San Mateo County property record for 409 Sylvan Ave, San Mateo, CA 94403
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 1,957 sqft · built 1940 |
| Lot Size | 0.126 acres (5,500 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $730,000 (Jul 2010) |
| Tax Bill | $15,511 (2025) |
| Deeds & Mortgages | Oct 2023 Line of Credit Aug 2020 Transfer + 2 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 039-311-090 |
| Primary APN | 039-311-090 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,957 sqft Living Area |
| 1st Floor Area | 1,074 sqft |
| Family Room | Family Room |
| Year Built | Built 1940 |
|---|---|
| Effective Year Built | Effective 1940 |
| Lot Area | 5,500 sqft (0.126 acres) |
| Lot Dimensions | 110 ft deep x 50 ft wide |
| Garage Area | 226 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 409 SYLVAN AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94403-3333 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 9 BLOCK 14 SAN MATEO TERRACE MAP NO 5 RSM 22/35 CITY OF SAN MATEO |
| Legal Subdivision | SAN MATEO TERRACE MAP NO 5 |
| Legal Block | 14 |
| Legal Lot Number | 9 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2015 |
| Census Tract | 607300 |
409 Sylvan Ave is held in a trust since August 2020.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 409 SYLVAN AVE, SAN MATEO, CA 94403-3333 |
| Owner Type | Company |
| Vesting | Trust |
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 |
|---|---|
| Oct 11, 2023 | Deed of Trust, Mortgage · Line of Credit SAN MATEO CU |
| Aug 12, 2020 | Quit Claim Deed, Transfer FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO |
| Aug 12, 2020 | Intrafamily Transfer, Transfer · Conventional Mortgage UNITED WHOLESALE MORTGAGE |
| Jun 15, 2017 | Quit Claim Deed, Transfer Quitclaim |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 19, 2010 · Amount on File |
| Deed Sale | Jul 19, 2010 · Amount on File |
| Deed Document Number | 201078689 |
| Last Transfer Date | Aug 4, 2020 |
| Transfer Doc | 0000080005 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 409 SYLVAN AVE, SAN MATEO, CA 94403-3333 |
| Transaction Type | Mortgage |
| Record Updated | Nov 7, 2023 |
| Title Company | ATLANTIS TITLE COMPANY, ATLAS TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 409 SYLVAN AVE, SAN MATEO, CA 94403-3333 |
| Document Number | 0000050601 |
|---|---|
| Date | Oct 11, 2023 |
| Instrument | 2023-050601 |
| Name | SAN MATEO CU |
|---|---|
| Type | Credit Union |
| Address | REDWOOD CITY, CA 94063 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Term | 300 Months |
| Due | Oct 1, 2048 |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Aug 12, 2020 |
| Property Address | 409 SYLVAN AVE, SAN MATEO, CA 94403-3333 |
| Document Number | 0000080005 |
| Instrument Date | Aug 4, 2020 |
| Instrument | 80005 |
| Transaction Type | Transfer |
| Record Updated | Sep 7, 2020 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 409 SYLVAN AVE SAN MATEO CA 944033333, SAN MATEO, CA 94403-3333 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Aug 12, 2020 |
| Property Address | 409 SYLVAN AVE, SAN MATEO, CA 94403-3333 |
| Document Number | 0000080002 |
| Map Reference | MB 22 PG 35 |
| Instrument Date | Aug 4, 2020 |
| Instrument | 2020-080002 |
| Transaction Type | Transfer |
| Record Updated | Aug 5, 2022 |
| Title Company | FIDELITY NATIONAL TITLE CO |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 409 SYLVAN AVE, SAN MATEO, CA 94403-3333 |
| Document Number | 0000080003 |
|---|---|
| Date | Aug 12, 2020 |
| Instrument | 2020-080003 |
| Name | UNITED WHOLESALE MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Sep 1, 2050 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Jun 15, 2017 |
| Property Address | 409 SYLVAN AVE, SAN MATEO, CA 94403-3333 |
| Document Number | 0000051457 |
| Instrument Date | May 31, 2017 |
| Instrument | 51457 |
| Transaction Type | Transfer |
| Record Updated | Jan 3, 2018 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 409 SYLVAN AVE SAN MATEO CA 944033333, SAN MATEO, CA 94403-3333 |
The 2025 property tax bill for 409 Sylvan Ave was $15,511.
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 | $1,191,772 (+2%) Land $476,977 Building $714,795 | ||
| 2025 | $15,511.00 | $1,168,405 Land $467,625 Building $700,780 | |
| 2023 | $14,552.00 (+1.33%) | $1,123,036 Land $449,467 Building $673,569 | $2,077,650 |
| 2022 | $14,361.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 409 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 409 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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