Plans to add a single storey extension to a Grade II-listed, 18th Century Georgian mansion in Powys have been withdrawn.

A set of applications for planning permission to build a single storey, 197 square foot extension at Garthmyl Hall, near Montgomery, that were submitted in July have now been withdrawn.

The plans were submitted to Powys County Council by the Pugh family, proposing to replace a marquee which is used as a wedding venue there.

The withdrawal of the plans comes after some concerns were raised over the proposal, with several groups commenting on the extension.

Built Heritage Conservation Officer Sam Johnson said: “Garthmyl Hall is a significant and important mansion house, architecturally, aesthetically, socially and historically. Its gardens and confines are equally significant.

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“An extension is proposed on the site of a glasshouse. No record can be found of any approval for demolition of the glasshouse.

“The proposed extension is considered to be an unsympathetic addition which would harm the character and interest of the main building.”

Cadw, the Welsh Government's historic environment service, also took issue with the way the application was put together and the proposal itself.

They added: “We consider that the application is inadequately documented, and we recommend that additional information is required to enable a balanced decision to be taken against Planning Policy Wales, Technical Advice Note 24 Historic Environment and associated guidance.

“The application is inside the boundaries of the statutorily registered Garthmyl Hall historic park and garden and will have a direct impact on the formal gardens.

“We also have concerns that the currently proposed extension will have an impact on views between the house and the formal gardens and walled garden.

“A Heritage Impact Assessment prepared by Richard K Morriss and Associates has been submitted in support of this application, but this document does not acknowledge that the application area is inside the registered park and garden and fails to consider the impact of the proposed development on it.”

It is not currently known whether a new set of plans will be submitted in the future.