This hotel is 2 minutes walk from the Kokoronokai Centre:
http://www.premierinn.com/en/checkHotel/NORCIT/norwich-city-centre-duke-street
This B&B is close to the railway station:
http://www.marlboroughguesthouse.co.uk/
This hotel is close to the bus station:
http://www.travelodge.co.uk/hotels/288/Norwich-Central-hotel
For more options search on these websites
http://www.booking.com
http://www.wegotravel.co.uk