What demolished the Potter's house at GH?

[hambtty]

No: HPFGUIDX 145700

This has been bothering me for some time.  Then when I learned about 
the Unbreakable Vow in HBP it came to me, LV offered to make an UV 
with Snape to spare Lily Potter.  Snape did not know of the Horcruxes 
but LV knew even an UV would not kill him - he tricked Snape. Why I 
don't know for Snape was, at that time, a loyal servant to LV - that, 
I admit is a huge flaw in my theory.  But I am convinced that more 
than a deflected AK was at work that night - the power of the broken 
UV helped create VaporMort and destroyed the house.  Afterall we saw 
the AK bounce around the Ministry of Magic and in the graveyard 
without mass destruction, why then would it destroy a house?