For more options, try out the Banksia Motel Collie and the Hidden Grove Retreat. They are 19 kilometres and 16 kilometres respectively from the main center. If these two aren't what you're looking for, you can try the Blackwood Inn Innkeepers House or the Balingup Highview Chalets.
The close by cities of Bridgetown and Bunbury are worth exploring. Bridgetown is 45 kilometres to the south of Mummballup, while Bunbury is 50 kilometres to the northwest. Hotels in Bridgetown are the Ford House Retreat and Shambhala Guesthouse. The Mantra Bunbury and Quest Bunbury Apartment Hotel are some of the options in Bunbury.
Hotels in Mummballup start at AU$135 per night. Prices and availability subject to change. Additional terms may apply.