The Elizabethan English country house near Stamford will now stay closed until March 2021 due to the coronavirus pandemic.
Because of the small size of some of the rooms, the narrow routes around the house and the physical restrictions on two-way access, a socially distanced tour through the state rooms was not possible.
Miranda Rock, house director, said: "With a heavy heart and after much discussion about the practicalities of movement through the State Rooms, we have taken the difficult decision not to reopen the House to visitors this year. This conclusion was not reached without careful discussion and consideration of all the challenges that we would face in complying with social distancing. At the end of the day, a visit to Burghley is meant to be enjoyable and we did not feel that we could offer our visitors a high-quality experience."
The period of closure will be used to make sure that complex and time-consuming repairs are addressed so that upon re-opening, the house can continue to be enjoyed by visitors.
The gardens are currently closed due to the government guidance in regard to ticketed outdoor venues. This will be kept under review and, if possible, the gardens will be opened later on in the summer.
The parkland remains open daily from 7am to 6pm, free of charge. All other facilities are closed.