Jefferson County property record for 420 W 1st Ave, Boulder, MT 59632
| Property Type | Mobile Home |
|---|---|
| Details | 2 bd · 1 ba · 1,104 sqft · built 1971 |
| Lot Size | 0.162 acres (7,057 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $923 (2026) |
| APN | R513266 |
| Primary APN | R513266 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Plumbing Fixtures | 5 Plumbing Fixtures |
| Total Rooms | 4 Rooms |
| Stories | 1 Story |
| Building Area | 1,104 sqft Living Area |
| 1st Floor Area | 840 sqft |
| Year Built | Built 1971 |
|---|---|
| Effective Year Built | Effective 1971 |
| Architectural Style | Mobile Home |
| Exterior Material | Aluminum/Vinyl |
| Construction Type | Frame |
| Roof Type | Flat |
| Roof Material | Metal |
| Lot Area | 7,057 sqft (0.162 acres) |
| Lot Dimensions | 131 ft deep x 54 ft wide |
| Garage Type | Detached |
| Garage Area | 384 sqft |
| Parking Spaces | 1 Parking Space |
| Porch | Slab |
| Porch Area | 140 sqft |
| Shed | 1 Shed |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 0000001156 |
|---|---|
| Street Address | 420 W 1ST AVE |
| City | BOULDER |
| State | MT |
| Zip | 59632-7782 |
| Property Category | Residential |
| Property Type | Residential > Prefabricated > Mobile Home |
| Legal Description | BOULDER ORIGINAL TOWNSITE, S29, T06 N, R04 W, BLOCK 032, LOT 11 - 12, 1971 CENTURY 14 X 60 |
| Legal Range | 04W |
| Legal Township | 06N |
| Legal Section | 29 |
| Legal Subdivision | BOULDER ORIGINAL TOWNSITE |
| Legal Block | 32 |
| Legal Lot Number | 11-12 |
| Jurisdiction | JEFFERSON MT |
| Township / Civil Division | BOULDER |
| Census Block Group | 3 |
| Census Block | 3038 |
| Census Tract | 962202 |
420 W 1st Ave, a mobile home, is owned by an individual who acquired it in December 2014.
Source: Jefferson County records, as of September 8, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | PO BOX 515, BOULDER, MT 59632-0515 |
| 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 | Name on Deed |
|---|---|
| Last Transfer Date | Dec 15, 2014 |
| Transfer Doc | 254023 |
| Record Updated | Oct 29, 2026 |
The 2026 property tax bill for 420 W 1st Ave was $923, up 56.4% from the year before.
Source: Jefferson County assessment roll, as of September 8, 2026
| 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) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $923.00 (+56.44%) | $69,601 (-) | |
| 2025 | $590.00 | $69,601 | $69,601 Land $36,031 Building $33,570 |
| 2023 | $717.00 | $62,796 | $62,796 Land $34,876 Building $27,920 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA has no flood map on file for 420 W 1st Ave; 2 flood insurance policies are in force nearby.
Source: FEMA National Flood Hazard Layer · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Not on file |
|---|---|
| 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 420 W 1st Ave is moderate, ranking above 40% of the US, with a 0.05% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 40% of the US · lower than 83% of Montana |
|---|---|
| Wildfire Likelihood | 0.05% 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 | CITY OF BOULDER serves 1,400 people · EPA ID MT0000158 |
|---|---|
| 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, 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.
Source: FCC Broadband Data Collection, based on 187 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
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