Contra Costa County property record for 321 Mare Ln, San Ramon, CA 94583
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 2,776 sqft · built 1982 |
| Lot Size | 0.216 acres (9,400 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $735,000 (Jan 2012) |
| Tax Bill | $11,067 (2025) |
| Deeds & Mortgages | May 2026 Mortgage Apr 2021 Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 209-633-012-7 |
| Primary APN | 209-633-012-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 2,776 sqft Living Area |
| Gross Area | 3,382 sqft |
| 1st Floor Area | 1,456 sqft |
| 2nd Floor Area | 1,320 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1982 |
|---|---|
| Effective Year Built | Effective 1983 |
| Architectural Style | Ranch |
| Exterior Material | Stucco |
| Construction Type | Frame |
| Roof Material | Wood Shingle |
| Lot Area | 9,400 sqft (0.216 acres) |
| Garage Type | Attached |
| Garage Area | 606 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 321 MARE LN |
|---|---|
| City | SAN RAMON |
| State | CA |
| Zip | 94583-2418 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T05324 L0152 B |
| Legal Subdivision | SUBDIVISION 5324 |
| Legal Tract | 05324 |
| Legal Lot Number | 152 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 345115 |
Source: Contra Costa County records · APN 209-633-012-7
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 | 321 MARE LN, SAN RAMON, CA 94583-2418 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Date | Document |
|---|---|
| May 15, 2026 | Deed of Trust, Mortgage · Conventional Mortgage STAR ONE CREDIT UNION |
| Apr 26, 2021 | Deed of Trust, Mortgage · Conventional Mortgage GUARANTEED RATE AFFINITY LLC |
| Aug 29, 2017 | Deed of Trust, Mortgage · Line of Credit MERIWEST CU |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Jan 24, 2012 · Amount on Record |
| Deed Sale | Jan 24, 2012 · Amount on Record |
| Prior Sale | Aug 22, 1996 · Amount on Record |
| Deed Document Number | 201216142 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | May 15, 2026 |
| Property Address | 321 MARE LN, SAN RAMON, CA 94583-2418 |
| Document Number | 0000050911 |
| Instrument Date | May 09, 2026 |
| Instrument | 202650911 |
| Transaction Type | Mortgage |
| Record Updated | Jul 12, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants, 205 |
| Address | 321 MARE LN, SAN RAMON, CA 94583-2418 |
| Document Number | 0000050911, |
|---|---|
| Date | May 15, 2026 |
| Instrument | 202650911 |
| Name | STAR ONE CREDIT UNION |
|---|
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 180 Months |
| Due | Jun 01, 2041 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 5.74% |
| Initial Type | Fixed Rate |
| Max Rate | -1% |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 321 MARE LN, SAN RAMON, CA 94583-2418 |
| Transaction Type | Mortgage |
| Record Updated | Nov 03, 2022 |
| Title Company | CORNERSTONE TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 321 MARE LN, SAN RAMON, CA 94583-2418 |
| Document Number | 0000124694 |
|---|---|
| Date | Apr 26, 2021 |
| Instrument | 2021-124694 |
| Name | GUARANTEED RATE AFFINITY LLC |
|---|---|
| Type | Mortgage Company |
| Address | CHICAGO, IL 60613 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | May 01, 2051 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 321 MARE LN, SAN RAMON, CA 94583-2418 |
| Document Number | 0000164905 |
| Instrument Date | Aug 29, 2017 |
| Transaction Type | Mortgage |
| Record Updated | Sep 14, 2017 |
| Title Company | CHICAGO TITLE COMPANY, CHICAGO TITLE CO |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 321 MARE LN SAN RAMON CA 945832418, SAN RAMON, CA 94583-2418 |
| Document Number | 0000164905 |
|---|---|
| Date | Sep 11, 2017 |
| Instrument | 164905 |
| Name | MERIWEST CU |
|---|---|
| Type | Credit Union |
| Address | SAN JOSE, CA 95153-5353 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 300 Months |
| Due | Sep 10, 2042 |
| Rate Type | Adjustable Rate |
|---|
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 | $941,653 (+2%) Land $630,334 Building $311,319 | |
| 2025 | $11,067.00 (+3.8%) | $923,190 (+4.04%) Land $617,975 Building $305,215 |
| 2023 | $10,662.00 (+0.76%) | $887,343 Land $593,979 Building $293,364 |
| 2022 | $10,582.00 |
Source: FEMA National Flood Hazard Layer as of October 12, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 1 (2022) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
| Wildfire Risk | Moderate above 65% of the US · above 40% of California |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Communications, LLC. Fixed Wireless | 250 / 100 |
May also be available: T-Mobile USA.
Based on FCC filings for 549 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | EAST BAY MUD serves 1,468,000 people |
|---|---|
| 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 as reported to EPA, 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. The full violation and enforcement history is in the system's EPA record.
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