Lewis And Clark County property record for 100 Jefferson St, Helena, MT 59601
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 2,096 sqft · built 1890 |
| Lot Size | 0.234 acres (10,193 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $3,865 (2026) |
| Deeds & Mortgages | Dec 2019 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | R056180 |
| Primary APN | R056180 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Plumbing Fixtures | 11 Plumbing Fixtures |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 2,096 sqft Living Area |
| 1st Floor Area | 1,465 sqft |
| 2nd Floor Area | 522 sqft |
| Attic | Attic |
| Attic Area | 109 sqft |
| Basement Area | 1,066 sqft |
| Unfinished Basement | 1,066 sqft |
| Year Built | Built 1890 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | Historical |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Type | Mansard |
| Roof Material | Asphalt |
| Lot Area | 10,193 sqft (0.234 acres) |
| Terrain | Above Road/Slope |
| Garage Type | Detached |
| Garage Area | 396 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Slab |
| Porch Area | 155 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 0000004487 |
|---|---|
| Street Address | 100 JEFFERSON ST |
| City | HELENA |
| State | MT |
| Zip | 59601-6252 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | HELENA TOWNSITE 1869, S36, T10 N, R04 W, BLOCK 62, N2 OF E60' OF W40' OF 9,10,E2 OF 11,12 |
| Legal Range | 04W |
| Legal Township | 10N |
| Legal Section | 36 |
| Legal Subdivision | HELENA TOWNSITE 1869 |
| Legal Block | 62 |
| Jurisdiction | LEWIS AND CLARK MT |
| Township / Civil Division | HELENA |
| Census Block Group | 1 |
| Census Block | 1020 |
| Census Tract | 702 |
100 Jefferson St is owned and occupied by two individuals.
Source: Lewis And Clark County records, as of September 11, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 100 JEFFERSON ST, HELENA, MT 59601-6252 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | LEWIS AND CLARK MT |
| Property Address | 100 JEFFERSON ST, HELENA, MT 59601-6252 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | FIRST MONTANA LAND TITLE |
| Name | Verified Name |
|---|
| Document Number | M56/3707 |
|---|---|
| Date | Dec 2, 2019 |
| Book Page | M56/3707 |
| Instrument | 3347071 |
| Name | VALLEY BANK OF HELENA |
|---|---|
| Type | Bank |
| Address | HELENA, MT 59601 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Jan 1, 2050 |
The 2026 property tax bill for 100 Jefferson St was $3,865.
Source: Lewis And Clark County assessment roll, as of September 11, 2026
| Type | Name |
|---|---|
| State | Montana |
| County | Lewis And Clark County |
| Municipality | Helena City |
| Elementary School District | Helena Elementary School District (PK - 08) |
| Secondary School District | Helena High School District (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $3,865.00 | $613,200 | |
| 2025 | $613,200 Land $208,390 Building $404,810 | ||
| 2023 | $5,345.00 | $490,500 | $490,500 Land $166,470 Building $324,030 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 100 Jefferson St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective April 7, 2024
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Wildfire risk around 100 Jefferson St is moderate, ranking above 50% of the US, with a 0.08% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 50% of the US · lower than 74% of Montana |
|---|---|
| Wildfire Likelihood | 0.08% 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 | HELENA WATER SYSTEM serves 32,091 people · EPA ID MT0000241 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Oct 2024 |
| Lead | 3 ppb (2022–2024) action level 15 ppb |
| Water Quality | Haloacetic acids resolved · Jan 2023 |
|---|---|
| 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 135 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Spectrum Cable | 1,000 / 1,000 |
| Montana Internet Fixed Wireless | 500 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
| Starlink Satellite | 280 / 30 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: T-Mobile.
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