Albert Barnes Commentary Ezra 5:16

"Then came the same Sheshbazzar, and laid the foundations of the house of God which is in Jerusalem: and since that time even until now hath it been in building, and yet it is not completed." — Ezra 5:16 (ASV)

Since that time even until now - Sixteen years - from 536 B.C. to 520 B.C. The adversaries of the Jews here overstep the truth; since, in point of fact, the work had been suspended for a while (Ezra 4:24).