Custom Home Renovations & Builds. Based in Northumberland County, Ontario.

Residential Construction with a Difference

We build collaborative relationships with our clients, and design & trade partners in order to renovate and build truly custom homes while delivering personalized, transparent service, with a focus on the highest quality.

Service from Concept to Completion

Whether you’re planning a renovation, an addition, or a new build, de Blois Built provides exceptional service all the way from planning and preconstruction, through to project completion. Our dedicated team is devoted to quality, care, and precision every step of the way.

Preconstruction First

Every successful project begins with honest numbers and a realistic scope before construction begins.

Practical Problem Solving

No two projects are exactly alike, and neither are the challenges behind them. We find solutions that work on site and on budget.

Precision Execution

Great results only happen when every detail is managed with care. We oversee every phase from groundbreaking through final finishes.

Beautiful Homes, Meaningful Connections

Your home should reflect your lifestyle, your priorities, and the way you want to live every day. At de Blois Built, we bring together 20 years of construction expertise, rigorous preconstruction planning, and a commitment to quality that runs through every phase of your project.

Whether you are reimagining an outdated home, expanding with a custom addition, or building from the ground up, our team guides every step with care, clear communication, and genuine accountability. The result is a smoother process, fewer surprises, and a finished home that is built to last and built around you.

Services

Complete Residential Construction, Start to Finish

We offer a full range of residential construction services for homeowners who value quality, clear communication, and work that is built to last.

Why Choose Us

Built on Quality, Clarity, and Trust

Homeowners choose de Blois Built because they want more than a contractor. They want a team that understands the importance of detail, communicates clearly, and takes pride in providing exceptional service at every stage.

We approach every project with a commitment to craftsmanship, careful management, and genuine collaboration. From preconstruction planning to final finishes, we focus on delivering a process that feels organized and a result built to the highest standard.

Start with a Conversation. Let's Build Something Exceptional

If you are planning a renovation, addition, or custom home in Northumberland County or surrounding regions, de Blois Built is ready to guide you from the first conversation through to completion — with clarity, care, and craftsmanship.

Testimonials

What Homeowners Appreciate Most

Our clients value the quality of the finished work, but they also appreciate the way we manage the journey from start to finish. Clear communication, reliable timelines, and a detail-focused process help create an experience that feels as strong as the final result.

    
 
 
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   Huw Evans 
 35 days ago
 
 
 Trustindex verifies that the original source of the review is Google. We recently hired de Blois Built to complete a full home renovation of our property in Trent Hills and could not be happier with the experience. Doing a complete gut job of your home can be a frightening experience, but from the first meeting, we knew that we could trust Mike, Roisin and the whole de Blois team. This was a true custom home renovation/gut job, and involved significant structural changes that completely transformed our living space. Throughout the entire project, the de Blois team demonstrated outstanding service, craftsmanship, and attention to detail. Every aspect of the renovation was completed to the highest standard, and the quality of the work exceeded our expectations. What truly set them apart was their communication and professionalism. They consistently kept us informed about the schedule and budget, providing regular updates and ensuring there were never any surprises. Their project management was exceptional. If you are looking for a trusted contractor in Trent Hills or Northumberland County, we highly recommend the de Blois team. We are absolutely thrilled with the final result and would not hesitate to work with them again.
  
 
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   Jennifer Scholes 
 160 days ago
 
 
 Trustindex verifies that the original source of the review is Google. As a registered OAA architect with over 20 years of experience in residential design, I’ve had the pleasure of working with Mike and his team at de Blois Built on a range of projects—from complex renovations and additions to custom new builds. I would highly recommend de Blois Built to both clients and fellow architects or designers. Their ability to deliver exceptional service, combined with a high level of expertise in construction execution, makes them a reliable and collaborative partner. Their attention to detail, clear communication, and commitment to quality consistently contribute to successful project outcomes.
  
 
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   Dimitri Papatheodorou 
 167 days ago
 
 
 Trustindex verifies that the original source of the review is Google. I recommend de Blois Built Inc. as a trusted and collaborative construction partner for architectural projects requiring expertise, precision, and strong project management. Mike DeBlois and his team served as General Contractor for the extensive renovation of a rural property I designed near my office. The project involved significant upgrades to the existing structure, including a full professional gut renovation of the interior, resulting in a beautifully crafted retreat for a Toronto-based professional couple. Their skill, attention to detail, and ability to execute complex residential work make them a reliable partner for any architectural firm. Dimitri Papatheodorou Architect
  
 
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   Rick Dean 
 266 days ago
 
 
 Trustindex verifies that the original source of the review is Google. As a subcontractor we have had the privilege to work alongside de Blois Built, and they are an excellent team. Their professionalism, communication and attention to detail really stand out. The collaboration on their projects is strong, and the quality of the finished product speaks for itself. We look forward to many more collaborations in the future and highly recommend de Blois Built.
  
 
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   James Hunter 
 487 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Mike and team are incredible.  Very high end finishing touches and solid work all round.  They did our entire ground floor on time and on budget.  Don't hesitate.
  
 
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   Carl Spitzer 
 489 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Mike de Blois brought our designs to life and created a beautiful home for us. He and the team have an attention to detail that is impressive. Our full house renovation in mid town Toronto is now complete and we are very pleased.
  
 
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   cristina pop 
 490 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Michael is very skilled as a general contractor and has an honest, responsible character.  Going through a renovation always has its stressful or overwhelming moments.  You want to be in those moments with someone you trust is doing their best, and whose best assures a standard of excellence.  This is Michael and his team.   Throughout the building of our home, he and his team were wonderful to us as well as our neighbours.  They took great care in the price quotations to ensure we scale the project to something we can afford.  They matched their quote during post-Covid times, when prices were fluctuating and the market was difficult to predict.  They worked with quality materials and did a great job aesthetically as well as functionally in our home.  I cannot recommend this team enough.  All the best in your renovation.
  
 
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   Chris Curry 
 492 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Mike and the entire de Blois Built (“DBB”) Team were our contractor for an extensive full house renovation in Toronto that was completed in July 2024.  Like any large and complex construction project it is all about the “Team”.  DBB was nothing short of excellent throughout the years leading up to construction start, all the way until completion and thereafter.  Their collaborative approach with Architects, Designers, Subtrades, etc., is what truly differentiates them from the crowd as they repeatedly came to the table with effective solutions to any issue that may have arisen.  More importantly though, Mike and his team would proactively suggest design or cost-effective alternatives for consideration throughout the life of the project that in hindsight, now living in our house for a year, was true game changer on how small suggestions has produced big benefits and flow for our family’s needs.    I would be more than happy to recommend Mike & DBB services to anyone considering a major (or minor) renovation or new build.  Regards. Chris Curry
  
 
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   Sarah Henderson 
 632 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Mike and his de Blois Built team’s skill, craft, attention to detail and design, as well as a solutions based approach not only brought our architect’s plans to life, but also made the experience of renovating our home an enjoyable one. Not to mention, Mike delivers on his promises, is always adding value and is an absolute pleasure to deal with. In fact, his whole team is a pleasure and it’s clear that they enjoy what they do. Thank you Mike and team for all your ideas, attention and hard work. We love our house!!! Sarah & Griff H. Hibou House
  
 
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   Chris Walcott 
 737 days ago
 
 
 Trustindex verifies that the original source of the review is Google. We share this experience from a different perspective than a client, and we were and are very pleased working with de Blois. We are a subcontractor for plumbing mechanical AC irrigation installs and service. We have been in business for over 60 years and worked with many different contractors, those that truly care for their product and provide a great work culture are few and far between. De Blois definitely joins this club of selective contractors.

Service Area

Proudly Based in Northumberland County, Ontario

We work with homeowners throughout Northumberland County, Prince Edward County, Hastings County, Bay of Quinte, Peterborough, the Kawarthas, and surrounding regions who are looking for a higher standard of renovation and custom building. Our projects are built on rigorous preconstruction planning, quality craftsmanship, and a genuine commitment to getting the details right.

Whether you are updating your primary residence, expanding your living space, or planning a custom new home, we bring a tailored, hands-on approach to every project and every property.