--- title: "Cornerstone Construction — General Contractors | Houzz" canonical_html_url: https://www.houzz.com/professionals/general-contractors/cornerstone-construction-pfvwus-pf~126215948 markdown_url: https://www.houzz.com/md/professionals/pf~126215948.md entity_type: LocalBusiness business_name: "Cornerstone Construction" category: ["General Contractors"] image: https://st.hzcdn.com/fimgs/5183ed65020f9e5c_4490-w400-h400-b0-p0--.jpg address: "London, Ontario N6H 3X4, Canada" latitude: 42.9832 longitude: -81.2842 phone: "(519) 719-8429" website: http://cornerstoneconstructionlondonlimited.com rating: 5 review_count: 30 best_of_houzz_awards: 2 followers: 18 last_updated: 2026-09-03 --- # Cornerstone Construction Original Houzz profile: [Cornerstone Construction](https://www.houzz.com/professionals/general-contractors/cornerstone-construction-pfvwus-pf~126215948) ## Professional summary - **Primary category:** General Contractors - **Location:** London, ON - **Serves:** London - **Houzz rating:** 5.0 out of 5 (30 reviews) - **Best of Houzz:** 2 awards (2021–2025), for Service. ## About ### Houzz Badges - Recommended on Houzz - 500 Ideabook Saves - Family owned - References available - 30 years in business Our focus is on custom designs and timeliness, with each project treated with its own unique approach allowing transparency and communication every step of the way. Serving the London Area for 30 years our goals remain the same; to create the spaces that you have always dreamed of. Whether it's a bathroom remodel or a whole home renovation, we are here for you when you are ready to start planning. ### Services Provided - Home Remodeling - Bathroom Remodeling - Kitchen Remodeling - General Contracting - Home Additions - Home Extensions - Basement Remodeling - Guesthouse Design & Construction - Home Restoration - Porch Design & Construction - Attic Conversion - Window Replacement - Window Installation - Shower Installation - Home Gym Design & Construction - Attic Restoration - Skylight Installation - Range Hood Installation ### Areas Served - London ### Typical Job Cost CAD 20,000 - CAD 500,000 ## Business Details | Field | Value | | --- | --- | | Business Name | Cornerstone Construction | | Address | London, Ontario N6H 3X4, Canada | | Phone | (519) 719-8429 | | Website | http://cornerstoneconstructionlondonlimited.com | | Followers on Houzz | 18 | ## Contact - **Houzz profile:** [Cornerstone Construction](https://www.houzz.com/professionals/general-contractors/cornerstone-construction-pfvwus-pf~126215948) - **Website:** http://cornerstoneconstructionlondonlimited.com - **Phone:** (519) 719-8429 ## Credentials - **Best of Houzz:** 2 awards (2021–2025), for Service. ## Reviews **Overall rating: 5.0 out of 5 — 30 reviews** *Aspect averages:* - Work Quality: 50.0 - Communication: 50.0 - Value: 50.0 ### Reviews **★★★★★ — Aara Suksi, Sept. 2024** > Mark and his crew just completed a major renovation (kitchen and bathroom rebuild, and rear 2-storey extension) on our 120-year old home. They took so much care to make sure we were happy with every detail. They stayed on schedule and within the budget. While working the team was tidy and considerate, always leaving the jobsite swept and free of debris. It was a real pleasure to have them on the property. They were patient when we changed our minds about a couple of things, and made excellent suggestions that we would not have thought of, always working to maintain the look of our older home. We are delighted with the final result. Every day it's such a pleasure to come home. **★★★★★ — Tony, June 2020** > I have had Cornerstone do two major renovation projects on my house. The first was a major basement plus backyard renovation involving a complete gutting and rebuild of the basement to include a laundry room with toilet and sink, installation of a gas fireplace and bookcases, an extension to house a new staircase to the basement and concrete patio. The back yard was terraced with retaining walls. The second was a complete renovation of the upstairs bedrooms and front porch. The bedrooms were stripped down to the studs and skylights were added. The old metal porch was removed and replaced with a wooden roofed porch. > > Mark knows what he is doing from the planning through to the execution. For the basement renovation, an architect was required which Mark helped arrange. When both projects started, Cornerstone parked their trailer in the front yard and worked every day on the renovation until they were completed; apart from a few last things which were finished up quickly. **★★★★★ — Katrina Williams, May 2020** > Cornerstone provides reliable, quality service. We have done multiple projects with Mark and his team, each time thrilled with the results. We trust Mark and his team members explicitly and would highly recommend them for your home renovation. > > We were engaged in project planning and selection of all the materials. Once they started work, they remained focused and committed to our project until the transition was complete to our satisfaction. They kept the workspace clean and respected the needs of our family as we co-existed through some major tear down/rebuild. We communicated regularly throughout the project. There were no surprises when it came time to settle up. Overall, a really great customer experience. Thanks again Cornerstone! **★★★★★ — HU-174586541, May 2020** > Fantastic work, time and time again! From minor household repair to major renovations, we have been very happy with Cornerstone Construction. They don’t cut corners and they have a great eye for detail. They provide excellent consultations and will patiently explore all options with you. They are also very friendly and respectful, causing minimal disruption when working. It’s always a joy to work with them and I don’t think we’d ever go with any other Contractor! **★★★★★ — Alisha, May 2020** > Some words to describe Mark and his team: > -Professional, > -Organised > -Attention to detail > -Timely > -Maintained a clean work space > > Mark and his team offered guidance and advice throughout our project from design to finish. We especially appreciated that he listened to what we were trying to acheive and seem to be a step ahead in offering solutions. > Working with 3D drawings from the design stage ensured that we were always "on the same page". > The Cornerstone team worked tirelessly to complete our job on time. **★★★★★ — Peter & Madelaine Rollings, May 2020** > Mark McLean and his team at Cornerstone completed an outstanding renovation of our home. > We could not have been more delighted and fortunate to have connected with him. From the very beginning, we were impressed with Mark's professionalism, his mastery and attention to detail, as well as his understanding of the full scope of our ideas. He was particularly organized, keeping to his original timeline. His diligence and courtesy involving us in each step of the renovation was appreciated, as we always knew what was was coming next. Importantly, Mark kept to our original budget. On top of everything, Mark brought to us his cheerful nature and rich sense of humour making our entire experience positive, creative, and wonderful. We would not hesitate to highly recommend Mark and his Cornerstone Company to anyone. > Thank you again Mark and your team. Again, an outstanding renovation! **★★★★★ — Michael Milde, April 2020** > Outstanding - highest possible recommendation. We have worked with Cornerstone Construction for over 17 years - Mark and his crew have renovated our entire house. The work included a kitchen addition. Our house dates to 1910 and retains many of its original features. The attention to detail, including period detail, has been exceptional in every project. The quality of the workmanship is impeccable from design to execution. Estimated times to completion have been entirely reliable. Working with Mark has been an absolutely wonderful experience. **★★★★★ — Jim Brown, April 2020** > We have had a number of things done by Mark. All were excellent. The biggest of these was refinishing a hardwood floor and installing a number of shelves in a study. I am extremely pleased. We are also planning to redo our kitchen and expect to ask Mark when we finally get around to doing it. **★★★★★ — Jane Clark, April 2020** > Mark and his team did an outstanding job on our renovations. We have used them for two renovations and plan to have them back to renovate our future retirement home. They are quiet, courteous and professional. Mark has extensive knowledge of all aspects of home renovations and the quality of his work is top notch. Our family never doubted that we were in good hands, as from the beginning it was apparent that the Cornerstone Construction team provided superior service. Deadlines were always met, and there was no question of meeting the budget because Mark had a meticulous eye for detail, pre-ordering and delivering everything before the project began. Completing our renovations was a stress free experience with Mark, and if he did run into an obstacle he always had a plan B. Once he starts a project, he is there till it's finished, demonstrating his commitment and dedication to his craft. **★★★★★ — Stylistic Glass & Mirror, April 2020** > We had the pleasure of having Cornerstone Construction install cabinetry in our office showroom. Throughout the entire process, Mark, Jordan, and Team were professional, timely and personable. The quality of product showed attention to detail through their outstanding craftsmanship. We highly recommend Cornerstone Construction with great confidence, and will always use them for future projects. Thank you again! **★★★★★ — Robert Stainton, April 2020** > If you want it super cheap and don't care about shoddy standards and poor materials, this company is not for you. If you are willing to pay a very fair price for excellent design and execution, and total reliability both during and after the work, choose Cornerstone. We have trusted this company with all of our annual repairs and with major renovations since 2004. We are 100% comfortable giving them the run of the house while we are away. **★★★★★ — Cathy Holder, April 2020** > Mark and Jordan are ultimate professionals at Cornerstone Construction. This company has 30 years experience which shows as they provides the best quality and unbelievable workmanship on each job. They are reliable and dependable. I have had two renovations done by them and would not hesitate to refer Cornerstone to friends and family . ## Selected projects - [Renovation (Old South), Attic Master Retreat, Main Bath & 2nd Floor Laundry](https://www.houzz.com/hznb/projects/renovation-old-south-attic-master-retreat-main-bath-and-2nd-floor-laundry-pj-vj~6162391) - Location: Not specified - Photos: 38 - [Addition (Old North) Kitchen,Bathrooms,3rd Floor Attic, Decks. Thornton](https://www.houzz.com/hznb/projects/addition-old-north-kitchen-bathrooms-3rd-floor-attic-decks-thornton-pj-vj~2296284) - Location: London, ON - Photos: 41 - [Master Bathroom (Beck Estates).Navy](https://www.houzz.com/hznb/projects/master-bathroom-beck-estates-navy-pj-vj~6160489) - Location: London, ON - Photos: 6 - [Master Bathroom (Beck Estates)](https://www.houzz.com/hznb/projects/master-bathroom-beck-estates-pj-vj~6161978) - Location: Not specified - Photos: 6 - [Office-Home](https://www.houzz.com/hznb/projects/office-home-pj-vj~6160579) - Location: Not specified - Photos: 7 - [Renovation (Old North), Kitchen, Master Bath, Deck. Maitland](https://www.houzz.com/hznb/projects/renovation-old-north-kitchen-master-bath-deck-maitland-pj-vj~2298730) - Location: London, ON - Photos: 19 - [Attic Retreat. Master Suite (Old North) Thornton](https://www.houzz.com/hznb/projects/attic-retreat-master-suite-old-north-thornton-pj-vj~2298748) - Location: London, ON - Photos: 6 - [Renovation (Hunt Club), Master & Guest Bathrooms](https://www.houzz.com/hznb/projects/renovation-hunt-club-master-and-guest-bathrooms-pj-vj~2287451) - Location: London, ON - Photos: 15 - Description: Master Bathroom - Calming Oasis Before & After Pictures (8) appear at the end of the photos - [Addition (Old North), Kitchen, Bath, Great Room, Powder Room, Gym (Grosvenor)](https://www.houzz.com/hznb/projects/addition-old-north-kitchen-bath-great-room-powder-room-gym-grosvenor-pj-vj~6162009) - Location: London, ON - Photos: 29 - [Kitchen (Old Hunt) Radcliffe](https://www.houzz.com/hznb/projects/kitchen-old-hunt-radcliffe-pj-vj~6162535) - Location: London, ON - Photos: 13 - [Bathroom & Laundry Room Combination (South)](https://www.houzz.com/hznb/projects/bathroom-and-laundry-room-combination-south-pj-vj~2296239) - Location: London, ON - Photos: 5 - Description: Black & White Basement Bath-Laundry Combo - [Renovation, (Old North) Attic Master Retreat, Kitchen. Waterloo](https://www.houzz.com/hznb/projects/renovation-old-north-attic-master-retreat-kitchen-waterloo-pj-vj~6161996) - Location: Not specified - Photos: 41 - Description: Master Bedroom Attic Retreat. Living Space, Bedroom, Walk-In Closet & Bath - [Master Bathroom - 'Black & White'](https://www.houzz.com/hznb/projects/master-bathroom-black-and-white-pj-vj~2296001) - Location: London, ON - Photos: 3 - Description: Black & White; Black and White Bath; Claw Foot Tub; Black Claw foot tub; white and black subway tile; marble shower; - [Glass Panel Doors - Opaque / Frosted](https://www.houzz.com/hznb/projects/glass-panel-doors-opaque-frosted-pj-vj~2299567) - Location: London, ON - Photos: 9 - [Bathroom (Old North) Chalmers](https://www.houzz.com/hznb/projects/bathroom-old-north-chalmers-pj-vj~2296220) - Location: London, ON - Photos: 4 - [Renovation (Stoneybrook), Kitchen & Bathroom](https://www.houzz.com/hznb/projects/renovation-stoneybrook-kitchen-and-bathroom-pj-vj~2296299) - Location: London, ON - Photos: 14 - [Master Bathroom (Beck Estates).A](https://www.houzz.com/hznb/projects/master-bathroom-beck-estates-a-pj-vj~2296209) - Location: London, ON - Photos: 4 - [Master Bathroom (Old North) Maitland.C](https://www.houzz.com/hznb/projects/master-bathroom-old-north-maitland-c-pj-vj~2296143) - Location: London, ON - Photos: 5 - [Exterior Renovation](https://www.houzz.com/hznb/projects/exterior-renovation-pj-vj~2298653) - Location: London, ON - Photos: 4 - [Exterior Renovation & Addition (Old North) Dramatic Before & After Photos](https://www.houzz.com/hznb/projects/exterior-renovation-and-addition-old-north-dramatic-before-and-after-photos-pj-vj~2298533) - Location: London, ON - Photos: 11 [See all 30 projects](https://www.houzz.com/professionals/general-contractors/cornerstone-construction-pfvwus-pf~126215948) --- *Source: Houzz professional profile. Reflects the profile as of 2026-09-03.*