642 Dearborn Ave, Helena, MT 59601 Property Records

Lewis And Clark County property record for 642 Dearborn Ave, Helena, MT 59601

Property Summary

Property Type	Single Family Home
Details	7 bd · 4.5 ba · 5,789 sqft · built 1886
Lot Size	1.1 acres (47,916 sqft)
Owner	2 Individual Names on File
Tax Bill	$8,678 (2025)
Deeds & Mortgages	Mar 2021 Sale
Flood Zone	Zone X (minimal risk)
APN	`R057286`

Property Details

APN / Parcel Number

Primary APN	`R057286`
Alternative APNs	`05-1887-25-4-79-03-0000` `0000005346`

Interior

Bedrooms	7 Beds
Full Baths	4.5 Baths
Half Baths	1 Half Bath
Plumbing Fixtures	17 Plumbing Fixtures
Total Rooms	9 Rooms
Stories	2 Stories
Building Area	5,789 sqft Living Area
1st Floor Area	2,374 sqft
2nd Floor Area	2,483 sqft
Attic	Attic
Attic Area	932 sqft
Basement Area	600 sqft
Finished Basement	600 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1886
Effective Year Built	Effective 1980
Architectural Style	Traditional
Exterior Material	Brick
Construction Type	Frame
Roof Type	Gable
Roof Material	Asphalt
Lot Area	47,916 sqft (1.1 acres)
Garage Type	Detached
Garage Area	968 sqft
Parking Spaces	4 Parking Spaces

Exterior Amenities

Porch	Enclosed Porch
Porch Area	329 sqft
Deck Area	207 sqft
Shed	1 Shed
Shed Area	360 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Account Number	0000005346
Street Address	642 DEARBORN AVE
City	HELENA
State	MT
Zip	59601-2700
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	STOREY, S25, T10 N, R04 W, BLOCK 21, LOT 1 - 3, ,1/2 OF CL ALLEY, BLK 28 LTS 1-3, 1/2 CL ALLEY
Legal Range	04W
Legal Township	10N
Legal Section	25
Legal Subdivision	STOREY
Legal Block	21
Legal Lot Number	1-3
Jurisdiction	LEWIS AND CLARK MT
Township / Civil Division	HELENA
Census Block Group	2
Census Block	2010
Census Tract	800

Owner

Source: Lewis And Clark County records · APN R057286

Assessment roll updated September 15, 2025 · Last verified August 2026

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
Mailing Address	642 DEARBORN AVE, HELENA, MT 59601-2700
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Et Al (and Others)

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Mar 22, 2021
Deed Sale	Mar 22, 2021
Deed Document Number	20213374920
Deed Book / Page	58 / 9029
Last Transfer Date	Jun 07, 2022
Transfer Doc	0003399377
Record Updated	Sep 20, 2026

March 2021: Deed of Distribution, Transfer

Document Type	Deed of Distribution
Jurisdiction	LEWIS AND CLARK MT
Recording Date	Mar 22, 2021
Property Address	642 DEARBORN AVE, HELENA, MT 59601-2700
Document Number	M58/9029
Book / Page	M58 / 9029
Instrument Date	Mar 16, 2021
Instrument	3374920
Transaction Type	Transfer
Record Updated	Aug 12, 2021

Transaction

Tax	$0.00
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants

Tax Assessment & Valuation

Source: Lewis And Clark County records · Assessment roll updated September 15, 2025 · Last verified August 2026

Property Jurisdictions

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)

Tax Bill & Assessment History

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	$8,678.00 (-24.2%)	$1,261,070 (+20.04%)	$1,261,070 (+20.04%) Land $262,910 Building $998,160
2023	$11,449.00	$1,050,500	$1,050,500 Land $199,910 Building $850,590

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of April 7, 2024 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Wildfire

Wildfire Risk	Low lower than 80% of the US · lower than 93% of Montana
Wildfire Likelihood	0.01% annual chance
Exposure	Indirect within ember reach

Values are read at the parcel center point; lenders make the official flood determination.

Historic Designation

Source: NPS National Register of Historic Places as of August 1, 2026 · Last verified October 2026

Historic District	Within the Helena Historic District listed 1972 · 75 contributing resources · NRIS 72000737

Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
Montana Internet Fixed Wireless	500 / 50
Verizon Fixed Wireless	300 / 20
AT&T Fixed Wireless	100 / 20

May also be available: TDS Telecom.

Based on FCC filings for 437 locations within half a mile of this property.

Drinking Water

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	HELENA WATER SYSTEM serves 32,091 people
Water Source	Surface water
Last State Inspection	Oct 2024
Lead	3 ppb (2022–2024) action level 15 ppb

Violations Reported to EPA

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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.