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421 Mapleton Ave, Apt B, Boulder, CO 80304 Property Records

Boulder County property record for 421 Mapleton Ave, Apt B, Boulder, CO 80304 · Last verified June 2026

Property Highlights

Property TypeResidential > Condominium / Townhouse > Condominium
Bedrooms1 Beds
Bathrooms1 Baths
Year BuiltBuilt 1906
Square Footage616 sqft Living Area
Lot Size25 sqft (0.001 acres)
OccupancyOwner Occupied
Last Sale$337,500 (2019)
Tax Bill$3,304.00 (2025)

Property Details

APN / Parcel Number

Primary APN1461-25-4-85-008
Alternative APNs
  • R0140900
  • 0140900

Interior

Bedrooms1 Beds
Full Baths1 Baths
Total Rooms3 Rooms
Units3 Units
Building Area616 sqft Living Area
1st Floor616 sqft 1st Floor
Stories1 Stories
Interior StructureWallboard/Drywall Interior Structure

Exterior

Year BuiltBuilt 1906
Effective Year BuiltEffective 1906
Architectural StyleTownhouse Style
Exterior MaterialCombination Exterior
Construction TypeMasonry/Concrete Masonry Units (CMUs) Construction
Lot Area25 sqft (0.001 acres)
Deck Area216 sqft Deck

Utilities and HVAC

Heating SystemHot Water Heating

Location & Zoning

Account NumberR0140900
Street Address421 MAPLETON AVE, B
CityBOULDER
StateCO
Zip80304-3962
Property UsageResidential Property Usage
TypeResidential > Condominium / Townhouse > Condominium
Legal DescriptionUNIT 421B MAPLETON AVENUE CONDOMINIUMS & UND 9.07% INT IN GCE
Legal Range71
Legal Township1N
Legal Section25
Legal SubdivisionMAPLETON AVENUE CONDOMINIUMS - BO
Legal Block4
Legal Unit421B
JurisdictionBOULDER CO
Minor Civil DivisionBOULDER
Census Blockgroup4
Census Block4004
Census Tract12101

Owner

Source: Boulder County records · APN 1461-25-4-85-008

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 Address421 MAPLETON AVE, B, BOULDER, CO 80304-3962
OccupancyOwner Occupied
Owner TypeOwner is an Individual, Couple or Unincorporated Entity

Deeds, Mortgages & Sale History

DateDocument
Feb 16, 2017Deed of Trust, Mortgage · Line of Credit
ELEVATIONS CU
Dec 27, 2019Grant Deed, Transfer
STEWART TITLE
Dec 02, 2019Grant Deed, Transfer
STEWART TITLE
Jun 04, 2018Deed of Trust, Mortgage · Line of Credit
ELEVATIONS CU

Assessor's Deed Record

Deed Names2 Verified Names on Deed
Known Transactions
  • Last Sale Amount on Dec 27, 2019
  • Deed Sale Price on Dec 27, 2019
  • Prior Sale Amount on Dec 02, 2019
Deed Doc Number20193757382
Record RefreshedSep 20, 2026

February 2017: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionBOULDER CO
Property Address421 MAPLETON AVE APT B, B, BOULDER, CO 80304-3962
Transaction TypeMortgage
Record UpdatedApr 15, 2022

Transferred To (Grantee/Buyer)

NameVerified Name

Mortgage

Document Number0003575812
DateFeb 16, 2017
Instrument3575812
Lender
NameELEVATIONS CU
TypeCredit Union
AddressBOULDER, CO 80301
Agreement
TypeLine of Credit
AmountAmount Recorded
Interest
Rate TypeAdjustable Rate
Change FrequencyMonthly (Revolving credit lines are monthly unless stated otherwise).

December 2019: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionBOULDER CO
Recording DateDec 27, 2019
Property Address421 MAPLETON AVE APT B, B, BOULDER, CO 80304-3962
Document Number0003757382
Instrument DateDec 23, 2019
Instrument3757382
Transaction TypeTransfer
Record UpdatedJan 13, 2020
Title CompanySTEWART TITLE

Transaction

AmountAmount Recorded
Tax$33.75
Amount AccuracyConfirmed
Additional
  • Arms Length Transaction

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address1070 W CENTURY DR LOUISVILLE CO 800271655, LOUISVILLE, CO 80027-1655

December 2019: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionBOULDER CO
Recording DateDec 02, 2019
Property Address421 MAPLETON AVE APT B, B, BOULDER, CO 80304-3962
Document Number0003751868
Instrument DateNov 22, 2019
Instrument3751868
Transaction TypeTransfer
Record UpdatedDec 11, 2019
Title CompanySTEWART TITLE

Transaction

AmountAmount Recorded
Tax$33.75
Amount AccuracyConfirmed
Additional
  • Arms Length Transaction
  • Partial Interest

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address712 GRAND AVE GRAND ISLAND NE 688017479, GRAND ISLAND, NE 68801-7479

June 2018: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionBOULDER CO
Property Address421 MAPLETON AVE APT B, B, BOULDER, CO 80304-3962
Document Number0003659598
Instrument DateJun 04, 2018
Transaction TypeMortgage
Record UpdatedJun 18, 2018

Transferred To (Grantee/Buyer)

NameVerified Name
Address421 MAPLETON AVE #B BOULDER CO 803043962, B, BOULDER, CO 80304-3962

Mortgage

Document Number0003659598
DateJun 08, 2018
Instrument3659598
Lender
NameELEVATIONS CU
AddressBOULDER, CO 80301
Agreement
TypeLine of Credit
AmountAmount Recorded
Term240 Months
DueJun 07, 2038
Interest
Rate TypeAdjustable Rate

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$44,506 (+8.8%) Building $44,506$654,500 (-) Building $654,500
2025$3,304.00 (+15.4%)$40,906 (+11.02%) Building $40,906$654,500 (+19.01%) Building $654,500
2023$2,863.00 (-5.85%)$36,846 (+12.49%) Building $36,846$549,940 (+16.69%) Building $549,940
2022$3,041.00$32,755 Building $32,755$471,300 Building $471,300

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