Experts are still investigating why tonnes of masonry collapsed into the courtyard of the 15th Century moated manor house, near Swaffham, last Thursday night.
Work has been carried out to make the building wind and watertight, and engineers have been on site inspecting the damage.
The National Trust, which owns the historic property, said the next step would be to erect scaffolding, to allow close inspection of the roofline to plan the full extent of the repairs needed.
Whilst this work is going on, the hall and shop will remain closed for safety reasons.
Caroline Pons, the trust's assistant director of operations in the east of England, said: 'The hall and shop at Oxburgh will remain closed whilst we work with experts to investigate the damage and determine the extent of repairs required.
'The safety of our visitors, staff, volunteers and donor family who live onsite are our priority and we're really grateful for their understanding at this time.
'It's thanks to the ongoing support of our members and visitors that we'll be able to carry out the necessary repair work to this magnificent building.
'We hope to re-open as soon as we can, but only when it's safe to do so. In the meantime, visitors are welcome to come and enjoy the grounds.'
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