The cost of garage floor repair can vary widely depending on the extent of the damage, the repair method, your garage size, and local labor rates. Getting a professional consultation is the best way to get an accurate estimate for your specific situation.

• Concrete resurfacing costs $3 to $7 per square foot or $1,700 to $2,900total on average for a typical 2-car garage.
• If your existing garage floor is too damaged to be resurfaced, pouring a new concrete slab costs $4 to $8 per square foot.

Garage floors typically experience problems like cracking, sinking, settling, and surface damage. These issues can result from foundation movement, moisture, temperature changes, and years of heavy use.

Look for signs such as:

• Visible cracks
• Uneven or sinking surfaces
• Gaps between the floor and walls
• Noticeable slope or settling
• Surface deterioration

Depending on the type and extent of damage, the main repair techniques for garage floors include:

• Slabjacking (injecting polyurethane foam)
• Foundation pier installation
• Concrete resurfacing
• Epoxy coating
• Crack filling and leveling

Most professional repairs take 1 to 2 days, depending on the repair method, floor condition, size of the garage, and the specific repair techniques used. 

To prevent future damage, proper garage floor maintenance typically includes:

• Regular inspections
• Addressing cracks promptly
• Controlling moisture
• Using protective coatings
• Maintaining proper drainage around the garage

Before you hire a company to repair your garage floor, be sure to:

• Get 3 to 5 detailed estimates from reputable companies to compare.
• Hire a licensed, bonded, and insured floor repair company with several years of experience in the area.
• Read their customer reviews on trusted websites like HomeGuide and Google.
• Ask for customer references along with their contact details, and contact them for feedback about the company's work.
• Get a contract and warranty in writing before any work begins.
• Avoid making large payments up front, and don't make the final payment until the repairs are 100% complete. 

Asking some key questions can help you choose the most qualified professional to repair your garage floor:

• How many years of experience do you have repairing garage floors in this area?
• Are you licensed, bonded, and insured for this type of project?
• Will you provide me with a detailed breakdown of all the costs in the estimate?
• Are there any additional costs I should prepare for?
• What is the exact process for repair and how long do you expect it to take? 
• When will it be safe to walk on the floor after you've completed the repair?
• What is the recommended maintenance routine to prevent future damage?
• Do you warranty the repair work, and for how long?