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IMPORTANT NOTE! Please be aware that a search at this site will list only those area-specific regulations that are associated with the p-suffixes, special district overlays, and demonstration project areas. Other area-specific regulations may apply to a parcel that are not part of this system. For more information about other types of area-specific regulations that might apply to your property, please contact the Permitting Department customer service at 206-296-6600.

Development Condition Search

How to use this search engine

Parcel-specific search

You may search for condition information on a specific property by using your parcel identification number. Simply enter the 10-digit parcel ID number (your tax ID number) in the ‘Parcel Identification Number’ box and click on the ‘Search’ button.

This search is powered by the Districts Report provided by the King County GIS Center. The list of development conditions applicable to the parcel is found under the "King County planning and critical areas designations" heading. Each development condition code listed will link to the full text of the condition.

Condition search

If you know the development code you may access the full text of the conditioin directly by going to the p-suffix, special district overlay, or demonstration project area page as needed. P-suffix codes take the form of a two letter code indicating the community planning area or subarea that the condition is associated with followed by a "-P" and a two digit number. Special distirct overlay codes take the form of "SO-" followed by a three digit number. Demonstration project area codes take the form of "DPA-" followed by a short description of the condition.

History and background

In 1995, King County adopted zoning classifications to implement the new zoning code (Title 21A) and the 1994 King County Comprehensive Plan. The first phase of this zoning conversion from Title 21 (the original zoning code adopted in 1963) to Title 21A carried forward existing p-suffix conditions for consideration under the new zoning code. Adopted Ordinances 12822, 12823, and 12824 completed the second and final phase of the zoning code conversion to Title 21A by repealing, replacing or converting all existing p-suffix conditions.

A p-suffix condition is a property specific development standard which has been placed on specific properties through either an area zoning process (adoption of a Community Plan for example) or by a property owner initiated rezone. P-suffix conditions increase development standards or limit uses beyond the general requirements of the zoning code. For example, a p-suffix condition may require that access to a property be taken from a specific roadway, or it may restrict the property to a specific use (e.g. a convenience store). They are referred to as p-suffix conditions because a "P" is added at the end of the base zoning classification for the property (e.g. R-4-P).

On July 28, 1997, the Metropolitan King County Council adopted Proposed Ordinances 96-260 (now Ordinance 12822), 96-261 (now Ordinance 12823), and 96-263 (now Ordinance 12824). These ordinances were the result of a comprehensive review and evaluation of all existing p-suffix conditions in relation to the new zoning code. The purpose of this review was to eliminate redundant development conditions, to simplify and clarify regulations, and to convert p-suffix conditions to Title 21A zoning with a minimum amount of change to existing regulatory standards. To accomplish these purposes, these ordinances repealed p-suffix conditions covered by the new zoning code and retained property specific p-suffix conditions that exceeded code standards.

In addition, many area-wide p-suffix conditions that exceeded code standards were replaced by Special District Overlays (SDOs) or converted to King County Code. As a result, the number of parcels with p-suffix conditions attached to their zoning classifications decreased from over 100,000 parcels county-wide to approximately 20,000 parcels. This legislation is summarized below:

Adopted Ordinance 12824 repealed existing p-suffix conditions that were covered by current code standards and retained and/or amended property specific p-suffix conditions which exceeded current code standards.

Adopted Ordinance 12822 converted existing area-wide p-suffix conditions that exceeded current code standards into King County Code Chapters 9 (Surface Water Management), 16 (Building and Construction Standards) and 21A (Zoning Code);

Adopted Ordinance 12823 replaced existing area-wide p-suffix conditions that exceeded current code standards with Special District Overlays (SDOs). Special District Overlays are notations shown on the official zoning map and are used to identify a group of individual properties (or an entire drainage basin) which is allowed or required to use alternative uses or development standards from the general provisions of the King County Code.

These ordinances do not amend the King County Comprehensive Plan, nor do they change any underlying base zoning classifications.