John Gill Commentary 1 Kings 7:1

"And Solomon was building his own house thirteen years, and he finished all his house." — 1 Kings 7:1 (ASV)

But Solomon was building his own house thirteen years He made more haste with the house of God than with his own, for that was but seven years in building; which showed greater regard to the honour of God than to his own glory, or even convenience; nor was this built till after that:

and finished all his house ; or houses he undertook to build, the singular for the plural; even the house of God, his own palace, and that for the daughter of Pharaoh, and that which is next mentioned, which were in all twenty years building, (1 Kings 9:10) .