A public hearing to determine an appeal against a council's refusal of a 335-home development in Wymondham is to be held.

Hallam Land Management is challenging South Norfolk Council's ruling on an estate they want to build between London Road and Suton Lane. The council's planning committee earlier turned the application down because of a feared detrimental impact it would have on the 16th century grade II-listed Gonville Hall, in Suton Lane.

However, the council's development control committee has previously decided it would not contest the latest appeal, increasing the chances of the development going ahead.

Gonville Hall's owner, Margaret Mawson, said she continued to have concerns about the risk of flooding the development could create.

Mrs Mawson said: 'Suton Lane, which runs along the eastern boundary of the proposed development site, is frequently flooded in wet weather by water flowing from the surrounding farmland.

'This has markedly increased in recent years, presumably due to the commercial and residential developments already under way on land at the roundabout at the northern end of Suton Lane.'

At the time of the first decision, the council believed it had a five-year land supply – a government requirement to encourage house-building – but the authority has discovered that it does not, giving developers a much stronger position to see applications approved.

The plans also include a new cemetery and open space, which could be used for play areas.

An inspector appointed by Greg Clark, secretary of state for communities and local government, will decide the appeal.

The appeal hearing will take place at the council offices in Swan Lane, Long Stratton, on August 18 from 10am.