San Mateo County property record for 2644 Isabelle Ave, San Mateo, CA 94403
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 2,110 sqft · built 1937 |
| Lot Size | 0.157 acres (6,839 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $455,000 (Oct 1996) |
| Tax Bill | $10,213 (2025) |
| Deeds & Mortgages | Aug 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 039-332-100 |
| Primary APN | 039-332-100 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 2,110 sqft Living Area |
| Gross Area | 2,650 sqft |
| 1st Floor Area | 1,250 sqft |
| Basement Area | 540 sqft |
| Family Room | Family Room |
| Year Built | Built 1937 |
|---|---|
| Effective Year Built | Effective 1937 |
| Lot Area | 6,839 sqft (0.157 acres) |
| Lot Dimensions | 137 ft deep x 50 ft wide |
| Garage Type | Basement |
| Garage Area | 540 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 2644 ISABELLE AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94403-2337 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 4 BLOCK 6 SAN MATEO TERRACE RSM 19/73 74 CITY OF SAN MATEO |
| Legal Subdivision | SAN MATEO TERRACE |
| Legal Block | 6 |
| Legal Lot Number | 4 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 3 |
| Census Block | 3009 |
| Census Tract | 607400 |
2644 Isabelle Ave is owned and occupied by two individuals who acquired it in March 2009.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 2644 ISABELLE AVE, SAN MATEO, CA 94403-2337 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 Sale | Oct 29, 1996 · Amount on File |
| Deed Sale | Oct 29, 1996 · Amount on File |
| Deed Document Number | 1996133426 |
| Last Transfer Date | Mar 25, 2009 |
| Transfer Doc | 0000035997 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 2644 ISABELLE AVE, SAN MATEO, CA 94403-2337 |
| Transaction Type | Mortgage |
| Record Updated | Aug 30, 2021 |
| Title Company | AMROCK INC |
| Name | Verified Name |
|---|---|
| Address | 2644 ISABELLE AVE, SAN MATEO, CA 94403-2337 |
| Document Number | 0000115963 |
|---|---|
| Date | Aug 6, 2021 |
| Instrument | 2021-115963 |
| Name | QUICKEN LOANS LLC |
|---|---|
| Type | Mortgage Company |
| Address | DETROIT, MI 48226 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 180 Months |
| Due | Aug 1, 2036 |
The 2025 property tax bill for 2644 Isabelle Ave was $10,213 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 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 | $755,856 (+2%) Land $377,928 Building $377,928 | ||
| 2025 | $10,213.00 Homeowner's exemption | $741,036 Land $370,518 Building $370,518 | |
| 2023 | $9,851.00 (+0.93%) Homeowner's exemption | $712,262 Land $356,131 Building $356,131 | $1,733,940 |
| 2022 | $9,760.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 2644 Isabelle Ave in Zone X, an area of minimal flood risk, though there have been 4 flood claims nearby since 1978.
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 | 1 in force |
| Nearby Flood Claims | 4 (1978–1986) |
| Most Recent Claim | Feb 1986 · Severe Storms & Flooding |
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 2644 Isabelle 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 799 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 | 1,500 / 50 |
May also be available: Etheric Networks, GeoLinks, T-Mobile, Verizon.
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