A millionaire Labour Party donor’s plans to demolish a 19th century house in Highgate and replace it with a mock Jacobean mansion have been thrown out by the Planning Inspectorate.

Andrew Rosenfeld appealed to the inspectorate after Haringey Council failed to make a decision on his planning application in July last year.

The former property tycoon, who loaned £1million to the Labour Party before the general election in 2005, wants to knock down his arts and crafts style house in Broadlands Road and build a large symmetrical three-story house with a flat roof.

But a report from the inspectorate said the proposed building, which is located in a conservation area, “pays little regard to the character and form of other dwellings within the group and would fail to harmonise with the neighbouring properties”.

The application prompted opposition from neighbours, including former Labour deputy mayor of London Nicky Gavron, who claims she was not consulted about the plans which were “out of character with the rest of the street”.

But, Mr Rosenfeld argued there was little of the original arts and crafts building left and the new building would enhance the conservation area.

Michael Hammerson, from the Highgate Society, which opposed the planning application, welcomed the news and invited Mr Rosenfeld and his agents to sit down and discuss the proposals.

He said: “We are pleased the inspectorate agreed the design was not sympathetic or appropriate for the area. One would hope it would be the end, but at the very least we’d like the developers to come back to us.”

“Why not come back to us and discuss the plans properly?”

Montagu Evans, the property consulting firm representing Mr Rosenfeld on the planning application, was unavailable for comment.