233 Mountaire Cir, Clayton, CA 94517 Property Records

Contra Costa County property record for 233 Mountaire Cir, Clayton, CA 94517

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 2,242 sqft · built 1974
Lot Size	0.218 acres (9,500 sqft)
Owner	Trust Name on File
Last Sale	$770,000 (May 2016)
Tax Bill	$11,334 (2025)
Deeds & Mortgages	Jun 2021 Transfer Jun 2021 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`119-212-004-4`

Property Details

APN / Parcel Number

Primary APN	`119-212-004-4`
Alternative APN	`119-212-004`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	11 Rooms
Stories	1 Story
Building Area	2,242 sqft Living Area
Gross Area	2,765 sqft
1st Floor Area	2,242 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1974
Effective Year Built	Effective 1985
Architectural Style	Ranch
Exterior Material	Stucco
Construction Type	Frame
Roof Material	Wood Shingle
Lot Area	9,500 sqft (0.218 acres)
Garage Type	Attached
Garage Area	523 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	233 MOUNTAIRE CIR
City	CLAYTON
State	CA
Zip	94517-1549
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T04013 L0027 B EX MR
Legal Subdivision	SUBDIVISION 4013
Legal Tract	04013
Legal Lot Number	27
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	4
Census Block	4005
Census Tract	355306

Owner

233 Mountaire Cir is owner-occupied and held in a trust since June 2021.

Source: Contra Costa County records, as of July 14, 2026

Owner of Record	Trust Name on File
Mailing Address	233 MOUNTAIRE CIR, CLAYTON, CA 94517-1549
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

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

Date	Document
Jun 21, 2021	Intrafamily Transfer, Transfer NORTH AMERICAN TITLE CO INC
Jun 21, 2021	Intrafamily Transfer, Transfer · Conventional Mortgage QUICKEN LOANS LLC

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	May 10, 2016 · Amount on File
Deed Sale	May 10, 2016 · Amount on File
Prior Sale	Jun 1, 1999 · Amount on File
Deed Document Number	201687975
Last Transfer Date	Jun 8, 2021
Transfer Doc	0000178081
Record Updated	Oct 29, 2026

June 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Jun 21, 2021
Property Address	233 MOUNTAIRE CIR, CLAYTON, CA 94517-1549
Document Number	0000178081
Map Reference	MB 144 PG 38
Instrument Date	Jun 8, 2021
Instrument	2021-178081
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	NORTH AMERICAN TITLE CO INC

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
Relationship	Family Trust
Address	233 MOUNTAIRE CIR, CLAYTON, CA 94517-1549

June 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Jun 21, 2021
Property Address	233 MOUNTAIRE CIR, CLAYTON, CA 94517-1549
Document Number	0000178079
Map Reference	MB 144 PG 38
Instrument Date	Jun 8, 2021
Instrument	2021-178079
Transaction Type	Transfer
Record Updated	Nov 3, 2022
Title Company	NORTH AMERICAN TITLE COMPANY, NORTH AMERICAN TITLE CO INC

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
Relationship	Community Property with Right of Survivorship
Address	233 MOUNTAIRE CIR, CLAYTON, CA 94517-1549
Investor	Possibly a Property Investor

Mortgage

Document Number	0000178080
Date	Jun 21, 2021
Instrument	2021-178080

Lender

Name	QUICKEN LOANS LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Jul 1, 2051

Tax Assessment & Valuation

The 2025 property tax bill for 233 Mountaire Cir was $11,334 with a homeowner's exemption.

Source: Contra Costa County assessment roll, as of July 14, 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

Year	Tax Bill	Assessed Value
2026		$929,745 (+2%) Land $507,134 Building $422,611
2025	$11,334.00 Homeowner's exemption	$911,516 Land $497,191 Building $414,325
2023	$10,857.00 (+1.27%) Homeowner's exemption	$876,123 Land $477,886 Building $398,237
2022	$10,721.00

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

Flood

FEMA maps place 233 Mountaire Cir in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective October 12, 2026

FEMA Flood Zone	Zone X minimal risk
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 233 Mountaire Cir is moderate, ranking above 67% of the US, with a 0.2% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Moderate above 67% of the US · above 42% of California
Wildfire Likelihood	0.2% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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	CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003
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, 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 351 locations within half a mile, as of December 31, 2025

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

May also be available: Astound Broadband, AT&T.

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