Everything homeowners ask about building an ADU in Albuquerque — answered with 2026 data.
Yes, ADUs are allowed in R-A, R-1, R-T, and R-ML residential zones (casitas by-right since the 2023 Housing Forward ABQ IDO update) in Albuquerque, NM. The maximum size for a detached ADU is 750 sq ft (650 sq ft and 18 ft height in the Downtown CPO-3 overlay). Attached ADUs can be up to 750 sq ft (attached ADUs follow the same casita standards). Albuquerque has an ADU-friendliness score of 7/10. Check our full Albuquerque ADU rules page for complete zoning details.
ADU construction in Albuquerque typically costs $120,000-$240,000. The cost per square foot averages $160-$320. Garage conversions are more affordable at $60,000-$130,000, while prefab ADUs cost $80,000-$170,000. Permit fees add $2,500-$5,000 (valuation-based) - Confirm with ABQ Planning to your budget. See our detailed Albuquerque ADU cost guide.
Detached ADUs in Albuquerque can be up to 750 sq ft (650 sq ft and 18 ft height in the Downtown CPO-3 overlay). Attached ADUs are limited to 750 sq ft (attached ADUs follow the same casita standards). Junior ADUs (JADUs) have a cap of Not a separate category in Albuquerque's IDO. Maximum height is Cannot exceed the height of the main house (18 ft cap in Downtown CPO-3) - Confirm with ABQ Planning. You are allowed up to 1 casita per lot in R-A and R-1 zones; casita may cover max 25% of combined side + rear yard on a qualifying lot.
Rear setback: 5 feet minimum. Side setback: 5 feet minimum (corner lots: same street-side setback as the main house). Front setback: Casita must sit behind the rear wall of the main house. Note that garage conversions may be exempt from setback requirements if the existing structure is already within the setback area.
1 off-street parking space required. Many cities and states have been relaxing ADU parking requirements in recent years. In California, no additional parking is required for ADUs near transit.
Not required. Note that owner-occupancy rules vary by state law — California and several other states have eliminated this requirement for standard ADUs.
The ADU permit review timeline in Albuquerque is typically 6-10 weeks (faster with the city's pre-approved casita designs). Plan check: 3-6 weeks. Pre-approved plans availability: Available - the city publishes pre-approved casita designs under Housing Forward ABQ.
Average ADU rental income in Albuquerque: 1-bedroom units rent for $1,100-$1,400/month, 2-bedroom units for $1,300-$1,700/month. Short-term rentals: Allowed with a city short-term rental permit. Expected ROI: 6-8% annual return.
The minimum lot size for an ADU in Albuquerque is None citywide (exception: 7,000 sq ft minimum in R-1 within the Sawmill/Wells Park CPO-12 overlay). This applies to detached ADUs — garage conversions and JADUs may have different or no lot size requirements.
Garage conversions are one of the most popular and affordable ADU options. In Albuquerque, a garage conversion typically costs $60,000-$130,000. The key advantages are lower cost (no foundation work), potential setback exemptions, and faster permitting. Read our complete garage conversion guide.