Grant-Marion

Where Experience meets Expertise

We've made building custom homes, residential properties, and commercial buildings our business since 1971. Let our experience make your project a reality.

Grant-Marion Construction team members reviewing plans in the living room of a custom-built house.
Services

dedicated teams for your project

Residential

Our residential construction team specializes in custom homes. We blend precision, craftsmanship, and a profound understanding of your unique needs to create one-of-a-kind living spaces. Our expertise lies in transforming individual visions into realities, ensuring every home we build is as distinctive as the people who live in it.

Commercial

Our commercial construction team, adept in creating functional commercial spaces, combines meticulous planning, technical proficiency, and a deep appreciation for our client's timelines. Our proficiency lies in turning unique concepts into tangible structures, ensuring every commercial space we construct stands out.

Grant-Marion Construction team members reviewing plans on a commercial site.Woman accepting the keys to her new custom-built home from a Grant-Marion executive. Grant-Marion Construction crew member working at a residential construction site.
The renovated Cornwall Square featuring elegant woodwork made to look like trees.Grant-Marion Construction crew member on a ladder at a commercial construction site.Grant-Marion team member showing a client their new custom-designed bathroom.
About Grant-Marion Construction ltd

Over 50 years of
quality craftsmanship

Our team's adherence to high standards of construction and design guarantees that every home or commercial space we build stands as a testament to our dedication to superior quality and durability.

Co-founder of Grant-Marion Construction, Luc Marion, reviewing plans with one of the new Co-Owners, Eric Marion.
CBSA building, built by Grant-Marion Construction.Construction crew working onsite at a residential project for Grant Marion construction.
Tarion Home LogoCornwall Construction Association Logo
Professional Engineers of Ontario logo.Robertson Building Systems logo.
Our work

we take great pride in our work

Waterfront Home
Payette
Lefebvre
Sunroom
Lynch
Kinner
Lot 17
Colbert
Arrowhead Build
Joly
Keezer
Glen Walter Townhouses
New Home Front
Townhomes
New Home Double Garage
Dionne
Fireplace Highlight
Deyoung
Duplex
Conner Crescent
Charlebois
Louis Cardinal
Waterfront Home
Payette
Lefebvre
Sunroom
Lynch
Kinner
Lot 17
Colbert
Arrowhead Build
Joly
Keezer
Glen Walter Townhouses
New Home Front
Townhomes
New Home Double Garage
Dionne
Fireplace Highlight
Deyoung
Duplex
Conner Crescent
Charlebois
Louis Cardinal
Seaway Hyundai
Cornwall Square Food Court
Grant Barn
Williamstown Public School
Cornwall Port of Entry
St. Andrews Firehall
Tim Hortons
Ecole L'Ange Gardien
Benson Auto Parts
Seaway Valley Community Medical Centre
Laggan Public School
Roxmore Public School
Splash N Go
Hospice Cornwall
St. Hubert Renovation
Longevity Acrylics
BVD Cornwall
Sharbin Dental Care
Stanlee Diary Farms
Jean Coutu
Moose Creek Community Centre
Glengarry Insurance
Seaway Hyundai
Cornwall Square Food Court
Grant Barn
Williamstown Public School
Cornwall Port of Entry
St. Andrews Firehall
Tim Hortons
Ecole L'Ange Gardien
Benson Auto Parts
Seaway Valley Community Medical Centre
Laggan Public School
Roxmore Public School
Splash N Go
Hospice Cornwall
St. Hubert Renovation
Longevity Acrylics
BVD Cornwall
Sharbin Dental Care
Stanlee Diary Farms
Jean Coutu
Moose Creek Community Centre
Glengarry Insurance
Waterfront Home
Payette
Lefebvre
Sunroom
Lynch
Kinner
Lot 17
Colbert
Arrowhead Build
Joly
Keezer
Glen Walter Townhouses
New Home Front
Townhomes
New Home Double Garage
Dionne
Fireplace Highlight
Deyoung
Duplex
Conner Crescent
Charlebois
Louis Cardinal
Waterfront Home
Payette
Lefebvre
Sunroom
Lynch
Kinner
Lot 17
Colbert
Arrowhead Build
Joly
Keezer
Glen Walter Townhouses
New Home Front
Townhomes
New Home Double Garage
Dionne
Fireplace Highlight
Deyoung
Duplex
Conner Crescent
Charlebois
Louis Cardinal
South Glengarry Municipal Garage
Children’s Aid Society
Williamstown Public School
Stanlee Diary Farms
St. Andrews Firehall
École Sainte-Lucie
Splash N Go
Seaway Hyundai
Sharbin Dental Care
Roxmore Public School
Minimax Express
Moose Creek Community Centre
Ming & Associates
Seaway Valley Community Medical Centre
Longevity Acrylics
LCBO
Glen Walter Fire Hall
Laggan Public School
Jean Paul St Pierre Russell Library
Jean Coutu
Grant Barn
Hospice Cornwall
South Glengarry Municipal Garage
Children’s Aid Society
Williamstown Public School
Stanlee Diary Farms
St. Andrews Firehall
École Sainte-Lucie
Splash N Go
Seaway Hyundai
Sharbin Dental Care
Roxmore Public School
Minimax Express
Moose Creek Community Centre
Ming & Associates
Seaway Valley Community Medical Centre
Longevity Acrylics
LCBO
Glen Walter Fire Hall
Laggan Public School
Jean Paul St Pierre Russell Library
Jean Coutu
Grant Barn
Hospice Cornwall
Testimonials

high standards
happy clients

"we are BEyond Impressed"

"We are beyond impressed with the work done by this team. We hired them for our dental clinic fit-up in 2017, and they did not disappoint. Their attention to detail and expertise in the field was evident throughout the project. In fact, we were so pleased that we ended up hiring them again in 2023 to build our house. We highly recommend them and will continue to use their services in the future."

Dr. Rebecca Bosse and Mr. Andrew McAllister

"consistently delivered exceptional results"

"We have worked with Grant-Marion on multiple projects for Longevity Acrylics. They have consistently delivered exceptional results, from the office extension to the warehouse addition and even a stand-alone warehouse project. Their knowledge and skill in the construction industry is unmatched. We have complete trust in their capabilities and highly recommend them for any project."

Mr. Lindsay Campbell

"We wouldn't hesitate to work with them again"

"We have had the pleasure of working with Grant-Marion on several occasions. Not only did they build multiple of our family homes, but they also completed numerous commercial projects. Each time, we were impressed by their professionalism, attention to detail, and ability to bring our vision to life. We wouldn't hesitate to work with them again in the future."

Lapointe Family

Every great project starts with a vision

We would love to hear yours.

Get STarted
Co-founder of Grant-Marion Construction, Luc Marion, reviewing plans with one of the new Co-Owners, Eric Marion.