Structural Engineering for Home Additions & Extensions

Engineering your home expansion: front, back, side, up.

Adding to an existing home requires the new structure to work safely with the building that's already there. Foundations, beams, columns, floor systems, roof framing and connections between the existing and new construction all need to be properly evaluated and designed.

Groupe Anthem provides structural engineering for residential additions and extensions throughout Montreal, Laval and the West Island. We develop practical structural solutions and prepare detailed engineering plans for permit and construction.

What makes Anthem different? Architectural & Structural Coordination

Groupe Anthem provides architectural design and structural engineering services, allowing the proposed layout and structural solution to be coordinated when both services are required.

This can be particularly useful for open-concept renovations, major interior reconfigurations, additions, new stair openings, enlarged openings and extensive modifications to an existing home.

Frequently Asked Questions

Still have questions? Take a look at the FAQ or reach out anytime.

Contact us for more information
Contact us for more information

  • Most home additions involve new foundations, framing, or modifications to the existing structure, which are first established as part of the architectural design. The structural engineer then develops these requirements further by designing, sizing, and specifying the structural elements needed to safely support the proposed addition.

    Working with a firm that provides both architectural and structural services allows these components to be coordinated from the beginning. This integrated approach can reduce professional fees, minimize the need to manage multiple consultants, streamline communication, and provide a more efficient, turnkey process from design through permit and construction.

  • Yes. Groupe Anthem provides residential architectural design and structural engineering services. When both are included in our mandate, the architectural and structural components can be developed and coordinated together.

  • The existing structure can be evaluated to determine how the proposed additional loads affect the building and whether reinforcement or modifications may be required.

  • Yes. Large openings in existing exterior or load-bearing walls commonly require engineered beams, columns and supporting elements to safely redistribute structural loads.

  • Yes. We prepare structural drawings and details for residential additions that can form part of the documentation required for municipal permit applications.

  • Whether you're extending the rear of your home, building a side addition or adding a second storey, Groupe Anthem can provide the structural engineering and plans required to move your project from design through permit and construction.