When is a permit required?
Snohomish County regulates the construction of many different types of buildings. Most structures require the applicant to submit a building permit application and site development plan. Residential building permits can be divided into four basic categories:
Single Family Residential (RK)
Manufactured Homes (MH)
Accessory Buildings (AB)
Other residential permits
When is a permit not required?
Common examples are non-habitable structures under 400 square feet in rural zones and non-habitable structures under 200 square feet in urban zones and uncovered decks constructed 30 inches or less from ground level.
Please refer to assistance Bulletin # 74 for other projects that are exempt from building permit requirements. Please keep in mind that exempt structures may not require building permits but they must still comply with distances from property lines as well as environmental regulations.