320 Roundhill Pl, Clayton, CA 94517 Property Records

Contra Costa County property record for 320 Roundhill Pl, Clayton, CA 94517

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,324 sqft · built 1976
Lot Size	0.436 acres (18,975 sqft)
Owner	Company Name on Record
Tax Bill	$6,219 (2025)
Deeds & Mortgages	Aug 2023 Transfer Sep 2022 Reverse Mortgage
Flood Zone	Zone X (minimal risk)
APN	`119-392-005-3`

Property Details

APN / Parcel Number

Primary APN	`119-392-005-3`
Alternative APN	`119-392-005`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	11 Rooms
Stories	2 Stories
Building Area	2,324 sqft Living Area
1st Floor Area	1,422 sqft
2nd Floor Area	902 sqft

Exterior

Year Built	Built 1976
Effective Year Built	Effective 1977
Lot Area	18,975 sqft (0.436 acres)
Garage Type	Attached
Garage Area	513 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	320 ROUNDHILL PL
City	CLAYTON
State	CA
Zip	94517-1391
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R12
Legal Description	TRACT 4654 LOT 16
Legal Subdivision	SUBDIVISION 4654
Legal Tract	4654
Legal Lot Number	16
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	3
Census Block	3006
Census Tract	355306

Owner

Source: Contra Costa County records, as of July 14, 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 Record
Mailing Address	320 ROUNDHILL PL, CLAYTON, CA 94517-1391
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Aug 29, 2023	Intrafamily Transfer, Transfer
Sep 12, 2022	Intrafamily Transfer, Transfer · Reverse Mortgage REVERSE MORTGAGE FUNDING LLC

Assessor's Deed Record

Deed Names	Name on Deed
Last Transfer Date	Aug 22, 2023
Transfer Doc	0000083382
Record Updated	Oct 29, 2026

August 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Aug 29, 2023
Property Address	320 ROUNDHILL PL, CLAYTON, CA 94517-1391
Document Number	0000083382
Map Reference	MB 179 PG 46
Instrument Date	Aug 22, 2023
Instrument	2023-083382
Transaction Type	Transfer
Record Updated	Sep 8, 2023

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	Revocable Trust
Address	320 ROUNDHILL PL, CLAYTON, CA 94517-1391

September 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Sep 12, 2022
Property Address	320 ROUNDHILL PL, CLAYTON, CA 94517-1391
Document Number	0000138211
Map Reference	MB 179 PG 46
Instrument Date	Jul 14, 2022
Instrument	2022-138211
Transaction Type	Transfer
Record Updated	Nov 3, 2022
Title Company	CHICAGO TITLE COMPANY

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	320 ROUNDHILL PL, CLAYTON, CA 94517-1391

Mortgage

Document Number	0000138212
Date	Sep 12, 2022
Instrument	2022-138212

Lender

Name	REVERSE MORTGAGE FUNDING LLC
Type	Reverse Mortgage Lender

Agreement

Type	Reverse Mortgage
Amount	Amount Recorded

Interest

Rate Type	Fixed Rate

Tax Assessment & Valuation

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		$448,032 (+2%) Land $124,839 Building $323,193
2025	$6,219.00 (+4.82%)	$439,248 (+4.04%) Land $122,392 Building $316,856
2023	$5,933.00 (+4.18%)	$422,194 Land $117,641 Building $304,553
2022	$5,695.00

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

Flood

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
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

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

Wildfire Risk	Moderate above 52% of the US · lower than 69% of California
Wildfire Likelihood	0.1% 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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