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405 Arapahoe Ave, Boulder, CO 80302 Property Records

Boulder County property record for 405 Arapahoe Ave, Boulder, CO 80302

Property Summary

Property TypeSingle Family Home
Details3 bd · 2.5 ba · 2,368 sqft · built 2002
Lot Size0.201 acres (8,758 sqft)
Owner2 Individual Names on File
Last Sale$1,000,000 (Jul 2018)
Tax Bill$14,331 (2025)
Flood ZoneZone X (minimal risk)
APN1461-36-1-01-017

Property Details

APN / Parcel Number

Primary APN1461-36-1-01-017
Alternative APNs
  • R0000467
  • 0000467

Interior

Bedrooms3 Beds
Full Baths2.5 Baths
Half Baths1 Half Bath
Total Rooms8 Rooms
Stories2 Stories
Building Area2,368 sqft Living Area
Gross Area3,750 sqft
1st Floor Area1,382 sqft
Upper Floors Area986 sqft
Basement Area1,382 sqft
Interior WallsWallboard/Drywall

Exterior

Year BuiltBuilt 2002
Effective Year BuiltEffective 2002
Architectural StyleA-Frame
Exterior MaterialCombination
Construction TypeFrame
Roof MaterialAsphalt
Lot Area8,758 sqft (0.201 acres)
Garage TypeDetached
Garage Area504 sqft
Parking Spaces2 Parking Spaces
PorchPorch
Porch Area104 sqft
Deck Area110 sqft

Utilities, Heating & Cooling

Heating SystemForced Air with A/C

Location & Zoning

Account NumberR0000467
Street Address405 ARAPAHOE AVE
CityBOULDER
StateCO
Zip80302-5824
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionW 25 FT LOT 5 & E 16 1/2 FT LOT 6 BLK A HIGHLAND LAWN & TR 1017 I & TR 416-A-2 36-1N-71
Legal Range71
Legal Township1N
Legal Section36
Legal SubdivisionHIGHLAND LAWN - BO
Legal Tract1017,416-A
Legal BlockA
Legal Lot Number5
JurisdictionBOULDER CO
Township / Civil DivisionBOULDER
Census Block Group2
Census Block2005
Census Tract12201

Owner

405 Arapahoe Ave is owned and occupied by two individuals who bought it in July 2018.

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

Owner of Record2 Individual Names on File
Mailing Address405 ARAPAHOE AVE, BOULDER, CO 80302-5824
OccupancyOwner Occupied
Owner TypeIndividual
VestingJoint Tenants

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 SaleJul 3, 2018 · Amount on File
Deed SaleJul 3, 2018 · Amount on File
Prior SaleSep 6, 2000 · Amount on File
Deed Document Number20183664006
Record UpdatedOct 29, 2026

Tax Assessment & Valuation

The 2025 property tax bill for 405 Arapahoe Ave was $14,331, up 12% from the year before.

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$158,773 (+0.68%) Land $85,551 Building $73,222$2,404,900 (-4.69%) Land $1,328,100 Building $1,076,800
2025$14,331.00 (+12%)$157,700 Land $83,006 Building $74,694$2,523,200 Land $1,328,100 Building $1,195,100
2024$12,796.00 (+1.77%)
2023$12,574.00 (+1.9%)$149,293 (+12.34%) Land $86,544 Building $62,749$2,228,248 (+16.53%) Land $1,291,700 Building $936,548
2022$12,340.00$132,891 Land $73,948 Building $58,943$1,912,100 Land $1,064,000 Building $848,100

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

FEMA maps place 405 Arapahoe Ave in Zone X, an area of minimal flood risk, within 100 ft of a high-risk flood zone.

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

FEMA Flood ZoneZone X
minimal risk
Nearest Special Flood Hazard AreaZone AE, within 100 ft
Flood Insurance RequirementNot required
lenders may require it
Flood Insurance CostPremium on File
median of 26 individual policies
Community Rating SystemClass 5 (25% premium discount)
Nearby Flood Policies41 units insured
incl. 15 condo units
Nearby Flood Claims19 (1983–2014)
Claims Outside the SFHA7 of 19
Most Recent ClaimJul 2014 · rainfall accumulation
Claims by Event
  • Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 14 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

Wildfire risk around 405 Arapahoe Ave is high, ranking above 82% of the US, with a 0.5% annual chance of wildfire.

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

Wildfire RiskHigh
above 82% of the US · above 85% of Colorado
Wildfire Likelihood0.5% annual chance
ExposureIndirect
within ember reach
Adjoins Burnable LandYes

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 331 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Ayva Networks
Fixed Wireless		2,500 / 2,500
Xfinity
Cable		2,000 / 250
LiveWireNet
Fixed Wireless		250 / 100
T-Mobile
Fixed Wireless		100 / 20

May also be available: CenturyLink, Verizon.

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