Maximum Legal Width for Tiny House Trailers What Tiny House Deck Width Should You Choose? The maximum width allowed on public roads without requiring oversized permits is 8 ft 6 in (102”), excluding tires. Anything wider than 102” will require an oversized permit from each state you travel through. Permit costs typically range from $14 to $50 per day, and some states offer annual … Continue reading What deck width should I choose for my trailer?