San Mateo County property record for 227 Sylvan Ave, San Mateo, CA 94403
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 1.5 ba · 1,810 sqft · built 1950 |
| Lot Size | 0.127 acres (5,539 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $4,194 (2025) |
| Deeds & Mortgages | Apr 2026 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 039-312-090 |
| Primary APN | 039-312-090 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Building Area | 1,810 sqft Living Area |
| 1st Floor Area | 1,430 sqft |
| Family Room | Family Room |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1950 |
| Lot Area | 5,539 sqft (0.127 acres) |
| Lot Dimensions | 110 ft deep x 50 ft wide |
| Garage Area | 380 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 227 SYLVAN AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94403-3329 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 10 SYLVAN TRACT RSM 29/47 CITY OF SAN MATEO |
| Legal Subdivision | SYLVAN TRACT |
| Legal Lot Number | 10 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2011 |
| Census Tract | 607300 |
227 Sylvan Ave is held in a trust since March 2026.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 1501 BEDFORD AVE, SUNNYVALE, CA 94087-3922 |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Mar 31, 2026 |
| Transfer Doc | 0000017947 |
| Record Updated | Sep 20, 2026 |
| Document Type | Affidavit of Death of Trustee |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Apr 7, 2026 |
| Property Address | 227 SYLVAN AVE, SAN MATEO, CA 94403-3329 |
| Document Number | 0000017947 |
| Instrument Date | Mar 31, 2026 |
| Instrument | 202617947 |
| Transaction Type | Transfer |
| Record Updated | Aug 27, 2026 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 1501 BEDFORD AVE, SUNNYVALE, CA 94087-3922 |
The 2025 property tax bill for 227 Sylvan Ave was $4,194, up 7.2% from the year before.
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 | $134,745 (+2%) Land $37,491 Building $97,254 | ||
| 2025 | $4,194.00 (+7.24%) Homeowner's exemption | $132,104 Land $36,756 Building $95,348 | |
| 2024 | $3,911.00 (+11.33%) | ||
| 2023 | $3,513.00 (+6.65%) Homeowner's exemption | $126,977 Land $35,330 Building $91,647 | $1,934,820 |
| 2022 | $3,294.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 227 Sylvan Ave in Zone X, an area of minimal flood risk, though there have been 4 flood claims nearby since 1998.
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 | 2 in force |
| Nearby Flood Claims | 4 (1998–2022) |
| Claims Outside the SFHA | 4 of 4 |
| Most Recent Claim | Dec 2022 · rainfall accumulation |
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 227 Sylvan 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 716 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 |
May also be available: Etheric Networks, GeoLinks, T-Mobile.
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