Rio Rancho, NM Accessory Structures: Garage Conversions (2026)

There is no garage-conversion-specific section in Rio Rancho's Zoning Code; instead, what you build determines which rules apply. The key distinction in Section 154.03 is the kitchen: an Accessory Dwelling Unit is a complete, separate housekeeping unit with its own kitchen, while an Accessory Living Space is living space accessory to the home that does not contain kitchen facilities. If you convert a garage into a unit with a kitchen, it becomes an ADU and must comply with Section 154.70(A)(6): no more than 900 square feet or 50% of the primary structure, a lot of at least 7,000 square feet, and one extra parking space that does not block a two-car garage. Rio Rancho's residential land-use rules also cap kitchens: a second kitchen may be located in the primary residence or the ADU, but not both. A garage conversion without a kitchen is treated as accessory living space and avoids the ADU thresholds, but still must meet accessory-building standards in Section 154.70. Because converting a garage erects or structurally alters a building, a building permit is required under Section 154.81, and the work must satisfy state-administered construction codes. Removing required off-street parking can also conflict with the off-street parking requirements in Section 154.76.