Duke Letting has won Gold in British Property Awards 2019-20.
The firm was judged best letting agent in Uckfield after being tested on its customer service by mystery shoppers.
The aim was to see how knowledgeable the team is and how they dealt with customers.
Proprietor Rod Carmichael said they had no idea they were being compared with other letting agents and it was wonderful to win the award.
He said: “We do have excellent staff. Everyone who works here has been here, and in the industry, for years.
“Together we have a vast amount of experience and we do regular training.
“It is the combination of the experience and knowledge of the industry that is reflected in how we deal with people and any problems that might arise.”
Rod said Duke Letting was a growing business involved in property and block management as well as letting.
He was pleased that most of their new instructions came through recommendation, which in itself was an accolade for the business.