Persimmon, Taylor Wimpey and Barratt Homes have sold 600, 173 and 477 homes respectively through the scheme, which opened to buyers last September.
The Department of Communities & Local Government does not have a current figure for total sales to date.
The £250m scheme, which was announced in the Budget in March, is jointly funded by housebuilders and the Government and provides a low-interest loan of 20 per cent of the cost of the house. It is available to FTBs buying newbuild properties with a 5 per cent deposit and an income of less than £60,000.
London & Country associate director of communications David Hollingworth says: “As awareness grows, you would expect the take-up to improve. I have no expectation there will be any spare money left.”