From left, Valerie, Gearóidín, Maeve, Gerard and Denise Charlton at Dublin’s High Court for the Pat Kenny case

Social justice activist Denise Charlton has joined broadcaster Pat Kenny in opposing an apartment development in Dalkey, even though it is to be built on land owned by family members.

Charlton, a former chief executive of the Immigrant Council of Ireland, has lodged an objection with Dun Laoghaire-Rathdown county council against plans by Bartra Property to build 19 flats and seven houses on a 1.5-acre site encompassing her parents’ former home and a house owned by her sister, Gearóidín, a solicitor. She claims the proposed estate will devalue her nearby home at Bloyke Harbour.

Bartra, founded by property developer Richard Barrett, bought Maple Tree House at Bulloch Harbour last year from Charlton’s mother, Maeve, for €3.17m. Her solicitor father, Gerard, who had a boundary dispute