Sonoma County property record for 100 Mountain Ave, Sonoma, CA 95476
| Property Type | Duplex |
|---|---|
| Details | 2 bd · 1 ba · 930 sqft · built 1963 |
| Lot Size | 0.17 acres (7,400 sqft) |
| Owner | Individual Name on File |
| Last Sale | $249,000 (Mar 2000) |
| Tax Bill | $11,131 (2025) |
| Deeds & Mortgages | Sep 2025 Mortgage May 2022 Transfer + 2 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 056-321-010-000 |
| Primary APN | 056-321-010-000 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 2 Rooms |
| Units | 2 Units |
| Stories | 1 Story |
| Building Area | 930 sqft Living Area |
| 1st Floor Area | 930 sqft |
| Year Built | Built 1963 |
|---|---|
| Effective Year Built | Effective 1980 |
| Architectural Style | L-Shape |
| Exterior Material | Wood Siding |
| Construction Type | Wood |
| Roof Material | Composition Shingle |
| Lot Area | 7,400 sqft (0.17 acres) |
| Garage Type | Carport |
| Garage Area | 1,265 sqft |
| Carport | Carport |
| Carport Area | 1,265 sqft |
| Parking Spaces | 5 Parking Spaces |
| Cooling System | None |
|---|---|
| Heating System | Central |
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Old Parcel Number | 056-321-010 |
|---|---|
| Street Address | 100 MOUNTAIN AVE |
| City | SONOMA |
| State | CA |
| Zip | 95476-3439 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | R15UA |
| Legal Description | MAP 23 PG 21 BLK 4 PART OF LOT 1 |
| Legal Subdivision | SAN MATEO |
| Legal Block | 2 |
| Legal Lot Number | 1 |
| Jurisdiction | SONOMA CA |
| Township / Civil Division | SONOMA |
| Census Block Group | 2 |
| Census Block | 2003 |
| Census Tract | 150306 |
100 Mountain Ave, a duplex, is owned by an individual who bought it in March 2000.
Source: Sonoma County records, as of September 1, 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 | Individual Name on File |
|---|---|
| Mailing Address | 4816 TILDEN AVE, SHERMAN OAKS, CA 91423-1718 |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Sep 2, 2025 | Deed of Trust, Mortgage · Conventional Mortgage ROCKET MORTGAGE LLC |
| May 9, 2022 | Intrafamily Transfer, Transfer |
| Feb 26, 2019 | Quit Claim Deed, Transfer · Conventional Mortgage QUICKEN LNS |
| Feb 26, 2019 | Quit Claim Deed, Transfer AMROCK INC |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Mar 17, 2000 · Amount on File |
| Deed Sale | Mar 17, 2000 · Amount on File |
| Deed Document Number | 200025405 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SONOMA CA |
| Property Address | 100 MOUNTAIN AVE, SONOMA, CA 95476-3439 |
| Transaction Type | Mortgage |
| Record Updated | Oct 2, 2025 |
| Title Company | UNKNOWN, ROCKET CLOSE LLC RESIDENTIAL |
| Name | Verified Name |
|---|---|
| Address | 4816 TILDEN AVE, SHERMAN OAKS, CA 91423-1718 |
| Document Number | 0000041819 |
|---|---|
| Date | Sep 2, 2025 |
| Instrument | 2025041819 |
| Name | ROCKET MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Address | DETROIT, MI 48226 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Sep 1, 2055 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | May 9, 2022 |
| Property Address | 100 MOUNTAIN AVE, SONOMA, CA 95476-3439 |
| Document Number | 0000033169 |
| Map Reference | MB 23 PG 21 |
| Instrument Date | Apr 28, 2022 |
| Instrument | 2022033169 |
| Transaction Type | Transfer |
| Record Updated | May 24, 2022 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 4816 TILDEN AVE, SHERMAN OAKS, CA 91423-1718 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Feb 26, 2019 |
| Property Address | 100 MOUNTAIN AVE, SONOMA, CA 95476-3439 |
| Document Number | 0000014222 |
| Instrument Date | Feb 22, 2019 |
| Instrument | 14222 |
| Transaction Type | Transfer |
| Record Updated | Mar 13, 2019 |
| Title Company | AMROCK INC |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 127 MAYAN DR SONOMA CA 954769304, SONOMA, CA 95476-9304 |
| Document Number | 14221 |
|---|---|
| Date | Feb 26, 2019 |
| Instrument | 14221 |
| Name | QUICKEN LNS |
|---|---|
| Type | Funding / Finance Company |
| Address | DETROIT, MI 48226-1906 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Feb 25, 2049 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | SONOMA CA |
| Recording Date | Feb 26, 2019 |
| Property Address | 100 MOUNTAIN AVE, SONOMA, CA 95476-3439 |
| Document Number | 0000014220 |
| Instrument Date | Feb 22, 2019 |
| Instrument | 14220 |
| Transaction Type | Transfer |
| Record Updated | Mar 13, 2019 |
| Title Company | AMROCK INC |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 127 MAYAN DR SONOMA CA 954769304, SONOMA, CA 95476-9304 |
The 2025 property tax bill for 100 Mountain Ave was $11,131.
Source: Sonoma County assessment roll, as of September 1, 2026
| Type | Name |
|---|---|
| State | California |
| County | Sonoma County |
| Unified School District | Sonoma Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $719,815 (+2%) Land $340,965 Building $378,850 | |
| 2025 | $11,131.00 | $705,702 Land $334,280 Building $371,422 |
| 2023 | $10,579.00 (+60.7%) | $367,839 Land $162,497 Building $205,342 |
| 2022 | $6,583.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 100 Mountain Ave in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective February 15, 2026 · 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 |
| Community Rating System | Class 10 (0% premium discount) |
| Nearby Flood Policies | 2 in force |
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.
Wildfire risk around 100 Mountain Ave is low, with a 0.04% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 66% of the US · lower than 80% of California |
|---|---|
| Wildfire Likelihood | 0.04% 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 | VALLEY OF THE MOON WATER DISTRICT serves 23,140 people · EPA ID CA4910013 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Sep 2022 |
| Lead | Under 1 ppb (2024–2026) 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.
Source: FCC Broadband Data Collection, based on 444 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
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