Wa `alaykum as-salamu wa rahmatullahi wa barakatuh.
As to Heaven; the prophet (peace be upon him) said: Ask Allah Al-Firdaws, for it is the fine part of Heaven and the higher level of it and it is under the Throne of Allah.” (Al-Bukhari)
In another Hadith, we know that in the trip of Al-Isra’ and Al-Mi`raj the prophet (peace be upon him) went through the 7 skies until he reached the Throne of Allah. Se we can say, according to text it is under the Throne and over the 7th sky.
As to Hell, it is as Allah said: {surely the Book of the wicked is locked up in the depths of Sijjeen} and Sijjeen in the lower level of earth. And to that most of the scholars concluded that Hell is inside earth.
Keep in mind that Allah said that at the Day of Judgement both earth and sky will be changed and reshaped. {Warn them of the Day when the Earth and the Heavens shall be totally transformed.} 14:48 So no one can claim exact status of how it will be for it is of the world of Al-Ghaib.
Almighty Allah knows best.
Views expressed by hosts/guests on this program (live dialogue, Facebook sessions, etc.) are their own and their appearance on the program does not imply an endorsement of them or any entity they represent.