The communication with Catherine was perfect, she let you all the details.
The house is in perfect conditions, very clean and all new.
There is space to park in a common lot besides the house. Just ask which is the spot!
Although it is away from downtown Quebec, you can get there in 10-12 minutes driving and parking is not expensive (10-12 CDN) for almost 10 hours and the city is really beautiful!!!
The house is near Montmorency Falls Park (you can even get there walking) and is a nice place to visit, also the ile d'orleans very close
Consider Catherine's as a very good option to stay in Quebec!!!