San Mateo County property record for 51 N Delaware St, San Mateo, CA 94401
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 2 ba · 2,530 sqft · built 1940 |
| Lot Size | 0.132 acres (5,750 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $6,636 (2025) |
| Deeds & Mortgages | Jun 2023 Transfer Mar 2023 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 032-333-010 |
| Primary APN | 032-333-010 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Units | 4 Units |
| Stories | 1 Story |
| Building Area | 2,530 sqft Living Area |
| 1st Floor Area | 2,530 sqft |
| Year Built | Built 1940 |
|---|---|
| Effective Year Built | Effective 1940 |
| Architectural Style | Duplex Single |
| Lot Area | 5,750 sqft (0.132 acres) |
| Lot Dimensions | 115 ft deep x 50 ft wide |
| View / Lot | Corner |
| Garage Type | Detached |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 51 N DELAWARE ST |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94401-3217 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | RM0004 |
| Legal Description | LOT 7 BLOCK 30 WESTERN ADDITION TO TOWN OF SAN MATEO RSM 1/52 53 |
| Legal Subdivision | WESTERN ADDITION TO TOWN OF SAN MATEO |
| Legal Block | 30 |
| Legal Lot Number | 7 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1006 |
| Census Tract | 606202 |
51 N Delaware St, a duplex, is held in a trust since June 2023.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 1919 PARROTT DR, SAN MATEO, CA 94402-3920 |
| 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 |
|---|---|
| Jun 26, 2023 | Correction Deed |
| Mar 9, 2023 | Intrafamily Transfer, Transfer |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Jun 21, 2023 |
| Transfer Doc | 0000030332 |
| Record Updated | Sep 20, 2026 |
| Document Type | Correction Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Jun 26, 2023 |
| Property Address | 51 N DELAWARE ST, SAN MATEO, CA 94401-3217 |
| Document Number | 0000030332 |
| Map Reference | MB D PG 48 |
| Instrument Date | Jun 21, 2023 |
| Instrument | 2023-030332 |
| Record Updated | Jul 21, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Living Trust |
| Address | 1919 PARROTT DR, SAN MATEO, CA 94402-3920 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Mar 9, 2023 |
| Property Address | 51 N DELAWARE ST, SAN MATEO, CA 94401-3217 |
| Document Number | 0000010554 |
| Map Reference | MB D PG 48 |
| Instrument Date | Mar 8, 2023 |
| Instrument | 2023-010554 |
| Transaction Type | Transfer |
| Record Updated | Jun 7, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Living Trust |
| Address | 1919 PARROTT DR, SAN MATEO, CA 94402-3920 |
The 2025 property tax bill for 51 N Delaware St was $6,636.
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 |
|---|---|---|
| 2026 | $241,372 (+2%) Land $84,469 Building $156,903 | |
| 2025 | $6,636.00 | $236,640 Land $82,813 Building $153,827 |
| 2023 | $5,988.00 (-1.46%) | $227,453 (+2%) Land $79,599 Building $147,854 |
| 2022 | $6,077.00 | $222,994 Land $78,039 Building $144,955 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 51 N Delaware St in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2022.
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 | 5 in force |
| Nearby Flood Claims | 1 (2022) |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
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 51 N Delaware St 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 791 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 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
| Sonic Telecom Fiber | 1,000 / 1,000 |
| Verizon Fixed Wireless | 1,000 / 75 |
| Unwired Fixed Wireless | 300 / 25 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: GeoLinks, T-Mobile.
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