Contra Costa County property record for 1350 Carlback Ave, Walnut Creek, CA 94596
| Property Type | Commercial Office |
|---|---|
| Details | 5 ba · 28,596 sqft · built 1982 |
| Lot Size | 0.44 acres (19,166 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $5,000,000 (Apr 2000) |
| Tax Bill | $74,922 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 178-352-015-6 |
| Primary APN | 178-352-015-6 |
|---|---|
| Alternative APN |
|
| Full Baths | 5 Baths |
|---|---|
| Total Rooms | 13 Rooms |
| Stories | 1 Story |
| Building Area | 28,596 sqft Gross Area |
| 1st Floor Area | 28,596 sqft |
| Year Built | Built 1982 |
|---|---|
| Effective Year Built | Effective 1984 |
| Exterior Material | Brick Veneer |
| Construction Type | Steel Frame |
| Roof Type | Flat |
| Roof Material | Composition Shingle |
| Lot Area | 19,166 sqft (0.44 acres) |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Street Address | 1350 CARLBACK AVE |
|---|---|
| City | WALNUT CREEK |
| State | CA |
| Zip | 94596-4284 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Commercial Office |
| Local Zoning Code | OC |
| Legal Description | POR RO LAS JUNTAS |
| Legal Subdivision | LAS JUNTAS RHO |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2004 |
| Census Tract | 339003 |
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 | Individual Name on Record |
|---|---|
| Mailing Address | 883 4TH ST, SAN RAFAEL, CA 94901-3242 |
| Owner Type | Individual |
| Vesting | Partnership |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Apr 14, 2000 · Amount on Record |
| Deed Sale | Apr 14, 2000 · Amount on Record |
| Prior Sale | May 2, 1994 · Amount on Record |
| Deed Document Number | 200075260 |
| Prior Transfer Date | Apr 12, 1994 |
| Prior Transfer Doc | 0000120896 |
| Record Updated | Oct 29, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Walnut Creek City |
| Secondary School District | Acalanes Union High School District (09 - 12) |
| Elementary School District | Walnut Creek Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $7,577,000 (+14.73%) Land $871,300 Building $6,705,700 | |
| 2025 | $74,922.00 (-9.43%) | $6,604,000 (-10.59%) Land $759,400 Building $5,844,600 |
| 2023 | $82,719.00 (+1.98%) | $7,386,527 Land $849,441 Building $6,537,086 |
| 2022 | $81,116.00 |
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 AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on Record median of 12 individual policies |
| Community Rating System | Class 8 (10% premium discount) |
| Nearby Flood Policies | 71 units insured incl. 59 condo units |
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 | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond 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 158 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable · Fiber in parts of the area | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Astound Broadband, Etheric Networks, Sonic Telecom, T-Mobile, Verizon.
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