The garden and garden shop are set to reopen to the public on Sunday, April 25, with the house and gift shop looking to open later on in the season, at the end of June at the earliest.
Parham House said the opening dates are provisional and subject to Government guidance for easing lockdown restrictions.
Visitors will be expected to follow government advice regarding social distancing and will require face masks when indoors, unless exempt. Hand sanitiser will be available throughout the site and Parham will be operating as a cashless business - so all purchases must be made by credit or debit card .
A Parham spokesperson added: "We are also pleased to announce an exciting collaboration with local business The Naked Food Company, which will be offering our visitors a takeaway catering service from The Mower Shed in the Pleasure Grounds. Hot and cold drinks, light bites, cakes and afternoon tea boxes will be available. It will be possible for visitors to pre-order afternoon tea directly from The Naked Food Company - the link will be available on the Parham website. While there will be no indoor seating, there will be plenty of benches in our gardens.
"Please note that this will be the only catering available. The Big Kitchen will not be open."
All visitors will need to book tickets in advance from Tuesday, April 6 at: www.parhaminsussex.co.uk