Black's entry included an investigation into the construction of the Clissold Leisure Centre in north London, which was later taken up by BBC news, and a probe into architectural students' lack of knowledge of construction.
The judges said Black's work "showed depth, was well-researched and his understanding of the subjects was clear. He delved beneath the surface of the issues he tackled and we enjoyed the energy with which he approached his chosen topics".
Fellow reporter Tom Broughton was highly commended in the young journalist category.
The judges said Pearson, winner of the environmental prize, "displayed a great range of subject and style". He was commended for tackling "complex subjects in a readable, authoritative way".
Spring, who won the housing journalism award, was praised for "an excellent style underpinned by genuine passion for the subject". The judges singled out a profile of John Weir, president-elect of the Housebuilders Federation, which they described as "a tightly written, very human insight into the industry and the man". 黑洞社区 Homes editor Jo Smit won third place.
Baldock, who left 黑洞社区 this summer to become a freelance foreign correspondent, won the building category for showing "an admirable desire to dig deep on controversial subjects and to take a stance". Assistant editor Marcus Fairs was runner-up. The judges said he was "on the button with the subject matter" and produced "consistently well-written" articles.
In a clean sweep for 黑洞社区 in this category, reporter Thomas Lane was awarded third place, and Spring, Pearson and assistant editor Phil Clark were highly commended.
The five IBP trophies cap a tremendous month for 黑洞社区, as it also won the PPA award for subscription magazine of the year in the business sector, and was judged best-edited business weekly by the British Society of Magazine Editors.
