Durham Region
custom home builder
Full-service design-build homes, cottages, and major additions crafted with precision, integrity, and care.
Why choose KOR Construction
Legacy and expertise
Four generations of building knowledge, blending craftsmanship with modern design.
Trusted and licensed
Fully licensed by HRCA and meeting Ontario’s highest standards.
Full-service design + build
From concept and architectural design to construction and finishing—every step handled.
High-end craftsmanship
Precision and care in every home and addition, delivering spaces that are beautiful and functional.
Seamless process
One team managing your project from start to finish for a stress-free experience.
Our work speaks for itself
Highlight: Project Wagner Lake Living
A 2,600 sq. ft. custom modern farmhouse in Sunderland, north Durham Region built for comfort, style, and longevity. This build reflects our integrated design-build approach. Designed in-house by our BCIN-certified architectural designer and built by the KOR Construction team, this custom home blends craftsmanship, structural expertise, and refined detailing.
Our services
We specialize in bringing your vision to life through expertly delivered building services. Whether you're dreaming of a custom home or cottage, planning a thoughtful addition, or need professional framing, we offer a seamless, end-to-end experience rooted in quality, integrity, and detail.
Custom home building
Bespoke design-build homes crafted around your lifestyle.
Additions + expansions
Thoughtfully designed additions that blend seamlessly with your home.
Residential framing
Precision structural framing for homes, cottages, and complex builds.
What our clients say
I wish there was a choice to give this company a 10 STAR not just five! From that initial call to the last nail that went in, it has been an absolute pleasure to work with KOR Construction. We had a huge, delayed project at hand with complicated design and truss plans and they put us back on track to finish on time. From getting the initial estimate, weekly updates/questions and throughout construction, they have been beyond courteous and professional!
Elevation of a custom 6,900 sq. ft. two story structure requires a lot of organization, detail, teamwork, working equipment and lumber deliveries in stages. These guys did it all in the most seamless and fastest pace possible with short lunch times and minimal breaks. Their reliability was superb, work ethic commendable and they have never missed a day when they were expected to be there!
No hidden costs or extra charges, unless we added something and that too was very reasonable. The work was impeccable and of the highest quality and craftsmanship. Next trades in all commented on what an awesome job the framers had done!
We got to visually walk through each level before the walls went up, which allowed for any changes to be made before a nail was hammered into any piece of lumber!
I don't know the entire crew by name, but we do know that it was an absolute pleasure to work with Kurt and his team at KOR Construction. They are the best!
Katalin + Alex | Property Owners
We had the pleasure of working with KOR Construction on our custom home build. Kurt and his team were extremely efficient, professional and the quality of workmanship has been outstanding. The knowledge and experience KOR brings to the table gave us such peace of mind. Kurt was great to work with, and always available to talk through any changes we wanted to make along the way. We would highly recommend KOR Construction to anyone looking to build their dream home!
Emmylou + Phil | Property Owners
KOR Construction was our framer for our project. Kurt has work integrity, knowledge and skill. We are building a Richard Wengle house, which is not an easy project, along with framing with wood there are many steel columns and beams framed in. Kurt was up for the challenge. I would recommend him for any project!
Cathy + Craig | Property Owners
Built on experience
KOR Construction is led by Kurt Rushlow, a fourth-generation builder whose passion for quality began while framing homes in high school. Inspired by his father, grandfather, and great-grandfather, Kurt brings nearly 20 years of hands-on experience delivering homes built with precision, care, and integrity.
Founded in 2013 as a premium framing service for respected custom home builders in the GTA and Durham Region, KOR Construction has evolved into a full-service design-build firm, creating high-end homes, cottages, and major renovations from the ground up.
We specialize in custom homes, cottages, additions, and expansions that reflect your lifestyle and values. With a fully integrated design-build approach, we transform ideas into inspired living spaces with meticulous attention to detail and craftsmanship you can trust.
