Charles Ellicott Commentary Ezekiel 41:7

"And the side-chambers were broader as they encompassed [the house] higher and higher; for the encompassing of the house went higher and higher round about the house: therefore the breadth of the house [continued] upward; and so one went up [from] the lowest [chamber] to the highest by the middle [chamber]." — Ezekiel 41:7 (ASV)

And there was an enlarging.— The description in this verse is difficult to understand and has prompted a wide variety of opinions. The main facts are clear: that there was an increase in the width of each storey of the side chambers by the distance which the wall receded, as is expressly stated in 1 Kings 6:6; but whether there was a corresponding recession in the thickness of the outer wall of the chambers is not stated.

It is also plain that the side chambers surrounded the house, and that the two upper storeys were reached by a winding staircase (Ezekiel 40:44–49). It is impossible to enter into more detail without a careful discussion of the words in the original, the meaning of some of which is disputed.