The numbers were included in a performance report to a recent council policy committee.
In September 2017, the city council was deciding 92.54% of major applications within the government’s 13-week limit.
Whitehall expects 60% of decisions to be made inside this period.
In September 2015, Brighton & Hove was achieving just under 69%.
The speed of decisions on minor applications increased by 20% within a year to just over 80%, exceeding the government’s target of 70%.
The number of decisions being overturned by the government when an applicant appeals is also decreasing, with just 4.35% of major applications being overturned and 2.35% of minor applications.
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Major schemes approved in the area this year include the £300m redevelopment of the Preston Barracks and Brighton University car parks off Lewes Road, a 1,000-pupil secondary school and new primary at West Blatchington, a four-story A&E department at the Royal Sussex County Hospital and a new Life Sciences centre at the University of Sussex.
Planning committee chair CLLR Julie Cattell, said: “Thanks to the brilliant efforts of staff and some smarter ways of working we’ve made a big improvement in our planning service.
“We’re not complacent and know there is more to do.
“But we’re heading in the right direction.
“We’re highly aware how crucial a good planning department is in enabling growth and creating jobs and homes.”