Absolutely. I haven't been told the final costs of the renovations yet but from what I've heard, they had to completely rip out everything from the room you can see in the background to get rid of the (lead-contaminated) soot.

Also, it was pure luck that everyone got out unharmed. I rent that place twice every year to spend a couple of days with friends who live all over Germany. One of them had all his stuff in the room behind the fire. The only reason he hadn't been in there when the battery exploded was that the night before he hadn't slept well on his air mattress and had moved to a couch upstairs. The room has a fire exit but depending on how fast he would have woken up, he might not have found it through the dense smoke.