Skip to main content

We are happy to announce the sale of Urban Cottage to Seattle custom contractors Hass Development and Construction. For the past 3 years the team at Haas Development and Construction has been the exclusive custom contractors for all Urban Cottage ADU/DADUs projects, so they will take over both existing and new projects seamlessly. From permit to build the team at Haas Development and Construction will help you realize your Seattle accessory dwelling unit!

Getting Started with your ADU/DADU

If you are planning an accessory dwelling unit (ADU), or detached ADU (DADU) project in the Seattle area, reach out to our team to get started. Our custom contractors at Haas Development and Construction are ready to join your project wherever you are in the process.

To learn more about ADU projects, permits, or builds give us a call at (206) 494-3369 or reach out via email to

Haas Development and Construction Team


  • This field is for validation purposes and should be left unchanged.