A developer proposes to address a lack of affordable housing by constructing a two-storey building with 35 rooms for lodgers, each fully furnished and equipped with a kitchen and bathroom facilities.

But Peter Polgar said the "new generation" boarding house proposed for a residential street in Allambie Heights, as well as others planned for Sydney’s Northern Beaches, will destroy the close community and village environment.

An artist's impression of a boarding house proposed for Allambie Heights. Credit:Walsh² Architects/Northern Beaches Council

Mr Polgar, a member of the Allambie Heights Action Committee, said the boarding house would lead to congestion as more people moved into the area.

“We do not have any idea of the type of characters to take up residency in these developments and, as they will be itinerant, no doubt with no community spirit or general feeling for the community at large, one would suspect,” he said.