My son is like that too. We are getting ECI services, as our child is behind some. What ECI recommended to us was to get your child a lap tray to use only while you are in the kitchen doing cooking,cleaning,etc... Our son will work on puzzles by himself and that's about the only thing that he will do. I got him a special puzzle and a Elmo coloring book that you use fill up the pen with water and it immediately colors the book. He played with that! When I am in the kitchen, I bring out the laptray and his puzzle and special Elmo coloring book and he will play with those things. They recommended have a few special toys just for times when you need to clean the kitchen or do laundry,etc... What does your child really enjoying doing? If he enjoys cars or coloring or doing puzzles or looking at books, get him special toys that he really would enjoy playing with.
When it is time for me to fold laundry. They suggested we get a smaller laundry basket for our child. I put my son's clothing in the basket for him and he carries his laundry basket and I move mine and we go to our den. I eventually will teach him to match his socks and fold later on down the road. Our son watches some Baby Einstein and Wiggles while I am folding laundry.
ECI recommend a small little computer for our child when we are on the computer. We got one of those for him for his birthday. This is something a child can do by himself. Consider getting one of these, we got a Fisher Price one that has music (our son loves music!), games, alphabet,etc.... It has a small miniature mouse just like Mommy and Daddy's mouse for the computer.
They recommended our child being near us when we are in the kitchen/laundry room,etc. They recommended giving him special activities just for those times. In the kitchen, you could give your child some plastic bowls with some spoons and let him do some stirring or pans and he could beat on the pans with a spoon. They do make toy bowls, food and utensils, kitchen toys specially made for kids, if you would rather him play with his own stuff.
What about the Mega blocks, does he enjoy those? If he enjoys cars, he might like a garage for the cars.
Hope this helps and good luck. I know how frustrating it can be! You don't get much done when your child doesn't want to play much by himself.