As work continues to get ready for major construction on the Yonge North Subway Extension, you may receive a letter from Metrolinx about booking a pre-construction survey of your property. 

These surveys are a routine part of building large transit projects. They help us understand and document the condition of nearby properties before work begins. The surveys are optional and offered at no cost. 

If you receive a letter and accept the offer, a qualified team will carry out a detailed inspection of your property, typically documenting both the interior and exterior. This creates a record that can be compared before construction starts and after it’s complete. 

Not every property along the route will receive a survey offer. Surveys are focused on areas where certain types of work – including piling and tunnelling – may have the greatest potential to cause vibration.  

If you do receive a letter, it will include details on how to book your survey and what to expect. 

Learn more about pre-construction surveys and how we manage noise and vibration during construction.