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ADUs are allowed in Unincorporated Doña Ana
Types:DetachedInternal

Accessory Dwelling Unit (ADU) Rules for Unincorporated Doña Ana, NM

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# of Properties
17,060
Owner-occupied
64%
Zoning districts
39
Avg Home Value
$183,228
Median Lot Size
0.98 acres
Avg Income
$67,497
Residential Types:
17,060 housing units
Other
100%
Zoning Districts:
41,004 parcels · 39 districts
T3
23%(9,314)
D1-L
19%(7,726)
D1
10%(4,260)
T2
10%(4,060)
Other
38%(15,644)

ADU Rules

What can you build in Unincorporated Doña Ana, NM?

Unincorporated Doña Ana, NM follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.

Interior / Attached ADU Size Limits

  • –Internal ADUs are not allowed in zones D3, MU, C1, C2, C3, I1, I2, or I3 (maximum size is 0 sq ft).
  • –Maximum internal ADU size of 1,800 sq ft in the T2 zone.
  • –Maximum internal ADU size of 1,800 sq ft in the T3 zone.
  • –Maximum internal ADU size of 800 sq ft in the D2 zone.
  • –Maximum internal ADU size of 800 sq ft in the Low Intensity (L) development intensity.
  • –Maximum internal ADU size of 1,250 sq ft in the R development intensity.
  • –For an internal in-home apartment, the maximum habitable area is 1,250 sq ft or 30% of the principal dwelling’s floor area, whichever is greater (applies where no zone-specific cap applies).
  • –Maximum internal ADU size of 1,800 sq ft in the D1 zone; special use permit required.
  • –Maximum internal ADU size of 1,800 sq ft in the R5 or R5L zones; special use permit required.

Detached ADU Size Limits

  • –Maximum of 1,800 sq ft for a detached ADU in T2.
  • –Maximum of 1,800 sq ft for a detached ADU in T3.
  • –Maximum of 800 sq ft for a detached ADU in D2.
  • –Maximum of 1,250 sq ft for a detached ADU in R (Rural Development Intensity).
  • –Maximum of 800 sq ft for a detached ADU in L (Low Intensity).
  • –Maximum of 1,250 sq ft or 30% of the principal dwelling, whichever is greater, for a detached ADU in M (Medium Intensity).
  • –Maximum of 1,250 sq ft or 30% of the principal dwelling, whichever is greater, for a detached ADU in H (High Intensity).
  • –Maximum of 1,800 sq ft for a detached ADU in R5; a Special Use Permit is required.
  • –Maximum of 1,800 sq ft for a detached ADU in R5L; a Special Use Permit is required.
  • –Maximum of 1,800 sq ft for a detached ADU in D1; a Special Use Permit is required.

What's allowed on your lot?

These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.

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Is your property eligible for an ADU?

ADU rules in other New Mexico municipalities

Rules change at the town line. Check the municipality your property is actually in.

Doña Ana County

Las Cruces
See all municipalities in Doña Ana County →See all New Mexico municipalities →
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