New data from the Ministry of Housing, Communities and Local Government (MHCLG) showed that 57,485 affordable homes were built over the period.
This is up by more than a fifth on the previous year, and is the highest figure since 2014-15.
It also represents around a quarter (23 per cent) of the total number of new homes completed in the period. The MHCLG noted that this proportion has varied significantly since 2006-7, from a peak of 40 per cent in 2010-11 to a low of 16 per cent in 2015-16.
Two thirds of the new affordable homes were for rent, a proportion which has been falling since 2014-15, when it was 78 per cent.
More than nine out of 10 (92 per cent) of the affordable homes delivered were on new builds, a similar proportion to previous years.
There were also 61,056 starts on sites in England in 2018-19, up by 10 per cent on the year before.
