Prince Charles turned the spotlight onto the Dorset settlement by giving the politician a tour of affordable housing being built there as part of a 25-year construction plan.
During the tour, the Prince, Brown and key figures in the development looked around one three-bedroom flat earmarked for social housing.
David Morrish, joint managing director of Morrish Builders, one of the developers on site, said: 'Gordon Brown was particularly interested in the market and how sales are going. I told him it was picking up at the moment slightly.'
The project was conceived by the Prince to inspire town planning and design, as a solution to the problems highlighted by his own earlier criticisms of contemporary architecture and post-war development.
Poundbury was built as an urban extension to Dorchester on land owned by the Duchy of Cornwall.
Work began on the high-profile estate in 1993 and around 750 people now live there, with 2,200 homes to be built in total.