de Blois Built is a HCRA-licensed general contractor based in Northumberland County, Ontario. Since 2009, we’ve delivered custom whole-home and smaller scope renovations, as well as structural additions for homeowners across Northumberland County, Prince Edward County, the Kawarthas and surrounding areas. We take on projects where the details matter — where clients need a contractor who manages the full scope, coordinates the trades, collaborates with designers, and stays accountable from the first planning conversation to the final walkthrough. Every project begins with preconstruction: feasibility, scope definition, and cost development that sets the foundation for a build that stays on time and on budget.
From preconstruction planning to completed build, we manage every phase with the same standard of care. Below are the services we offer — each backed by our full project management process.
We manage new home builds from the ground up across Northumberland County and surrounding areas — design collaboration, Tarion enrollment, site development, permit management support, trades and supplier coordination, strategic analysis of budgets and schedules, comprehensive warranty, and construction handled start to finish.
Whole-home, partial renovations and custom residential projects managed with discipline and precision. Quality materials, highly-skilled trades, and full construction management from preconstruction to final walkthrough, all covered by a comprehensive warranty.
Structural additions that integrate with your existing home — not bolted on as an afterthought. We manage feasibility and cost consulting, structural and mechanical planning in collaboration with engineers and designers, and construction covered by a comprehensive warranty to deliver an addition that feels like it was always part of the plan.
Seasonal and waterfront property renovations across Northumberland County, Prince Edward County, and the Kawarthas. We manage each project with the same full-scope process we bring to any build: clear planning, coordinated trades, and honest communication throughout.
Kitchen renovations managed with the same rigour as a full build — robust preconstruction planning, design collaboration for custom layouts, premium finishes from trusted suppliers and installed by highly-skilled trades, delivering results that hold their value.
Since 2009, de Blois Built has been delivering renovation and construction projects in south-eastern Ontario. Based in Northumberland County, and also serving Prince Edward County, Hastings County, Bay of Quinte, Peterborough & the Kawarthas, we’re HCRA-licensed, RenoMark certified, and all of our new builds are Tarion enrolled. Mike de Blois leads every project personally, working alongside a trusted network of design professionals, quality suppliers and highly skilled trades, and managing each job through our project and construction management platform, JobTread — giving clients real-time visibility into schedule, budget, and project progress throughout the build.
Whether you’re planning a whole-home renovation, a new custom build, or a cottage project in Northumberland County or the surrounding region — we’d love to chat about it. Contact us to start the conversation.
de Blois Built has built its reputation project by project, client by client, across Northumberland County and the surrounding region. Here’s what some of them have to say.
