400 S Library St is a 960 square foot house on a 4,785 square foot lot with 2 bedrooms and 2 bathrooms. - it last sold on September 19, 2025 for $195,000. Based on Redfin's Waterloo data, we estimate the home's value is $211,242.
Single-familyProperty Type
1923Year Built
4,785 sq ftLot Size
$220Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$211,242
$16K since sold in September 2025$2,000 since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 12.9% higher than the average sale price ($187K) of 5 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
R3
Single-Family Residence Districts
The Single-Family Residence Districts, as differentiated herein, and the district locations as depicted on the Zone District Map, reflect the wide variety of physical and social characteristics found in Waterloo, to the extent that the range of such conditions and characteristics can be divided into meaningful categories. It is the purpose of these regulations to encourage the creation and maintenance of stable and enduring residential areas by establishing limitations on the use and character of development so as to take advantage of, or to avoid conflict with, natural topography, existing development, arrangements and locations of existing or planned community facilities and social needs of the city.
Permitted uses
Include but are not limited to:
Housing-Single unit
Property details
Interior
Basement Information
Basement Sq. Ft: 960
Basement Type: Full
Bathroom Information
# of Bathroom Fixtures: 6
Heating & Cooling
Air Conditioning Type: Central
Exterior
Exterior Information
Physical Condition: Average
Exterior Wall: Frame
Building Type: Single Family
Property Information
Subdivision Name: MARTINS ADD
Living Sq. Ft: 960
Ground Floor Sq. Ft: 960
Building Sq. Ft: 1,920
# of Stories: 1
Stories Type: 1
Legal Description: LOT 11A BLK 21 MARTIN'S ADDN
Parking & Garage Information
Parking Type: Carport
Garage / Carport Type: Carport
Lot Information
# of Buildings: 1
Land Sq. Ft: 4,785
Legal Lot Number: 11A
Legal Block Number: 21
Acres: 0.11
Depth Footage: 75
Front Footage: 66
Zoning Code: WR3
County Use Description: IMPROVED RESIDENTIAL
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: 2
Baths: 2.0
Sq. Ft.: 960
Stories: 1.0
Lot Size: 4,785 square feet
Style: Single Family Residential
Year Built: 1923
Year Renovated: 1923
County: Monroe County
APN: 07-25-406-001-000
Home facts updated by county records on Aug 26, 2026
Around this home
Schools
Rogers Elementary School
Public 2-3 • Assigned • 0.7mi
10/10
Waterloo Junior High School
Public 6-8 • Assigned • 0.7mi
7/10
Waterloo High School
Public 9-12 • Assigned • 1.2mi
6/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
5/10 Heat Factor
7 days above 106° expected this year, 20 days in 30 years
2/10 Wind Factor
1% chance of strong winds in next 30 years
1/10 Air Factor
0 unhealthy days expected this year, 0 days in 30 years
Provided by First Street
Historical weather
Waterloo, IL • 62298
Average low and high temperatures (°F)
38
21
48
28
66
42
71
52
75
57
86
68
90
73
87
67
83
61
74
50
58
41
47
30
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun exposure
In this area, properties receive around 9.9 hours in
June and 4.1 hours in December, which is comparable to the
U.S. average for solar exposure.
9.9 hrs
4.1 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$201,000 – $243,000
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