Destroying and Building Synagogues

Hi,

A community may not destroy its old synagogue until it has built a new one, even if they wish to use materials from the old one for the sake of the new one. The concern is that the construction project might be delayed, or the funds needed for some other cause, so that they will end up without a synagogue.

This assumes that the old synagogue was still safe for prayer; if the old synagogue was in serious disrepair or a dangerous condition then it should be demolished immediately, and a new one should be built immediately.

(Code of Jewish Law Orach Chaim 152:1)

Have a great day,
Mordechai