604 399 8787 design@coasteng.ca



Coastructural Engineering Ltd. provides structural engineering services for both new construction and renovations on the British Columbia Sunshine Coast.

It is a partnership between Dean Dugas P.Eng and Lyle Seeton A.Sc.T. created shortly after they met in November 2011.

Based in Roberts Creek, Lyle had been running Seeton Structural Design since 2007 and Dean was moving from Montreal looking for an opportunity to practice structural engineering on the Coast.

Coastructural Engineering

Coastructural Engineering

It was immediately obvious that a team approach was the solution, the Coastructural name was created and a partnership formed.

Dean and Lyle share a similar background; they both spent many years as carpenters working in the construction trade before deciding to put down their tools and return to school to study structural engineering.

They also both prefer to live and work on the beautiful Sunshine Coast.



Coastructural strives to find design solutions that allow the owner and/or builder to complete their plans in the most economical and efficient manner, preserving the esthetics of the design while creating a structurally sound building.

Lyle and Dean draw on their backgrounds in both the construction trade (carpentry) and structural engineering to seek practical solutions that work for all concerned.




Lyle Seeton is an Applied Science Technologist with over twenty three years experience working in structural design.

Lyle received a degree in Mathematics from the University of British Columbia in 1981. Concurrently, he completed a carpentry apprenticeship, while living and working on the Sunshine Coast from 1975 to 1980 when he returned to school.  He received his AScT Diploma in 1982 from the British Columbia Institute of Technology.

For the next several years, Lyle worked for various Vancouver area engineering and construction supply firms, including Bianco Weiler Structural Engineers, SGB Scaffolding, and Aluma Systems. From 1994 to 2007 he worked for Weiler Smith Bowers Structural Engineers where he specialized in light commercial and residential construction.

Since 2007, Lyle has provided structural engineering for hundreds of projects on the Sunshine Coast from Langdale to Lund, including the nearby islands: Gambier, Keats, Trail, Thormanby, Nelson, Hardy, Savary.



Dean is a Professional Engineer with twelve years of experience.  He came to engineering later in life after many years as a high rise carpenter, renovator, home design and builder.  Originally a west coaster and having built his last house here on the Sunshine Coast, he attended McGill for civil engineering between the ages of 44 & 49, completing the full undergraduate program plus a Masters in earthquake engineering. He spent the next 10 years with a small firm in Montreal specializing in steel, concrete and wood commercial and industrial structures.  He is thrilled to be back on the coast and focusing on residential structures which are his passion.