home insurance premium increase after claim

I need advice on a car insurance premium increase.?
My car insurance company just raised my annual premium of more twice after I discovered that my 18 years. old grandson moved to our house. We have never had complaints and my grandson has had his license 1 year. and never had a driving violation. Does anyone know if this is legal and do I have any other recourse than to go shopping for another company?
It is legal, and young men are much more likely to be in an accident, but Do not have a record. You can find lower rates and see what is out there.
Categories: Home Insurance