Sonoma County property record for 663 Donner Ave, Sonoma, CA 95476
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,858 sqft · built 1940 |
| Lot Size | 0.172 acres (7,500 sqft) |
| Owner | Company Name on File |
| Tax Bill | $4,947 (2025) |
| Deeds & Mortgages | Aug 2021 Transfer Jul 2021 Transfer + 1 more |
| Flood Zone | Zone X (moderate risk) |
| APN | 018-313-014-000 |
| Primary APN | 018-313-014-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 3 Rooms |
| Stories | 1 Story |
| Building Area | 1,858 sqft Living Area |
| 1st Floor Area | 1,858 sqft |
| Year Built | Built 1940 |
|---|---|
| Effective Year Built | Effective 1987 |
| Exterior Material | Wood Siding |
| Construction Type | Wood |
| Roof Material | Asbestos |
| Lot Area | 7,500 sqft (0.172 acres) |
| Lot Dimensions | 150 ft deep x 50 ft wide |
| Garage Area | 280 sqft |
| Cooling System | HVAC |
|---|---|
| Heating System | Floor/Wall Furnace |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 663 DONNER AVE |
|---|---|
| City | SONOMA |
| State | CA |
| Zip | 95476-7131 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | PART OF LOT 78 |
| Legal Subdivision | CITY OF SONOMA |
| Legal Block | 1 |
| Legal Lot Number | 78 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | SONOMA |
| Census Block Group | 1 |
| Census Block | 1014 |
| Census Tract | 150204 |
Source: Sonoma County records · APN 018-313-014-000
Assessment roll updated April 13, 2026 · Last verified August 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 663 DONNER AVE, SONOMA, CA 95476-7131 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Date | Document |
|---|---|
| Aug 27, 2021 | Correction Deed |
| Jul 20, 2021 | Intrafamily Transfer, Transfer |
| Jul 26, 2021 | Intrafamily Transfer, Transfer |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Transfer Date | Aug 19, 2021 |
| Transfer Doc | 0000097416 |
| Record Updated | Sep 20, 2026 |
| Document Type | Correction Deed |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Aug 27, 2021 |
| Property Address | 663 DONNER AVE, SONOMA, CA 95476-7131 |
| Document Number | 0000097416 |
| Instrument Date | Aug 19, 2021 |
| Instrument | 2021097416 |
| Record Updated | Jun 07, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 663 DONNER AVE, SONOMA, CA 95476-7131 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Jul 20, 2021 |
| Property Address | 663 DONNER AVE, SONOMA, CA 95476-7131 |
| Document Number | 0000082932 |
| Instrument Date | Jul 13, 2021 |
| Instrument | 2021082932 |
| Transaction Type | Transfer |
| Record Updated | Jun 07, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 663 DONNER AVE, SONOMA, CA 95476-7131 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Jul 26, 2021 |
| Property Address | 663 DONNER AVE, SONOMA, CA 95476-7131 |
| Document Number | 0000085063 |
| Instrument Date | Jul 01, 2021 |
| Instrument | 2021085063 |
| Transaction Type | Transfer |
| Record Updated | Aug 12, 2021 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 663 DONNER AVE, SONOMA, CA 95476-7131 |
Source: Sonoma County records · Assessment roll updated April 13, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | California |
| County | Sonoma County |
| Municipality | Sonoma City |
| Unified School District | Sonoma Valley Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $4,947.00 (+5.32%) Homeowner's exemption | $325,803 (+4.04%) Land $103,585 Building $222,218 |
| 2023 | $4,697.00 (+2.06%) Homeowner's exemption | $313,153 Land $99,563 Building $213,590 |
| 2022 | $4,602.00 |
Source: FEMA National Flood Hazard Layer, Sonoma County (06097C), as of February 15, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060971502041, as of September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 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 |
| Flood Insurance Cost | Premium on Record median of 15 policies |
| Nearby Flood Policies | 15 in force |
| Nearby Flood Claims | 8 (1978–2025) |
| Claims Outside the SFHA | 6 of 8 |
| Most Recent Claim | Feb 2025 · rainfall accumulation |
| Claims by Event |
|
| 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 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: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
Based on FCC filings for 579 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System, water system CA4910012, as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | CITY OF SONOMA serves 10,619 people |
|---|---|
| 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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