You need to visit this page for information on accessible housing in Calgary
http://accessiblehousing.ca/
or more specifically
http://accessiblehousing.ca/what-we-do/
Other information:
This will help you understand what standards/ dimensions you are looking for
alberta barrier free design guide
http://www.safetycodes.ab.ca/Public/..._protected.pdf
This one might be a little more aimed at public facilities with the City of Calgary but it very comprehensive
http://housing.cpa-ab.org/images/fil...0Standards.pdf
A couple of questions to consider
Can Mom weight bear (stand) to transfer to another seat ( toilet?)
Will mom's condition progress/ change in future
If the kitchen counter was lower and cleared of under counter drawers, etc (like a big table/desk) could she cook for herself?
these will help you consider how much renovations you want for the space available