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Planning & Development

Posted on: February 3, 2021

Linn County Announces Changes to Unified Development Code and Building Division Service Area

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The Linn County Planning and Development Department announces the following updates that are now in effect:

Unified Development Code

The Linn County Board of Supervisors today approved an amendment to the Unified Development Code. The significant change in the amendment includes changes to sizing regulations for detached accessory structures. The size of allowable detached accessory structures will be increasing for most lots, as shown in the table below, and a new size category will be created for lots with 1.00 acre or less. This change is in response to increasing customer demand for larger accessory structures.  

Lot Size in AcresAll districts except AG, CNR, and MH
1.00 or less1,200 square feet of floor area
1.01 to 1.991,500 square feet of floor area
2.00 to 4.992,000 square feet of floor area
5.00 to 9.992,800 square feet of floor area
10.00 or greater4,200 square feet of floor area


View Linn County's Code of Ordinances.

Building Permit & Inspection Services Expanded to Ely and Springville

The Linn County Building Division has added the cities of Ely and Springville to its service area for building permits and inspections. All building permits and inspections in these cities are now handled through Linn County. This brings the total number of cities under contract with Linn County to seven, which includes Alburnett, Bertram, Center Point, Ely, Lisbon, Mount Vernon, and Springville. For more information about the Linn County Planning & Development Building Division, visit LinnCounty.org/Planning or email [email protected] or call 319-892-5130.  

Building permit applications can be completed online


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