San Mateo County property record for 284 W 20th Ave, San Mateo, CA 94403
| Property Type | Condominium |
|---|---|
| Details | 2 bd · 2.5 ba · 1,507 sqft · built 1996 |
| Lot Size | 2.5 acres (109,155 sqft) |
| Owner | Individual Name on File |
| Last Sale | $1,150,000 (Sep 2021) |
| Tax Bill | $15,422 (2025) |
| Deeds & Mortgages | Sep 2021 Sale & Mortgage Dec 2018 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 103-730-160 |
| Primary APN | 103-730-160 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 5 Rooms |
| Units | 122 Units |
| Stories | 2 Stories |
| Building Area | 1,507 sqft Living Area |
| Game Room | Game Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1996 |
|---|---|
| Effective Year Built | Effective 1996 |
| Architectural Style | Condo/Apartment |
| Lot Area | 109,155 sqft |
| View / Lot | End Unit |
| Garage Type | Carport |
| Carport | Carport |
| Street Address | 284 W 20TH AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94403-1399 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Condominium |
| Local Zoning Code | E100R4 |
| Legal Description | UNIT 284 CORTE BELLA 95127665 |
| Legal Subdivision | CORTE BELLA |
| Legal Lot Number | 1 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 607400 |
284 W 20th Ave, a condominium, is owned and occupied by an individual who bought it in September 2021.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 284 W 20TH AVE, SAN MATEO, CA 94403-1399 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Sep 24, 2021 | Grant Deed, Transfer · Conventional Mortgage WELLS FARGO BANK NA |
| Dec 31, 2018 | Grant Deed, Transfer FIRST AMERICAN TITLE |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Sep 24, 2021 · Amount on File |
| Deed Sale | Sep 24, 2021 · Amount on File |
| Prior Sale | Jul 23, 1996 · Amount on File |
| Deed Document Number | 2021137068 |
| Prior Transfer Date | Feb 3, 2004 |
| Prior Transfer Doc | 0000035323 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Sep 24, 2021 |
| Property Address | 284 W 20TH AVE, SAN MATEO, CA 94403-1399 |
| Document Number | 0000137068 |
| Map Reference | DOC 95127665 |
| Instrument Date | Sep 21, 2021 |
| Instrument | 2021-137068 |
| Transaction Type | Transfer |
| Record Updated | Oct 25, 2021 |
| Title Company | LAWYERS TITLE COMPANY/CA, LAWYERS TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $7,015.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 284 W 20TH AVE, SAN MATEO, CA 94403-1399 |
| Document Number | 0000137069 |
|---|---|
| Date | Sep 24, 2021 |
| Instrument | 2021-137069 |
| Name | WELLS FARGO BANK NA |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Oct 1, 2051 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Dec 31, 2018 |
| Property Address | 284 W 20TH AVE, SAN MATEO, CA 94403-1399 |
| Document Number | 0000101703 |
| Instrument Date | Dec 20, 2018 |
| Instrument | 101703 |
| Transaction Type | Transfer |
| Record Updated | Jan 17, 2019 |
| Title Company | FIRST AMERICAN TITLE |
| Amount | Amount on Record |
|---|---|
| Tax | $220.00 |
| Amount Accuracy | Full Value |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 66 BOVET RD #100 SAN MATEO CA 944023126, 100, SAN MATEO, CA 94402-3126 |
The 2025 property tax bill for 284 W 20th Ave was $15,422 with a homeowner's exemption.
Source: San Mateo County assessment roll, as of July 15, 2026
| Type | Name |
|---|---|
| State | California |
| County | San Mateo County |
| Municipality | San Mateo City |
| Elementary School District | San Mateo-Foster City Elementary School District (KG - 08) |
| Secondary School District | San Mateo Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $1,244,795 (+2%) Land $373,438 Building $871,357 | ||
| 2025 | $15,422.00 Homeowner's exemption | $1,220,388 Land $366,116 Building $854,272 | |
| 2023 | $14,113.00 (-5.08%) Homeowner's exemption | $1,100,000 Land $330,000 Building $770,000 | $909,900 |
| 2022 | $14,868.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 284 W 20th Ave in Zone X, an area of minimal flood risk.
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 Policies | 1 in force |
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.
The area around 284 W 20th Ave has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 | CALIFORNIA WATER SERVICE - SAN MATEO private · serves 103,536 people · EPA ID CA4110008 |
|---|---|
| Water Source | Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM |
| Last State Inspection | Mar 2025 |
| Lead | 4 ppb (2023–2025) action level 15 ppb |
| 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.
Source: FCC Broadband Data Collection, based on 423 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 · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks, Verizon.
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