From DC by Night Wiki
Unfortunately, Casper's house was destroyed in a gas fire and subsequent explosion set by his ghoul, Andres Lund, after he believed Casper to be dead and was attempting to destroy the haven while Astrid, the perpetrator, was inside. While there were no casualties, the house was damaged beyond repair, and after fleeing Casper moved into the downtown Thomas Circle Apartments.
Threads Taking Place at Casper's House
(2/1) Nordic Fog
(2/1) Shaken, Not Stirred
(2/2) A Night In
(2/3) Helping Hands
(2/3) Family Arrival
(2/3) It's a Wonderful Life
(2/3) While the Bosses Are Away...
(2/3) The One Where We Reconnect
(2/3) A Day Off
(2/3) Everything's Eventual
(2/4) Cold Front
(2/4) No Signs
(2/4) Brave or Just Stupid?
(2/4) Nesting
(2/4) The Fire: Fuck It