Depending on where you are coming from, you may find the park and ride to be the best solution, see here for more info: http://www.norfolk.gov.uk/Travel_and_tra...
You can use http://en.parkopedia.co.uk/parking/norwi... to look at available car parks and street parking plus people can list their driveways and rates there as well so you might find something pretty useful.
As David suggested, the train may also be a useful solution.
Go and look around today and see how much parking will cost you.
No one is going to let you park on their drive.
It depends what you're looking for, and what your budget is.
Best for a single 20-something won't be best for a family with children.
Go by train. and buy a 'Season Ticket'. Cheaper than buying separate tickets every day.
www.greateranglia.co.uk