Jefferson County property record for 100 N Jefferson St, Boulder, MT 59632
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,356 sqft · built 1934 |
| Lot Size | 0.551 acres (24,002 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $2,117 (2025) |
| APN | R513327 |
| Primary APN | R513327 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Half Baths | 1 Half Bath |
| Plumbing Fixtures | 7 Plumbing Fixtures |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,356 sqft Living Area |
| 1st Floor Area | 875 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1934 |
|---|---|
| Effective Year Built | Effective 1950 |
| Architectural Style | Historical |
| Exterior Material | Wood |
| Construction Type | Frame |
| Foundation Type | Concrete |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 24,002 sqft (0.551 acres) |
| Garage Type | Detached |
| Parking Spaces | 3 Parking Spaces |
| Porch | Enclosed Porch |
| Porch Area | 152 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 0000001205 |
|---|---|
| Street Address | 100 N JEFFERSON ST |
| City | BOULDER |
| State | MT |
| Zip | 59632-7731 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | ELDER AND PARSON ADD (BOULDER), S28, T06 N, R04 W, BLOCK 41, LOT 1 - 4, ACRES 0.551 |
| Legal Subdivision | ELDER AND PARSON ADD (BOULDER) |
| Legal Block | 41 |
| Legal Lot Number | 1-4 |
| Jurisdiction | JEFFERSON MT |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3008 |
| Census Tract | 962202 |
Source: Jefferson County records · APN R513327
Assessment roll updated December 31, 2024 · Last verified November 2025
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Co-owner | Verified Secondary Owner |
| Mailing Address | 1148 SAMPSON ST, BUTTE, MT 59701-3402 |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Record Updated | Jun 08, 2026 |
Source: Jefferson County records · Assessment roll updated December 31, 2024 · Last verified November 2025
| Type | Name |
|---|---|
| State | Montana |
| County | Jefferson County |
| Municipality | Boulder City |
| Elementary School District | Boulder Elementary School District (PK - 08) |
| Secondary School District | Jefferson High School District (09 - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $2,117.00 (-20.95%) | $356,900 (+22.52%) | $356,900 (+22.52%) Land $49,501 Building $307,399 |
| 2023 | $2,678.00 | $291,300 | $291,300 Land $61,370 Building $229,930 |
Source: FEMA National Flood Hazard Layer · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Not on file |
|---|---|
| Nearby Flood Policies | 2 in force |
| Wildfire Risk | Moderate above 43% of the US · lower than 80% of Montana |
|---|---|
| Wildfire Likelihood | 0.06% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| Montana Internet Fixed Wireless · Fiber in parts of the area | 500 / 50 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
Based on FCC filings for 186 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | CITY OF BOULDER serves 1,400 people |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Oct 2025 |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | Failure to filter resolved · Jul 2022 |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 7 last 3 years |
Results are for the whole water system as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The service area is an EPA estimate; the actual supplier may differ. The full violation and enforcement history is in the system's EPA record.
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