Do I Need a Permit to Replace Windows or Doors in Seattle?

It depends on the scope of work:

Permit generally NOT required:

• Like-for-like window replacement where the opening size doesn't change
• Standard door replacement in an existing opening (no structural modification)

Permit IS required when:

• The window or door opening is being enlarged or structurally modified
• You're adding a new window or door where none existed
• The home is in a historic district or has specific overlay restrictions
• Work involves load-bearing wall adjustments

Seattle's energy code also requires that replacement windows meet current efficiency standards — your contractor should confirm compliance as part of the job, not as an afterthought.

When a permit is required, a good contractor handles the application on your behalf and schedules the inspection. You shouldn't have to manage that process yourself.