Can anyone recommend an outdoor cat house?

I don't know if this in the right section but here goes!
Oscar likes to go outside and sometimes I can't get him back in at night. He has a tent outside with a lovely snuggly blanket in it but it's got an open front and other cats have taken it upon themselves to pee on it
Anyway, I'd like a more secure home from home for him. I'd like one with a catflap (the other cats only spray on his tent, never go in). I'd also like to be able to put a little bed in there for him. I have googled it, and lots have appealed but I'd just like to ask you experts

IMO the cat will probably not use it, but try looking for one of those Igloo type of shelters they have for dogs.

If your cat comes in the house for dinner, why can't you keep him inside from that point and let him out during the day. Or you can build a cat run and enclosure that hooks to the house where the cat can come and go but no one can bother him.

Hiya
Thanks for the idea of the run. I know how contrary cats are, but I know he'd use it. He loves everything we've bought for him (first cat I've ever met to sleep in the beds we've bought for him and play with the toys too)!

If you do a search here for "enclosure" you'll find several types that members have created. He sounds like a wonderful cat Love to see photos

My spring project is to get something like this made. I want to be able to open my window and just let the cats go out in a play pen like this.

I went searching again, and this is more like what I want to build. Just without the floor. That way the kitties can lay on the grass.