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4684 Macarthur Ln, Boulder, CO 80303 Property Records

Boulder County property record for 4684 Macarthur Ln, Boulder, CO 80303

Property Summary

Property TypeSingle Family Home
Details3 bd · 2.5 ba · 2,240 sqft · built 1978
Lot Size0.031 acres (1,346 sqft)
Owner2 Individual Names on Record
Last Sale$294,900 (May 2001)
Tax Bill$3,408 (2025)
Deeds & MortgagesApr 2026 Line of Credit
Flood ZoneZone X (moderate risk)
APN1463-33-2-12-004

Property Details

APN / Parcel Number

Primary APN1463-33-2-12-004
Alternative APNs
  • R0077969
  • 0077969

Interior

Bedrooms3 Beds
Full Baths2.5 Baths
Half Baths2 Half Baths
Total Rooms6 Rooms
Building Area2,240 sqft Living Area
Gross Area2,796 sqft
1st Floor Area974 sqft
Upper Floors Area866 sqft
Basement Area400 sqft
Finished Basement400 sqft
Interior WallsWallboard/Drywall

Exterior

Year BuiltBuilt 1978
Effective Year BuiltEffective 1978
Architectural StyleTownhouse
Exterior MaterialWood Shingle
Construction TypeFrame
Lot Area1,346 sqft (0.031 acres)
Garage TypeAttached
Garage Area556 sqft
Parking Spaces2 Parking Spaces
Deck Area123 sqft

Utilities, Heating & Cooling

Heating FuelElectric

Location & Zoning

Account NumberR0077969
Street Address4684 MACARTHUR LN
CityBOULDER
StateCO
Zip80303-1160
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionLOT 4 MACARTHUR PARK
Legal Range70
Legal Township1N
Legal Section33
Legal SubdivisionMACARTHUR PARK - BO
Legal Block3
Legal Lot Number4
JurisdictionBOULDER CO
Township / Civil DivisionBOULDER
Census Block Group3
Census Block3003
Census Tract12603

Owner

Source: Boulder County records, as of September 18, 2026

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

Owner of Record2 Individual Names on Record
Mailing Address4684 MACARTHUR LN, BOULDER, CO 80303-1160
OccupancyOwner Occupied
Owner TypeIndividual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleMay 1, 2001 · Amount on Record
Deed SaleMay 1, 2001 · Amount on Record
Prior SaleJun 19, 1992 · Amount on Record
Deed Document Number20012143634
Record UpdatedOct 29, 2026

April 2026: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionBOULDER CO
Recording DateApr 6, 2026
Property Address4684 MACARTHUR LN, BOULDER, CO 80303-1160
Document Number0004126606
Instrument DateApr 1, 2026
Instrument20264126606
Transaction TypeMortgage
Record UpdatedJul 12, 2026
Title CompanyNONE LISTED ON DOCUMENT

Transferred To (Grantee/Buyer)

NameVerified Name
Address4684 MACARTHUR LN, BOULDER, CO 80303-1160

Mortgage

Document Number0004126606,
DateApr 6, 2026
Instrument20264126606
Lender
NameENTRUST FEDERAL CREDIT UNION
Agreement
TypeLine of Credit
AmountAmount Recorded
Term360 Months
DueApr 25, 2056
Interest
Rate6%
Max Rate-1%

Tax Assessment & Valuation

Source: Boulder County assessment roll, as of September 18, 2026

Property Jurisdictions

TypeName
StateColorado
CountyBoulder County
MunicipalityBoulder City
Unified School DistrictBoulder Valley School District RE-2 (PK - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2026$41,126 (-2.08%) Land $11,111 Building $30,015$672,000 (-) Land $230,600 Building $441,400
2025$3,408.00 (+29.48%)$42,001 (+4.11%) Land $14,413 Building $27,588$672,000 (+11.61%) Land $230,600 Building $441,400
2024$2,632.00 (+1.78%)
2023$2,586.00 (+7.66%)$40,341 (+22.92%) Land $17,092 Building $23,249$602,100 (+27.51%) Land $255,100 Building $347,000
2022$2,402.00$32,818 Land $12,809 Building $20,009$472,200 Land $184,300 Building $287,900

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

Source: FEMA National Flood Hazard Layer, effective October 14, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood ZoneZone X
moderate risk
500-Year FloodplainYes
0.2% annual chance
Nearest Special Flood Hazard AreaZone AO, within 100 ft
Flood Insurance RequirementNot required
lenders may require it
Flood Insurance CostPremium on Record
median of 31 policies
Community Rating SystemClass 5 (25% premium discount)
Nearby Flood Policies31 in force
Nearby Flood Claims7 (2000–2013)
Claims Outside the SFHA5 of 7
Most Recent ClaimSep 2013 · Severe Storms, Flooding, Landslides, And Mudslides
Claims by Event
  • Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 6 claims

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

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

Wildfire RiskNot rated
no burnable land 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 SystemCITY OF BOULDER
serves 166,080 people · EPA ID CO0107152
Water SourceSurface water
Last State InspectionSep 2024
Lead2 ppb (2023–2025)
action level 15 ppb

Violations Reported to EPA

Water QualityHaloacetic acids
resolved · Jul 2017
Treatment and ProcedureNone
last 10 years
Monitoring and Reporting1
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 103 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Ayva Networks
Fixed Wireless		2,500 / 2,500
Xfinity
Cable · Fiber in parts of the area		2,000 / 250
Verizon
Fixed Wireless		300 / 20
LiveWireNet
Fixed Wireless		250 / 100
AT&T
Fixed Wireless		100 / 20

May also be available: CenturyLink.

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