Contra Costa County property record for 920 Underhill Dr, Alamo, CA 94507
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 4.5 ba · 3,520 sqft · built 1959 |
| Lot Size | 0.374 acres (16,280 sqft) |
| Owner | Company Name on Record |
| Last Sale | $355,000 (Aug 1996) |
| Tax Bill | $12,784 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 201-063-009-9 |
| Primary APN | 201-063-009-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 13 Rooms |
| Stories | 1 Story |
| Building Area | 3,520 sqft Living Area |
| 1st Floor Area | 3,520 sqft |
| Year Built | Built 1959 |
|---|---|
| Effective Year Built | Effective 1973 |
| Lot Area | 16,280 sqft (0.374 acres) |
| Garage Type | Attached |
| Garage Area | 483 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 920 UNDERHILL DR |
|---|---|
| City | ALAMO |
| State | CA |
| Zip | 94507-2449 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R20 |
| Legal Description | TRACT 2604 POR LOT 2 |
| Legal Subdivision | PORS RO SAN RAMON & |
| Legal Tract | 2604 |
| Legal Lot Number | 2 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2003 |
| Census Tract | 345204 |
Source: Contra Costa County records, as of July 14, 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 Record |
|---|---|
| Mailing Address | 920 UNDERHILL DR, ALAMO, CA 94507-2449 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 15, 1996 · Amount on Record |
| Deed Sale | Aug 15, 1996 · Amount on Record |
| Deed Document Number | 1996152634 |
| Last Transfer Date | Sep 12, 1997 |
| Transfer Doc | 0000177378 |
| Record Updated | Oct 29, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,114,535 (+2%) Land $431,922 Building $682,613 | |
| 2025 | $12,784.00 (+3.72%) Homeowner's exemption | $1,092,682 (+4.04%) Land $423,453 Building $669,229 |
| 2023 | $12,325.00 (+0.75%) Homeowner's exemption | $1,050,253 Land $407,010 Building $643,243 |
| 2022 | $12,233.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective October 12, 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 |
| Flood Insurance Cost | Premium on Record median of 11 policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 11 in force |
| Nearby Flood Claims | 5 (1993–2012) |
| Claims Outside the SFHA | 3 of 5 |
| Most Recent Claim | Dec 2012 · 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 70% of the US · above 45% of California |
|---|---|
| Wildfire Likelihood | 0.3% annual chance |
| Exposure | Direct burnable vegetation |
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 | EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2021 |
| Lead | Under 1 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. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 198 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
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