No, but you can use the house, staircase, and grounds for photos.
You cannot have a wedding here. To take wedding, engagement, graduation, etc. photos that are using the mansion or grounds as a backdrop, you do need a photography permit from the Pittock mansion or Portland Parks and Recreation, respectively.
I don't think so. In four years I have never see any weddings events or any other parties. We had short neighborhood meeting with small catering once there, but I think it was an effort to make a peace with revolving neighbors;) it was three years ago.
I believe you can, but you'll have to talk ahead and arrange everything.
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