143 E Saint Clair Ave, Longmont, CO 80504 Property Records

Boulder County property record for 143 E Saint Clair Ave, Longmont, CO 80504 · Last verified June 2026

Property Highlights

Property Type	Residential > Multi-Unit > Multi-Family Dwellings
Bedrooms	4 Beds
Bathrooms	2.75 Baths
Year Built	Built 1977
Square Footage	2,456 sqft Living Area
Lot Size	5,885 sqft (0.135 acres)
Occupancy	Owner Occupied
Last Sale	$90,000 (1995)
Tax Bill	$3,341.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`1315-02-2-21-019`
Alternative APNs	`R0075600` `0075600`

Interior

Bedrooms	4 Beds
Full Baths	2.75 Baths
Partial Baths	1 Partial Baths
Total Rooms	8 Rooms
Units	2 Units
Building Area	2,456 sqft Living Area
Gross Area	4,352 sqft Gross Area
1st Floor	1,792 sqft 1st Floor
Basement Area	1,792 sqft Basement
Finished Basement	664 sqft Finished
Unfinished Basement	1,128 sqft Unfinished
Stories	1 Stories
Interior Structure	Wallboard/Drywall Interior Structure

Exterior

Year Built	Built 1977
Effective Year Built	Effective 1977
Architectural Style	Ranch Style
Exterior Material	Brick Veneer Exterior
Construction Type	Masonry/Concrete Masonry Units (CMUs) Construction
Roof Material	Asphalt Roof
Lot Area	5,885 sqft (0.135 acres)
Garage Type	Attached Garage
Garage Area	768 sqft Garage
Deck Area	100 sqft Deck

Utilities and HVAC

Heating System	Forced Air with Air Conditioning Heating

Location & Zoning

Account Number	R0075600
Street Address	143 E SAINT CLAIR AVE
City	LONGMONT
State	CO
Zip	80504-5117
Property Usage	Residential Property Usage
Type	Residential > Multi-Unit > Multi-Family Dwellings
Legal Description	LOTS 3 & 4 BLK 5 KENSINGTON PLACE
Legal Range	69
Legal Township	2N
Legal Section	02
Legal Subdivision	KENSINGTON PLACE - LG
Legal Block	5
Legal Lot Number	3
Jurisdiction	BOULDER CO
Minor Civil Division	LONGMONT
Census Blockgroup	1
Census Block	1011
Census Tract	13401

Owner

Source: Boulder County records · APN 1315-02-2-21-019

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	143 E SAINT CLAIR AVE, LONGMONT, CO 80504-5117
Occupancy	Owner Occupied
Owner Type	Owner is an Individual, Couple or Unincorporated Entity
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Known Transactions	Last Sale Amount on Oct 11, 1995 Deed Sale Price on Oct 11, 1995 Prior Sale Amount on Nov 04, 1992
Deed Doc Number	19951554485
Last Transfer Date	Oct 02, 2006
Transfer Doc	0002810731
Record Refreshed	Sep 20, 2026

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	Longmont City
Unified School District	St. Vrain Valley School District RE 1J (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		$41,432 (+8.8%) Land $7,548 Building $33,884	$609,300 (-) Land $111,000 Building $498,300
2025	$3,341.00 (-3.75%)	$38,082 (-5.91%) Land $6,938 Building $31,144	$609,300 (+0.86%) Land $111,000 Building $498,300
2023	$3,471.00 (+14.33%)	$40,475 (+31.89%) Land $7,591 Building $32,884	$604,100 (+33.86%) Land $113,300 Building $490,800
2022	$3,036.00	$30,689 Land $5,420 Building $25,269	$451,300 Land $79,700 Building $371,600