More home. Same neighbourhood.

Residential Home Additions in Northumberland County, Ontario

Expand your space without compromising what makes your home yours.

transforming your home into a space

Expand Your Living Space with Quality Additions

Your home has served you well — and sometimes that means it’s time to ask more of it. At de Blois Built, we build custom home additions that feel like they were always part of the plan. Not tacked on. Not visually disconnected. Properly integrated — structurally, aesthetically, and functionally — with the home you already have. Additions require careful planning to ensure structural integrity. We work with engineers and designers to create plans that are safe, functional, and visually cohesive.

We manage the entire process from feasibility through final walkthrough, coordinating design, permits, and trades under one roof. Serving Northumberland County, as well as Prince Edward County, Hastings County, Bay of Quinte, Peterborough and the Kawarthas, we bring the same standard of care to an additional project as we do to a full custom build.

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Our Approach

A Process Built Around Your Home

A well-executed addition requires more than skilled labour — it requires careful planning, clear and accurate scope definition, expert cost consulting, and a contractor who understands how best to integrate new construction with existing structures. Defining the scope of work for an addition can be more complex than a new build; the builder you choose can determine whether the process feels controlled or chaotic. Here’s how we approach each project:

What We Build

Home Addition Services

Every addition is different and additions demand careful planning to ensure structural integrity and flow. We can help guide you to the best type of addition for your home and your needs, whether it’s a rear addition, a second storey addition or a site expansion. Below are the types of projects we regularly take on across Northumberland County and surrounding areas — each managed with the same full-scope process.

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why we stand out

Why Choose de Blois Built for Your Home Addition?

A home addition is a significant investment in your property. Here’s what you can expect when you work with de Blois Built:

Contact us today

Ready to Add More Space to Your Home?

If you’re considering a home addition in Northumberland County or the surrounding region, let’s talk. We’ll walk you through the process, help you understand what’s involved, and give you an honest picture of what your project would look like with de Blois Built managing it.

Testimonials

What Our Clients Are Saying

Our clients’ satisfaction is our greatest achievement. Here’s what a few of them have to say about working with de Blois Built.