1 Kings 9:10

It took 20 years for Solomon to finish working on the two houses the LORD's Temple and the royal palace

The foundation for the LORD's Temple was laid in the month of Ziv during the fourth year of Solomon's reign,

Later, after Solomon had finished building the LORD's Temple, the royal palace, and everything else that Solomon wanted to do,

It took Solomon 20 years to build the LORD's Temple and his own palace.

Treasury of Scripture Knowledge

And it came to pass at the end of twenty years, when Solomon had built the two houses, the house of the LORD, and the king's house,

Later, after Solomon had finished building the LORD's Temple, the royal palace, and everything else that Solomon wanted to do,

The foundation for the LORD's Temple was laid in the month of Ziv during the fourth year of Solomon's reign,

But Solomon took thirteen years to build his own palace, and finally finished it.