San Mateo County property record for 447 Helen Dr, Millbrae, CA 94030
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,430 sqft · built 1948 |
| Lot Size | 0.117 acres (5,087 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $878,000 (Jul 2011) |
| Tax Bill | $7,100 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 021-344-010 |
| Primary APN | 021-344-010 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,430 sqft Living Area |
| 1st Floor Area | 1,430 sqft |
| Family Room | Family Room |
| Year Built | Built 1948 |
|---|---|
| Effective Year Built | Effective 1948 |
| Lot Area | 5,087 sqft (0.117 acres) |
| Lot Dimensions | 79 ft deep x 65 ft wide |
| View / Lot | Corner |
| Garage Area | 380 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 447 HELEN DR |
|---|---|
| City | MILLBRAE |
| State | CA |
| Zip | 94030-1653 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 4 BLOCK 14 MEADOW GLEN RSM 26/7 8 9 |
| Legal Subdivision | MEADOW GLEN |
| Legal Block | 14 |
| Legal Lot Number | 4 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SOUTH SAN FRANCISCO |
| Census Block Group | 1 |
| Census Block | 1012 |
| Census Tract | 604800 |
Source: San Mateo County records · APN 021-344-010
Assessment roll updated July 15, 2026 · Last verified July 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 File |
|---|---|
| Mailing Address | 447 HELEN DR, MILLBRAE, CA 94030-1653 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Jul 01, 2011 · Amount on Record |
| Deed Sale | Jul 01, 2011 · Amount on Record |
| Prior Sale | May 12, 2006 · Amount on Record |
| Deed Document Number | 201174526 |
| Last Transfer Date | Mar 05, 2013 |
| Transfer Doc | 0000040279 |
| Record Updated | Sep 20, 2026 |
Source: San Mateo County records · Assessment roll updated July 15, 2026 · Last verified July 2026
| 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) |
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.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $462,098 (+2%) Land $153,091 Building $309,007 | ||
| 2025 | $7,100.00 (+3.5%) Homeowner's exemption | $453,039 (+4.04%) Land $150,090 Building $302,949 | |
| 2023 | $6,860.00 (+37.53%) Homeowner's exemption | $435,449 Land $144,263 Building $291,186 | $1,372,140 |
| 2022 | $4,988.00 |
Source: FEMA National Flood Hazard Layer as of September 10, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone A, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Claims | 2 (1982) |
| Most Recent Claim | May 1982 · rainfall accumulation |
| Wildfire Risk | Low lower than 97% of the US · lower than 97.8% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
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.
Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| 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 Communications, LLC. Fixed Wireless | 250 / 100 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
May also be available: California Internet, Sail Internet Holdings, Verizon.
Based on FCC filings for 586 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | CITY OF MILLBRAE serves 22,795 people |
|---|---|
| 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 |
| 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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