Permitting regulation for Tiny Houses

A tiny house is a single family dwelling of maximum 400 square feet

• Tiny houses built on permanent foundations are permitted in any zones allowing detached single family dwellings
• Tiny houses built on a chassis where the suspension/axle components have been removed and the chassis permanently attached on a permanent foundation will be treated as factory-built buildings allowable only in the following zones: CR-3, CR-4, CR-5, TR, ML, SP, CB-1 and CB-2
• Tiny houses on mobile chassis are considered trailers and are only permitted in the following zones: RH, GR-1, SH, MU, CMH1, CMH2 and IR
• Tiny houses regulated by the State of Arizona shall be permitted in zones in accordance with the Arizona defined housing category

• Tiny houses shall be built and inspected in accordance with the 2018 IRC Appendix Q.
• The house can be partially or entirely built on-site or off-site. If built off-site, it needs to have been permitted by a recognized agency (jurisdiction with a code approval process similar to that of Pima County), or by an approved tiny house fabricator accredited by the International Accreditation Services, Inc., HUD, or similar organization.
• The following code adjustments shall be allowed:
  • Number of electrical circuits may be reduced to reflect loads
  • Alternative compliance with NFPA 501 for mechanical/electrical systems is recognized

• Follow the Custom Home process