521 Helen Dr, Millbrae, CA 94030 Property Records

San Mateo County property record for 521 Helen Dr, Millbrae, CA 94030

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,720 sqft · built 1948
Lot Size	0.134 acres (5,844 sqft)
Owner	2 Individual Names on Record
Last Sale	$1,600,000 (Apr 2020)
Tax Bill	$21,697 (2025)
Deeds & Mortgages	Apr 2020 Line of Credit Apr 2020 Sale & Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`021-331-250`

Property Details

APN / Parcel Number

Primary APN	`021-331-250`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,720 sqft Living Area
1st Floor Area	1,290 sqft
Family Room	Family Room
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1948
Effective Year Built	Effective 1948
Architectural Style	Bungalow
Exterior Material	Stucco
Construction Type	Frame
Roof Material	Composition Shingle
Lot Area	5,844 sqft (0.134 acres)
Lot Dimensions	118 ft deep x 50 ft wide
Garage Area	410 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	521 HELEN DR
City	MILLBRAE
State	CA
Zip	94030-1619
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10006
Legal Description	LOT 43 BLOCK 18 MEADOW GLEN UNIT NO 2 RSM 29/27 CITY OF MILLBRAE
Legal Subdivision	MEADOW GLEN UNIT NO 2
Legal Block	18
Legal Lot Number	43
Jurisdiction	SAN MATEO CA
Township / Civil Division	SOUTH SAN FRANCISCO
Census Block Group	1
Census Block	1000
Census Tract	604700

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 Individual Names on Record
Mailing Address	521 HELEN DR, MILLBRAE, CA 94030-1619
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Apr 23, 2020	Deed of Trust, Mortgage · Line of Credit MY CREDIT UNION
Apr 15, 2020	Grant Deed, Transfer · Conventional Mortgage CITIBANK NA
Jan 24, 2020	Deed of Trust, Mortgage · Line of Credit PRIVATE INDIVIDUAL

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 15, 2020 · Amount on Record
Deed Sale	Apr 15, 2020 · Amount on Record
Deed Document Number	202033983
Record Updated	Oct 29, 2026

April 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	521 HELEN DR, MILLBRAE, CA 94030-1619
Transaction Type	Mortgage
Record Updated	Aug 5, 2022
Title Company	TICOR TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000036539
Date	Apr 23, 2020
Instrument	2020-036539

Lender

Name	MY CREDIT UNION
Type	Credit Union
Address	REDWOOD CITY, CA 94063

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

April 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Apr 15, 2020
Property Address	521 HELEN DR, MILLBRAE, CA 94030-1619
Document Number	0000033983
Map Reference	MB 29 PG 27
Instrument Date	Apr 7, 2020
Instrument	2020-033983
Transaction Type	Transfer
Record Updated	Aug 5, 2022
Title Company	NORTH AMERICAN TITLE CO INC

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$1,760.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	521 HELEN DR, MILLBRAE, CA 94030-1619
Investor	Possibly a Property Investor

Mortgage

Document Number	0000033984
Date	Apr 15, 2020
Instrument	2020-033984

Lender

Name	CITIBANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	May 1, 2050

Interest

Rate Type	Adjustable Rate
Rate	2.62%
Type Change Date	May 1, 2030
Change Frequency	Annually
Min Rate At Change	2.25%
Max Rate At Change	7.62%
Index	1-Year LIBOR
Max Rate	7.62%

January 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	521 HELEN DR, MILLBRAE, CA 94030-1619
Document Number	0000009550
Instrument Date	Jan 24, 2020
Transaction Type	Mortgage
Record Updated	Feb 27, 2020
Title Company	TICOR TITLE ORANGE COUNTY BR, TICOR TITLE ORANGE CNTY BR

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	521 HELEN DR MILLBRAE CA 940301619, MILLBRAE, CA 94030-1619

Mortgage

Document Number	0000009550
Date	Feb 4, 2020
Instrument	9550

Lender

Name	PRIVATE INDIVIDUAL
Type	Private Party
Address	REDWOOD CITY, CA 94063

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	300 Months
Due	Feb 3, 2045

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

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

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$1,784,825 (+2%) Land $1,338,620 Building $446,205
2025	$21,697.00 (+7.18%) Homeowner's exemption	$1,749,829 (+4.04%) Land $1,312,373 Building $437,456
2023	$20,244.00 (+9%) Homeowner's exemption	$1,681,883 Land $1,261,413 Building $420,470	$1,627,110
2022	$18,572.00

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

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

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

Wildfire Risk	Low lower than 80% of the US · lower than 88% of California
Wildfire Likelihood	0.01% annual chance
Exposure	Direct burnable vegetation

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	CITY OF MILLBRAE serves 22,795 people · EPA ID CA4110018
Water Source	Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM
Last State Inspection	Apr 2025
Lead	Under 1 ppb (2023–2025) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	1 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 586 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · Fixed Wireless, DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: GeoLinks, Sail Internet, Verizon.

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