It was in midspring, during the fourth year of Solomon's reign, that he began the construction of the Temple of the LORD. This was 480 years after the people of Israel were delivered from their slavery in the land of Egypt.
References for 1 Kings 6:1
The Temple that King Solomon built for the LORD was 90 feet long, 30 feet wide, and 45 feet high.
References for 1 Kings 6:2
The foyer at the front of the Temple was 30 feet wide, running across the entire width of the Temple. It projected outward 15 feet from the front of the Temple.
Solomon also made narrow, recessed windows throughout the Temple.
A complex of rooms was built against the outer walls of the Temple, all the way around the sides and rear of the building.
The complex was three stories high, the bottom floor being 7 1/2 feet wide, the second floor 9 feet wide, and the top floor 10 1/2 feet wide. The rooms were connected to the walls of the Temple by beams resting on ledges built out from the wall. So the beams were not inserted into the walls themselves.