Decks

Do I need a permit for my deck?

A building permit is required for all decks that are more than 30 inches above the ground measured at any point within 3 feet horizontally of the deck.  For information on setbacks (how close the deck is to property line) and other regulations that may apply to your deck project, check with our Planning staff at (503) 925-2308. Even if a building permit is not required you still must meet zoning requirements. 

An additional consideration for your project is underground utilities. Always call Utility Locate number (811) at least 48 hours before you dig. 

What Do I Need to Apply?

Your application to build a deck should be submitted include the following: 
 Permit Application
 Site Plan – You will need to draw a site plan.  The site plan must show the property lines, outlines of the house and proposed deck, accessory buildings or structures (shed, pool, retaining wall, etc.) and distances between the house/deck from the property lines.
 Drawings – Decks must be designed in accordance with 2017 ORSC Chapter 5, Section R507. Decks, or elements of decks, that exceed these limits must be designed in accordance with accepted engineering practice.

Drawings should include: 
1. Elevation plans
2. Foundation plan
3. Framing plan
4. Cross section and details, including connections between members and elements used in construction (e.g.; footing to post, etc.)

Ready-build drawings can be obtained through the State of Oregon Building Codes Division website. Note the scope and limitations of use listed on the ready-build plans. 
 Clean Water Services Environmental Review.  Select the Sensitive Area Pre-screening Requirement and fill out the form.  Bring the Pre-screening letter with your application. 
 Manufacturer specifications for composite decking. 

The design of your deck should also take into account conditions which may affect your deck design such as drainage conditions, slope conditions, or decks supporting loads in excess of the standard uniform loads. Depending upon your  specific situation, you may need to hire a professional such as a contractor, architect, or structural engineer. 

Fees

The building permit fee for the deck is based on the value of work. Value of work is determined by multiplying the square footage of the deck by the current adopted International Code Council (ICC) building valuation table; currently $24.15 per square foot.  As an example, a 10 x 10 deck (valued at $2415) has a permit fee of about $113, including state tax.  There is a plan review fee, which is 85% of the permit fee.  A Planning Plot Plan Review fee of $113.55 will also be assessed.   

Occasionally circumstances will require a revision to your plans. This can happen when information provided is inadequate, incorrect, or missing.