Cedric Benson's Incredible Austin House Hits Market For $4.5 Million

Cedric Benson's longtime home in Austin -- which he completely rebuilt from the ground up -- is hitting the market ... and it's got a $4.5 million price tag.

TMZ Sports has learned ... Benson bought the Texas pad back in 2006 and worked passionately to turn it into his dream home.

The finished product is amazing -- it's got 6 bedrooms, 4.5 bathrooms, pool and spa, personal gym ... and it's all sitting on top of a hill overlooking downtown Austin.

We're told it took 2 years to completely rebuild the house ... and Benson was involved in every detail of the house.

The crib is looking for a new owner who will love the place as much as the former NFL star did ... and it's currently listed for $4.5 million.