If Beth is right, and I tend to think she is, then cognitive behavior therapy from a qualified professional is your best bet. Of course, the average hoarder will resist acknowledging that he or she has a problem. It might be smart for you, yourself, to seek out some help in helping your husband understand that he arguably has a problem. Yes, you can just try to get rid of the stuff, but the stuff is just a symptom, and it would likely just be replaced by more stuff. Hopefully, your situation isn't quite so dire, but I would treat it rather seriously. My mother is a hoarder. It didn't spill into the common areas of the house until she was in her late sixties, but now that it's out of the closet so to speak, I'm not sure how to help or how to help my father. She's already a pretty difficult person to deal with. I will say this; I'm not entirely sure hoarders even SEE all their stuff after a while. Denial is a powerful thing.
Good luck. I'm hoping Crankin will weigh in; she may have some insight as a mental health provider.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher