30 years building for Toronto's most
visionnary architects.

We speak two languages fluently. We understand architects: their design intent, their creative vision, and the precision of their drawings. But we also bring decades of field expertise: anticipating challenges before they arise, navigating market realities, and understanding the true cost and complexity of materials and methods. This rare combination allows us to translate ambitious designs into built masterpieces, transforming drawings into structures that honor the original vision while respecting the client's investment.

Work with us

Featured Projects


Composed of varying patterns of a brick module, a new midtown Toronto house has been wrapped in a sinuous brick skin, with openings in sculpted panels of white oak.

Design: Partisans


The classic single family, three storey brick Toronto house, reinterpreted by Superkul Architect. The new building and landscape design engage the street with the carefully scaled elevations creating a solid and inviting presence in the neighbourhood.

Design: Superkul Architects


This house is a dual-structure residence that begins with an unlikely premise: two former commercial buildings, side by side. One demolished and rebuilt entirely, the other reduced to its original brick skin and rebuilt from within.

They meet in the middle through a glass courtyard, an unexpected green space that reframes the entire experience of the house.

Design: LGA Architects

Who we work with

Agathom Co.
Superkul Architect
Gary Lichtblau Architect
AKB / Atelier Kastelic Buffey
Ian Macdonald Architect

Partisans
Anna Voineskos Architect
Gillian Green Architect
Robyn Clarke + Co
Shim Sutcliffe Architects

Connie Braemer Design
Natale and Scott Architects
Sarah Richardson Design
Jerome Markson Architect
Meredith Heron Design

Let’s build.

Whether you are an individual looking for the company you will entrust with the building of your project or an architect in the search of the contractor who will execute your design with dedication and precision, Duffy & Associates delivers the optimal integration of ideas with uncompromising quality and the commitment to build well, once.

About

Services

+ New Build
+ Renovation
+ Reconstruction
+ Restoration

Location

349 Carlaw Avenue Toronto
Suite 302

Awards

Duffy & Associates is a Tarion Registered Builder

Winner of Toronto Urban Design Awards, Award of Merit for our Scollard Project

WoodWorks Award, Pointe Cabin

Winner of Best of Houzz 2016 for Client Satisfaction