321 Semillon Cir, Clayton, CA 94517 Property Records

Contra Costa County property record for 321 Semillon Cir, Clayton, CA 94517

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,391 sqft · built 1978
Lot Size	0.297 acres (12,915 sqft)
Owner	Individual Name on File
Last Sale	$1,295,000 (Mar 2026)
Tax Bill	$2,094 (2025)
Deeds & Mortgages	Mar 2026 Sale & Mortgage Jan 2026 Sale & Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`119-554-002-4`

Property Details

APN / Parcel Number

Primary APN	`119-554-002-4`
Alternative APN	`119-554-002`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	11 Rooms
Stories	2 Stories
Building Area	2,391 sqft Living Area
1st Floor Area	1,423 sqft
2nd Floor Area	968 sqft

Exterior

Year Built	Built 1978
Effective Year Built	Effective 1979
Lot Area	12,915 sqft (0.297 acres)
Garage Type	Attached
Garage Area	721 sqft
Parking Spaces	3 Parking Spaces

Location & Zoning

Street Address	321 SEMILLON CIR
City	CLAYTON
State	CA
Zip	94517-1419
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R12
Legal Description	T04805 L0018 B
Legal Subdivision	SUBDIVISION 4805
Legal Tract	04805
Legal Lot Number	18
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	1
Census Block	1011
Census Tract	355308

Owner

321 Semillon Cir is owned and occupied by an individual who bought it in March 2026.

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

Owner of Record	Individual Name on File
Mailing Address	321 SEMILLON CIR, CLAYTON, CA 94517-1419
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Unmarried Man

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
Mar 31, 2026	Grant Deed, Transfer · Conventional Mortgage LOANDEPOT.COM LLC
Jan 6, 2026	Grant Deed, Transfer · Commercial Mortgage TIER ONE FUNDING CA INC
Dec 4, 2025	Intrafamily Transfer, Transfer

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Mar 31, 2026 · Amount on File
Deed Sale	Mar 31, 2026 · Amount on File
Prior Sale	Jan 6, 2026 · Amount on File
Deed Document Number	202631887
Prior Transfer Date	May 1, 2024
Prior Transfer Doc	0000042752
Record Updated	Sep 20, 2026

March 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Mar 31, 2026
Property Address	321 SEMILLON CIR, CLAYTON, CA 94517-1419
Document Number	0000031887
Map Reference	MB 206 PG 17
Instrument Date	Mar 28, 2026
Instrument	2026- 031887
Transaction Type	Transfer
Record Updated	Apr 14, 2026
Title Company	TWFG NATIONAL TITLE INSURANCE COMPANY, WFG NATIONAL TITLE INS CO

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	321 SEMILLON CIR, CLAYTON, CA 94517-1419

Mortgage

Document Number	0000031888
Date	Mar 31, 2026
Instrument	2026- 031888

Lender

Name	LOANDEPOT.COM LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Apr 1, 2056

January 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Jan 6, 2026
Property Address	321 SEMILLON CIR, CLAYTON, CA 94517-1419
Document Number	0000001365
Map Reference	MB 206 PG 17
Instrument Date	Jan 5, 2026
Instrument	2026- 001365
Transaction Type	Transfer
Record Updated	Jan 15, 2026
Title Company	TWFG NATIONAL TITLE INSURANCE COMPANY, WFG NATIONAL TITLE INS CO

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	621 CAMBRIAN DR, CAMPBELL, CA 95008-5532

Mortgage

Document Number	0000001366
Date	Jan 6, 2026
Instrument	2026- 001366

Lender

Name	TIER ONE FUNDING CA INC

Agreement

Type	Commercial Mortgage
Amount	Amount on Record
Term	13 Months
Due	Feb 1, 2027

December 2025: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Dec 4, 2025
Property Address	321 SEMILLON CIR, CLAYTON, CA 94517-1419
Document Number	0000136038
Map Reference	MB 206 PG 17
Instrument Date	Nov 21, 2025
Instrument	2025- 136038
Transaction Type	Transfer
Record Updated	Dec 18, 2025

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	2401 BIG RANCH RD, NAPA, CA 94558-1902

Tax Assessment & Valuation

The 2025 property tax bill for 321 Semillon Cir was $2,094.

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		$247,141 (+2%) Land $78,749 Building $168,392
2025	$2,094.00	$242,296 Land $77,205 Building $165,091
2023	$1,974.00 (-1.5%) Disabled Person's exemption Veteran's exemption	$232,889 Land $74,208 Building $158,681
2022	$2,004.00

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

FEMA maps place 321 Semillon Cir 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 October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 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
Nearby Flood Policies	4 in force

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.

Wildfire

Wildfire risk around 321 Semillon Cir is moderate, ranking above 47% of the US, with a 0.09% annual chance of wildfire.

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

Wildfire Risk	Moderate above 47% of the US · lower than 72% of California
Wildfire Likelihood	0.09% annual chance
Exposure	Indirect within 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	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 253 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: AT&T.

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