Contra Costa County property record for 100 Cobblestone Ln, San Ramon, CA 94583
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,225 sqft · built 1984 |
| Lot Size | 0.215 acres (9,348 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $7,134 (2025) |
| Deeds & Mortgages | Jul 2017 Transfer Jul 2017 Transfer + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 209-580-010-4 |
| Primary APN | 209-580-010-4 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 2,225 sqft Living Area |
| Gross Area | 2,655 sqft |
| 1st Floor Area | 1,279 sqft |
| 2nd Floor Area | 946 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1984 |
|---|---|
| Effective Year Built | Effective 2008 |
| Architectural Style | Contemporary |
| Exterior Material | Wood Siding |
| Roof Material | Wood Shingle |
| Lot Area | 9,348 sqft (0.215 acres) |
| Garage Type | Attached |
| Garage Area | 430 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 100 COBBLESTONE LN |
|---|---|
| City | SAN RAMON |
| State | CA |
| Zip | 94583-1755 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T05379 L0019 B |
| Legal Subdivision | SUBDIVISION 5379 |
| Legal Tract | 05379 |
| Legal Lot Number | 19 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 345206 |
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 | 100 COBBLESTONE LN, SAN RAMON, CA 94583-1755 |
| Owner Type | Company |
| Vesting | Trust |
| Date | Document |
|---|---|
| Jul 20, 2017 | Quit Claim Deed, Transfer ATTORNEY ONLY |
| Jul 20, 2017 | Quit Claim Deed, Transfer ATTORNEY ONLY |
| Jul 20, 2017 | Quit Claim Deed, Transfer ATTORNEY ONLY |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Jul 12, 2017 |
| Transfer Doc | 0000130044 |
| Record Updated | Sep 20, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jul 20, 2017 |
| Property Address | 100 COBBLESTONE LN, SAN RAMON, CA 94583-1755 |
| Document Number | 0000130045 |
| Instrument Date | Jul 12, 2017 |
| Instrument | 130045 |
| Transaction Type | Transfer |
| Record Updated | Jul 25, 2017 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 100 COBBLESTONE LN SAN RAMON CA 945831755, SAN RAMON, CA 94583-1755 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jul 20, 2017 |
| Property Address | 100 COBBLESTONE LN, SAN RAMON, CA 94583-1755 |
| Document Number | 0000130043 |
| Instrument Date | Jul 12, 2017 |
| Instrument | 130043 |
| Transaction Type | Transfer |
| Record Updated | Jul 25, 2017 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 100 COBBLESTONE LN SAN RAMON CA 945831755, SAN RAMON, CA 94583-1755 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jul 20, 2017 |
| Property Address | 100 COBBLESTONE LN, SAN RAMON, CA 94583-1755 |
| Document Number | 0000130044 |
| Instrument Date | Jul 12, 2017 |
| Instrument | 130044 |
| Transaction Type | Transfer |
| Record Updated | Jul 25, 2017 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Separate Estate/Property |
| Address | 100 COBBLESTONE LN SAN RAMON CA 945831755, SAN RAMON, CA 94583-1755 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | San Ramon City |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $571,147 (+2%) Land $247,555 Building $323,592 | |
| 2025 | $7,134.00 (+3.95%) | $559,949 (+4.04%) Land $242,701 Building $317,248 |
| 2023 | $6,863.00 (+0.76%) | $538,208 Land $233,278 Building $304,930 |
| 2022 | $6,811.00 |
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
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 84% of the US · above 64% of California |
|---|---|
| Wildfire Likelihood | 0.8% annual chance |
| Exposure | Indirect 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 | 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 160 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 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
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