1. Home
  2. Montana
  3. Lewis and Clark County
  4. Helena
  5. Dearborn Ave

645 Dearborn Ave, Helena, MT 59601 Property Records

Lewis And Clark County property record for 645 Dearborn Ave, Helena, MT 59601

Property Summary

Property TypeSingle Family Home
Details3 bd · 3 ba · 1,752 sqft · built 1890
Lot Size0.172 acres (7,492 sqft)
Owner2 Individual Names on File
Last Sale$430,000 (Oct 2019)
Tax Bill$4,033 (2026)
Deeds & MortgagesOct 2019 Mortgage
Flood ZoneZone X (minimal risk)
APNR054563

Property Details

APN / Parcel Number

Primary APNR054563
Alternative APNs
  • 05-1887-25-4-80-03-0000
  • 0000003207

Interior

Bedrooms3 Beds
Full Baths3 Baths
Plumbing Fixtures10 Plumbing Fixtures
Total Rooms8 Rooms
Stories1 Story
Building Area1,752 sqft Living Area
1st Floor Area1,140 sqft
Basement Area660 sqft
Finished Basement660 sqft
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1890
Effective Year BuiltEffective 2005
Architectural StyleHistorical
Exterior MaterialBrick
Construction TypeMasonry / Concrete Block
Roof TypeHip
Roof MaterialAsphalt
Lot Area7,492 sqft (0.172 acres)
View / LotMajor Street/Thoroughfare
Garage TypeDetached
Garage Area480 sqft
Parking Spaces2 Parking Spaces
PorchSlab
Porch Area80 sqft
Deck Area120 sqft

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemCentral
Heating FuelGas
SewerMunicipal
Water SourceCommercial

Location & Zoning

Account Number0000003207
Street Address645 DEARBORN AVE
CityHELENA
StateMT
Zip59601-2766
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionSTOREY, S25, T10 N, R04 W, BLOCK 14, LOT 2
Legal Range04W
Legal Township10N
Legal Section25
Legal SubdivisionSTOREY
Legal Block14
Legal Lot Number2
JurisdictionLEWIS AND CLARK MT
Township / Civil DivisionHELENA
Census Block Group2
Census Block2011
Census Tract800

Historic Designation

Source: NPS National Register of Historic Places, as of August 1, 2026

Historic DistrictWithin 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.

Owner

645 Dearborn Ave is owned and occupied by two individuals who bought it in October 2019.

Source: Lewis And Clark County records, as of September 11, 2026

Owner of Record2 Individual Names on File
Mailing Address645 DEARBORN AVE, HELENA, MT 59601-2766
OccupancyOwner Occupied
Owner TypeIndividual

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleOct 25, 2019 · Amount on File
Deed SaleOct 25, 2019 · Amount on File
Deed Document Number20193345362
Deed Book / Page56 / 2126
Record UpdatedOct 29, 2026

October 2019: Warranty Deed, Transfer

Document TypeWarranty Deed
JurisdictionLEWIS AND CLARK MT
Recording DateOct 25, 2019
Property Address645 DEARBORN AVE, HELENA, MT 59601-2766
Document NumberM56/2126
Book / PageM56 / 2126
Instrument DateOct 24, 2019
Instrument3345362
Transaction TypeTransfer
Record UpdatedAug 12, 2021
Title CompanyFIRST MONTANA LAND TITLE COMPANY, FIRST MONTANA LAND TITLE CO

Transaction

Tax$0.00
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipJoint Tenants
Address645 DEARBORN AVE, HELENA, MT 59601-2766

Mortgage

Document Number3345363
DateOct 25, 2019
Instrument3345363
Lender
NameOPPORTUNITY BANK OF MT
TypeBank
Agreement
TypeConventional Mortgage
AmountAmount on Record
Term361 Months
DueNov 1, 2049

Tax Assessment & Valuation

The 2026 property tax bill for 645 Dearborn Ave was $4,033.

Source: Lewis And Clark County assessment roll, as of September 11, 2026

Property Jurisdictions

TypeName
StateMontana
CountyLewis And Clark County
MunicipalityHelena City
Elementary School DistrictHelena Elementary School District (PK - 08)
Secondary School DistrictHelena High School District (09 - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2026$4,033.00$632,000
2025$632,000 Land $182,875 Building $449,125
2023$6,617.00$607,200$607,200 Land $133,125 Building $474,075

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

FEMA maps place 645 Dearborn Ave in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective April 7, 2024

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it

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

Wildfire

Wildfire risk around 645 Dearborn Ave is low, with a 0.01% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire RiskLow
lower than 80% of the US · lower than 93% of Montana
Wildfire Likelihood0.01% annual chance
ExposureIndirect
within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water SystemHELENA WATER SYSTEM
serves 32,091 people · EPA ID MT0000241
Water SourceSurface water
Last State InspectionOct 2024
Lead3 ppb (2022–2024)
action level 15 ppb

Violations Reported to EPA

Water QualityHaloacetic acids
resolved · Jan 2023
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
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.

Internet Providers

Source: FCC Broadband Data Collection, based on 437 locations within half a mile, as of December 31, 2025

ProviderMax 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.

Nearby Properties on Dearborn Ave

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures