Welcome to the Planning Department!


The Benton County Planning Department oversees land use, zoning, comprehensive & environmental planning within unincorporated Benton County (property outside of city limits). 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.  In addition to coming into one of our offices you can reach us at (509) 786-5612 or


The Planning Department now has TWO NEW office locations!
102206 Wiser Parkway in Kennewick
Inside the Prosser Courthouse
620 Market Street on the 1st Floor (with Public Works) 
Our phone numbers, emails and mailing address all remain the same.

Introducing the
Benton County Rural Water Supply Program

Click here to go to the Rural Water Supply Program page
Click here to see a map of the program areas 

Shoreline Management Plan Periodic Update 2021

Benton County is undertaking a periodic review of its Shoreline Master Program (SMP), as required by the Washington State Shoreline Management Act (SMA), RCW 90.58.080(4). The SMA requires each SMP be reviewed and revised, if needed, on an eight-year schedule established by the Legislature. The review ensures the SMP stays current with changes in laws and rules, remains consistent with other county plans and regulations, and is responsive to changed circumstances, new information and improved data.

For more information on this process please see our SMP Update Page.


Zoning Map!

Informational Packets:

Setbacks (The distance all improvements/construction must be from parcel lines, easements, etc.)

Accessory Dwelling Units (In some specific circumstances, ADU's, also known as mother-in-law apartments, are now allowed in the County)

Animal Unit Equivalents (Number of animals allowed per parcel in each zone)

Types of Homes Allowed (Some zones have restrictions on the types of homes allowed or how old manufactured homes can be when placed)

Fence Guidelines (Basic rules and information about fences in the County, what constitutes a fence and when you should call the Building Department)

Critical Areas Informational Handout
Geohazard Risk Assessment information
Geohazard Report Requirements


Who to call when the Planning Department can't help

Have a question about property inside City limits? You'll need to talk to that City. 
City of Kennewick (509) 585-4280
City of Prosser (509) 786-8212
City of Richland (509) 942-7794
City of West Richland (509) 967-5902
City of Benton City (509) 588-3322

 Have a question about building permits, codes or inspections?
Call the Building Department at (509) 735-3500 (option 7).

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.



Greg J. Wendt,

Planning Manager

Michelle L. Cooke,

Senior Planner

Brian Malley,

Associate Planner

Andrea Watts,

Associate Planner

Donna Hutchinson,

Office Assistant IV

April Brown,

Permit Technician

Dale Wilson,

Code Enforcement Officer

Contacting the Planning Department

Mailing Address:  

P.O. Box 910  

Prosser  WA 99350


Phone: (509) 786-5612


Email:  Planning Department


Office Locations:

620 Market Street, 1st Floor Prosser

102206 East Wiser Parkway Kennewick, WA 


Meetings and Hearings Location: 1002 Dudley Avenue, Prosser


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