The installer cannot start work until the voucher has been issued.
It will take about 10 days for the voucher to be issued from when you put the application in.
(For applications submitted in October there will be a longer delay in receiving your voucher as the Scheme Administrator is having to manually process the applications while their automated systems are developed. The first homeowners should have started receiving their vouchers towards the end of October.)
The government confirmed that as of 4pm on 20 October, the Green Homes Grant voucher scheme had received 20,903 applications since its launch.