Tuolumne County property record for 10850 Mountain Brow Rd, Sonora, CA 95370
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 3,377 sqft · built 2002 |
| Lot Size | 81.4 acres (3,547,526 sqft) |
| Owner | Company Name on File |
| Last Sale | $1,072,500 (Sep 2020) |
| Tax Bill | $11,069 (2025) |
| Deeds & Mortgages | Feb 2022 Line of Credit Sep 2020 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 033-100-002-000 |
| Primary APN | 033-100-002-000 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 7 Rooms |
| Units | 2 Units |
| Stories | 1 Story |
| Building Area | 3,377 sqft Living Area |
| 1st Floor Area | 3,377 sqft |
| Year Built | Built 2002 |
|---|---|
| Effective Year Built | Effective 2002 |
| Architectural Style | Modern |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Type | Gable |
| Roof Material | Composition Shingle |
| Lot Area | 3,547,526 sqft |
| Garage Type | Detached |
| Garage Area | 1,120 sqft |
| Parking Spaces | 4 Parking Spaces |
| Pool Type | Pool with Hot Tub/Spa |
| Total Buildings | 2 Buildings |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Sewer | Septic |
| Old Parcel Number | 033-100-002 |
|---|---|
| Street Address | 10850 MOUNTAIN BROW RD |
| City | SONORA |
| State | CA |
| Zip | 95370-9419 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | AE-37,AP |
| Legal Description | POR SW1/4 SEC 23 T2N R14E 81.4379AC |
| Legal Range | 14E |
| Legal Township | 02N |
| Legal Section | 23 |
| Legal Subdivision | SHAWS FLAT AREA |
| Jurisdiction | TUOLUMNE CA |
| Township / Civil Division | SONORA |
| Census Block Group | 2 |
| Census Block | 2000 |
| Census Tract | 5102 |
10850 Mountain Brow Rd is owned by a company that bought it in September 2020 and is owner-occupied.
Source: Tuolumne County records, as of July 7, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 10850 MOUNTAIN BROW RD, SONORA, CA 95370-9419 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Feb 2, 2022 | Deed of Trust, Mortgage · Line of Credit BANK OF STOCKTON |
| Sep 16, 2020 | Grant Deed, Transfer · Conventional Mortgage COSTELLO 1999 TRUST (RT) |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Sep 16, 2020 · Amount on File |
| Deed Sale | Sep 16, 2020 · Amount on File |
| Deed Document Number | 202011428 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | TUOLUMNE CA |
| Property Address | 10850 MOUNTAIN BROW RD, SONORA, CA 95370-9419 |
| Transaction Type | Mortgage |
| Record Updated | Jul 19, 2022 |
| Title Company | YOSEMITE TITLE COMPANY, YOSEMITE TITLE CO |
| Name | Verified Name |
|---|---|
| Address | 10850 MOUNTAIN BROW RD, SONORA, CA 95370-9419 |
| Document Number | 0000001446 |
|---|---|
| Date | Feb 2, 2022 |
| Instrument | 2022001446 |
| Name | BANK OF STOCKTON |
|---|---|
| Type | Bank |
| Address | STOCKTON, CA 95201 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | TUOLUMNE CA |
| Recording Date | Sep 16, 2020 |
| Property Address | 10850 MOUNTAIN BROW RD, SONORA, CA 95370-9419 |
| Document Number | 0000011428 |
| Instrument Date | Sep 11, 2020 |
| Instrument | 11428 |
| Transaction Type | Transfer |
| Record Updated | Sep 29, 2020 |
| Title Company | FIRST AMERICAN TITLE |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $1,180.00 |
| Amount Accuracy | Full Value |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 10850 MOUNTAIN BROW RD SONORA CA 953709419, SONORA, CA 95370-9419 |
| Document Number | 11429 |
|---|---|
| Date | Sep 16, 2020 |
| Instrument | 11429 |
| Name | COSTELLO 1999 TRUST (RT) |
|---|---|
| Address | 20845 SARATOGA RD, SONORA, CA 95370-5414 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
The 2025 property tax bill for 10850 Mountain Brow Rd was $11,069 with a homeowner's exemption.
Source: Tuolumne County assessment roll, as of July 7, 2026
| Type | Name |
|---|---|
| State | California |
| County | Tuolumne County |
| Elementary School District | Columbia Union Elementary School District (KG - 08) |
| Secondary School District | Sonora Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,055,256 (+1.96%) Land $100,228 Building $955,028 | |
| 2025 | $11,069.00 Homeowner's exemption Additional exemption filed | $1,034,960 Land $98,658 Building $936,302 |
| 2023 | $10,713.00 (+2.03%) Homeowner's exemption Additional exemption filed | $999,398 Land $99,452 Building $899,946 |
| 2022 | $10,500.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 10850 Mountain Brow Rd in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective October 21, 2022 · 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 | 3 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 10850 Mountain Brow Rd is high, ranking above 84% of the US, with a 0.8% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 84% of the US · above 64% of California |
|---|---|
| Wildfire Likelihood | 0.8% annual chance |
| Exposure | Direct burnable vegetation |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: FCC Broadband Data Collection, based on 84 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 |
| Cal.net Fixed Wireless | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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