A glasshouse which was demolished in the garden of Oxburgh Hall will be rebuilt after the 15th century Norfolk manor won planning permission to resurrect the Victorian structure.
The sun-filled Kitchen Garden outbuilding was replaced in 1966 and eventually torn down when it was deemed unsafe. It will now be reconstructed based on photographs of the original design.
Head Gardener Graham Donachie called the glasshouse a "very important" part of the hall. "We will be able to grow plants from seed once more – this will include more than 7,000 plants, saving us between £600 and £800 annually," he said.
"It also means that we will be able to start selling more of our own home-grown plants to visitors, the money from which will be put towards future projects in the garden."
The project will be the first time the National Trust has chosen to deploy skilled staff and volunteers ahead of building contractors in the East of England.
A spokesperson for the Trust said the "dedicated team" would be working in the garden this winter to make the glasshouse "the focal point of the garden once more".