Banned driver Pawel Karwat crashed in Harlaxton Road and was found to be almost three times over the drink-drive limit.
Karwat, of Heathersage Close, Grantham, admitted driving whilst disqualified and drink-driving after crashing a Fiat Seicento in the early hours of August 18.
Police who arrived at the scene found evidence the car had “rolled over or skidded along on its roof” due to substantial damage to the bodywork.
Karwat, 22, was given a breath test and blew 92 microgrammes of alcohol in 100 millilitres of breath. The legal limit is 35 microgrammes.
Kate Macmillan, defending, said: “Mr Karwat has recognised in recent days he does have an issue with alcohol. His mother in Poland has a long-term illness that has got significantly worse recently and he admits to using alcohol as an emotional crutch.”
Karwat, who is a factory worker, was told he will be sentenced on September 17.