Wilcon chief executive John Tutte said jobs had been axed across both companies where posts were duplicated. This includes Wainhomes' regional operations, mainly in the North and North-west, which were merged with Wilcon's.
He said there would be further job losses in middle management, although not a "huge number", and none at site level.
He said: "Where there was a double-up, we've looked at who was best suited for the job."
Wilcon chairman Allan Leighton said: "We always said there would be job losses." He said most of the managers who were losing their jobs would be told this week, but refused to give a final tally.
Tutte said the quality of Wainhomes' staff was one of the major advantages of buying the firm.
He said: "We are taking our time, using a consultative approach, to determine the structure of the newly merged regional businesses. This will lead to a limited number of job losses."
The Wilcon redundancies are the latest to hit housebuilding after a wave of consolidation. Persimmon has made up to 1000 Beazer staff redundant, Taylor Woodrow axed 150 jobs after it took over Bryant and Wimpey made 435 employees redundant following the merger of Wimpey Homes with McLean Homes.
Wainhomes chairman Bill Ainscough walked away with £44m for his 71% stake after Wilcon bought Wainhomes for £132.5m in April. Ainscough has joined Wilcon's main board as a director.
The deal gives Wilcon an extra 3400 plots with planning permission and another 7600 without. Wilcon's total landbank will grow to 38,000 plots, 18,000 of which have planning permission attached. Wilcon plans to create about 10 regions from the two merged businesses.
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