No, patios and decks are not included in the square footage of a home. Neither are balconies; often condo real estate agents will specify balcony square footage separately. Only interior spaces that are heated and cooled are included in square footage. Therefore, if the patio is enclosed and is of sufficient living quality as well as heated/cooled along with the rest of the home, that would be included in the square footage. Screened-in porches and garages, on the other hand, are not included in a home's square footage. In a nutshell, the following questionable spaces are NOT included:
- decks and patios, including screened in versions;
- separate out-buildings such as a detached office. unfinished basements.
Related: Are closets included square footage?