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Find Garage Conversion Contractors Near You

Garage conversions transform your existing garage into a fully functional ADU living space. They are the most affordable ADU option at $50,000–$175,000 since the structure already exists.

62,608 contractors found

About Garage Conversion

Converting a garage to an ADU is the fastest and most cost-effective path to adding living space. Most garage conversions cost 40–60% less than building a new detached unit. In California and Florida, garage-to-ADU conversions are the most popular ADU type, offering a quick ROI of 3–6 years through rental income.

Typical Cost Range

$50,000 – $175,000

Timeline

4–8 months

Garage Conversion Pros and Cons

Pros

  • +Lowest cost ADU option — uses existing structure
  • +Fastest construction timeline (4–8 months)
  • +No parking required in most California cities
  • +Quickest return on investment (3–6 years)

Cons

  • Loss of garage and storage space
  • Limited by existing garage footprint and layout
  • May need foundation upgrades for living standards
  • Less privacy than a detached ADU

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Frequently Asked Questions

How much does a garage conversion ADU cost?
Garage conversion ADUs typically cost $50,000 to $175,000, or $200–$350 per square foot. This is 40–60% less than a new detached ADU because the structure, roof, and foundation already exist.
Do I need a permit to convert my garage to an ADU?
Yes, garage-to-ADU conversions require building permits in both California and Florida. California law requires cities to process ADU permits within 60 days of a complete application.
Will I lose my parking if I convert my garage?
California law does not require replacement parking for garage conversion ADUs if you are within half a mile of public transit, in a historic district, or in a residential permit parking area. Florida regulations vary by municipality.
How long does a garage conversion take?
Most garage conversions take 4 to 8 months from permit approval to completion, making them the fastest ADU type to build.

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