3811 E 21st St, Casper, WY 82609 Property Records

Natrona County property record for 3811 E 21st St, Casper, WY 82609

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,922 sqft · built 1979
Lot Size	0.232 acres (10,125 sqft)
Owner	2 Individual Names on File
Tax Bill	$2,572 (2025)
Deeds & Mortgages	May 2025 Transfer Jun 2025 Transfer
Flood Zone	Zone X (minimal risk)
APN	`3379-13-21-6-00300`

Property Details

APN / Parcel Number

Primary APN	`3379-13-21-6-00300`
Alternative APNs	`07394008000200` `R0020810`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,922 sqft Living Area
Basement Area	1,922 sqft
Unfinished Basement	968 sqft
Interior Walls	Wallboard/Drywall
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1979
Effective Year Built	Effective 1979
Architectural Style	Ranch
Exterior Material	Wood
Construction Type	Frame
Roof Type	Gable/Hip
Roof Material	Composition Shingle
Lot Area	10,125 sqft (0.232 acres)
Garage Type	Attached
Garage Area	529 sqft
Parking Spaces	2 Parking Spaces

Exterior Amenities

Pool Type	Spa / Hot Tub (No Pool)
Porch	Slab
Deck Area	104 sqft
Storage Building	80 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0020810
Street Address	3811 E 21ST ST
City	CASPER
State	WY
Zip	82609-3633
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	PRATT #3 BLK 8 LOT 2
Legal Range	79W
Legal Township	33N
Legal Section	13
Legal Subdivision	PRATT #3
Legal Block	8
Legal Lot Number	2
Jurisdiction	NATRONA WY
Township / Civil Division	CASPER
Census Block Group	2
Census Block	2012
Census Tract	501

Owner

Source: Natrona County assessment roll, as of July 7, 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	3811 E 21ST ST, CASPER, WY 82609-3633
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Husband and Wife

Deeds, Mortgages & Sale History

Date	Document
May 30, 2025	Transfer on Death Deed, Transfer
Jun 20, 2025	Affidavit of Death of Joint Tenant, Transfer

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Jun 20, 2025
Deed Sale	Jun 20, 2025
Deed Document Number	20251172734
Record Updated	Sep 20, 2026

May 2025: Transfer on Death Deed, Transfer

Document Type	Transfer on Death Deed
Jurisdiction	NATRONA WY
Recording Date	May 30, 2025
Property Address	3811 E 21ST ST, CASPER, WY 82609-3633
Document Number	0001171860
Instrument Date	May 30, 2025
Instrument	1171860
Transaction Type	Transfer
Record Updated	Jan 19, 2026

Transaction

Tax	$0.00
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	11 81 RIVER HEIGHTS DRIVE, MILLS, WY 82604

June 2025: Affidavit of Death of Joint Tenant, Transfer

Document Type	Affidavit of Death of Joint Tenant
Jurisdiction	NATRONA WY
Recording Date	Jun 20, 2025
Property Address	3811 E 21ST ST, CASPER, WY 82609-3633
Document Number	0001172732
Instrument Date	Nov 20, 2001
Instrument	1172732
Transaction Type	Transfer
Record Updated	Jan 19, 2026

Transaction

Tax	$0.00
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name

Tax Assessment & Valuation

Source: Natrona County assessment roll, as of July 7, 2026

Property Jurisdictions

Type	Name
State	Wyoming
County	Natrona County
Municipality	Casper City
Unified School District	Natrona County School District 1 (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$35,293 (+36.81%) Land $6,531 Building $28,762	$384,682 (+6.25%) Land $68,749 Building $315,933
2025	$2,572.00 (+38.88%)	$25,798 (-27.21%) Land $5,056 Building $20,742	$362,069 (-2.94%) Land $70,955 Building $291,114
2024	$1,852.00 (-28.3%)
2023		$35,440 Land $5,762 Building $29,678	$373,053 Land $60,649 Building $312,404
2022	$2,583.00

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 January 2, 2020 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Claims	1 (2017)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Apr 2017 · other causes

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

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

Wildfire Risk	High above 73% of the US · above 73% of Wyoming
Wildfire Likelihood	0.2% annual chance
Exposure	Direct burnable vegetation at the parcel

Drinking Water

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

Water System	CITY OF CASPER serves 59,000 people · EPA ID WY5601415
Water Source	Purchased surface water from CENTRAL WY REGIONAL WATER SYSTEM JPB
Last State Inspection	Jun 2022
Lead	1 ppb (2024–2026) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None 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. This system sells water to local utilities; the supplier billing this address may be one of them.

Internet Providers

Source: FCC Broadband Data Collection, based on 186 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Clarity Telecom Fiber	5,000 / 5,000
Spectrum Cable	1,000 / 1,000
Mountain West Technologies Fixed Wireless · Fiber in parts of the area	300 / 50
Verizon Fixed Wireless	300 / 20
AT&T Fixed Wireless	100 / 20

May also be available: Lumen Technologies, Visionary Communications.

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