105 Koster St, Madison, WI 53713 Property Records

Dane County property record for 105 Koster St, Madison, WI 53713

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,212 sqft · built 1965
Lot Size	0.213 acres (9,296 sqft)
Owner	Individual Name on File
Last Sale	$300,000 (Dec 2025)
Tax Bill	$4,975 (2024)
Deeds & Mortgages	Apr 2022 Mortgage Feb 2025 Line of Credit + 1 more
Flood Zone	Zone X (minimal risk)
APN	`0709-351-1402-8`

Property Details

APN / Parcel Number

Primary APN	`0709-351-1402-8`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	8 Rooms
Stories	1 Story
Building Area	1,212 sqft Living Area
1st Floor Area	912 sqft
Basement Area	912 sqft
Finished Basement	300 sqft
Family Room	Family Room
Flooring	Wood
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1965
Effective Year Built	Effective 1982
Architectural Style	Ranch
Exterior Material	Aluminum/Vinyl
Foundation Type	Concrete
Roof Material	Asphalt
Lot Area	9,296 sqft (0.213 acres)
Lot Dimensions	143 ft deep x 65 ft wide
Terrain	Wooded
Garage Type	Detached
Garage Area	742 sqft
Driveway	Driveway
Driveway Area	56 sqft
Parking Spaces	3 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	105 KOSTER ST
City	MADISON
State	WI
Zip	53713-1401
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	TR-C1
Legal Description	CAPITOL VIEW HTS PLAT, LOT 20
Legal Range	09
Legal Township	07
Legal Section	35
Legal Subdivision	CAPITOL VIEW HTS PLAT
Legal Lot Number	20
Jurisdiction	DANE WI
Township / Civil Division	MADISON
Census Block Group	4
Census Block	4023
Census Tract	1401

Owner

Source: Dane County records, as of January 22, 2026

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

Owner of Record	Individual Name on File
Mailing Address	105 KOSTER ST, MADISON, WI 53713-1401
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Apr 21, 2022	Deed of Trust, Mortgage · Conventional Mortgage UNIVERSITY OF WISCONSIN CU
Feb 20, 2025	Deed of Trust, Mortgage · Line of Credit UNIVERSITY OF WISCONSIN CU
Dec 1, 2025	Warranty Deed, Transfer · Conventional Mortgage UNIVERSITY OF WISCONSIN CU

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Dec 1, 2025 · Amount on File
Deed Sale	Dec 1, 2025 · Amount on File
Prior Sale	Nov 30, 2016 · Amount on File
Deed Document Number	6066638
Record Updated	Jun 8, 2026

April 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	DANE WI
Property Address	105 KOSTER ST, MADISON, WI 53713-1401
Transaction Type	Mortgage
Record Updated	Dec 18, 2025

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0005828078
Date	Apr 21, 2022
Instrument	5828078

Lender

Name	UNIVERSITY OF WISCONSIN CU
Type	Credit Union

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Apr 20, 2052

Interest

Rate Type	Fixed Rate

February 2025: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	DANE WI
Property Address	105 KOSTER ST, MADISON, WI 53713-1401
Transaction Type	Mortgage
Record Updated	Dec 18, 2025

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0006012001
Date	Feb 20, 2025
Instrument	6012001

Lender

Name	UNIVERSITY OF WISCONSIN CU
Type	Credit Union

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	360 Months
Due	Feb 19, 2055

December 2025: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	DANE WI
Recording Date	Dec 1, 2025
Property Address	105 KOSTER ST, MADISON, WI 53713-1401
Document Number	0006066638
Instrument Date	Nov 24, 2025
Instrument	6066638
Transaction Type	Transfer
Record Updated	Dec 18, 2025

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$900.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	105 KOSTER ST, MADISON, WI 53713-1401

Mortgage

Document Number	0006066639
Date	Dec 1, 2025
Instrument	6066639

Lender

Name	UNIVERSITY OF WISCONSIN CU
Type	Credit Union

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Dec 1, 2055

Tax Assessment & Valuation

Source: Dane County assessment roll, as of January 1, 2025

Property Jurisdictions

Type	Name
State	Wisconsin
County	Dane County
Municipality	Madison City
Unified School District	Madison Metropolitan School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2025		$268,100 (-) Land $70,200 Building $197,900
2024	$4,975.00 (+9.9%) Homeowner's exemption	$268,100 (+8.98%) Land $70,200 Building $197,900	$268,100
2023		$246,000 Land $64,400 Building $181,600
2022	$4,527.00

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 September 20, 2026 · 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 Policies	2 in force

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	Low lower than 99.1% of the US · lower than 97.9% of Wisconsin
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	MADISON WATER UTILITY serves 272,000 people · EPA ID WI1130224
Water Source	Groundwater
Last State Inspection	Apr 2023
Lead	2 ppb (2023) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	Lead service line inventory Oct 2024
Monitoring and Reporting	1 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 342 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
LiteWire Fixed Wireless	100 / 25

May also be available: AT&T, Four Lakes Broadband, T-Mobile, Verizon.

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