The heritage-protected building was built in 1906 and still operates using some of the original electrical components.
However, a recent assessment of the building found some of the components had degraded over time and now posed a safety risk.
A Dunedin City Council spokesman said Olveston and its gardens would be closed to the public from July, and DCC contractors would soon start work to upgrade the electrical systems.
As part of the project, a complete upgrade of the main switchboard and sub main cables and the replacement of subcircuit cables will take place, as well as general repair and maintenance of many of the outdated components.
‘‘The upgrade project will address these issues as a vital investment into the protection of the significant heritage building,’’ he said.
‘‘The upgrade also aligns with the DCC’s arts and culture strategy, spatial plan and heritage strategy — all of which emphasise the preservation and protection of Olveston’s interior and exterior.’’
The residence was built for the Theomin family, and later given to the City of Dunedin in the 1960s by Dorothy Theomin, the daughter of the original owners, David and Marie Theomin.
It is noted as being one of the first private residences in Dunedin to have working electricity, which was originally generated using gas, and it has become a valued tourist attraction.
The project is expected to be completed in time for the building to reopen in October.
