I've used Adcor for 3 large projects and a handful of smaller projects. I always found them to be professional and their workmanship (especially carpentry) is second to none.
Summary of the projects: The first project was a two story addition on the back of our house. The first was an extension of our kitchen and the second story was an incredible bathroom that was featured in a magazine. The second project was a custom garage to replace a 100 year old garage. The third project was a 2 story addition on the front of our house where the first story is a porch and the second story is study room.
We've hired a handful of different contractors over the years but Adcor is by far the best for 4 main reasons. First, if you've ever needed building permits in an older neighbourhood (we are in the Glebe), it is a pain... Adcor took care of it easily. Second, they are SUPER clean. This is especially important if you are living in the house during a big renovation. The job site was always clean - no other contractor we've worked with was as clean. Third, they have extensive experience with older homes which is invaluable. They told exactly what to expect before they opened up the walls so we had no surprises. Lastly, their finishing workmanship, especially their carpentry is exceptional. All of our projects match the original architecture of our house.
They are not the least expensive contractor but they are also not the most expensive. We've found their pricing to be fair and great value for the quality of work. I would not hesitate to refer Adcor or to hire them for my next project.