ADU Rules in Lincoln, Nebraska

No Statewide ADU Law — Lincoln Governs Locally

Nebraska has not passed preemptive statewide ADU legislation. As the state capital, Lincoln manages its own land use through Title 27 of the Lincoln City Code (Zoning). The Lincoln-Lancaster County Planning Department administers zoning and permits for accessory dwelling units. Rules depend on your specific zoning district, so confirming your parcel's designation is the essential first step.

Zoning Districts and ADU Permissions

Lincoln's zoning code includes single-family residential districts (R-1 through R-4), urban residential, and mixed-use districts. ADUs — also called accessory dwelling units, secondary units, or carriage houses — are generally allowed as accessory uses in residential districts, subject to use standards that address size, setbacks, and design.

The area surrounding the University of Nebraska–Lincoln (UNL) campus, including neighborhoods like Near South, South of Downtown, and University Place, often includes rental housing density considerations. Some historic neighborhoods have additional design review requirements through the Lincoln Historic Preservation Commission.

Permitted ADU Types

Lincoln's code generally recognizes:

• Detached ADUs: Freestanding structures in the rear yard, such as converted garages or newly built accessory cottages
• Attached ADUs: Additions to the primary home with a separate entrance
• Internal/basement ADUs: Conversions of existing basement or internal space where habitability standards are met

Size and Setback Standards

Typical standards in Lincoln (verify current code for your district):

• Maximum ADU size: Commonly capped relative to the primary dwelling, often 600–800 sq ft or a percentage of main floor area
• Rear setback: Typically 5 feet minimum for detached structures
• Side setback: Typically 5 feet minimum
• Height: Detached ADUs generally limited to 1.5 stories or 18–22 feet
• Lot coverage: Cumulative building footprint limits apply per district

Salt Creek Watershed and Flood Zones

Salt Creek flows through Lincoln from northwest to southeast, and portions of residential areas in the floodplain are mapped in FEMA Special Flood Hazard Areas. Homeowners in these zones must:

• Obtain a Floodplain Development Permit from Lincoln Public Works & Utilities
• Meet elevation requirements based on the Base Flood Elevation (BFE)
• Comply with floodway encroachment restrictions where applicable

The City of Lincoln maintains updated FEMA Flood Insurance Rate Maps (FIRMs) through the Public Works department.

Owner-Occupancy and Rental Considerations

Lincoln's code may include owner-occupancy requirements for certain ADU configurations. Additionally, renting either the ADU or the primary unit may trigger rental registration and inspection requirements. Contact the Lincoln Finance Department's Revenue Division for rental license information.

Permit Process

1. Confirm zoning district at Lincoln's online parcel viewer
2. Review Title 27 use standards for your district
3. Submit building permit application with site plan and construction drawings
4. Floodplain review if in a flood zone
5. Schedule required inspections (foundation, framing, mechanical, electrical, final)
6. Obtain certificate of occupancy

Contact Information

Lincoln-Lancaster County Planning Department 555 S. 10th Street, Suite 213 Lincoln, NE 68508 Phone: (402) 441-7491 Website: lincoln.ne.gov/city/plan

Lincoln Building and Safety Department Phone: (402) 441-7521

Disclaimer: Zoning regulations change. Always verify current ADU rules with the Lincoln-Lancaster County Planning Department or a licensed Nebraska architect or contractor before committing to a project. This page is for informational purposes only and does not constitute legal or zoning advice.