Look at this thread first, outlining his building permit for a building he doesn't own, for some old guy he probably doesn't know: https://voat.co/v/pizzagate/1472614

Building permit Date 6th Jan 2015.

Permit PDF (search for Achilles)

And now look at this pic of the construction at Comet: https://img1.steemit.com/0x0/http://imgur.com/b8kKyZ1.jpg

97 weeks, plus 3 or so weeks for how old the screenshot is = 100 weeks.

100 weeks ago was 9th Jan 2015.

He got a permit, and used it to do heavy construction work at Comet, so there would be no evidence of the work ever taking place, but he had a permit at the time, with his business name on it, to do it...?