Outdoor House : The Storage Room

When Sheri and I think of an RV ( recreational vehicle ) and our outdoor house, we believe that in addition to a living room/great room, an outdoor bathroom, an outdoor kitchen concept, and the RV as the environmental protection area (sleeping, cooking, and living indoor for very inclimate weather), we believe that one room that is also needed is a utility room.


The utility room is the final piece that makes the outdoor home a true home base for our RV. Its less about the idea of an extra room than it is about having the things that you have in a full size home.


We believe the room should satisfy the following needs/uses :

• A Tornado safe room - probably cinder block and reinforced.
• Full size (or bigger) refrigerator and freezer.
• Full size washer and dryer.
• Dry goods storage (food, etc.)
• Storage for other things as well.
• Secure

I'm thinking the room would need to be about 400 square foot or larger. It would be wired for the appliances and be able to be secured. 

Who "out there" has an outdoor house / home base concept that has most of the elements I've been discussing?