29 January 2026 · Delegated - Principal Planner (A Morgan, Interim Director of Planning and Building Control)
Bishopscourt Mansion House, Bishopscourt, Kirk Michael, Isle Of Man, IM6 2ez
The proposal involves extending and altering a modern 2001 garage block within the grounds of Bishopscourt Mansion House (Registered Building RB1) to create an indoor swimming pool pavilion with associated plant rooms in the basement, using a metal-framed conservatory-style glass structure sympathetic to Victorian elem…
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The officer judged the proposal meets the statutory test in s16 of the Town and Country Planning Act 1999 as 'the setting of the registered building would be preserved' because the existing modern gar…
Strategic Policy 4
Requires proposals to protect or enhance the fabric and setting of Registered Buildings. Officer assessed that the proposal improves upon the unsympathetic existing garage with a more sympathetic Victorian-style extension, preserving the setting despite reduced separation to 20m.
General Policy 2
Requires development to respect site/surroundings in siting, scale, form, design, landscaping; not adversely affect landscape character or amenity. Existing garage fails these tests; proposal improves design/form/scale to accord, with no amenity or locality harm in private estate.
Environment Policy 1
Implied protection of ecology/wildlife/habitats. Conditions ensure lighting/landscaping levels protect site's ecology, following DEFA consultations.
Environment Policy 2
Protects Areas of High Landscape or Coastal Value (site designated High Landscape Value). Siting within existing garage and works' nature mean no harm to landscape character/quality.
Time limit
The development hereby approved shall be begun before the expiration of four years from the date of this decision notice. Reason: To comply with Article 26 of the Town and Country Planning (Development Procedure) Order 2019 and to avoid the accumulation of unimplemented planning approvals.
Landscaping scheme
No development shall be commenced until a hard and soft landscaping scheme has been submitted to and approved in writing by the Department. Such a scheme shall include details of all walls, fences, trees, hedgerows and other planting which are to be retained; a planting specification, and a programme of implementation. All works shall be carried out in accordance with the approved details. The works shall be carried out in accordance with the programme agreed in writing with the Department. Any trees or plants indicated on the approved scheme which, within a period of five years from the date of planting, die, are removed or become seriously damaged or diseased shall be replaced during the next planting season with other trees or plants of a species and size to be first approved in writing by the Department. Reason: To ensure the provision of an appropriate landscaping scheme that will prevent adverse impact on the site's existing wildlife and habitats.
Lighting scheme
No development shall be commenced until a lighting scheme has been submitted to and approved in writing by the Department. Such a scheme is to follow best practise as detailed in the Bat Conservation Trust and Institute of Lighting Professionals Guidance Note 8/23 on Bats and Artificial Lighting (2023), include internal and external lighting, and include a programme of implementation. All works shall be carried out in accordance with the approved details. The works shall be carried out in accordance with the programme agreed in writing with the Department, and to be retained in full thereafter. Reason: To ensure the provision of an appropriate lighting scheme that will prevent adverse impact on the site's existing wildlife and habitats.
Glazing details
No development shall be commenced until details of the proposed glazing been submitted to and approved in writing by the Department. All works shall be carried out in accordance with the approved details, and to be retained in full thereafter. Reason: To ensure the glazed portion of the building will not result in adverse impact on the site's existing wildlife and habitats.
No highways interest
No objection subject to conditions on lighting, shrub planting and glazing (final stance 16.12.2025)
No objection subject to note on Minerals Act (9 January 2026)
DEFA Energy & Minerals Team requests a material management plan and minerals consent for the proposed underground excavation, highlighting potential royalties under the Minerals Act 1986.
Key concern: significant underground excavation requiring material management plan and minerals consent
Department of Environment, Food and Agriculture (DEFA) Energy & Minerals Team
we request that this application be supported by a material management plan detailing the material likely to be encountered, information on how the ground conditions have been assessed and the proposed means of exporting the material; All minerals existing in their natural condition were vested in The Department of Trade and Industry (now DEFA) under the Minerals Act 1986 (as amended); if any minerals are to be removed from the curtilage of the surface holder's landholding, it is a requirement that you must contact DEFA's Energy & Minerals Team and obtain consent
Conditions requested: material management plan detailing the material likely to be encountered, information on how the ground conditions have been assessed, proposed means of exporting the material, expected quantities, and confirmation that a minerals agreement will be sought should the Department's minerals be encountered; contact DEFA's Energy & Minerals Team and obtain consent if any minerals are removed; mining permission application if minerals are intersected
