4371 E 109th Ave, Thornton (Denver), CO 80233 Property Records

Adams County property record for 4371 E 109th Ave, Thornton, CO 80233

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 1,034 sqft · built 1978
Lot Size	0.2 acres (8,712 sqft)
Owner	2 Individual Names on File
Tax Bill	$866 (2025)
Flood Zone	Zone X (minimal risk)
APN	`R0074351`

Property Details

APN / Parcel Number

Primary APN	`R0074351`
Alternative APNs	`0172107212006` `172107212006`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Plumbing Fixtures	6 Plumbing Fixtures
Total Rooms	5 Rooms
Stories	1 Story
Building Area	1,034 sqft Living Area
1st Floor Area	1,034 sqft
Basement Area	960 sqft
Interior Walls	Wallboard/Drywall
Fireplace	Fireplace

Exterior

Year Built	Built 1978
Architectural Style	Ranch
Exterior Material	Aluminum/Vinyl
Construction Type	Frame
Roof Type	Gable
Roof Material	Composition Shingle
Lot Area	8,712 sqft (0.2 acres)
Lot Dimensions	105 ft deep x 85 ft wide
Garage Type	Attached
Garage Area	480 sqft
Parking Spaces	2 Parking Spaces
Porch	Open Porch
Porch Area	120 sqft

Utilities, Heating & Cooling

Heating System	Baseboard
Heating Fuel	Electric

Location & Zoning

Account Number	R0074351
Old Parcel Number	172107212006
Street Address	4371 E 109TH AVE
City	THORNTON
State	CO
Zip	80233-5401
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	SUB:GRANGE CREEK PHASE 1 PUD FILING NO 4 LOT:13
Legal Range	67W
Legal Township	02S
Legal Section	07
Legal Quarter	NW
Legal Subdivision	GRANGE CREEK
Legal Phase	1
Legal Block	12
Legal Lot Number	13
Jurisdiction	ADAMS CO
Township / Civil Division	WEST ADAMS
Census Block Group	2
Census Block	2008
Census Tract	8534

Owner

Source: Adams County records · APN R0074351

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	2 Individual Names on File
Mailing Address	4371 E 109TH AVE, THORNTON, CO 80233-5401
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Record Updated	Jun 08, 2026

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	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	$866.00 (-73.75%)	$20,440 (-32.41%) Land $4,550 Building $15,890	$427,000 (-4.47%) Land $95,000 Building $332,000
2023	$3,299.00 (+10.59%)	$30,240 (+11.67%) Land $6,090 Building $24,150	$447,000 (+14.74%) Land $90,000 Building $357,000
2022	$2,983.00	$27,080 Land $11,400 Building $15,680	$389,587 Land $164,000 Building $225,587

Flood & Wildfire

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

Flood

FEMA Flood Zone	Zone X minimal risk
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it

Wildfire

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

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Ting Fiber Fiber	2,000 / 2,000
BIF IV Intrepid HoldCo Fiber	2,000 / 2,000
Xfinity Cable	1,200 / 35
JAB Wireless Fixed Wireless	300 / 60
Lumen Technologies DSL	140 / 20

May also be available: Aerux, T-Mobile USA, Verizon.

Based on FCC filings for 591 locations within half a mile of this property.

Drinking Water

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

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 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.