As part of the new six-year contract, RA Venues will provide full catering services for day visitors in the Garden Terrace Tea Room, as well as the historic Barns Conference and Banqueting Centre. RA Venues will also cater for conferences and events held within the estate.
The caterer's "carefully curated" menus will feature seasonal ingredients from the Knebworth estate, grown within the vegetable and herb gardens, as well as Knebworth's own venison.
Steve Chandler, managing director of RA Venues, said: "As a leading historical venue, known across the country, we're proud to welcome the business into our portfolio.
"The estate grounds offer the perfect opportunity for us to create beautiful seasonal menus that build on the customer experience to ensure a truly memorable visit. It is also wonderful to be supporting so many quality local producers."
Martha Lytton Cobbold, managing director of Knebworth Estates, added: "We are delighted to be working with the industry leaders RA Venues to provide our public and event catering from 1st September, we will continue to base the catering operations at our historic Knebworth Barns and work proactively with our established professional team for event opportunities at Knebworth House, Barns, Gardens, and Park."
Knebworth House, located in Stevenage, Hertfordshire, is known for its live theatre and music. The venue also hosts weddings, special celebrations and corporate events.