RHS Wisley has set out concerns about the impact a planned nearby development of 1,730 homes could have on it in terms of noise, pollution and its visitors.

Details have been released of the inquiry that will take place into Taylor Wimpey’s appeal to build the homes on the former Wisley Airfield.

The site is across the A3 from the gardens, and close to the junction ten upgrade work being done on the A3 and the M25.

The developers appealed against Guildford Borough Council for not making a decision within a specified timeline, though the council said documents were submitted by Taylor Wimpey late in the process.

The appeal means the decision has been taken out of the borough council’s hands, and the application will now be decided by a government inspector after 24 days’ of hearings. The 24 days will not run consecutively.

Appeal documents show Wisley Action Group, Ockham Parish Council and RHS Wisley have submitted a joint statement of case document, setting out their thoughts on the application.

They describe the plans as “entirely unsustainable” both regarding the location and size of the development.

The statement said: “RHS Wisley is an internationally significant charitable scientific and destination garden which draws high levels of traffic each year. It has also been the subject of substantial investment in recent years.

“RHS Wisley has real concerns that transport impacts on this key historic facility has not been fully considered in the proposals, both in isolation and when combined with other development happening in the area.

“The impact of transport on the operation of Wisley will be felt in terms of visitorship and financially (as well as through pollution and noise on the heritage asset that includes the valuable plant collection).”

In terms of harm to heritage assets, the document lists the Grade II* Chatley Semaphore Tower, other Grade II-listed buildings and the Grade II* Wisley Gardens.

It said: “The harm will be increased in respect of RHS Wisley by the more open views caused by the extensive removal of trees for the M25 J10 project.”

Taylor Wimpey’s statement of case said the planned development would have “limited impact” on its surroundings and that the benefits “significantly and demonstrably” outweighed any actual or perceived harm.

The benefits of the scheme were highlighted, among others, as new and expanded bus routes and a network of cycle routes in the area, a net gain of tree cover across the site as well as protecting all ancient and veteran trees and reducing traffic through Ripley.

The full list of dates for the appeal is: today (September 28), October 10 to 13, 17 to 20 and 31, plus November 1 to 3, 7 to 10, 21 to 24 and 28.