Looking for an addition contractor in Hainesville, IL? Describe your project once and up to three addition contractors who work in Hainesville and Lake County get back to you with a quote. It's free and there is no obligation.
Hainesville is home to about 3,532 people (2024 Census Bureau estimate), a stable community (−0.4% since 2020). With 1,913 people per sq mi, it is a suburban area. Growing families here often add space instead of moving.
Hainesville at a glance
- Population (Census Bureau estimate, 2024)
- 3,532 (−0.4% since 2020)
- Rank in Illinois
- 394th of 1,294 cities and towns
- Land area
- 1.8 sq mi
- Population density
- 1,913 people per sq mi (suburban)
- Type
- Village (Hainesville village)
- Main county
- Lake County
What to check before hiring in Hainesville
- Zoning: check Hainesville's setbacks, lot coverage and height limits first.
- License and permit: in Illinois, additions are built by licensed contractors under a permit.
- Structure: second stories need an engineer to check the existing house.
- Price drivers: size, foundation, roof tie-in, plumbing and finishes.
Useful official resources
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ICC: International Code Council
Official information and guidance.
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NAHB
Official information and guidance.
Services available in Hainesville
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Room addition
Ground-floor addition with foundation, framing, roof and finishes.
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Second-story addition
New floor over the existing house, with structural engineering.
Frequently asked questions in Hainesville
How much does an addition cost in Hainesville, IL?
It depends on size, foundation and finishes. Describe your project: contractors who serve Hainesville reply with a quote.
How long does it take?
Often a few months, plus design and permits.
Does an addition raise property taxes?
Usually, since it increases the assessed value.
Which addition contractors will contact me?
Up to three independent addition contractors who serve Hainesville 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.