In unincorporated Maricopa County, decks not more than 30 inches above grade are generally exempt from building permits. Elevated decks, covered patios (ramadas), and attached patio structures require permits. Setback and lot coverage requirements apply to all outdoor structures.
Under Maricopa County's adopted building code, decks and platforms not more than 30 inches above adjacent grade at any point and not over any basement are exempt from building permits. Elevated decks over 30 inches require permits with structural engineering, guardrails (at least 36 inches), and inspections. Covered patios, ramadas, and shade structures attached to the house are considered additions and require building permits. Detached shade structures under 200 square feet with no utilities may be exempt. Patio covers must comply with setback requirements (same as the primary structure in most zones). In the desert, ramadas and covered patios are popular — aluminum and wood shade structures are common. At-grade patios (concrete, pavers, flagstone) generally do not require permits unless they affect drainage or are part of a larger project. Swimming pool-adjacent patios may need to comply with pool barrier regulations.
Unpermitted elevated decks or covered structures may result in stop-work orders, required engineering review, and after-the-fact permit applications with potential additional fees.
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