Omaha, NE Accessory Structures: ADU Rules (2026)
ADU rules in Omaha, NE, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- Max ADU size
- 500 sq ft gross floor area
- ADUs per site
- One only
- Permit needed
- Conditional use permit in most districts
- Detached ADU setback
- 20 ft behind principal dwelling
- Additional parking
- Not required for the ADU
Summary
Omaha allows one accessory dwelling unit per residential lot, but most base districts require a conditional use permit before you build.
An ADU in the AG, DR, R1, R2, R3, R4, LO, GO, LC, CC and GC district requires approval of a conditional use permit subject to the procedure and criteria set forth in section 55-883...No more than one ADU shall be allowed per site...The accessory dwelling unit shall not exceed 500 square feet in gross floor area...A detached ADU shall be placed a minimum of 20 feet behind the front facing plane of the PDU.
Full Breakdown
Omaha's zoning code (Sec. 55-763(a)) permits detached, attached, or internal accessory dwelling units on sites with an approved residential use. In the AG, DR, R1, R2, R3, R4, LO, GO, LC, CC and GC districts, an ADU needs a conditional use permit under Sec. 55-883 before it can be built; it's allowed outright in the R5, R-WRN, R6, R7, R8, MH, NBD, CBD, DS and TOD districts. Only one ADU is allowed per site, it can't be sold off separately from the main house, and a detached ADU must sit at least 20 feet behind the front of the principal dwelling and 5 feet from the side/8 feet from the rear lot line (3 feet is allowed if utility companies confirm no easement conflicts).
Violations & Fines
Building an ADU without the required conditional use permit, or one exceeding the 500 sq ft cap or setback limits, is a zoning code violation subject to the city's standard zoning enforcement process and can hold up a certificate of occupancy.
Frequently Asked Questions
Do all Omaha lots allow an ADU by right?
Can I sell the ADU separately from my house?
Sources & Official References
Other rules in Omaha
How Omaha compares: Easiest Cities to Build an ADU·Compare Omaha to another location·View the Nebraska accessory structures overview
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