Dudes, that is a stock image from Dear Kids. That is not the person's room. Dear poster, It would help a lot if you showed readers the colour of the floor, trims, other furniture and even the ceiling. Too, it would be good to know what style of house you have and the other colours in your house. Why people who reply go to more bother than the person who asks the original question, I do not know.

There are plenty of tables that extend without a drop leaf. In one style (usually more modern) the extension slips under the rest of the table with a spring mechanism, making the table surface look like it has a double thickness when you aren't using it. In the other style (usually more traditional) there are leaves that can be put into the table. The latter takes more work to assemble each time you want to extend.

I found a bunch of stuff last year while dismantling my bed and cleaning under it. There was stationery, old socks, a kitchen cloth, earrings and chew toys ... all hidden there by my dog (he being tiny could access its deepest sections). He was quite disappointed that I found his stash -- I on the other hand was quite amused and happy.

The local contractor working in your area will know all about the extensions permissible by DDA. You just need to match the exteriors with the existing elevation of the building.