Patten St in Zone X, an area of moderate flood risk, though there have been 1 flood claim nearby since 1998.
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 moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 10 (0% premium discount) |
| Nearby Flood Policies | 3 in force |
| Nearby Flood Claims | 1 (1998) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Jan 1998 · rainfall accumulation |
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 420 Patten St 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 | 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 | CITY OF SONOMA serves 10,619 people · EPA ID CA4910012 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jul 2024 |
| Lead | Under 1 ppb (2021–2023) 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 540 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: T-Mobile.
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