de Koning Group - Civil, Structural & Architectural Engineering in Muskoka and Ontario

Based in Muskoka, Ontario, de Koning Group provides expert services to plan, design, and engineer residential, commercial, and waterfront projects across Ontario. Our team delivers professional civil engineering, structural engineering, and architectural design solutions tailored to each project’s unique site conditions and development goals.

Using advanced drafting and 3D rendering technology, we create practical, code-compliant, and build-ready designs. We specialize in custom projects of all sizes, from luxury homes, cottages, and boathouses to docks, garages, decks, and commercial developments.

To support projects from planning to construction, de Koning Group also provides Commissioner services for official project documentation and approvals, adding reliability and compliance to every step of the development process across Ontario.

Serving Muskoka, Simcoe County, the Greater Toronto Area, and beyond, de Koning Group is your trusted partner to plan, design, and engineer innovative, reliable, and precise projects from concept to completion.

PLAN

DESIGN

ENGINEER

PLAN • DESIGN • ENGINEER •

Meet the Principal

Nicholas de Koning, P.Eng - Principal

Nick graduated from Western University where he obtained a Bachelor of Engineering Science in Civil-Structural Engineering as well as a Technological Entrepreneurship Certificate.  Nick has spent his entire career specialized in Structural Engineering and is a Licensed Professional Engineer in the Province of Ontario. Additionally, Nick graduated from the Ontario Real Estate College and is a Licensed Real Estate Broker. Raised in Muskoka, Nick’s local relationships, knowledge and experience are an asset to every project.  When not working he enjoys the many outdoor seasonal activities Muskoka has to offer.

Structural Engineer

Griff Ferguson, P.Eng

Structural Engineer

Mason White, P.Eng

Structural Engineer

Tom Litchfield P.Eng

Our Team

de Koning Group has a large diverse team of over 15+ highly qualified structural & architectural designers that is continuously expanding.

Meet the Admin Team

  • Administrative Director & Commissioner for Taking Oaths (Ontario)

    Mikaela serves as the Administrative Director at de Koning Group, where she leads and oversees all administrative operations, internal coordination, and procedural compliance across the firm. As the director, she plays a pivotal role in organizational management, workflow optimization, client communications, and documentation integrity, ensuring projects move efficiently from initiation through municipal submission and approval.
    Raised on a farm in Moonstone, Ontario, Mikaela developed a strong work ethic and entrepreneurial mindset early in life. After high school, she pursued traditional goldsmithing and graduated from the Jewellery Essentials Program at George Brown College in Toronto. She further advanced her education at Georgian College of Applied Arts and Technology, earning a dual major in Jewellery Metals & Design and Business & Entrepreneurship; a combination that refined both her creative precision and operational acumen.
    Following graduation, Mikaela launched her own successful business, Relle Jewellery, while also gaining valuable legal experience working as a law clerk. Her background in business ownership and legal administration provides de Koning Group with a unique advantage in document management, regulatory processes, and client service.
    In addition to her leadership role, Mikaela is a Commissioner for Taking Oaths in Ontario, authorized to administer oaths, affirmations, and statutory declarations. This credential allows de Koning Group to streamline sworn documentation required for planning applications, permitting, and regulatory submissions, further enhancing the firm’s integrated service offering.

    Outside of the office, Mikaela can be found forging jewellery in her home studio, practicing yoga, and exploring Muskoka with friends and family - a balance of creativity, discipline, and community connection that reflects her professional approach.

  • Admin Coordinator

    Born and raised in Barrie, Ontario, Nicole graduated from Georgian College with a diploma in Business Administration - Human Resources. With a natural talent for organization and a passion for helping others, she brings both efficiency and warmth to her role as Administrative Coordinator.
    As the first point of contact at the office, Nicole ensures that every interaction is friendly and professional. She assists with daily operations, manages inquiries and phone calls, and connects clients with the right engineers to support their projects. Her approachable nature and commitment to excellent service make her an essential part of the team.

    Outside of work, Nicole enjoys spending time with her partner exploring Muskoka’s trails and breweries. An avid reader and coffee enthusiast, she’s rarely seen without a black coffee in hand.

  • Admin Assistant

    Raised in the heart of Muskoka, Leah comes from a family of entrepreneurs who inspired her drive and passion for business from an early age. Rather than taking the traditional post-secondary route, she jumped straight into the workforce to gain hands-on experience, building her career through real-world learning and a strong work ethic.

    Leah is known for her enthusiastic attitude and natural ability to connect with everyone she meets. Whether she’s working with clients, supporting her team, or embracing new challenges, she brings positivity and energy to everything she does.
    When she’s not working, you’ll find Leah exploring new destinations, trying new experiences, and finding inspiration in every adventure.

  • Nick was very receptive when I first called him about our project and agreed to take us on as clients even though they were in a very busy period. He did not let us down! He assigned one of his very knowledgeable employees to work with us. Within a few days, Mason provided us with a first draft of the design, and continued to support us during the subsequent revisions and the construction, helpfully suggesting alternatives to simplify our build. Nick was always available to finalize, approve and seal drawings and reports when they were needed to meet our deadlines. His admin staff were also wonderful! Great experience!!!

    Mireille Lepage

  • We work closely with the amazing staff at the De Koning Group for all our steel dock construction projects. Nick and his staff are always available to answer questions and they provide amazing service in an extremely timely manner. We have nothing but great things to say about all the staff, everyone is a pleasure to work with.

    Tracey Brown

  • Efficient, clear concise drawings. Excellent to work with, don't hesitate to recommend.

    Josef Hanik

  • 5 STARS...Quick and professional. highly recommended!!

    Brandon Gilpin