Tenants in more than 10,000 council-owned homes across the town have exercised their right to buy the properties.
Since the scheme was launched in 1980, Crawley Borough Council has sold 10,715 homes with a total market value of £574,347.692.
Only just over half of that money made its way into the council coffers due to discounts to tenants totalling 43 per cent or £247,979,891.
The figures were published in a report which went before a meeting of the full council on Wednesday (July 23) following a written question from Cllr Ian Irvine (Lab, Broadfield North).
They also revealed 753 of the homes were sold below the market value at the time they were purchased, leading to a total loss of £4,770,472.
The Housing Act came into force on October 3 1980 and by November 1982 the Government said more than 400,000 people nationwide had bought their council homes.
When it comes to the need for social housing in Crawley, the council currently has just over 2,500 people on its housing list.