Looking for an energy auditor in Cave-In-Rock, IL? Describe your project once and up to three certified energy auditors who work in Cave-In-Rock and Hardin County get back to you with a quote. It's free and there is no obligation.
Cave-In-Rock is home to about 221 people (2024 Census Bureau estimate), a shrinking community (−3.1% since 2020). With 591 people per sq mi, it is a semi-rural area. Older homes and long heating or cooling seasons make energy audits worthwhile here.
Cave-In-Rock at a glance
- Population (Census Bureau estimate, 2024)
- 221 (−3.1% since 2020)
- Rank in Illinois
- 1,079th of 1,294 cities and towns
- Land area
- 0.4 sq mi
- Population density
- 591 people per sq mi (semi-rural)
- Type
- Village (Cave-In-Rock village)
- Main county
- Hardin County
What to check before hiring in Cave-In-Rock
- Certification: choose a RESNET or BPI certified professional.
- Rebates: in Illinois, check your utility's programs before booking: some require their own approved auditors.
- Test-in, test-out: a blower door test before and after upgrades shows the result.
- Price drivers: home size, tests included and report detail.
Useful official resources
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ENERGY STAR
Energy efficiency guidance for homes.
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RESNET
Find a certified HERS rater.
Services available in Cave-In-Rock
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Home energy audit
Whole-home assessment with blower door test and infrared scan, with a prioritized list of upgrades.
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HERS rating
HERS Index rating of a new or existing home by a RESNET-certified rater, for code compliance or programs.
Frequently asked questions in Cave-In-Rock
How much does an energy audit cost in Cave-In-Rock, IL?
It depends on the home and the tests. Describe your home: auditors who serve Cave-In-Rock reply with a quote.
How long does it take?
Usually two to four hours on site.
Will the auditor sell me upgrades?
Some do; an independent auditor gives a neutral list.
Which certified energy auditors will contact me?
Up to three independent certified energy auditors who serve Cave-In-Rock and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.