Welcome to Otto Rosenau!

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Local & Women Operated

Otto Rosenau is a locally owned and operated one-stop shop for construction inspection and testing needs. Our lab and office are both located in South Seattle. ORA has been in the Rosenau family since 1973 and women run since 1995. ORA has worked with everyone from homeowners to large public entities. No project is too big or too small for us to handle. For more about us check out the following pages:

  • About the company: About Us
  • About what we do: Services
  • About our accreditations, certifications, and affiliations: Qualifications

Quality Inspections for Any Project

ORA has a wide level of experience on projects from public to private, complex downtown mixed-use to residential. No project is too big or too small for us to handle. See our Projects page for more about our previous experience.

Ready for Inspections?

We would love to hear from you! If you have further questions about inspections and testing, check out this page or reach out to us here. To set up a new project or schedule an inspection, click the appropriate button below.

Otto Rosenau & Associates, Inc.

6747 Martin Luther King Jr. Way South,

Seattle, WA 98118