And what does your ”Carriage House” look like? Is it plumbed and has living quarters? Are you just meaning replace the furniture? If so, what’s there & what’s needed? ”Withstand dogs” - are we talking massive size dogs or massively shedding coated dogs?

I trained my dogs not to get up on furniture, but if I had regular guests with untrained dogs, I would use the sofa covers from Orvis. We have several of their dog beds for 10 years, wash them regularly and they still look like new.

https://www.orvis.com/dogs/furniture-protectors-throws/furniture-protectors

Also get upholstered furniture made with indoor/outdoor or Crypton/Sunbrella fabric.