How old are the homes in Spring Bay Township, IL?

Name: Age of homes in Spring Bay Township, IL, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

78.8% (±13.6 points) of the homes in Spring Bay Township, IL were built before 1980 (2020–2024 American Community Survey).

10.2% were built before 1940.

2.4% were built in 2010 or later.

Figures last updated on November 12, 2026.

Built before 1980: 78.8% (±13.6 points)
Built before 1940: 10.2%
Built 2010 or later: 2.4%

When the homes in Spring Bay Township were built

Housing units by year structure built, 2020–2024
Year built	Spring Bay Township	Woodford County	Illinois	United States
2020 or later	0.0% (±3.4 points)	1.1%	0.7%	2.0%
2010 to 2019	2.4% (±1.5 points)	5.6%	5.0%	9.4%
2000 to 2009	8.1% (±3.2 points)	14.0%	11.2%	13.6%
1990 to 1999	5.9% (±2.5 points)	10.1%	10.5%	12.4%
1980 to 1989	4.9% (±2.5 points)	7.1%	9.2%	12.9%
1970 to 1979	28.7% (±8.5 points)	14.9%	14.2%	14.2%
1960 to 1969	17.1% (±5.9 points)	11.1%	11.5%	9.9%
1950 to 1959	19.9% (±6.3 points)	12.1%	11.9%	9.5%
1940 to 1949	2.9% (±1.8 points)	5.7%	5.6%	4.4%
1939 or earlier	10.2% (±5.8 points)	18.3%	20.2%	11.7%

In Spring Bay Township, the share of homes built before 1980 is higher than in Woodford County (62.1%).

It is also higher than in Illinois (63.4%).

It is higher than the national figure (49.7%).

In Woodford County, Spring Bay Township ranks 8 of 32 places with a published estimate, from highest to lowest share of homes built before 1980.

Statewide, it ranks 819 of 2,751.

Rankings use the estimates alone; where margins of error overlap, neighboring ranks may not truly differ.

Why the age of a home matters: lead-based paint

Federal law treats housing built before 1978 as likely to contain lead-based paint.

Before a lease or sale of most pre-1978 housing, the landlord or seller must disclose any known lead-based paint and hazards and give the tenant or buyer the EPA pamphlet (42 U.S.C. § 4852d; 40 CFR part 745, subpart F; 24 CFR part 35, subpart A).

A contractor paid to renovate, repair or paint a pre-1978 home must be a certified firm, use a certified renovator and follow lead-safe work practices under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E) whenever the job disturbs more than 6 square feet of painted surface in a room or more than 20 square feet outside; window replacement and demolition always count (40 CFR 745.83).

Certification comes from EPA, or from the state where EPA has authorized the state to run the program.

The Census Bureau groups construction by decade, so the share built before 1978 lies between the share built before 1970 (50.1%) and the share built before 1980 (78.8%).

Homes built before 1980 in places near Spring Bay Township

Nearest places with a published estimate, compared with Spring Bay Township
Place	Distance	Homes built before 1980	Compared with this place
Spring Bay Township	—	78.8% (±13.6 points)	—
Bay View Gardens	1.5 mi	73.1% (±18.8 points)	Not measurably different
Spring Bay	2.0 mi	78.5% (±18.7 points)	Not measurably different
Richwoods Township	3.6 mi	89.4% (±10.9 points)	Not measurably different
Germantown Hills	3.7 mi	18.7% (±10.5 points)	Lower
Peoria Heights	3.9 mi	89.4% (±10.9 points)	Not measurably different
Worth Township (Woodford County)	4.6 mi	43.9% (±7.8 points)	Lower
Medina Township	4.8 mi	25.7% (±4.4 points)	Lower
Peoria City Township	5.4 mi	77.0% (±3.1 points)	Not measurably different

Nearby places with a measurably lower figure: Germantown Hills, IL (18.7%), Worth Township (Woodford County), IL (43.9%), Medina Township, IL (25.7%).

Distance is measured in a straight line between the Census Bureau’s internal points for each place.

Homes built before 1980 across Woodford County, place by place

Rank	Place	Homes built before 1980
2	Clayton Township (Woodford County)	88.2% (±17.1 points)
3	Washburn	86.2% (±13.6 points)
4 (tie)	Cazenovia Township	83.0% (±15.2 points)
4 (tie)	Roanoke Township	83.0% (±12.8 points)
6	Secor	82.9% (±19.8 points)
7	Roanoke	80.9% (±12.3 points)
8	Spring Bay Township	78.8% (±13.6 points)
9 (tie)	Minonk	78.5% (±14.4 points)
9 (tie)	Spring Bay	78.5% (±18.7 points)
11	Minonk Township	78.3% (±13.7 points)
12	El Paso	74.2% (±11.4 points)
13	Panola Township	73.9% (±47.0 points)
14	Bay View Gardens	73.1% (±18.8 points)

Showing 13 of 32 places in Woodford County, ranked from highest to lowest.

Survey years: 2020–2024 (American Community Survey 5-year estimates).

Margins of error are at the 90% confidence level.

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Questions about Spring Bay Township

How old are most homes in Spring Bay Township?

78.8% of homes in Spring Bay Township, IL were built before 1980 (2020–2024 American Community Survey).

Do homes in Spring Bay Township need a lead paint disclosure?

A home built before 1978 does, before it is rented or sold, unless an exemption applies (42 U.S.C. § 4852d); between 50.1% and 78.8% of homes in Spring Bay Township were built before then.

Does a contractor need lead certification to work on older homes in Spring Bay Township?

Yes, when the job disturbs more than 6 square feet of paint in a room or 20 square feet outside, or replaces a window: the firm must be certified and a certified renovator must direct the work under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E).

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Spring Bay township, Woodford County, Illinois

To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) for Spring Bay township, Woodford County, Illinois (county subdivision:71611, in state:17 county:203).

Each estimate (E or PE) has a margin of error beside it (M or PM).

The API needs a free key.

Request a Census API key.

DP04_0017PE, DP04_0017PM, DP04_0018PE, DP04_0018PM, DP04_0019PE, DP04_0019PM, DP04_0020PE, DP04_0020PM, DP04_0021PE, DP04_0021PM, DP04_0022PE, DP04_0022PM, DP04_0023PE, DP04_0023PM, DP04_0024PE, DP04_0024PM, DP04_0025PE, DP04_0025PM, DP04_0026PE, DP04_0026PM

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.