401 W Sierra Ave, Cotati, CA 94931 Property Records

Sonoma County property record for 401 W Sierra Ave, Cotati, CA 94931

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 814 sqft · built 1948
Lot Size	0.315 acres (13,709 sqft)
Owner	2 Individual Names on File
Last Sale	$560,000 (Jul 2020)
Tax Bill	$7,377 (2025)
Deeds & Mortgages	Jul 2020 Sale
Flood Zone	Zone X (minimal risk)
APN	`144-340-026-000`

Property Details

APN / Parcel Number

Primary APN	`144-340-026-000`
Alternative APN	`144-340-026`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	3 Rooms
Stories	1 Story
Building Area	814 sqft Living Area
Gross Area	1,254 sqft
1st Floor Area	814 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1948
Effective Year Built	Effective 1964
Architectural Style	Custom Design
Construction Type	Wood
Lot Area	13,709 sqft (0.315 acres)
Garage Type	Attached
Garage Area	440 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	HVAC

Location & Zoning

Old Parcel Number	144-340-026
Street Address	401 W SIERRA AVE
City	COTATI
State	CA
Zip	94931-4287
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	CITYCO
Legal Description	74 FORM PT OF 144-340-24 PER M/D
Legal Subdivision	PARCEL MAP NO 22
Legal Block	3
Jurisdiction	SONOMA CA
Township / Civil Division	PETALUMA
Census Block Group	3
Census Block	3000
Census Tract	151204

Owner

401 W Sierra Ave is owned and occupied by two individuals who bought it in July 2020.

Source: Sonoma County records, as of September 1, 2026

Owner of Record	2 Individual Names on File
Mailing Address	401 W SIERRA AVE, COTATI, CA 94931-4287
Occupancy	Owner Occupied
Owner Type	Individual

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jul 16, 2020 · Amount on File
Deed Sale	Jul 16, 2020 · Amount on File
Deed Document Number	202058287
Record Updated	Oct 29, 2026

July 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SONOMA CA
Recording Date	Jul 16, 2020
Property Address	401 W SIERRA AVE, COTATI, CA 94931-4287
Document Number	0000058287
Instrument Date	Jul 10, 2020
Instrument	58287
Transaction Type	Transfer
Record Updated	Aug 10, 2020
Title Company	CORNERSTONE TITLE COMPANY, CORNERSTONE TITLE CO

Transaction

Amount	Amount on Record
Tax	$616.00
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	401 W SIERRA AVE COTATI CA 949314287, COTATI, CA 94931-4287

Tax Assessment & Valuation

The 2025 property tax bill for 401 W Sierra Ave was $7,377.

Source: Sonoma County assessment roll, as of September 1, 2026

Property Jurisdictions

Type	Name
State	California
County	Sonoma County
Municipality	Cotati City
Unified School District	Cotati-Rohnert Park Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$618,282 (+2%) Land $248,416 Building $369,866
2025	$7,377.00	$606,160 Land $243,546 Building $362,614
2023	$7,164.00 (+1.78%)	$582,624 Land $234,090 Building $348,534
2022	$7,039.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

FEMA maps place 401 W Sierra Ave in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.

Source: FEMA National Flood Hazard Layer, effective February 15, 2026

FEMA Flood Zone	Zone X minimal risk
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

Wildfire risk around 401 W Sierra Ave is low, with less than 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 99.1% of the US · lower than 99.2% of California
Wildfire Likelihood	Under 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.

Drinking Water

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

Violations Reported to EPA

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.

Internet Providers

Source: FCC Broadband Data Collection, based on 321 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
T-Mobile Fixed Wireless	100 / 20
AT&T DSL	100 / 20