Sonoma County property record for 8173 Arthur St, Cotati, CA 94931
| Property Type | Quadplex |
|---|---|
| Details | 2 bd · 1 ba · 3,200 sqft · built 1972 |
| Lot Size | 0.172 acres (7,500 sqft) |
| Owner | Company Name on Record |
| Last Sale | $750,000 (Jun 2004) |
| Tax Bill | $12,646 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 144-273-014-000 |
| Primary APN | 144-273-014-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 8 Rooms |
| Units | 4 Units |
| Stories | 2 Stories |
| Building Area | 3,200 sqft Living Area |
| Year Built | Built 1972 |
|---|---|
| Effective Year Built | Effective 1972 |
| Architectural Style | Custom Design |
| Construction Type | Wood |
| Lot Area | 7,500 sqft (0.172 acres) |
| Garage Type | Carport |
| Garage Area | 714 sqft |
| Carport | Carport |
| Carport Area | 714 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | None |
|---|
| Old Parcel Number | 144-273-014 |
|---|---|
| Street Address | 8173 ARTHUR ST |
| City | COTATI |
| State | CA |
| Zip | 94931-4237 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Quadplex |
| Local Zoning Code | CITYCO |
| Legal Description | 1972 FORM PT OF 144-273-05 LT3 RANCHO COTATI #6 |
| Legal Subdivision | SUBDIVISION #6 OF RANCHO COTATI |
| Legal Block | 2 |
| Legal Lot Number | 3 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | PETALUMA |
| Census Block Group | 2 |
| Census Block | 2004 |
| Census Tract | 151204 |
Source: Sonoma County records, as of September 1, 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 Record |
|---|---|
| Mailing Address | 319 ORCHID DR, SAN RAFAEL, CA 94903-2527 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jun 1, 2004 · Amount on Record |
| Deed Sale | Jun 1, 2004 · Amount on Record |
| Deed Document Number | 200483401 |
| Last Transfer Date | Oct 19, 2007 |
| Transfer Doc | 0000119028 |
| Record Updated | Oct 29, 2026 |
Source: Sonoma County assessment roll, as of September 1, 2026
| Type | Name |
|---|---|
| State | California |
| County | Sonoma County |
| Municipality | Cotati City |
| Unified School District | Cotati-Rohnert Park Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,085,850 (+1.95%) Land $362,548 Building $723,302 | |
| 2025 | $12,646.00 (+2.94%) | $1,065,039 (+4.06%) Land $355,440 Building $709,599 |
| 2023 | $12,285.00 (+1.74%) | $1,023,455 Land $341,639 Building $681,816 |
| 2022 | $12,075.00 |
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 AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on Record median of 26 policies |
| Nearby Flood Policies | 26 in force |
| Nearby Flood Claims | 1 (2012) |
| Most Recent Claim | Dec 2012 · tidal / storm surge |
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 | Not rated no burnable land within 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 COTATI serves 7,290 people · EPA ID CA4910016 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Aug 2024 |
| 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 | None 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 679 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 |
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