Adams County property record for 4550 E 121st Pl, Thornton, CO 80241
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 1,954 sqft · built 1980 |
| Lot Size | 0.169 acres (7,405 sqft) |
| Owner | Individual Name on File |
| Last Sale | $460,000 (Jul 2025) |
| Tax Bill | $1,068 (2025) |
| Deeds & Mortgages | Dec 2019 Line of Credit Jan 2017 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | R0011696 |
| Primary APN | R0011696 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Plumbing Fixtures | 11 Plumbing Fixtures |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 1,954 sqft Living Area |
| 1st Floor Area | 1,046 sqft |
| 2nd Floor Area | 908 sqft |
| Basement Area | 806 sqft |
| Finished Basement | 282 sqft |
| Interior Walls | Wallboard/Drywall |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1980 |
|---|---|
| Architectural Style | Other |
| Exterior Material | Aluminum/Vinyl |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Composition Shingle |
| Lot Area | 7,405 sqft (0.169 acres) |
| Lot Dimensions | 106 ft deep x 71 ft wide |
| Garage Type | Attached |
| Garage Area | 420 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Open Porch |
| Porch Area | 829 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air |
| Account Number | R0011696 |
|---|---|
| Old Parcel Number | 157131319009 |
| Street Address | 4550 E 121ST PL |
| City | THORNTON |
| State | CO |
| Zip | 80241-3631 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | SUB:NORTHAVEN BLK:4 LOT:11 |
| Legal Range | 67W |
| Legal Township | 01S |
| Legal Section | 31 |
| Legal Quarter | NE |
| Legal Subdivision | NORTHAVEN |
| Legal Block | 4 |
| Legal Lot Number | 11 |
| Jurisdiction | ADAMS CO |
| Township / Civil Division | WEST ADAMS |
| Census Block Group | 2 |
| Census Block | 2005 |
| Census Tract | 8547 |
Source: Adams County records · APN R0011696
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 Name on File |
|---|---|
| Mailing Address | 4550 E 121ST PL, THORNTON, CO 80241-3631 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Dec 27, 2019 | Deed of Trust, Mortgage · Line of Credit CREDIT UNION OF COLORADO |
| Jan 26, 2017 | Deed of Trust, Mortgage · Conventional Mortgage COLORADO CU |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Jul 03, 2025 · Amount on Record |
| Deed Sale | Jul 03, 2025 · Amount on Record |
| Prior Sale | Jan 05, 2000 · Amount on Record |
| Deed Document Number | 2025000038800 |
| Record Updated | Jun 08, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ADAMS CO |
| Property Address | 4550 E 121ST PL, THORNTON, CO 80241-3631 |
| Transaction Type | Mortgage |
| Record Updated | Feb 05, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0000114240 |
|---|---|
| Date | Dec 27, 2019 |
| Instrument | 2019000114240 |
| Name | CREDIT UNION OF COLORADO |
|---|---|
| Type | Credit Union |
| Address | DENVER, CO 80203 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 300 Months |
| Due | Dec 26, 2044 |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ADAMS CO |
| Property Address | 4550 E 121ST PL, THORNTON, CO 80241-3631 |
| Document Number | 0000009450 |
| Instrument Date | Jan 26, 2017 |
| Transaction Type | Mortgage |
| Record Updated | Feb 09, 2017 |
| Name | Verified Name |
|---|---|
| Address | 4550 E 121ST PL THORNTON CO 802413631, THORNTON, CO 80241-3631 |
| Document Number | 0000009450 |
|---|---|
| Date | Jan 31, 2017 |
| Instrument | 9450 |
| Name | COLORADO CU |
|---|---|
| Type | Credit Union |
| Address | DENVER, CO 80203 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 180 Months |
| Due | Jan 30, 2032 |
Source: Adams County records · Assessment roll updated August 25, 2025 · Last verified February 2026
| Type | Name |
|---|---|
| State | Colorado |
| County | Adams County |
| Municipality | Thornton City |
| Unified School District | Adams 12 Five Star Schools (PK - 12) |
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 |
|---|---|---|---|
| 2025 | $1,068.00 (-74.57%) | $25,190 (-34.55%) Land $4,810 Building $20,380 | $503,000 (-11.6%) Land $96,000 Building $407,000 |
| 2023 | $4,199.00 (+15.33%) | $38,490 (+16.42%) Land $5,820 Building $32,670 | $569,000 (+19.64%) Land $86,000 Building $483,000 |
| 2022 | $3,641.00 | $33,060 Land $11,960 Building $21,100 | $475,577 Land $172,000 Building $303,577 |
Source: FEMA National Flood Hazard Layer as of October 2, 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values are read at the parcel center point; lenders make the official flood determination.
Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Lumen Technologies Fiber · DSL in parts of the area | 8,000 / 8,000 |
| Xfinity Cable | 2,000 / 250 |
| JAB Wireless Fixed Wireless | 300 / 60 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: AT&T, BIF IV Intrepid HoldCo, T-Mobile USA, Ting Fiber.
Based on FCC filings for 820 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | CITY OF THORNTON serves 226,465 people |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jul 2024 |
| Lead | 2 ppb (2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 3 last 3 years |
Results are for the whole water system as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures