San Mateo County property record for 555 Chadbourne Ave, Millbrae, CA 94030
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 1,770 sqft · built 2002 |
| Lot Size | 0.092 acres (4,000 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $1,200,000 (Oct 2006) |
| Tax Bill | $19,963 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 024-274-010 |
| Primary APN | 024-274-010 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 1,770 sqft Living Area |
| Gross Area | 2,250 sqft |
| 1st Floor Area | 1,000 sqft |
| 2nd Floor Area | 770 sqft |
| Basement Area | 480 sqft |
| Family Room | Family Room |
| Study | Study |
| Year Built | Built 2002 |
|---|---|
| Effective Year Built | Effective 2002 |
| Lot Area | 4,000 sqft (0.092 acres) |
| Lot Dimensions | 100 ft deep x 40 ft wide |
| Garage Type | Basement |
| Garage Area | 480 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 555 CHADBOURNE AVE |
|---|---|
| City | MILLBRAE |
| State | CA |
| Zip | 94030-2418 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R20000 |
| Legal Description | 40 FT ON CHADBOURNE AVE BEG 120 FT ELY FROM ELDER AVE PORTS OF LOTS 8 9 BLOCK 19 MILLBRAE VILLA TRACT |
| Legal Subdivision | MILLBRAE VILLA TRACT |
| Legal Block | 19 |
| Legal Lot Number | 8 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SOUTH SAN FRANCISCO |
| Census Block Group | 3 |
| Census Block | 3008 |
| Census Tract | 604800 |
Source: San Mateo County records · APN 024-274-010
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 | 555 CHADBOURNE AVE, MILLBRAE, CA 94030-2418 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Oct 11, 2006 · Amount on Record |
| Deed Sale | Oct 11, 2006 · Amount on Record |
| Prior Sale | Aug 16, 2002 · Amount on Record |
| Deed Document Number | 2006152896 |
| Last Transfer Date | Oct 27, 2014 |
| Transfer Doc | 0000100204 |
| 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 and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $1,639,886 (+2%) Land $819,943 Building $819,943 | ||
| 2025 | $19,963.00 (+6%) Homeowner's exemption | $1,607,732 (+4.04%) Land $803,866 Building $803,866 | |
| 2023 | $18,833.00 (+10.24%) Homeowner's exemption | $1,545,302 Land $772,651 Building $772,651 | $1,818,360 |
| 2022 | $17,083.00 |
Source: FEMA National Flood Hazard Layer as of September 10, 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| 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 are read at the parcel center point; 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 802 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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