• darkblurbg
    Welcome to D.G. Biddle & Associates Limited
    Consulting Engineers and Planners, Since 1973
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    Principal Fields of Specialization
    Municipal / Civil Engineering
    Land Use Planning and Site Development
    Project Coordination and Management
    Structural Engineering
    Mechanical Engineering
    Electrical Engineering
    Water Resources Management
    Environmental Noise Engineering
  • darkblurbg
    We are multidiscipline civil engineering firm providing
    an array of professional engineering services to
    private developers and government agencies.

    D.G. Biddle & Associates implements their goals allowing
    for superior results and satisfied clients.
D.G. Biddle & Associates Limited, Consulting Engineers and Planners

Established in 1973 and incorporated in 1974, D.G. Biddle & Associates Limited provides Consulting Engineering services in Southern Ontario, mainly in the Durham Region and surrounding area. The company has a staff of approximately 45, including Professional Engineers, Planners, Technicians, Administrative and Field Personnel providing Civil, Structural, Mechanical and Electrical Engineering services to both private and public clients.


  • Management of approval processes for land development projects
  • Coordination of traffic, noise, and environmental studies
  • Quantity and cost estimating
  • Liaison with regulatory approval authorities
  • Construction management
  • Official Plan amendment and rezoning applications
  • Draft Plan of subdivision and severance applications
  • Ontario Municipal Board hearings
  • Site Plan design and approval applications
  • Design of site grading and services for residential, commercial and industrial buildings
  • House siting and grading plans
  • Land use feasibility studies
  • Electronic topographic surveys
  • Design of municipal services for land development projects
  • Design of public sewer and water systems
  • Design of public roads
  • Processing of applications for municipal approval
  • Preparation of specifications and tender documents
  • Contract administration and inspection services
  • Construction survey layout
  • Transient noise generation and mitigation studies for residential developments
  • Review of building envelope for compliance with noise impact studies
  • Storm water management design and implementation studies
  • Flood control and master drainage plans
  • Erosion and sediment control design
  • Design development of Buildings
  • Preparation of working / construction drawings
  • Structural inspections and evaluations
  • Analysis of Structural Systems
  • Heating, Ventilation and Air Conditioning
  • Domestic Plumbing & Drainage
  • Process Piping
  • Sprinklers
  • Cooking Ventilation/Suppression Systems
  • Indoor/Outdoor Lighting (including Photometrics)
  • Indoor/Outdoor Power Distribution
  • Fire Alarm Systems


Larry Tracey Project Construction Manager

Robbie Larocque B.A.Sc., P.Eng.
Water Resources Manager

David Biddle B.E.Sc., P.Eng.
Structural Design Engineer
Vice President

Michael Carswell B.Eng., P.Eng.
Municipal Design Engineer

Michael Fry Senior Planner

Geoff Osborne P.Eng., MBA, LEED AP
Mechanical & Electrical Engineer

Fred Vierhout Project Co-ordinator

Company Affiliation & Memberships

  • Professional Engineers Ontario

  • Association of Consulting Engineering Companies

  • Illuminating Engineering Society of North America

  • Canada Green Building Council

  • Consulting Engineers of Ontario

  • American Society of Heating, Refrigerating & Air-Conditioning Engineers