San Mateo County property record for 581 Emerald Ave, San Carlos, CA 94070
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,570 sqft · built 1942 |
| Lot Size | 0.126 acres (5,500 sqft) |
| Owner | Individual Name on File |
| Last Sale | $1,240,000 (Jun 2011) |
| Tax Bill | $19,529 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 051-233-160 |
| Primary APN | 051-233-160 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 2,570 sqft Living Area |
| 1st Floor Area | 1,280 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1942 |
|---|---|
| Effective Year Built | Effective 1942 |
| Lot Area | 5,500 sqft (0.126 acres) |
| Lot Dimensions | 110 ft deep x 50 ft wide |
| Garage Area | 420 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 581 EMERALD AVE |
|---|---|
| City | SAN CARLOS |
| State | CA |
| Zip | 94070-4545 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 11 BLOCK 9 WHITE OAKS TRACT 2 |
| Legal Subdivision | WHITE OAKS TRACT 2 |
| Legal Tract | 2 |
| Legal Block | 9 |
| Legal Lot Number | 11 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2024 |
| Census Tract | 609300 |
581 Emerald Ave is owned and occupied by an individual who bought it in June 2011.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 581 EMERALD AVE, SAN CARLOS, CA 94070-4545 |
| 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.
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jun 30, 2011 · Amount on File |
| Deed Sale | Jun 30, 2011 · Amount on File |
| Deed Document Number | 201173731 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 581 Emerald Ave was $19,529 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 Carlos City |
| Elementary School District | San Carlos Elementary School District (KG - 08) |
| Secondary School District | Sequoia Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $1,620,424 (+2%) Land $810,212 Building $810,212 | ||
| 2025 | $19,529.00 Homeowner's exemption | $1,588,652 Land $794,326 Building $794,326 | |
| 2023 | $18,618.00 (+2.39%) Homeowner's exemption | $1,526,964 Land $763,482 Building $763,482 | $2,151,360 |
| 2022 | $18,184.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 581 Emerald Ave in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 9 (5% premium discount) |
| Nearby Flood Policies | 5 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.
Wildfire risk around 581 Emerald Ave is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 97% of the US · lower than 97.8% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond 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 CARLOS private · serves 34,801 people · EPA ID CA4110007 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Sep 2024 |
| Lead | 6 ppb (2022–2024) 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 869 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 in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: Astound Broadband, T-Mobile.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures