Fall is a great time to renovate your lawn. It's still warm enough for seed to germinate, assuming you use good quality seed. Some fast-germinating seed mixes germinate in seven days.
Why renovate your lawn? One idea is to repair dog-damaged lawn areas. Unfortunately, the family dog is very likely to abuse your lawn again. Grass can't handle the daily urine assault and burns. Unless you water the dog spot religiously. In practice this happens very rarely. People are just too busy.
But hey, why not try. Put down a thin layer of good soil. Something like turf mix. Rake it over to even it or roll it. Then overseed and water. You should have germination in 7-14 days.
Below is one home owner's renovation. Note how the new soil doesn't smother the existing turf islands. New soil is nicely raked in.
Vas Sladek, B.Sc., CLHT