Contra Costa County property record for 100 Castleton Ct, San Ramon, CA 94583 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,534 sqft · built 1979 |
| Lot Size | 0.166 acres (7,220 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $806,000 (Aug 2015) |
| Tax Bill | $11,402 (2025) |
| Deeds & Mortgages | Dec 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 209-560-001-7 |
| Primary APN | 209-560-001-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 1,534 sqft Living Area |
| Gross Area | 1,974 sqft |
| 1st Floor Area | 1,534 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1979 |
|---|---|
| Effective Year Built | Effective 1990 |
| Architectural Style | Ranch |
| Exterior Material | Stucco |
| Construction Type | Frame |
| Roof Material | Wood Shingle |
| Lot Area | 7,220 sqft (0.166 acres) |
| Garage Type | Attached |
| Garage Area | 440 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 100 CASTLETON CT |
|---|---|
| City | SAN RAMON |
| State | CA |
| Zip | 94583-1839 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T05360 L0001 B EX MR |
| Legal Subdivision | SUBDIVISION 5360 |
| Legal Tract | 05360 |
| Legal Lot Number | 1 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 345116 |
Source: Contra Costa County records · APN 209-560-001-7
Assessment roll updated July 14, 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 | 2 Individual Names on File |
|---|---|
| Mailing Address | 100 CASTLETON CT, SAN RAMON, CA 94583-1839 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Aug 20, 2015 · Amount on Record |
| Deed Sale | Aug 20, 2015 · Amount on Record |
| Prior Sale | Dec 02, 2009 · Amount on Record |
| Deed Document Number | 2015173448 |
| Last Transfer Date | Dec 19, 2024 |
| Transfer Doc | 0000137830 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 100 CASTLETON CT, SAN RAMON, CA 94583-1839 |
| Transaction Type | Mortgage |
| Record Updated | Nov 03, 2022 |
| Name | Verified Name |
|---|---|
| Address | 100 CASTLETON CT, SAN RAMON, CA 94583-1839 |
| Document Number | 0000340664 |
|---|---|
| Date | Dec 17, 2021 |
| Instrument | 2021-340664 |
| Name | BETTER MORTGAGE CORPORATION |
|---|---|
| Type | Mortgage Company |
| Address | NEW YORK, NY 10007 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 175 Months |
| Due | Jul 01, 2036 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | San Ramon City |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $973,215 (+2%) Land $706,368 Building $266,847 | |
| 2025 | $11,402.00 (+3.8%) | $954,133 (+4.04%) Land $692,518 Building $261,615 |
| 2023 | $10,985.00 (+0.74%) | $917,085 Land $665,628 Building $251,457 |
| 2022 | $10,904.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133451161, 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 6 (20% premium discount) |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 1 (2025) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Feb 2025, other causes |
| 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 267 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 2,000 |
| Unwired | Fixed Wireless | 300 / 25 |
| Verizon | Fixed Wireless | 300 / 20 |
| Etheric Communications, LLC. | Fixed Wireless (licensed-by-rule) | 250 / 100 |
May also be available at this address: AT&T, T-Mobile USA. Availability varies by address; speeds are provider-advertised maximums, not measured.
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