Right in the heart of Wellington is Antrim House, a prominent landmark in what was once a predominantly residential central city street. Its historic significance arises from its origins as the home of successful businessman and founder of R Hannah & Co Ltd, Robert Hannah, his wife Hannah, and their family.

Antrim House (named after the county of Robert's birth) was his last home, had all the latest conveniences including gas, electric light and bathrooms. It was designed in Italianate style by the firm of Thomas Turnbull & Son, which designed many other notable Wellington buildings. It has kauri panelling and staircase, stained glass windows (all different) and ornate ceilings by Wunderlich of Sydney. In the grounds are a stable block and conservatory.