277 Mountaire Cir, Clayton, CA 94517 Property Records

Contra Costa County property record for 277 Mountaire Cir, Clayton, CA 94517

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 2,057 sqft · built 1973
Lot Size	0.246 acres (10,700 sqft)
Owner	Company Name on File
Tax Bill	$3,033 (2025)
Flood Zone	Zone X (minimal risk)
APN	`119-171-013-4`

Property Details

APN / Parcel Number

Primary APN	`119-171-013-4`
Alternative APN	`119-171-013`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	2,057 sqft Living Area
1st Floor Area	2,057 sqft

Exterior

Year Built	Built 1973
Effective Year Built	Effective 1978
Architectural Style	Cluster
Lot Area	10,700 sqft (0.246 acres)
Garage Type	Attached
Garage Area	445 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	277 MOUNTAIRE CIR
City	CLAYTON
State	CA
Zip	94517-1552
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T04012 L0002 B EX MR
Legal Subdivision	DANA HILLS SUBDIVISION 4012
Legal Tract	04012
Legal Lot Number	2
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	4
Census Block	4004
Census Tract	355306

Owner

Source: Contra Costa County records · APN 119-171-013-4

Assessment roll updated July 14, 2026 · Last verified July 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	PO BOX 4012, WALNUT CREEK, CA 94596-0012
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Transfer Date	Dec 20, 1995
Transfer Doc	0000225168
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Municipality	Clayton City
Unified School District	Mount Diablo Unified School District (KG - 12)

Tax Bill & Assessment History

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

Year	Tax Bill	Assessed Value
2026		$162,405 (+2%) Land $50,004 Building $112,401
2025	$3,033.00 (+6.01%) Homeowner's exemption	$159,222 (+4.04%) Land $49,024 Building $110,198
2023	$2,861.00 (+2.43%) Homeowner's exemption	$153,041 Land $47,121 Building $105,920
2022	$2,793.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of October 12, 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Wildfire

Wildfire Risk	High above 76% of the US · above 53% of California
Wildfire Likelihood	0.4% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
T-Mobile USA Fixed Wireless	100 / 20

Based on FCC filings for 420 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	CONTRA COSTA WATER DISTRICT serves 210,500 people
Water Source	Surface water
Last State Inspection	Jan 2022
Lead	Under 1 ppb (2026–2028) 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 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.