Ok, so I am not under any illusions about children and that they create mess and come with an awful lot of crap I wish I could just chuck out and never see again.
However, My child is filthy. Disgusting. I am at the end of my tether with it.
I try so hard so hard to keep my house relatively clean and tidy and now having to resort to locking rooms in order to keep them clean. My own bedroom in particular and other rooms we are not using just to keep the chaos at a minimum.
DS will leave banana peels/apple cores where ever he has finished eating them. Snotty tissues are dropped on the floor 'stuff' is thrown around every where. His room is like a landfill site. Even if I clean it he collects more rubbish, and it is rubbish, from around the house. He will pull all of his clothes out of the wardrobe and then I have to wash them again. He has peed on the floor. He tears paper to tiny pieces. Breaks all of his toys. Rips the stuffing from out of soft toys and pillows. He has his own bath towels because he will use all of them and I'm left with a ton of laundry because they end up covered in mud/pee/detritus from his room. he's taken to using loo roll for everything and throwing balls of it at the walls. Books are ripped up. I replace the carpet with a washable floor in his room and he has gouged holes in it. Its like having a huge toddler :( He also constantly lies and steals. This is just a fraction of the issues.
He is like a hoarder but worse. He will kick off at me if there is a mess! 
Now, Its worth mentioning he does have SEN/SN with sensory issues but is intellectually fine, above average, knows right from wrong. He can clean. He is very capable. He is also 8.
He is entertained daily. He would have more toys than he does but I cannot justify replacing things he constantly breaks. Boredom is not the problem. Exercise is not a problem (Its the holidays and foraging time so we are out several days a week picking fruit or in the park) we have a big garden he plays in, a scooter and bike etc to burn off energy.
Anyone have any more IDeas what to do to keep the mess down because it is making me miserable with the constant cleaning along with all his other behaviours. I feel like a prisoner in my own home because I have to lock rooms just to keep them clean and things like toiletries and loo roll have to put away too :(
Just so fed up of it all. The pros think this is just a kid thing and wont offer any decent support esp dealing with the destructive side.