The modular Ministry of Magic is a modification of set 76403. It is a building placed on a 16×32 baseplate with most of the interiors from the official set arranged in a modular layout. The MOC includes a small movable platform that acts as an elevator for the building. The MOC consists of 1102 parts, of which 906 are from the official set and 196 are additional parts that need to be purchased.
You may download the extra parts list here:
01-Jul-22 Changed technic pin to technic axle (part 18651) on step 96. Very minor and does not really affect the whole build.
21-Nov-23 Updated steps 166 and 186.
22-Nov-23 Updated steps 228, 231 and 268.