Legally, I can build a deck no higher than 1 foot 11.5 inches high with no permit needed. So, I plan on building one that has a step then the deck. The deck will support a hot tub. Any tips on building this? I already have a deck, 8x8, 4 feet high. I plan to surround this existing deck with my new deck. To avoid wasting lumber, how tall of a new deck should I build so that the existing stairs work. without much modification?