Located in the extensive grounds of the Werribee Park Mansion, the Glasshouse, constructed between 1919-1923, was in a poor state of repair, with broken glazing, timber rot and structural damage. The structure forms a key backdrop to the parterre and grounds at the Mansion, and the extensive damage across the structure had necessitated its closure and removal of public access.

Key challenges in the project included the specification of glazing for the walls and roof which had to comply with current Building Code regulations, as well as be aesthetically accurate and allow for the propagation of plants. Prior to the commencement of works, the glazing had been lime-washed cyclically, to cut down heat load and glare within the structure. This practice led to the degradation of the glazing.

Selection of replacement glass needed to consider building code compliance, UV transmission for plant growth and, compatibility with existing fabric to minimise physical or visual change to the building. In addition, the thickness of the glazing would necessitate the increase of existing timber members to accommodate the additional depth, changing the visual appearance of the building.

Through careful consideration, discussion with the Structural Engineer, Building Surveyor and Heritage Victoria, safety glazing was proposed to the majority of the building with areas of laminated glazing limited as far as practicable. To allow for ongoing heat and glare control, Parks Victoria chose to install internal blinds to provide additional manual shade and heat management.