Las Cruces, NM Accessory Structures: Shed & Carport Rules (2026)
Shed permit rules in Las Cruces, NM, also referred to as storage shed, backyard shed, or accessory building regulations, set size limits, setbacks, and when a building permit is required.
Key Facts
- Shed exemption threshold
- ≤120 sq ft, one story
- State rule
- NMAC 14.5.2.9(B)(1)
- Local mirror rule
- LDC § 30-201(11)
- Retaining wall exemption
- ≤36 in. fill, ≤6 ft. height
- Zoning setbacks
- still apply to exempt sheds
Summary
A detached backyard shed in Las Cruces skips a building permit only if it is a one-story accessory structure of 120 square feet or less, under New Mexico's statewide permit-exception rule at NMAC 14.5.2.9(B)(1), which Las Cruces enforces as part of its adopted residential code. Larger sheds and most other accessory structures need a full building permit.
14.5.2.9 EXCEPTIONS TO REQUIREMENT FOR PERMITS: Permits shall not be required for the following: ... B. Residential: See section R105 of the IRC except as provided below: (1) Section 105.2 (1) - One-story detached accessory structures provided that the floor area does not exceed 120 square feet (18.58 m2). ... (3) Section R105.2 (3) - Retaining walls that retain less than 36 inches (915mm) of unbalanced fill, and have a total height equal to or less than six feet from top of wall to bottom of footing. Retaining walls supporting a surcharge load or impounding class I, II, or III-A liquids are not exempt from permit.
Full Breakdown
2. 58 m2)' from needing a building permit at all. Las Cruces enforces this exact threshold locally: Land Development Code Section 30-201(11) exempts 'one-story detached accessory buildings used as tool and storage sheds, playhouses, and similar uses, provided the floor area does not exceed 120 square feet,' and Section 30-201(12) separately exempts minor structures like doghouses under four feet by four feet and three feet tall. The same state rule, Subsection B(3), also exempts retaining walls holding back less than 36 inches of unbalanced fill with a total height of six feet or less from top of wall to footing, though walls supporting a surcharge load or impounding hazardous liquids are never exempt.
A shed over 120 square feet, a shed with power or plumbing connections, or a shed used for anything beyond tool and storage use loses the exemption and needs a permit under Section 30-171 like any other structure. Exemption from the permit does not excuse compliance with zoning setbacks; Section 30-201's closing paragraph states that exemption from building-permit requirements is not authorization for work that otherwise violates the Code, so a shed still must clear the applicable district's accessory-structure setback under the zoning chapter.
Violations & Fines
Building a shed over the 120-square-foot exemption without a permit, or building any exempt structure in violation of zoning setbacks, exposes the owner to a petty misdemeanor charge under Section 30-141 and Section 1-10: a fine up to $500.00, up to 90 days in jail, or both, with each day of a continuing violation charged separately. The building official can also order the structure altered or removed to bring it into compliance with the underlying zoning district standards.
Frequently Asked Questions
Do I need a permit to build a backyard shed in Las Cruces?
Can I put an exempt shed anywhere in my yard?
Are small retaining walls also exempt from a permit?
Sources & Official References
Other rules in Las Cruces
How Las Cruces compares: Shed Permit Requirements by City·Compare Las Cruces to another location·View the New Mexico accessory structures overview
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