403 W Sierra Ave, Cotati, CA 94931 Property Records

Sonoma County property record for 403 W Sierra Ave, Cotati, CA 94931

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,944 sqft · built 1977
Lot Size	0.273 acres (11,900 sqft)
Owner	2 Company Names on Record
Last Sale	$182,500 (Dec 1992)
Tax Bill	$3,997 (2025)
Deeds & Mortgages	Mar 2026 Transfer
Flood Zone	Zone X (minimal risk)
APN	`144-340-025-000`

Property Details

APN / Parcel Number

Primary APN	`144-340-025-000`
Alternative APN	`144-340-025`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,944 sqft Living Area
Gross Area	2,424 sqft
1st Floor Area	1,944 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1977
Effective Year Built	Effective 1979
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	11,900 sqft (0.273 acres)
Garage Type	Attached
Garage Area	480 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	HVAC

Location & Zoning

Old Parcel Number	144-340-025
Street Address	403 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 144-340-24 & PT TO 25 M/D
Legal Subdivision	PARCEL MAP, 197-4
Legal Block	3
Jurisdiction	SONOMA CA
Township / Civil Division	PETALUMA
Census Block Group	3
Census Block	3000
Census Tract	151204

Owner

Source: Sonoma County records, as of September 14, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Company Names on Record
Mailing Address	403 W SIERRA AVE, COTATI, CA 94931-4287
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Dec 23, 1992 · Amount on Record
Deed Sale	Dec 23, 1992 · Amount on Record
Deed Document Number	1992160762
Last Transfer Date	Mar 18, 2026
Transfer Doc	0000013070
Record Updated	Oct 29, 2026

March 2026: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SONOMA CA
Recording Date	Mar 20, 2026
Property Address	403 W SIERRA AVE, COTATI, CA 94931-4287
Document Number	0000013070
Map Reference	MB 197 PG 4
Instrument Date	Mar 18, 2026
Instrument	2026013070
Transaction Type	Transfer
Record Updated	Apr 2, 2026

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	403 W SIERRA AVE, COTATI, CA 94931-4287

Tax Assessment & Valuation

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		$323,186 (+2%) Land $159,379 Building $163,807
2025	$3,997.00 (+3.12%) Homeowner's exemption	$316,850 (+4.04%) Land $156,254 Building $160,596
2023	$3,876.00 (+1.84%) Homeowner's exemption	$304,549 Land $150,188 Building $154,361
2022	$3,806.00

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

Flood

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

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