National Average Improvement and Repair Cost
Pro
DIY
Hours:
1
1.5
Cost:
$ 125
$ 70
Would you do this project? According to our survey, 61% of respondents preferred DIY compared to hiring a pro.

The average price to Install a Garage Door Threshold noted above is cost data to compare a contractor’s estimate with doing it yourself.
How much does it cost to install a garage door threshold? The contractor cost to install a garage door threshold is $125 vs. doing it yourself for $70 and saving 44 percent.
The constant weight of a car going in and out of a garage on the threshold of a garage breaks down the seal creating a gap where rain, snow and dirt can enter. It’s an obvious problem for any garage door but one you can solve by removing the damaged seal and replacing it with a new threshold.
You’ll find replacement thresholds sold at hardware stores, home centers and online. The material comes in a roll and is applied with an adhesive to the threshold of the garage
The job is straightforward. Pry off the old seal from the floor and clean the area so it’s free of dirt, water and oil, then apply rubbing alcohol to the surface. Unroll the weatherstripping material and apply the adhesive, then put it in place. Use the weight of the door to maintain the seal and allow the adhesive bond to the surface for 24 hours
A handyman will charge $125 to do the job, which includes labor and material. You can buy the weatherstripping and adhesive in a kit for $70 and install it and save 44 percent for your effort.
Here is a link to instructions from Storm Shield to Install a Garage Door Threshold.