Sonoma County property record for 645 William Cunningham Ave, Sonoma, CA 95476
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 4 ba · 4,058 sqft · built 1998 |
| Lot Size | 0.459 acres (20,007 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $1,000,000 (Nov 1998) |
| Tax Bill | $22,709 (2025) |
| Deeds & Mortgages | Jan 2022 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 127-700-026-000 |
| Primary APN | 127-700-026-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 4 Rooms |
| Stories | 2 Stories |
| Building Area | 4,058 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1998 |
|---|---|
| Effective Year Built | Effective 1998 |
| Construction Type | Wood |
| Lot Area | 20,007 sqft (0.459 acres) |
| Garage Type | Attached |
| Garage Area | 864 sqft |
| Parking Spaces | 3 Parking Spaces |
| Cooling System | HVAC |
|---|---|
| Heating System | Central |
| Old Parcel Number | 127-700-026 |
|---|---|
| Street Address | 645 WILLIAM CUNNINGHAM AVE |
| City | SONOMA |
| State | CA |
| Zip | 95476-7270 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | 94 FM PT 127-291-010 & 11 ARMSTRONG ESTS LOT 26 |
| Legal Subdivision | ARMSTRONG EST |
| Legal Block | 3 |
| Legal Lot Number | 26 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | SONOMA |
| Census Block Group | 3 |
| Census Block | 3008 |
| Census Tract | 150204 |
Source: Sonoma County records, as of October 1, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Mailing Address | 645 WILLIAM CUNNINGHAM AVE, SONOMA, CA 95476-7270 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Nov 3, 1998 · Amount on Record |
| Deed Sale | Nov 3, 1998 · Amount on Record |
| Deed Document Number | 1998130538 |
| Last Transfer Date | Dec 29, 2021 |
| Transfer Doc | 0000000702 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Jan 4, 2022 |
| Property Address | 645 WILLIAM CUNNINGHAM AVE, SONOMA, CA 95476-7270 |
| Document Number | 0000000702 |
| Map Reference | MB 511 PG 7-13 |
| Instrument Date | Dec 29, 2021 |
| Instrument | 2022000702 |
| Transaction Type | Transfer |
| Record Updated | Aug 17, 2023 |
| Title Company | ATLANTIS TITLE COMPANY, ATLAS TITLE COMPANY |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 645 WILLIAM CUNNINGHAM AVE, SONOMA, CA 95476-7270 |
| Document Number | 0000000703 |
|---|---|
| Date | Jan 4, 2022 |
| Instrument | 2022000703 |
| Name | CMG MORTGAGE INC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Jan 1, 2052 |
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 | $1,845,647 (+2%) Land $479,726 Building $1,365,921 | |
| 2025 | $22,709.00 (+4.9%) Homeowner's exemption | $1,809,459 (+4.04%) Land $470,320 Building $1,339,139 |
| 2023 | $21,649.00 (+1.14%) Homeowner's exemption | $1,739,198 Land $452,058 Building $1,287,140 |
| 2022 | $21,405.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 | 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.
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 | 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 | 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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