3878 E 99th Cir, Thornton (Denver), CO 80229 Property Records

Adams County property record for 3878 E 99th Cir, Thornton, CO 80229

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,180 sqft · built 1991
Lot Size	0.319 acres (13,939 sqft)
Owner	Individual Name on Record
Last Sale	$355,000 (Feb 2017)
Tax Bill	$1,431 (2025)
Deeds & Mortgages	Feb 2021 Mortgage Feb 2017 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`R0040343`

Property Details

APN / Parcel Number

Primary APN	`R0040343`
Alternative APNs	`0171913406011` `171913406011`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Plumbing Fixtures	16 Plumbing Fixtures
Total Rooms	7 Rooms
Stories	2 Stories
Building Area	2,180 sqft Living Area
1st Floor Area	1,060 sqft
2nd Floor Area	1,120 sqft
Basement Area	780 sqft
Finished Basement	670 sqft
Interior Walls	Wallboard/Drywall
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1991
Architectural Style	Other
Exterior Material	Aluminum/Vinyl
Construction Type	Frame
Roof Type	Gable
Roof Material	Composition Shingle
Lot Area	13,939 sqft (0.319 acres)
Garage Type	Attached
Garage Area	480 sqft
Parking Spaces	2 Parking Spaces
Porch	Porch
Porch Area	108 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air

Location & Zoning

Account Number	R0040343
Old Parcel Number	171913406011
Street Address	3878 E 99TH CIR
City	THORNTON
State	CO
Zip	80229-2839
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	SUB:NORTH HILLS FILING NUMBER ONE SUBD BLK:18 LOT:11
Legal Range	68W
Legal Township	02S
Legal Section	13
Legal Quarter	SW
Legal Subdivision	NORTH HILLS FILING NUMBER ONE SUBD
Legal Block	18
Legal Lot Number	11
Jurisdiction	ADAMS CO
Township / Civil Division	WEST ADAMS
Census Block Group	1
Census Block	1002
Census Tract	9207

Owner

Source: Adams County records, as of February 9, 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 Record
Co-owner	Co-owner on Record
Mailing Address	3878 E 99TH CIR, THORNTON, CO 80229-2839
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Feb 3, 2021	Deed of Trust, Mortgage · Conventional Mortgage FAIRWAY INDEPENDENT MORTGAGE CORP
Feb 23, 2017	Warranty Deed, Transfer · Conventional Mortgage UNIVERSAL AMERICAN MORTGAGE CO

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Feb 23, 2017 · Amount on Record
Deed Sale	Feb 23, 2017 · Amount on Record
Prior Sale	Oct 25, 2012 · Amount on Record
Deed Document Number	2017000016362
Record Updated	Jun 8, 2026

February 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ADAMS CO
Property Address	3878 E 99TH CIR, THORNTON, CO 80229-2839
Transaction Type	Mortgage
Record Updated	Feb 9, 2021
Title Company	FIRST INTEGRITY TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000012988
Date	Feb 3, 2021
Instrument	2021000012988

Lender

Name	FAIRWAY INDEPENDENT MORTGAGE CORP
Type	Mortgage Company
Address	CARROLLTON, TX 75007

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Feb 1, 2051

February 2017: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	ADAMS CO
Recording Date	Feb 23, 2017
Property Address	3878 E 99TH CIR, THORNTON, CO 80229-2839
Document Number	0000016362
Instrument Date	Feb 21, 2017
Instrument	2017000016362
Transaction Type	Transfer
Record Updated	Jan 27, 2022
Title Company	HOMESTEAD TITLE & ESCROW

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$35.50
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3878 E 99TH CIR, THORNTON, CO 80229-2839

Mortgage

Document Number	0000016363
Date	Feb 23, 2017
Instrument	2017000016363

Lender

Name	UNIVERSAL AMERICAN MORTGAGE CO
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Mar 1, 2047

Tax Assessment & Valuation

Source: Adams County assessment roll, as of August 25, 2025

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

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$1,431.00 (-64.53%)	$33,760 (-17.38%) Land $5,630 Building $28,130	$540,000 (-10.6%) Land $90,000 Building $450,000
2023	$4,034.00 (+8.59%)	$40,860 (+9.63%) Land $5,750 Building $35,110	$604,000 (+12.65%) Land $85,000 Building $519,000
2022	$3,715.00	$37,270 Land $11,820 Building $25,450	$536,192 Land $170,000 Building $366,192

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.

Flood

Source: FEMA National Flood Hazard Layer, effective October 2, 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

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

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Low lower than 98% of the US · lower than 99.2% of Colorado
Wildfire Likelihood	Under 0.01% annual chance
Exposure	None beyond ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	CITY OF THORNTON serves 226,465 people · EPA ID CO0101150
Water Source	Surface water
Last State Inspection	Jul 2024
Lead	2 ppb (2025) action level 15 ppb

Violations Reported to EPA

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, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 791 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
CenturyLink DSL · Fiber in parts of the area	140 / 20
Rise Broadband Fixed Wireless	100 / 20
AT&T Fixed Wireless	100 / 20

May also be available: Aerux Broadband, T-Mobile.

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