Derelict dwelling demolished, two-storey extension added, house renovated

On 6 May 2026 the Mayo County Council granted conditional planning permission to Sean McGowan for a series of works at Cloonislaun in the townland of Ballina, Co Mayo. The application, reference 2660209, covers the demolition of a derelict dwelling and an outbuilding, the construction of a new two‑storey extension to the existing house, a major renovation that will alter the building’s external appearance, and the replacement of the current septic tank with a modern wastewater treatment system.

The council’s decision, received on 18 March 2026 and due on 12 May, was made after a review of the applicant’s plans and the relevant planning policies. The conditions attached to the approval are designed to ensure that the works comply with local development standards and environmental requirements. They include requirements for the design of the new extension, the use of appropriate building materials, and the installation of a proprietary wastewater treatment system that meets the council’s standards for effluent quality.

The demolition of the derelict structures is intended to clear the site for the new extension and to improve the overall safety and appearance of the property. The new two‑storey addition will increase the living space, providing additional rooms and potentially enhancing the value of the house. The renovation work will also update the façade, windows and roof, giving the dwelling a more contemporary look while respecting the character of the surrounding area.

The upgrade of the septic system is a key element of the proposal. The existing septic tank will be replaced with a modern wastewater treatment system that is designed to handle the increased load from the larger dwelling. This change is in line with the council’s commitment to protecting the local environment and ensuring that wastewater is treated to a high standard before it is released into the ground.

Sean McGowan’s application follows a number of other planning decisions in Ballina over the past week. On 12 May the council approved a new dwelling house and domestic garage with a wastewater treatment system at Foghill Upper Carrowmore, Lacken. Earlier in the month, on 7 May, a new single dwelling with a wastewater treatment system was approved at Doohoma, Ballina. On 1 May the council granted permission for a house extension and alterations with a new sewage treatment system, and on 13 May a similar application for a house extension and alterations plus a new wastewater treatment system was approved. These decisions reflect a broader trend in the area towards modernising existing properties and ensuring that new developments are equipped with efficient waste‑water treatment solutions.

The council’s decision for McGowan’s project was made in accordance with the Planning Act and the local development plan for County Mayo. The application was reviewed by the Planning Committee, which considered the impact of the proposed works on the surrounding neighbourhood, the visual character of the area, and the environmental implications of the new wastewater system. The committee concluded that the works would not adversely affect the local environment and that the proposed design was in keeping with the character of the surrounding area.

The approval also includes a requirement for the applicant to submit a detailed construction schedule and to keep the council informed of progress. The council will monitor the works to ensure that the demolition, construction and renovation are carried out in accordance with the approved plans and that the new wastewater treatment system is installed correctly.

The decision is part of the council’s ongoing efforts to support residential development in Ballina while maintaining high standards for environmental protection and community amenity. By approving the demolition of derelict structures and the construction of a modern extension, the council is helping to improve the quality of housing in the area and to ensure that new developments are sustainable and well integrated into the local landscape.

For further details on the planning decision and the conditions attached, readers can consult the original council file and the local news coverage of the approval.

Summary written by localnews.ie from the original source coverage. Click through for the full report.