Bosses at a housing firm have been ordered to flip around their homes after they built them the wrong way round.
Builders at Persimmon Homes, one of the UK's biggest developers, made the blunder while constructing 262 properties at a new housing estate in Colchester, Essex.
It has now emerged that the workmen built an entire block of one, two and three bedroom homes with the windows, doors and balconies the wrong way around. Yikes.
They must now reverse these fittings to comply with planning permission.
Colchester councillor Martin Goss said the 'major cock-up' from Persimmon Homes was 'mystifying'.
Mr Goss said: "It just beggars belief, how on earth can a developer build a set of flats the wrong way? It's mystifying.
"To build something completely the wrong way is a major cock-up. How can a national developer make such a major mistake?
"If a builder makes a mistake, they have to bear the consequences of that.
"It's gone through a long process and a number of iterations to get where it is today but obviously they now need to build it to the agreed plan."
A spokesman for Persimmon Homes said that some alterations had already been made to the homes in Colchester.
He said: "We have made some limited alterations to the position of some windows during the early stages of construction, in line with our planning consent."
Persimmon Homes has previously come under fire for other blunders, including a leaky sewage system that allegedly left a family in Derby covered in rashes.
Another alleged mistake saw a homeowner in Cardiff force the company to knock down and rebuild his walls that apparently contained damaged bricks.
And in Birmingham, one man claims to have been sold a four-bedroom home which ended up only having three. He went on to say that Persimmon refused to fix the problem.
According to the Mirror, the man - who has remained anonymous - noticed that the fourth bedroom was suspiciously small, measuring just 3.12 x 2.04 metres.
During his investigations, he went to the Valuation Office Agency and found that the house was registered as a three-bedroom home, not a four-bed.
When the man raised the issues, he says that he was told: "It won't be an issue when coming to sell as the average Joe doesn't look at council plans for the property."