On 11 October 1855, Brunner married Jane Robson, the 26-year-old daughter of a labourer who had brought his family to New Zealand the previous year. It was a respectable match for Jane as Brunner was considered a particularly eligible bachelor in Nelson, one of around 45 professionals working in the town of about 1600 people. His salary had increased to £300 (£24,000) and he was now Chief Surveyor for the Nelson Province, the local returning officer and the Commissioner of Native Reserves for Nelson. He also owned three properties, including his Nelson office.