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From rustic log buildings to prominent public buildings, our staff have done it all

Over 100 Years of Experience

In the late 1800s Oliver Gonneau started crafting fine homes and cottages in Muskoka. Five generations later and we are still going strong!

Award Winning Firm

Our work has been noticed by others including the Real Estate Investment Network (REIN) who recently awarded us Renovator of the Year (Ontario).

We've Done it

From rustic log to elegant estates to multi-family buildings to prominent public buildings – we’ve worked on them all!

Turn Key Service

We are a fully equipped design and construction firm that can take your project from feasibility study, to design, to approvals, to construction and beyond.

a sketch of an office hallway

Engineering & Design Services

We give clients the solutions they need to build or renovate, ensuring that the final product will function as intended and meet standards such as the Ontario Building Code, municipal zoning regulations, etc., while being mindful of each clients budget constraints.

We can help you with:

  • feasibility studies
  • site plan approvals
  • septic & roadway designs
  • building design
  • building permit approvals
  • insurance reports
  • site or structure condition reports
  • project management for construction

We are the Gonneau Building Group


Multi-family and Retail Buildings require special attention to ensure your tenants enjoy living and working in your building.



It’s where we began. Mainland or Island we are equipped to for it all.



Whether you’re looking for an investment property or a place you can entertain from, we can help turn your dream into a reality.


We have a wide portfolio of residential and commercial projects

The Gonneau Building Group has skilled trades and projects managers experienced in commercial / multi-family / investment as well as the residential and cottage fields.

sketch of a house