3899 E 99th Cir, Thornton (Denver), CO 80229 Property Records

Adams County property record for 3899 E 99th Cir, Thornton, CO 80229

Property Summary

Property Type	Single Family Home
Details	3 bd · 1.5 ba · 1,476 sqft · built 1989
Lot Size	0.127 acres (5,520 sqft)
Owner	2 Individual Names on Record
Tax Bill	$898 (2025)
Deeds & Mortgages	Oct 2017 Transfer May 2017 Loan Modification
Flood Zone	Zone X (minimal risk)
APN	`1719-13-4-06-008`

Property Details

APN / Parcel Number

Primary APN	`1719-13-4-06-008`
Alternative APNs	`0171913406008` `R0040340`

Interior

Bedrooms	3 Beds
Full Baths	1.5 Baths
Half Baths	1 Half Bath
Plumbing Fixtures	8 Plumbing Fixtures
Total Rooms	6 Rooms
Stories	2 Stories
Building Area	1,476 sqft Living Area
Gross Area	2,475 sqft
1st Floor Area	828 sqft
2nd Floor Area	648 sqft
Basement Area	600 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1989
Effective Year Built	Effective 1989
Exterior Material	Aluminum/Vinyl
Construction Type	Frame
Roof Type	Gable
Roof Material	Composition Shingle
Lot Area	5,520 sqft (0.127 acres)
Lot Dimensions	92 ft deep x 60 ft wide
Garage Type	Attached
Garage Area	399 sqft
Parking Spaces	1 Parking Space
Porch	Open Slab
Porch Area	144 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0040340
Street Address	3899 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:8
Legal Range	68W
Legal Township	02S
Legal Section	13
Legal Quarter	4
Legal Subdivision	NORTH HILLS FILING NUMBER ONE SUBD
Legal Block	18
Legal Lot Number	8
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 January 21, 2026

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

Owner of Record	2 Individual Names on Record
Mailing Address	3899 E 99TH CIR, THORNTON, CO 80229-2839
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Date	Document
Oct 16, 2017	Quit Claim Deed, Transfer Quitclaim
May 22, 2017	Loan Modification, Mortgage · Conventional Mortgage WELLS FARGO BK

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jan 9, 2025
Deed Sale	Jan 9, 2025
Prior Sale	Dec 2, 1993
Deed Document Number	20251433
Prior Transfer Date	Dec 19, 2024
Prior Transfer Doc	0000001433
Record Updated	Sep 20, 2026

October 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	ADAMS CO
Recording Date	Oct 16, 2017
Property Address	3899 E 99TH CIR, THORNTON, CO 80229-2839
Document Number	0000090307
Instrument Date	Oct 6, 2017
Instrument	90307
Transaction Type	Transfer
Record Updated	Oct 26, 2017

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3899 E 99TH CIR THORNTON CO 802292839, THORNTON, CO 80229-2839

May 2017: Loan Modification, Mortgage

Document Type	Loan Modification
Jurisdiction	ADAMS CO
Property Address	3899 E 99TH CIR, THORNTON, CO 80229-2839
Document Number	0000003105
Instrument Date	May 22, 2017
Transaction Type	Mortgage
Record Updated	Aug 29, 2018
Title Company	SERVICELINK

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3899 E 99TH CIR THORNTON CO 802292839, THORNTON, CO 80229-2839

Mortgage

Document Number	0000003105
Date	Jan 10, 2018
Instrument	3105

Lender

Name	WELLS FARGO BK
Type	Bank
Address	FORT MILL, SC 29715

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	468 Months
Due	Jan 9, 2057

Interest

Rate Type	Fixed Rate
Rate	4.5%

Tax Assessment & Valuation

Source: Adams County assessment roll, as of January 21, 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

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$898.00 (-57.76%)	$29,850 (-9.76%) Land $6,120 Building $23,730	$439,000 (-10.22%) Land $90,000 Building $349,000
2024	$2,126.00 (-34.91%)
2023	$3,266.00 (+11.35%)	$33,080 (+12.4%) Land $5,750 Building $27,330	$489,000 (+15.48%) Land $85,000 Building $404,000
2022	$2,933.00	$29,430 Land $11,820 Building $17,610	$423,441 Land $170,000 Building $253,441

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

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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