Looking for an energy auditor in Mount Prospect, IL? Describe your project once and up to three certified energy auditors who work in Mount Prospect and Cook County get back to you with a quote. It's free and there is no obligation.
Mount Prospect is home to about 55,460 people (2024 Census Bureau estimate), a shrinking community (−2.5% since 2020). With 5,173 people per sq mi, it is a densely built-up area. Older homes and long heating or cooling seasons make energy audits worthwhile here.
Mount Prospect at a glance
- Population (Census Bureau estimate, 2024)
- 55,460 (−2.5% since 2020)
- Rank in Illinois
- 23rd of 1,294 cities and towns
- Land area
- 11 sq mi
- Population density
- 5,173 people per sq mi (densely built-up)
- Type
- Village (Mount Prospect village)
- Main county
- Cook County
What to check before hiring in Mount Prospect
- 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 Mount Prospect
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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 Mount Prospect
How much does an energy audit cost in Mount Prospect, IL?
It depends on the home and the tests. Describe your home: auditors who serve Mount Prospect 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 Mount Prospect 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.