Do You Need a Foundation for a Sunroom

Sunrooms do require building permits. … Generally, you will need a proper building foundation for your site-built sunroom, although prefab sunroom kits can sometimes be assembled onto existing patio slabs or decks.

What kind of foundation is needed for a sunroom?

The most affordable foundations are pole and beam foundations (also pier and beam foundations, or pole and beam foundations), which are most suitable for sunrooms, screened porches, and living room additions. The post and beam system is similar to the support system you would use for a deck.

Can you build an addition without a foundation?

Here’s a trick for building a small addition without paying for any foundation work—or maybe roof work either: Hang the new space off the side of the building. … Because you’ll need no foundation work, you can save about 15 percent compared with a conventional addition, says Schultz.