3661 E 99th Ln, Thornton (Denver), CO 80229 Property Records

Adams County property record for 3661 E 99th Ln, Thornton, CO 80229 · Last verified February 2026

Property Highlights

Property Type	Residential > Single Family > Home
Bedrooms	4 Beds
Bathrooms	3 Baths
Year Built	Built 1986
Square Footage	2,084 sqft Living Area
Lot Size	9,583 sqft (0.219 acres)
Garage	Attached, 399 sqft
Occupancy	Owner Occupied
Tax Bill	$1,272.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`R0040354`
Alternative APNs	`0171913407003` `171913407003`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Plumbing Fixtures	12 Plumbing Fixtures
Total Rooms	7 Rooms
Building Area	2,084 sqft Living Area
1st Floor	828 sqft 1st Floor
2nd Floor	648 sqft 2nd Floor
Stories	2 Stories
Interior Structure	Wallboard/Drywall Interior Structure
Fireplace	Fireplace
Fireplaces	1 Fireplaces

Exterior

Year Built	Built 1986
Architectural Style	Other Style
Exterior Material	Aluminum/Vinyl Exterior
Construction Type	Frame Construction
Roof Construction	Gable Roof Construction
Roof Material	Composition Shingle Roof
Lot Area	9,583 sqft (0.219 acres)
Depth X Width	135 ft x 70 ft Depth x Width
Parking Spaces	1 Parking Spaces
Garage Type	Attached Garage
Garage Area	399 sqft Garage
Porch	Porch
Porch Area	428 sqft Porch

Utilities and HVAC

Cooling System	Central Cooling
Heating System	Forced Air Heating

Location & Zoning

Account Number	R0040354
Old Parcel Number	171913407003
Street Address	3661 E 99TH LN
City	THORNTON
State	CO
Zip	80229-2842
Property Usage	Residential Property Usage
Type	Residential > Single Family > Home
Legal Description	SUB:NORTH HILLS FILING NUMBER ONE SUBD BLK:3 LOT:3
Legal Range	68W
Legal Township	02S
Legal Section	13
Legal Quarter	SW
Legal Subdivision	NORTH HILLS FILING NUMBER ONE SUBD
Legal Block	3
Legal Lot Number	3
Jurisdiction	ADAMS CO
Minor Civil Division	WEST ADAMS
Census Blockgroup	1
Census Block	1002
Census Tract	9207

Owner

Source: Adams County records · APN R0040354

Assessment roll updated August 25, 2025 · Last verified February 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	3661 E 99TH LN, THORNTON, CO 80229-2842
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	Feb 03, 1993
Deed Doc Number	17751
Record Refreshed	Jun 08, 2026

May 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ADAMS CO
Property Address	3661 E 99TH LN, THORNTON, CO 80229-2842
Document Number	0000043450
Instrument Date	May 13, 2017
Transaction Type	Mortgage
Record Updated	May 30, 2017

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3661 E 99TH LN THORNTON CO 802292842, THORNTON, CO 80229-2842

Mortgage

Document Number	0000043450
Date	May 19, 2017
Instrument	43450

Lender

Name	BELLCO CU
Type	Credit Union
Address	GREENWOOD, CO 80111

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	240 Months
Due	May 18, 2037

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

Source: Adams County records · Assessment roll updated August 25, 2025 · Last verified February 2026

Property Jurisdictions

Type	Name
State	Colorado
County	Adams County
Municipality	Thornton City
Unified School District	Mapleton School District 1 (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
2025	$1,272.00 (-64.93%)	$30,010 (-18.3%) Land $5,630 Building $24,380	$480,000 (-11.6%) Land $90,000 Building $390,000
2023	$3,627.00 (+8.53%)	$36,730 (+9.54%) Land $5,750 Building $30,980	$543,000 (+12.58%) Land $85,000 Building $458,000
2022	$3,342.00	$33,530 Land $11,820 Building $21,710	$482,309 Land $170,000 Building $312,309