San Mateo County property record for 1020 Chadbourne Ave, Millbrae, CA 94030
| Property Type | Duplex |
|---|---|
| Details | 8 bd · 3 ba · 3,330 sqft · built 1945 |
| Lot Size | 0.198 acres (8,625 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $1,380,000 (Apr 2008) |
| Tax Bill | $25,826 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 024-256-070 |
| Primary APN | 024-256-070 |
|---|
| Bedrooms | 8 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 13 Rooms |
| Units | 2 Units |
| Stories | 1 Story |
| Building Area | 3,330 sqft Living Area |
| 1st Floor Area | 3,330 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1945 |
|---|---|
| Effective Year Built | Effective 1945 |
| Architectural Style | Duplex Single |
| Lot Area | 8,625 sqft (0.198 acres) |
| Lot Dimensions | 115 ft deep x 75 ft wide |
| Parking Spaces | 4 Parking Spaces |
| Street Address | 1020 CHADBOURNE AVE |
|---|---|
| City | MILLBRAE |
| State | CA |
| Zip | 94030-2306 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | R20000 |
| Legal Description | LOT 5 BLOCK 30 LOT 6 BLOCK 30 LOT 7 BLOCK 30 RESUB OF BLOCKS23 30 33 34 35 MILLBRAE VILLA TRACT |
| Legal Subdivision | MILLBRAE VILLA TRACT |
| Legal Block | 30,23 |
| Legal Lot Number | 5,6,7 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SOUTH SAN FRANCISCO |
| Census Block Group | 3 |
| Census Block | 3014 |
| Census Tract | 604800 |
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 | Individual Name on Record |
|---|---|
| Mailing Address | 1030 CHADBOURNE AVE, MILLBRAE, CA 94030-2306 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Tenants in Common |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Apr 18, 2008 · Amount on Record |
| Deed Sale | Apr 18, 2008 · Amount on Record |
| Deed Document Number | 200844225 |
| Prior Transfer Date | Jul 11, 1995 |
| Prior Transfer Doc | 0000071664 |
| Record Updated | Oct 29, 2026 |
Source: San Mateo County assessment roll, as of July 15, 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) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,973,191 (+2%) Land $924,448 Building $1,048,743 | |
| 2025 | $25,826.00 (+7.21%) Homeowner's exemption | $1,934,502 (+4.04%) Land $906,322 Building $1,028,180 |
| 2023 | $24,089.00 (+16.29%) Homeowner's exemption | $1,859,385 Land $871,129 Building $988,256 |
| 2022 | $20,714.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective September 10, 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 |
Values are read at the parcel center point; lenders make the official flood determination.
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 | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
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 |
| 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.
Source: FCC Broadband Data Collection, based on 802 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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