Marin County property record for 129 Sunnyside Ave, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2 ba · 1,020 sqft · built 1935 |
| Lot Size | 0.11 acres (4,800 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $10,185 (2025) |
| Deeds & Mortgages | Aug 2026 Sale Jun 2026 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 029-184-18 |
| Primary APN | 029-184-18 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Building Area | 1,020 sqft Living Area |
| Year Built | Built 1935 |
|---|---|
| Effective Year Built | Effective 1935 |
| Architectural Style | Contemporary |
| Lot Area | 4,800 sqft (0.11 acres) |
| Street Address | 129 SUNNYSIDE AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-2073 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 4 |
| Census Block | 4005 |
| Census Tract | 126100 |
Source: Marin County records, as of September 17, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 1922 VIRGINIA ST, 3, BERKELEY, CA 94709-2160 |
| Owner Type | Company |
| Vesting | Trust, Revocable Trust |
| Date | Document |
|---|---|
| Aug 28, 2026 | Grant Deed, Transfer NONE LISTED ON DOCUMENT |
| Jun 29, 2026 | Affidavit of Death of Trustee, Transfer |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Feb 10, 2026 |
| Transfer Doc | 0000003519 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | MARIN CA |
| Recording Date | Aug 28, 2026 |
| Property Address | 129 SUNNYSIDE AVE, MILL VALLEY, CA 94941-2073 |
| Document Number | 0000024897 |
| Instrument Date | Aug 6, 2026 |
| Instrument | 202624897 |
| Transaction Type | Transfer |
| Record Updated | Sep 9, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Document Type | Affidavit of Death of Trustee |
|---|---|
| Jurisdiction | MARIN CA |
| Recording Date | Jun 29, 2026 |
| Property Address | 129 SUNNYSIDE AVE, MILL VALLEY, CA 94941-2073 |
| Document Number | 0000018843 |
| Instrument Date | Jun 22, 2026 |
| Instrument | 202618843 |
| Transaction Type | Transfer |
| Record Updated | Aug 30, 2026 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Living Trust |
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 | $583,362 (+2%) Land $45,637 Building $537,725 | |
| 2025 | $10,185.00 (+3.69%) Homeowner's exemption | $571,923 (+4.04%) Land $44,742 Building $527,181 |
| 2023 | $9,823.00 (+2.93%) Homeowner's exemption | $549,718 Land $43,005 Building $506,713 |
| 2022 | $9,543.00 |
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 |
| Nearby Flood Policies | 6 in force |
| Nearby Flood Claims | 5 (1982–2009) |
| Claims Outside the SFHA | 4 of 5 |
| Most Recent Claim | Oct 2009 · 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 | 0.01% 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 762 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 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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