Welcome to the Benton County Planning Department! The Planning Department oversees land use, zoning, comprehensive & environmental planning within unincorporated Benton County (property outside of city limits). 

If you have questions about property inside city limits, please contact the respective city. 

Kennewick (509) 585-4280
Prosser (509) 786-8212
Richland (509) 942-7794
West Richland (509) 967-5902
Benton City (509) 588-3322

Some of our most frequently asked questions are about zoning, land use rules (such running a business from your home), setbacks from property lines, and addresses.  We are happy to answer any of your land-use related questions.  

Have a question about building permits, codes or inspections?
Call the Building Department at (509) 735-3500 (option 8)

Have a question about Code Enforcement?
Call Code Enforcement at (509) 222-2301 or fill out the Request for Investigation form

Have a question about wells and septic systems?
Contact the Benton Franklin Health District at (509) 460-4205

Have a question about ownership of property?
Contact the Benton County Assessor's office

Have a question about property taxes? 
Contact the Benton County Treasurer's Department

Want a copy of your Short Plat, Long Plat or other documents? 
Contact the Benton County Auditor's Recording Department

Want a map created and/or printed for you?
Contact the Benton County GIS Department


Any information submitted to Benton County is subject to the public records disclosure laws for the state of Washington (RCW 42.17) and all other applicable laws that may require the release of the documents to the public.


Department Info.

Physical Address: 

1002 Dudley Avenue

Prosser, WA 99350

Mailing Address:
P.O. Box 910

Prosser  WA 99350

Phone Number:


Department Email

Jerrod B. MacPherson,

Planning Manager


Clark A. Posey,

Assistant Planning Manager


Greg J. Wendt,

Principal Planner

Michelle L. Cooke,

Senior Planner



Benton County    620 Market Street    Prosser, Washington 99350
Phone: (509) 786-5710 or (509) 783-1310
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