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Seattle passes new rules for accessory dwelling units

On July 1st, the Seattle City Council approved new legislation regarding the constructions of accessory dwelling units in the city.

The new law removes off-street parking requirements and also:

  • Allows both attached and detached dwelling units in single-family zoning
  • Introduces floor to area ratio limits in those single-family areas
  • Removes the previous owner-occupancy requirements for construction
  • Increases the maximum square footage from 800 to 1,000 square feet
  • Adds more flexibility in maintaining existing trees
  • Requires a demographic survey from future ADA/DADU owners and occupants

Here are two informative articles to learn more about these new changes to Seattle ADA/DADU regulations:




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Jill McCormick

My goal is to make your real estate experience as pleasant, and profitable as possible. I accomplish this by anticipating your needs, applying my experience to your specific situation, paying attention to all the details of the transaction to ensure a smooth closing, and follow through on all items that are important to you to ensure that your needs are met.