Missing buildings on maps

For a uni project in Okotoks (Canada), I'm downloading the map in PDF to edit it in Illustrator. Unfortunately I found out that the data of the homes/buildings is missing, whole neighborhoods. When I look on other maps websites, I see the data/houses, but there I cannot download it as a PDF. So there must be a complete dataset somewhere, right? Is there anyone who can help me turn on the data? I have no/minimum programming skills as an Urban Design student, but I would like to learn! I have attached a screenshot where houses can be seen on one side of the road and not on the other. Thanks in advance for anyone who can help me!