Marin County property record for 122 Cornelia Ave, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 2,516 sqft · built 1909 |
| Lot Size | 0.126 acres (5,500 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $2,175,000 (Jan 2009) |
| Tax Bill | $36,109 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 028-043-04 |
| Primary APN | 028-043-04 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Building Area | 2,516 sqft Living Area |
| Basement Area | 360 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1909 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | Contemporary |
| Lot Area | 5,500 sqft (0.126 acres) |
| Garage Area | 387 sqft |
| Parking Spaces | 1 Parking Space |
| Deck Area | 395 sqft |
| Patio Area | 395 sqft |
| Street Address | 122 CORNELIA AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-1808 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Subdivision | TAMALPAIS LAND & WATER CO MAP |
| Legal Block | 5 |
| Legal Lot Number | 14 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 4 |
| Census Block | 4005 |
| Census Tract | 127000 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Listed Area | Within Dipsea Trail, The listed 2010 · 1 contributing resources · NRIS 10000356 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
Source: Marin County records, as of July 13, 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 | 122 CORNELIA AVE, MILL VALLEY, CA 94941-1808 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jan 15, 2009 · Amount on Record |
| Deed Sale | Jan 15, 2009 · Amount on Record |
| Prior Sale | Aug 10, 2001 · Amount on Record |
| Deed Document Number | 20091497 |
| Prior Transfer Date | Jan 6, 2009 |
| Prior Transfer Doc | 0000001498 |
| Record Updated | Oct 29, 2026 |
Source: Marin County assessment roll, as of July 13, 2026
| Type | Name |
|---|---|
| State | California |
| County | Marin County |
| Municipality | Mill Valley City |
| Elementary School District | Mill Valley Elementary School District (KG - 08) |
| Secondary School District | Tamalpais Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $2,856,688 (+2%) Land $1,838,788 Building $1,017,900 | |
| 2025 | $36,109.00 (+4.17%) Homeowner's exemption | $2,800,682 (+4.04%) Land $1,802,738 Building $997,944 |
| 2023 | $34,664.00 (+3.27%) Homeowner's exemption | $2,691,954 Land $1,732,752 Building $959,202 |
| 2022 | $33,568.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective October 18, 2023 · 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 10 policies |
| Nearby Flood Policies | 10 in force |
| Nearby Flood Claims | 2 (2005–2007) |
| Claims Outside the SFHA | 1 of 2 |
| Most Recent Claim | May 2007 · other causes |
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 | 0.02% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | MARIN MUNICIPAL WATER DISTRICT serves 188,116 people · EPA ID CA2110002 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Aug 2023 |
| Lead | Under 1 ppb (2019–2021) 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 595 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: T-Mobile, Unwired.
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