331 Union St, Sun Prairie, WI 53590 Property Records

Dane County property record for 331 Union St, Sun Prairie, WI 53590

Property Summary

Property Type	Single Family Home
Details	5 bd · 2 ba · 2,224 sqft · built 1969
Lot Size	0.42 acres (18,295 sqft)
Owner	Company Name on File
Last Sale	$285,000 (Oct 2018)
Tax Bill	$6,978 (2025)
Deeds & Mortgages	Nov 2020 Mortgage Dec 2020 Transfer + 1 more
Flood Zone	Zone X (minimal risk)
APN	`0811-052-9850-3`

Property Details

APN / Parcel Number

Primary APN	`0811-052-9850-3`

Interior

Bedrooms	5 Beds
Full Baths	2 Baths
Units	2 Units
Stories	1 Story
Building Area	2,224 sqft Total Area
1st Floor Area	2,224 sqft
Basement Area	2,092 sqft
Family Room	Family Room
Game Room	Game Room
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1969
Effective Year Built	Effective 1969
Architectural Style	Ranch
Lot Area	18,295 sqft (0.42 acres)
Garage Type	Attached
Garage Area	504 sqft
Parking Spaces	4 Parking Spaces
Patio Area	180 sqft

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Forced Air with A/C
Heating Fuel	Gas
Sewer	Connected
Water Source	Commercial

Location & Zoning

Street Address	331 UNION ST
City	SUN PRAIRIE
State	WI
Zip	53590-2147
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	SR4
Legal Description	SEC 5-8-11 PRT SE1/4 NW1/4 BEG 60 FT E OF SE COR LOT 60 FIRST ADDN VILLAGE VIEW HEIGHTS TH N86DEG16E 122.0 FT TH N3DEG25W 150.00 FT TO S LN OF LINCOLN DR TH S 86DEG16W 122.00 FT ALG S LN OF LINCOLN DR TH S3DEG25E 150.00 FT ALG E R/W OF U NION ST TO P
Legal Range	11E
Legal Township	08N
Legal Section	05
Legal Subdivision	VILLAGE VIEW HEIGHTS
Legal Block	98
Legal Lot Number	60
Jurisdiction	DANE WI
Township / Civil Division	SUN PRAIRIE
Census Block Group	1
Census Block	1005
Census Tract	11505

Owner

331 Union St is owned by a company that acquired it in December 2020.

Source: Dane County records, as of April 20, 2026

Owner of Record	Company Name on File
Mailing Address	171 N MALLARD DR, SUN PRAIRIE, WI 53590-1670
Owner Type	Company
Vesting	Limited Liability Company

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Date	Document
Nov 19, 2020	Deed of Trust, Mortgage · Conventional Mortgage SUMMIT CU
Dec 28, 2020	Quit Claim Deed, Transfer ATTORNEY ONLY
Oct 17, 2018	Grant Deed, Transfer · Conventional Mortgage SUMMIT CU

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Oct 17, 2018 · Amount on File
Deed Sale	Oct 17, 2018 · Amount on File
Deed Document Number	20185448459
Last Transfer Date	Dec 11, 2020
Transfer Doc	0005678010
Record Updated	Oct 29, 2026

November 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	DANE WI
Property Address	331 UNION ST, SUN PRAIRIE, WI 53590-2147
Transaction Type	Mortgage
Record Updated	Jun 14, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0005663727
Date	Nov 19, 2020
Instrument	5663727

Lender

Name	SUMMIT CU
Type	Credit Union

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	180 Months
Due	Dec 1, 2035

Interest

Rate Type	Fixed Rate

December 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	DANE WI
Recording Date	Dec 28, 2020
Property Address	331 UNION ST, SUN PRAIRIE, WI 53590-2147
Document Number	0005678010
Instrument Date	Dec 11, 2020
Instrument	5678010
Transaction Type	Transfer
Record Updated	Jan 11, 2021
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	331 UNION ST SUN PRAIRIE WI 535902147, SUN PRAIRIE, WI 53590-2147

October 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	DANE WI
Recording Date	Oct 17, 2018
Property Address	331 UNION ST, SUN PRAIRIE, WI 53590-2147
Document Number	0005448459
Instrument Date	Oct 16, 2018
Instrument	5448459
Transaction Type	Transfer
Record Updated	Nov 7, 2018
Title Company	ATTORNEY ONLY

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$855.00
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	171 N MALLARD DR SUN PRAIRIE WI 535901670, SUN PRAIRIE, WI 53590-1670

Mortgage

Document Number	5448460
Date	Oct 17, 2018
Instrument	5448460

Lender

Name	SUMMIT CU
Address	MADISON, WI 53708

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Oct 16, 2048

Interest

Rate Type	Adjustable Rate
Rate	4.5%

Tax Assessment & Valuation

The 2025 property tax bill for 331 Union St was $6,978.

Source: Dane County assessment roll, as of March 16, 2026

Property Jurisdictions

Type	Name
State	Wisconsin
County	Dane County
Municipality	Sun Prairie City
Unified School District	Sun Prairie Area School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$6,978.00 Homeowner's exemption	$344,800 Land $80,300 Building $264,500	$391,100
2023		$344,800 Land $80,300 Building $264,500	$344,800 Land $80,300 Building $264,500
2022	$6,220.00

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

Flood

FEMA maps place 331 Union St in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective September 20, 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

Wildfire risk around 331 Union St is low, with less than a 0.01% annual chance of wildfire.

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

Wildfire Risk	Low lower than 96% of the US · lower than 90% of Wisconsin
Wildfire Likelihood	Under 0.01% annual chance
Exposure	Direct burnable vegetation

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	SUN PRAIRIE UTILITIES serves 39,300 people · EPA ID WI1130258
Water Source	Groundwater
Last State Inspection	Feb 2026
Lead	3 ppb (2023) action level 15 ppb

Violations Reported to EPA

Water Quality	Fluoride resolved · Jan 2023
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. The service area is an EPA estimate; the actual supplier may differ.

Internet Providers

Source: FCC Broadband Data Collection, based on 449 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
TDS Telecom Fiber	8,000 / 8,000
Spectrum Cable	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
T-Mobile Fixed Wireless	100 / 20

May also be available: Bertram Communications, Frontier, LiteWire.

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