He built the upper gate of the house of the LORD and did much building on the wall of Ophel.
There is not much more related here concerning Jotham than we had before, Kg2 15:32, etc. I. He reigned well. He did that which was right in the sight of the Lord; the course of his reign was good, and pleasing to God, whose favour he made his end, and his word his rule, and (which shows that he acted from a good principle) he...
Commenting on 2 Chronicles 27:1-9
Moreover, he built cities in the mountains of Judah,.... In the mountainous part of it, the hill country of Judea, Luk 1:65, and in the forests he built castles and towers; for the safety of travellers, and of shepherds and their flocks, see Ch2 26:10.
He built the high gate of the house of the Lord--situated on the north--that portion of the temple hill which was high compared with the southern part--hence "the higher," or upper gate (see on Kg2 15:35). He built, that is, repaired or embellished.