San Mateo County property record for 664 Walnut St, San Carlos, CA 94070 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 2,010 sqft · built 1940 |
| Lot Size | 0.178 acres (7,750 sqft) |
| Owner | Company Name on File |
| Last Sale | $950,000 (Jul 2004) |
| Tax Bill | $11,031 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 050-131-100 |
| Primary APN | 050-131-100 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Building Area | 2,010 sqft Living Area |
| 1st Floor Area | 1,370 sqft |
| Family Room | Family Room |
| Study | Study |
| Year Built | Built 1940 |
|---|---|
| Effective Year Built | Effective 1940 |
| Lot Area | 7,750 sqft (0.178 acres) |
| Lot Dimensions | 155 ft deep x 50 ft wide |
| Garage Area | 380 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 664 WALNUT ST |
|---|---|
| City | SAN CARLOS |
| State | CA |
| Zip | 94070-3118 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | SLY 50 FT OF LOT 5 BLOCK 24 AMEND MAP TOWN OF SAN CARLOS |
| Legal Subdivision | TOWN OF SAN CARLOS |
| Legal Block | 24 |
| Legal Lot Number | 5 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2004 |
| Census Tract | 609202 |
Source: San Mateo County records · APN 050-131-100
Assessment roll updated July 15, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 664 WALNUT ST, SAN CARLOS, CA 94070-3118 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Jul 13, 2004 · Amount on Record |
| Deed Sale | Jul 13, 2004 · Amount on Record |
| Prior Sale | Apr 24, 2002 · Amount on Record |
| Deed Document Number | 2004143779 |
| Prior Transfer Date | May 14, 2002 |
| Prior Transfer Doc | 0000097161 |
| Record Updated | Sep 20, 2026 |
Source: San Mateo County records · Assessment roll updated July 15, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | San Mateo County |
| Municipality | San Carlos City |
| Elementary School District | San Carlos Elementary School District (KG - 08) |
| Secondary School District | Sequoia Union High School District (09 - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $843,812 (+2%) Land $421,906 Building $421,906 | ||
| 2025 | $11,031.00 (+4.9%) Homeowner's exemption | $827,268 (+4.04%) Land $413,634 Building $413,634 | |
| 2023 | $10,516.00 (+2.2%) Homeowner's exemption | $795,146 Land $397,573 Building $397,573 | $1,521,810 |
| 2022 | $10,290.00 |
Source: FEMA National Flood Hazard Layer, San Mateo County (06081C), updated September 10, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060816092022, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Community Rating System | Class 9 (5% premium discount) |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 4 (1986–2010) |
| Claims Outside the SFHA | 2 of 4 |
| Most Recent Claim | Jan 2010, rainfall accumulation |
| Claims By Storm |
|
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
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.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 738 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| AT&T | Fiber | 5,000 / 5,000 |
| Xfinity | Cable | 2,000 / 250 |
| Sonic Telecom | Fiber | 1,000 / 1,000 |
| Verizon | Fixed Wireless | 300 / 20 |
| Etheric Communications, LLC. | Fixed Wireless (licensed-by-rule) | 250 / 100 |
| T-Mobile USA | Fixed Wireless | 100 / 20 |
May also be available at this address: AT&T, California Internet. Availability varies by address; speeds are provider-advertised maximums, not measured.
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