Residential building permit
What is the purpose of a residential building permit?
A residential building permit is required in unincorporated King County to construct a new residential building structure or for certain improvements to assure the development is consistent with building codes and other applicable regulations.
What activities require this permit?
A residential building permit is required for:
- A new residence, mobile home, or accessory dwelling unit
- Any accessory structures such as garages and residential storage structures (detached storage building less than 200 square feet in area are exempt)
- Improvements and additions to existing residences or accessory structures
- Decks over 30" above grade; retaining walls over 4' height; and fences over 6' in height
- Heating and air-conditioning systems, fireplaces, woodstoves and other heating devices or ventilation systems
- Relocation or demolition of a structure
- Changing the use to of a home to a daycare, adult family home or a home occupation.
A basic residential permit also is available for builders who have a previously approved registered plan and intend to construct the same house on one or more building sites (see Permitting Department Customer Information Bulletin #12A, Residential Basics Program*).
Please see related permits administered by other agencies that typically are required with a residential building permit.
How much will it cost?
Please refer to the Permitting Department's current fee schedule for an estimate.
Where can I get an application?
- Refer to the following packets for application materials:
- Request an application packet by mail by calling the Permitting Department customer service at 206-296-6600 or
- Pick up an application packet at the Permitting Department in Snoqualmie (see map and directions).
How do I submit my application?
See Applying for a permit at the Permitting Department and Drop-offs: Permits accepted by drop-off or mail*. Note that some permits can be issued over the counter. For an over-the-counter submittal, make an appointment by calling 206-296-6797.
What is the timeline for processing a residential building permit?
Varies depending on permit decision type (refer to Title 20* of the King County Code).
Notes / Comments
For more information:
Legal authority
Title 16* of the King County Code
Administered by
The Department of Permitting and Environmental Review.
Contact
For questions, please contact Permitting Department customer service at 206-296-6600.
*Note: To view PDFs, free software from Adobe is required. See helpful hints for assistance.
To request this information in alternate formats for people with disabilities, call 206-296-6600 or TTY Relay: 711.
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