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521 Iris Ave, Boulder, CO 80304 Property Records

Boulder County property record for 521 Iris Ave, Boulder, CO 80304 · Last verified June 2026

Property Highlights

Property TypeResidential > Single Family > Home
Bedrooms2 Beds
Bathrooms1 Baths
Year BuiltBuilt 1990
Square Footage1,060 sqft Living Area
Lot Size7,198 sqft (0.165 acres)
OccupancyOwner Occupied
Last Sale$1,172,521 (2021)
Tax Bill$6,577.00 (2025)

Property Details

APN / Parcel Number

Primary APN1461-24-4-00-025
Alternative APNs
  • R0005749
  • 0005749

Interior

Bedrooms2 Beds
Full Baths1 Baths
Total Rooms4 Rooms
Building Area1,060 sqft Living Area
Gross Area1,280 sqft Gross Area
1st Floor1,060 sqft 1st Floor
Stories1 Stories
Interior StructurePlaster Interior Structure

Exterior

Year BuiltBuilt 1955
Effective Year BuiltEffective 1990
Architectural StyleRanch Style
Exterior MaterialWood Shingle Exterior
Construction TypeFrame Construction
Roof MaterialAsphalt Roof
Lot Area7,198 sqft (0.165 acres)
Parking Spaces1 Parking Spaces
Garage TypeAttached Garage
Garage Area220 sqft Garage
Deck Area396 sqft Deck

Utilities and HVAC

Heating SystemForced Air with Air Conditioning Heating

Location & Zoning

Account NumberR0005749
Street Address521 IRIS AVE
CityBOULDER
StateCO
Zip80304-1751
Property UsageResidential Property Usage
TypeResidential > Single Family > Home
Legal DescriptionTRACT 402-D LESS D-1 TO D-14 INC BO 24-1N-71 PER DEED 1665651 12/20/96 BCR
Legal Range71
Legal Township1N
Legal Section24
Legal SubdivisionTR, NBR 101-103,105,107,109,170
Legal Tract402-D
Legal Block2
JurisdictionBOULDER CO
Minor Civil DivisionBOULDER
Census Blockgroup2
Census Block2008
Census Tract12101

Owner

Source: Boulder County records · APN 1461-24-4-00-025

Assessment roll updated June 15, 2026 · Last verified June 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record2 Individuals Owners
Mailing Address521 IRIS AVE, BOULDER, CO 80304-1751
OccupancyOwner Occupied
Owner TypeOwner is an Individual, Couple or Unincorporated Entity
VestingJoint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Verified Names on Deed
Known Transactions
  • Last Sale Amount on Jun 02, 2021
  • Deed Sale Price on Jun 02, 2021
  • Prior Sale Amount on Dec 20, 1996
Deed Doc Number20213889692
Transfer Doc0001665651
Record RefreshedSep 20, 2026

June 2021: Personal Representative Deed, Transfer

Document TypePersonal Representative Deed
JurisdictionBOULDER CO
Recording DateJun 02, 2021
Property Address521 IRIS AVE, BOULDER, CO 80304-1751
Document Number0003889692
Instrument DateMay 26, 2021
Instrument3889692
Transaction TypeTransfer
Record UpdatedJun 15, 2021

Transaction

AmountAmount Recorded
DownpaymentDownpayment on File
Loan-to-Value (LTV)LTV on Record
Tax$117.25
Amount AccuracyFull Amount Stated
Additional
  • Arms Length Transaction

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipJoint Tenants
Address521 IRIS AVE, BOULDER, CO 80304-1751

Mortgage

Document Number0003889693
DateJun 02, 2021
Instrument3889693
Lender
NameFIRSTBANK
TypeBank
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term360 Months
DueJun 01, 2051

Tax Assessment & Valuation

Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified June 2026

Property Jurisdictions

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

Tax Bill & Assessment History

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.

YearTax BillAssessed ValueAssessed Market Value
2026$90,331 (+30.94%) Land $81,298 Building $9,033$1,328,400 (+20.35%) Land $1,195,560 Building $132,840
2025$6,577.00 (+0.98%)$68,988 (-11.32%) Land $62,089 Building $6,899$1,103,800 (-4.93%) Land $993,420 Building $110,380
2024$6,513.00 (+1.78%)
2023$6,399.00 (+18.94%)$77,793 (+34.26%) Land $70,014 Building $7,779$1,161,100 (+39.27%) Land $1,044,990 Building $116,110
2022$5,380.00$57,942 Land $52,148 Building $5,794$833,700 Land $750,330 Building $83,370

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