823 12th St, Boulder, CO 80302 Property Records

Boulder County property record for 823 12th St, Boulder, CO 80302 · Last verified June 2026

Property Highlights

Property Type	Residential > Single Family > Home
Bedrooms	5 Beds
Bathrooms	3.5 Baths
Year Built	Built 1985
Square Footage	4,509 sqft Living Area
Lot Size	11,069 sqft (0.254 acres)
Occupancy	Owner Occupied
Last Sale	$285,000 (1991)
Tax Bill	$18,039.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`1463-31-3-38-001`
Alternative APNs	`R0001165` `0001165`

Interior

Bedrooms	5 Beds
Full Baths	3.5 Baths
Partial Baths	2 Partial Baths
Total Rooms	15 Rooms
Building Area	4,509 sqft Living Area
Gross Area	5,184 sqft Gross Area
1st Floor	1,434 sqft 1st Floor
Upper Floors	1,875 sqft Upper Floors
Basement Area	1,434 sqft Basement
Finished Basement	1,200 sqft Finished
Unfinished Basement	234 sqft Unfinished
Stories	2 Stories
Interior Structure	Plaster Interior Structure

Exterior

Year Built	Built 1929
Effective Year Built	Effective 1985
Exterior Material	Combination Exterior
Construction Type	Masonry/Concrete Masonry Units (CMUs) Construction
Roof Material	Tile Roof
Lot Area	11,069 sqft (0.254 acres)
Parking Spaces	2 Parking Spaces
Garage Type	Attached Garage
Garage Area	441 sqft Garage

Exterior Amenities

Deck Area	210 sqft Deck
Patio Area	1,353 sqft Patio
Porch	Porch
Porch Area	456 sqft Porch

Utilities and HVAC

Heating System	Hot Water Heating

Location & Zoning

Account Number	R0001165
Street Address	823 12TH ST
City	BOULDER
State	CO
Zip	80302-7520
Property Usage	Residential Property Usage
Type	Residential > Single Family > Home
Legal Description	LOT 1 CASCADE SUB SPLIT SEE ID 106189-106190
Legal Range	70
Legal Township	1N
Legal Section	31
Legal Subdivision	CASCADE SUB - BO
Legal Block	3
Legal Lot Number	1
Jurisdiction	BOULDER CO
Minor Civil Division	BOULDER
Census Blockgroup	3
Census Block	3003
Census Tract	12401

Owner

Source: Boulder County records · APN 1463-31-3-38-001

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	Individual Owner on File
Mailing Address	823 12TH ST, BOULDER, CO 80302-7520
Occupancy	Owner Occupied
Owner Type	Owner is an Individual, Couple or Unincorporated Entity

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Known Transactions	Last Sale Amount on Jan 14, 1991 Deed Sale Price on Jan 14, 1991 Prior Sale Amount on Jul 10, 1989
Deed Doc Number	19911083344
Last Transfer Date	Aug 24, 2005
Transfer Doc	0002722891
Record Refreshed	Sep 20, 2026

May 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	823 12TH ST, BOULDER, CO 80302-7520
Transaction Type	Mortgage
Record Updated	May 26, 2023

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0004007576
Date	May 17, 2023
Instrument	4007576

Lender

Name	ENT CU
Type	Credit Union
Address	COLORADO SPRINGS, CO 80921

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	240 Months
Due	May 28, 2043

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly (Revolving credit lines are monthly unless stated otherwise).

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 and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$204,918 (+8.8%) Land $79,778 Building $125,140	$3,013,500 (-) Land $1,173,200 Building $1,840,300
2025	$18,039.00 (+10.82%)	$188,344 (-2%) Land $73,325 Building $115,019	$3,013,500 (+5.06%) Land $1,173,200 Building $1,840,300
2023	$16,278.00 (-2.18%)	$192,183 (+7.25%) Land $74,712 Building $117,471	$2,868,400 (+11.25%) Land $1,115,100 Building $1,753,300
2022	$16,640.00	$179,192 Land $61,209 Building $117,983	$2,578,300 Land $880,700 Building $1,697,600