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we open doors

ASI is your doorway to accessibility. We open up worlds—universally designed worlds—that are inclusive to all.”

– David Borthwick, President

what we do

We open doors to help people overcome physical and cognitive challenges. Through everything from accessibility assessments and reports to accessible design and construction project management, we open up worlds—universally designed worlds—that translate into maximum independence, mobility, and safety.

And our doors are open to everyone whether spinal cord or orthopedic injuries, acquired brain injuries, amputations, cognitive impairments or age-related mobility issues. The insurance industry, legal community, and private and public sectors rely on us to tear down barriers to help their clients move forward.

But there’s no going it alone—effective solutions require teamwork. Each ASI professional brings a distinct skill set—architectural design, rehabilitation, and costing expertise—so that each project benefits from all perspectives.

This synergy is ASI’s team approach—an approach that makes the best match between abilities and barrier-free solutions. We invite you to take a peek behind the ASI doors and see why insurers, lawyers and private and public sector organizations choose ASI…


Established in 1996
Over 3,500 accessibility projects across North America

Strict adherence to standards

Ontario Building Code Standards
Universal design principles and best practice guidelines

Multi-disciplinary credentialed consultants

Construction Engineer Technologist
Senior Registered Architect
Occupational Therapist
Qualified Quantity/Cost Estimator
Structural and Mechanical Engineers

Experts in barrier-free design principles

National Standard of Canada-CAN/CSA-B651-12

Extensive geographic coverage

Network of regional consulting architects
Over 3,500 assessments across North America

Superior quality assurance

Accessibility Checklist
Functional Abilities Information Capture Form

Impartial, expert opinions guaranteed

Professional compliance with governing body standards of practice

Comprehensive liability coverage

ASI professional liability insurance
All trades carry extensive coverage

Exceptional customer service

ASI service standards supervised by our Director of Operations & Customer Service

our team

David Borthwick
ASI President

Each project is overseen by ASI’s President, David Borthwick, trained as a construction engineer technologist and real estate agent, who founded ASI in 1996. That’s twenty years of accessibility experience; that’s a lot of projects—in fact, over 3,500 accessibility projects across North America. Additionally, David was appointed by the Ontario Minister of Community and Social Services to the Accessibility for Ontarians with Disabilities Act 2005 initiatives—Accessibility Standards Advisory Council of Ontario and the Accessible Built Environment Standards Development Committee. David was also appointed to the Town of Oakville Accessibility Advisory Committee. He is recognized by the Ontario Provincial Court as an Expert Witness regarding accessibility …Impressive.

David on linkedIn

Wayne Parson
ASI Senior Architect Consultant

All home modification recommendations and designs are developed by ASI’s Senior Architect Consultant, Wayne Parson who is a Registered Architect with the Ontario Association of Architects. But he’s not just any architect; as you can imagine he’s accessibility-obsessed. He’s our in-house AutoCAD expert and “go to guy” for everything design. Favourite Books: The Ontario Building Code, the National Standard of Canada CAN/CSA-B651-12, and Accessibility Design for the Built Environment.

Susan Campbell
Director of Operations & Customer Service

All reports must adhere to ASI’s internal processes overseen by Susan Campbell, ASI’s Director of Operations and Customer Service. Susan’s rehabilitation background combined with a keen eye for detail—not to mention her strict commitment to deadlines—means that all ASI reports are of top quality (trust us, if a report doesn’t pass the “Susan-test,” it doesn’t leave the office).

in business


Cities and towns
worked in

Tim Hortons
…too many
to count