3233 Upper Lock Ave, Belmont, CA 94002 Property Records

San Mateo County property record for 3233 Upper Lock Ave, Belmont, CA 94002

Property Summary

Property Type	Single Family Home
Details	2 bd · 2 ba · 1,910 sqft · built 1985
Lot Size	0.317 acres (13,790 sqft)
Owner	2 Company Names on Record
Last Sale	$895,000 (Sep 2003)
Tax Bill	$16,034 (2025)
Deeds & Mortgages	May 2021 Mortgage May 2021 Transfer
Flood Zone	Zone X (minimal risk)
APN	`043-122-400`

Property Details

APN / Parcel Number

Primary APN	`043-122-400`

Interior

Bedrooms	2 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,910 sqft Living Area
Gross Area	2,720 sqft
1st Floor Area	1,910 sqft
Basement Area	810 sqft
Family Room	Family Room

Exterior

Year Built	Built 1985
Effective Year Built	Effective 1985
Lot Area	13,790 sqft (0.317 acres)
Lot Dimensions	130 ft deep x 100 ft wide
Garage Type	Basement
Garage Area	810 sqft
Parking Spaces	3 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	3233 UPPER LOCK AVE
City	BELMONT
State	CA
Zip	94002-1349
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10000
Legal Description	LOTS 30 & 31 BLK 94 BELMONT COUNTRY CLUB PROP SUB
Legal Subdivision	BELMONT COUNTRY CLUB PROP SUB
Legal Block	94
Legal Lot Number	30,31
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	5
Census Block	5005
Census Tract	608800

Owner

Source: San Mateo County records, as of July 15, 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	3233 UPPER LOCK AVE, BELMONT, CA 94002-1349
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
May 20, 2021	Intrafamily Transfer, Transfer · Conventional Mortgage QUICKEN LOANS LLC
May 20, 2021	Intrafamily Transfer, Transfer ATLAS TITLE COMPANY

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 16, 2003 · Amount on Record
Deed Sale	Sep 16, 2003 · Amount on Record
Prior Sale	Nov 30, 2001 · Amount on Record
Deed Document Number	2003265439
Last Transfer Date	Dec 5, 2012
Transfer Doc	0000008124
Record Updated	Sep 20, 2026

May 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SAN MATEO CA
Recording Date	May 20, 2021
Property Address	3233 UPPER LOCK AVE, BELMONT, CA 94002-1349
Document Number	0000079446
Map Reference	MB 14 PG 65-68
Instrument Date	Apr 23, 2021
Instrument	2021-079446
Transaction Type	Transfer
Record Updated	Jun 10, 2021
Title Company	ATLANTIS TITLE COMPANY, ATLAS 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	3233 UPPER LOCK AVE, BELMONT, CA 94002-1349

Mortgage

Document Number	0000079447
Date	May 20, 2021
Instrument	2021-079447

Lender

Name	QUICKEN LOANS LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	241 Months
Due	Jun 1, 2041

May 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SAN MATEO CA
Recording Date	May 20, 2021
Property Address	3233 UPPER LOCK AVE, BELMONT, CA 94002-1349
Document Number	0000079448
Map Reference	MB 14 PG 65-68
Instrument Date	Apr 23, 2021
Instrument	2021-079448
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	ATLAS 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
Relationship	Revocable Trust
Address	3233 UPPER LOCK AVE, BELMONT, CA 94002-1349

Tax Assessment & Valuation

Source: San Mateo County assessment roll, as of July 15, 2026

Property Jurisdictions

Type	Name
State	California
Municipality	Belmont City
County	San Mateo County
Elementary School District	Belmont-Redwood Shores Elementary School District (KG - 08)
Secondary School District	Sequoia Union High School District (09 - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$1,297,936 (+2%) Land $648,968 Building $648,968
2025	$16,034.00 (+6.35%) Homeowner's exemption	$1,272,488 (+4.04%) Land $636,244 Building $636,244
2023	$15,076.00 (+1.56%) Homeowner's exemption	$1,223,078 Land $611,539 Building $611,539	$3,561,390
2022	$14,845.00

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

Source: FEMA National Flood Hazard Layer, effective September 10, 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 Claims	1 (1980)
Most Recent Claim	Jan 1980 · tidal / storm surge

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	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	MID-PENINSULA WATER DISTRICT serves 31,059 people · EPA ID CA4110001
Water Source	Purchased surface water from several systems
Last State Inspection	Feb 2025
Lead	Under 1 ppb (2022–2024) 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 434 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Sonic Telecom Fiber	10,000 / 10,000
AT&T Fiber	5,000 / 5,000
Xfinity Cable	2,000 / 250

May also be available: Etheric Networks, T-Mobile, Verizon.

Cell Coverage

5G (outdoors only) and 4G LTE

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