A North Acton student halls of residence was beaten by the Walkie Talkie to take home this year's Carbuncle Cup.
Woodward Hall, which is home to Imperial College London (ICL) students, made the shortlist and reached the final six of Building Design magazine's annual Carbuncle Cup.
But it was beaten by winner 20 Fenchurch Street, in the City of London - nicknamed the Walkie Talkie because of its bulbous, curving shape.
The 37-storey office tower was designed by architect Rafael Vinoly for developer Land Securities.
Jonathan Notley, a member of West Acton Residents' Association (WARA), branded Woodward Hall a "monstrosity".
He felt so strongly against the over-development of the area he ran as an independent candidate in the General Election and entered Woodward Hall into the Carbuncle Cup.
The Carbuncle Cup is an architecture prize, given annually by the magazine Building Design to "the ugliest building in the United Kingdom completed in the last 12 months".
Mr Notley, said: “I can understand why it won.
"I also think the Walkie Talkie is a terribly ugly building and it's definitely in the wrong place. If you look across the river from the City Hall side you've got the historic Tower of London and then you've got a wall of glass including the Walkie Talkie and it's just simply greed, none of the them should have been put there.
“It might have fitted in nicely in Canary Wharf, but not in the historic City of London.”
Mr Notley has pledged to continue his fight against inappropriate development in the Ealing area.
He added: “As much as I'd have liked North Acton to have won to really send a message, particularly locally in Ealing, about inappropriate development - I think on balance, the Walkie Talkie deserved to win it. It's such a high profile building next to an icon like the Tower of London.
“Whilst North Acton is an eyesore, it's an eyesore in context of 1930s semi-detached suburbia and I do think in any other year, North Acton would have won it so I'd like to think that North Acton might have come second.”
Building Design received multiple nominations for the Walkie Talkie with many readers saying there was no point in continuing to run new nominations as the Walkie Talkie was bound to win.
The judging panel was chaired by BD editor Thomas Lane and included writer, broadcaster and historian Gillian Darley, architectural designer Eleanor Jolliffe – both columnists for BD – and Ike Ijeh, the magazine’s architecture critic.
