820 12th St, Boulder, CO 80302 Property Records

Boulder County property record for 820 12th St, Boulder, CO 80302 · Last verified June 2026

Property Highlights

Property TypeResidential > Single Family > Home
Bedrooms2 Beds
Bathrooms1.75 Baths
Year BuiltBuilt 1983
Square Footage2,277 sqft Living Area
Lot Size9,136 sqft (0.21 acres)
GarageAttached, 312 sqft
Last Sale$1,590,000 (2025)
Tax Bill$8,683.00 (2025)

Property Details

APN / Parcel Number

Primary APN1463-31-3-22-007
Alternative APNs
  • R0003789
  • 0003789

Interior

Bedrooms2 Beds
Full Baths1.75 Baths
Partial Baths1 Partial Baths
Total Rooms5 Rooms
Building Area2,277 sqft Living Area
Gross Area2,589 sqft Gross Area
1st Floor1,419 sqft 1st Floor
Basement Area858 sqft Basement
Finished Basement858 sqft Finished
Stories1 Stories
Interior StructureWallboard/Drywall Interior Structure

Exterior

Year BuiltBuilt 1954
Effective Year BuiltEffective 1983
Architectural StyleRanch Style
Exterior MaterialBrick Veneer Exterior
Construction TypeMasonry/Concrete Masonry Units (CMUs) Construction
Lot Area9,136 sqft (0.21 acres)
Parking Spaces1 Parking Spaces
Garage TypeAttached Garage
Garage Area312 sqft Garage
Deck Area240 sqft Deck
Patio Area488 sqft Patio

Utilities and HVAC

Heating SystemForced Air with Air Conditioning Heating

Location & Zoning

Account NumberR0003789
Street Address820 12TH ST
CityBOULDER
StateCO
Zip80302-7521
Property UsageResidential Property Usage
TypeResidential > Single Family > Home
Legal DescriptionLOTS 19-21 BLK 24 UNIVERSITY PLACE
Legal Range70
Legal Township1N
Legal Section31
Legal SubdivisionUNIVERSITY PLACE - BO
Legal Block24
Legal Lot Number19
JurisdictionBOULDER CO
Minor Civil DivisionBOULDER
Census Blockgroup3
Census Block3002
Census Tract12401

Owner

Source: Boulder County records · APN 1463-31-3-22-007

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 RecordIndividual Owner on File
Mailing Address2210 VALLEJO ST, SAN FRANCISCO, CA 94123-4718
Owner TypeOwner is a Company

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed NamesVerified Name on Deed
Known Transactions
  • Last Sale Amount on Mar 03, 2025
  • Deed Sale Price on Mar 03, 2025
  • Prior Sale Amount on Aug 15, 1978
Deed Doc Number20254077952
Prior Transfer DateJan 03, 2025
Prior Transfer Doc0004072263
Record RefreshedSep 20, 2026

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$110,058 (+20.85%) Land $72,474 Building $37,584$1,618,500 (+11.08%) Land $1,065,800 Building $552,700
2025$8,683.00 (+11.61%)$91,069 (-7.93%) Land $66,613 Building $24,456$1,457,100 (-1.3%) Land $1,065,800 Building $391,300
2024$7,780.00 (+1.77%)
2023$7,645.00 (+11.1%)$98,912 (+22.04%) Land $67,871 Building $31,041$1,476,300 (+26.59%) Land $1,013,000 Building $463,300
2022$6,881.00$81,051 Land $55,614 Building $25,437$1,166,200 Land $800,200 Building $366,000

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