870 12th St, Boulder, CO 80302 Property Records

Boulder County property record for 870 12th St, Boulder, CO 80302 · Last verified June 2026

Property Highlights

Property Type	Residential > Single Family > Home
Bedrooms	4 Beds
Bathrooms	3.5 Baths
Year Built	Built 1985
Square Footage	3,360 sqft Living Area
Lot Size	9,169 sqft (0.211 acres)
Occupancy	Owner Occupied
Last Sale	$2,475,000 (2023)
Tax Bill	$14,347.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`1463-31-3-22-002`
Alternative APNs	`R0000705` `0000705`

Interior

Bedrooms	4 Beds
Full Baths	3.5 Baths
Partial Baths	1 Partial Baths
Total Rooms	11 Rooms
Building Area	3,360 sqft Living Area
Gross Area	3,608 sqft Gross Area
1st Floor	1,248 sqft 1st Floor
Upper Floors	1,112 sqft Upper Floors
Basement Area	1,248 sqft Basement
Finished Basement	1,000 sqft Finished
Unfinished Basement	248 sqft Unfinished
Stories	2 Stories
Interior Structure	Plaster Interior Structure

Exterior

Year Built	Built 1907
Effective Year Built	Effective 1985
Exterior Material	Combination Exterior
Construction Type	Masonry/Concrete Masonry Units (CMUs) Construction
Lot Area	9,169 sqft (0.211 acres)

Exterior Amenities

Deck Area	112 sqft Deck
Patio Area	712 sqft Patio
Porch	Porch
Porch Area	160 sqft Porch

Utilities and HVAC

Heating System	Forced Air with Air Conditioning Heating

Location & Zoning

Account Number	R0000705
Street Address	870 12TH ST
City	BOULDER
State	CO
Zip	80302-7521
Property Usage	Residential Property Usage
Type	Residential > Single Family > Home
Legal Description	LOTS 5-6-7 BLK 24 UNIVERSITY PLACE
Legal Range	70
Legal Township	1N
Legal Section	31
Legal Subdivision	UNIVERSITY PLACE - BO
Legal Block	24
Legal Lot Number	5
Jurisdiction	BOULDER CO
Minor Civil Division	BOULDER
Census Blockgroup	3
Census Block	3002
Census Tract	12401

Owner

Source: Boulder County records · APN 1463-31-3-22-002

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 Record	2 Individuals Owners
Mailing Address	870 12TH ST, BOULDER, CO 80302-7521
Occupancy	Owner Occupied
Owner Type	Owner is an Individual, Couple or Unincorporated Entity

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Known Transactions	Last Sale Amount on Mar 06, 2023 Deed Sale Price on Mar 06, 2023 Prior Sale Amount on Jun 05, 2014
Deed Doc Number	20233999054
Last Transfer Date	Jun 02, 2025
Transfer Doc	0004090363
Record Refreshed	Sep 20, 2026

March 2023: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Mar 06, 2023
Property Address	870 12TH ST, BOULDER, CO 80302-7521
Document Number	0003999054
Instrument Date	Mar 02, 2023
Instrument	3999054
Transaction Type	Transfer
Record Updated	Mar 13, 2023
Title Company	FIDELITY NATIONAL TITLE

Transaction

Amount	Amount Recorded
Loan-to-Value (LTV)	LTV on Record
Tax	$247.50
Amount Accuracy	Full Amount Stated
Additional	Arms Length Transaction

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	870 12TH ST, BOULDER, CO 80302-7521

Mortgage

Document Number	0003999055
Date	Mar 06, 2023
Instrument	3999055

Lender

Name	ROBERT AND CRISTINA MORRIS TRUST
Type	Non-Lending Institution

Agreement

Type	Commercial Mortgage
Amount	Amount Recorded
Term	230 Months
Due	Apr 30, 2042

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	Colorado
County	Boulder County
Municipality	Boulder City
Unified School District	Boulder 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.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$163,717 (+8.8%) Land $72,604 Building $91,113	$2,407,600 (-) Land $1,067,700 Building $1,339,900
2025	$14,347.00 (+4.71%)	$150,475 (-7.31%) Land $66,731 Building $83,744	$2,407,600 (-0.64%) Land $1,067,700 Building $1,339,900
2023	$13,701.00 (+11.74%)	$162,347 (+22.94%) Land $67,998 Building $94,349	$2,423,100 (+27.53%) Land $1,014,900 Building $1,408,200
2022	$12,262.00	$132,050 Land $55,711 Building $76,339	$1,900,000 Land $801,600 Building $1,098,400