Police say they confiscated more than 200 marijuana plants at a home on Thomas Court in Valley Cottage.
They also found enough marijuana leaves to fill 30 five-pound buckets.
Clarkstown police say they had their eye on 8 Thomas Court for months. They executed a search warrant at around 5 a.m. Tuesday.
A special unit from the state police assisted them, but they had to enter the house with special suits to ensure their safety due to the toxic levels inside the house.
Residents tell News 12 that the older couple who owned the home recently sold it or rented it.
No arrests have been made yet.