ADU rules in Lancaster County, NE — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Lincoln allows one accessory dwelling alongside a single-family home in the R-1 through R-4 zoning districts. It must be no larger than 40% of the main house or 800 square feet (whichever is less), have one bedroom, and the property owner must live on-site.
Under Lincoln Municipal Code Chapter 27.62 (Conditional Uses), Section 27.62.040(c), a single-family dwelling plus an accessory dwelling is permitted in R-1 through R-4 districts if the lot meets the minimum area for a two-family dwelling. The accessory dwelling may not exceed the lesser of 40% of the main building or 800 square feet, and no more than one bedroom. The owner must live on the property (in either unit), the units share utility connections, the accessory dwelling may be no taller than the main building, and one extra parking stall is required. A recorded deed restriction bars selling it separately. These are Lincoln's rules; unincorporated acreages follow the Lancaster County Zoning Resolution.
Building or renting an accessory dwelling that exceeds the size, bedroom, owner-occupancy, or deed-restriction standards of Section 27.62.040 is a zoning violation enforced by Lincoln Building and Safety.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Lancaster County's adu rules rules stack up against other locations.
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