4531 E 121st Pl, Thornton, CO 80241 Property Records

Adams County property record for 4531 E 121st Pl, Thornton, CO 80241 · Last verified August 2026

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,439 sqft · built 1980
Lot Size	0.191 acres (8,325 sqft)
Owner	Individual Name on File
Tax Bill	$1,370 (2025)
Deeds & Mortgages	Dec 2020 Mortgage Sep 2018 Line of Credit + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1571-31-3-18-004`

Property Details

APN / Parcel Number

Primary APN	`1571-31-3-18-004`
Alternative APNs	`0157131318004` `R0011681`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Plumbing Fixtures	11 Plumbing Fixtures
Total Rooms	7 Rooms
Stories	2 Stories
Building Area	2,439 sqft Living Area
Gross Area	3,140 sqft
1st Floor Area	1,031 sqft
2nd Floor Area	948 sqft
Basement Area	576 sqft
Finished Basement	460 sqft
Unfinished Basement	116 sqft
Interior Walls	Wallboard/Drywall
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1980
Effective Year Built	Effective 1980
Architectural Style	Split Level
Exterior Material	Aluminum/Vinyl
Construction Type	Frame
Roof Type	Gable
Roof Material	Composition Shingle
Lot Area	8,325 sqft (0.191 acres)
Lot Dimensions	111 ft deep x 75 ft wide
Garage Type	Attached
Garage Area	585 sqft
Parking Spaces	2 Parking Spaces
Porch	Open Slab
Porch Area	450 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0011681
Street Address	4531 E 121ST PL
City	THORNTON
State	CO
Zip	80241-3631
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	SUB:NORTHAVEN BLK:5 LOT:3
Legal Range	67W
Legal Township	01S
Legal Section	31
Legal Quarter	3
Legal Subdivision	NORTHAVEN
Legal Block	5
Legal Lot Number	3
Jurisdiction	ADAMS CO
Township / Civil Division	WEST ADAMS
Census Block Group	2
Census Block	2005
Census Tract	8547

Owner

Source: Adams County records · APN 1571-31-3-18-004

Assessment roll updated January 21, 2026 · Last verified August 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Individual Name on File
Mailing Address	4531 E 121ST PL, DENVER, CO 80241-3631
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Dec 02, 2020	Deed of Trust, Mortgage · Conventional Mortgage AMERICAN FINANCING CORP
Sep 25, 2018	Deed of Trust, Mortgage · Line of Credit FLAGSTAR BANK FSB
Apr 01, 2017	Deed of Trust, Mortgage · Conventional Mortgage AMERICAN FINANCING

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Jan 16, 2009
Deed Sale	Jan 16, 2009
Prior Sale	Jul 20, 2005 · Amount on Record
Deed Document Number	20093399
Prior Transfer Date	Sep 25, 2002
Prior Transfer Doc	00C1037605
Record Updated	Sep 20, 2026

December 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ADAMS CO
Property Address	4531 E 121ST PL, THORNTON, CO 80241-3631
Transaction Type	Mortgage
Record Updated	Jul 26, 2022
Title Company	FITCO

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000125131
Date	Dec 02, 2020
Instrument	2020000125131

Lender

Name	AMERICAN FINANCING CORP
Type	Lending Institution
Address	AURORA, CO 80014

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Dec 01, 2050

September 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ADAMS CO
Property Address	4531 E 121ST PL, THORNTON, CO 80241-3631
Transaction Type	Mortgage
Record Updated	Jul 26, 2022
Title Company	AMERICAN TITLE INC

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000077858
Date	Sep 25, 2018
Instrument	2018000077858

Lender

Name	FLAGSTAR BANK FSB
Type	Bank
Address	TROY, MI 48098

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	360 Months
Due	Sep 01, 2048

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

April 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ADAMS CO
Property Address	4531 E 121ST PL, THORNTON, CO 80241-3631
Document Number	0000030921
Instrument Date	Apr 01, 2017
Transaction Type	Mortgage
Record Updated	Apr 18, 2017
Title Company	OTHER

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4531 E 121ST PL THORNTON CO 802413631, THORNTON, CO 80241-3631

Mortgage

Document Number	0000030921
Date	Apr 10, 2017
Instrument	30921

Lender

Name	AMERICAN FINANCING
Type	Funding / Finance Company
Address	AURORA, CO 80014

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Apr 09, 2047

Tax Assessment & Valuation

Source: Adams County records · Assessment roll updated January 21, 2026 · Last verified August 2026

Property Jurisdictions

Type	Name
State	Colorado
County	Adams County
Municipality	Thornton City
Unified School District	Adams 12 Five Star Schools (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	$1,370.00 (-62.87%)	$35,160 (-10.69%) Land $6,530 Building $28,630	$517,000 (-11.17%) Land $96,000 Building $421,000
2024	$3,690.00 (-14.09%)
2023	$4,295.00 (+12.94%)	$39,370 (+14.02%) Land $5,820 Building $33,550	$582,000 (+17.15%) Land $86,000 Building $496,000
2022	$3,803.00	$34,530 Land $11,960 Building $22,570	$496,797 Land $172,000 Building $324,797

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Adams County (08001C), updated October 2, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X
Special Flood Hazard Area	No
Flood Hazard	Minimal
500-Year Floodplain	No

Wildfire

Wildfire Risk	Not rated no burnable land in reach
Wildfire Likelihood	Negligible
Exposure	None beyond ember reach

Values are read at the parcel center point; lenders make the official flood determination.

Internet Providers

Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 820 locations within about half a mile of this property

Provider	Technology	Download / Upload (Mbps)
Lumen Technologies	Fiber	8,000 / 8,000
Xfinity	Cable	2,000 / 250
JAB Wireless	Fixed Wireless (unlicensed)	300 / 60
Verizon	Fixed Wireless	300 / 20

May also be available at this address: T-Mobile USA, Ting Fiber, BIF IV Intrepid HoldCo, AT&T, Lumen Technologies. Availability varies by address; speeds are provider-advertised maximums, not measured.

Mobile Coverage

5G and 4G LTE

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