The Trees & Design Action Group, formed last year, is targeting designers, planners and developers with its first documents on trees in developments and the value of trees.
Sue James, an architect consultant for Capita Lovejoy, said the first two guidelines would be "unveiled as green papers" in Westminster next month.
"We want to challenge and then help change policy and tie it into local development decisions," she said.
Her group includes CABE Space, the Forestry Commission and the Landscape Institute as well as local authorities' researchers, insurance firms, developers and utility companies.
"If we act collectively we have more chance of changing policy because everyone is on a level playing field. This has not been the case before," said James.
"In the past, developers felt they were being held responsible and penalised financially for a lack of trees and greenery."
- See October's issue of Landscape Review
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