Garage Construction & ADUs Cost Guide — Chicago, IL

Verified 2025 pricing for garage construction & adus services in Chicago. Updated quarterly from local contractor data.

Service Cost Ranges

Service	Low	Average	High	Unit
Detached Garage Construction	$26,000	$58,500	$130,000	per project
ADU / Garage Apartment	$78,000	$156,000	$325,000	per project
Carport Installation	$5,200	$11,700	$32,500	installed

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Older housing stock (pre-1952) increases complexity and materials cost

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High provider competition keeps pricing competitive vs national averages

✓Get at least 3 quotes

✓Ask about seasonal discounts

✓Bundle multiple services

✓Check for manufacturer rebates

✓Verify license before hiring

See who offers the best value for money in Chicago.