Creative and innovative engineering services of uncompromising excellence.

Need a Plumbing Retrofit?

We design plumbing retrofits for residential buildings.

We at Douglas Engineering are committed to living with the highest degree of personal integrity. We will support each other in personal and professional growth. We will be accountable for all of our interactions. Through diligent application of our talents, we will provide creative and innovative engineering services of uncompromising excellence.

For all your engineering needs big or small,
we can help create innovative solutions.

Fire Life Safety

We conduct fire and life safety evaluations for residential buildings in accordance with Honolulu Ordinance 19-04 (formerly 18-14).


Douglas Engineering has delivered electrical, mechanical, and plumbing consultation with service and integrity since 1992.


We offer not only technical expertise but strong project management.

Testimony & Litigation

We also offer engineering consultation litigation support and expert testimony.