How long did it take to build King Solomans temple?

Seven Years!

In the fourth year the foundation of the house of the LORD was laid, in the month of Ziv.

And in the eleventh year, in the month of Bul, which is the eighth month, the house was finished in all its details and according to all its plans. So he was seven years in building it. - 1 Kings 6:37,38 (NKJV)