Dunmurry Tower Blocks Come Down: Demolition Begins on Seymour Hill Towers After Seven-Year Delay
After seven years of planning, legal wrangling, and repeated delays, demolition work has finally commenced on the Coolmoyne House and Rathmoyne House tower blocks in the Seymour Hill area of Dunmurry, south-west Belfast. The Northern Ireland Housing Executive confirmed last week that contractors are now on site at the 14-storey structures, which have stood empty for years following the evacuation of residents. The process is expected to take between 18 and 24 months to complete, with the cleared site earmarked for approximately 120 new social housing units.
Background
Coolmoyne House and Rathmoyne House were built in the 1960s as part of the post-war social housing expansion that transformed the landscape of greater Belfast. For decades, they provided homes for hundreds of families in the Seymour Hill area, a predominantly working-class community on the south-western edge of the city. But by the 2010s, the towers had become emblematic of the challenges facing Northern Ireland's ageing social housing stock: expensive to maintain, difficult to heat, and increasingly unsuitable for modern living standards.
In 2019, the Northern Ireland Housing Executive announced its £308 million Tower Block Action Plan, a comprehensive programme to address the future of 33 ageing tower blocks across the region. Coolmoyne House and Rathmoyne House were among the first to be identified for demolition, with an initial target date of July 2023 set for the start of work. That deadline came and went without a digger on site.
The delays were caused by a combination of factors. Legal proceedings over the removal of telecommunications masts on the roofs of both buildings proved protracted and expensive. Comprehensive surveys following the evacuation of residents revealed the presence of white asbestos — chrysotile — on every living level of both structures, necessitating a lengthy and delicate removal process before full-scale demolition could safely proceed. The NIHE also had to manage the acquisition of private leasehold properties within the blocks, adding further complexity to the process.
Key Developments
Demolition work officially commenced on Tuesday, 21 July 2026, with contractors securing the site and beginning the initial phases of the process. The work is being carried out in phases, with safety protocols in place throughout. The NIHE has confirmed that the full demolition is expected to take between 18 and 24 months, meaning the site should be cleared by late 2027 or early 2028 at the latest.
Local representatives, including Councillor Jonathan Craig and Councillor Nicola Parker, expressed both relief that the project is finally moving forward and frustration at the years of delay. "This has been a long time coming for the Seymour Hill community," said Councillor Craig. "People have been waiting for this for years, and it's good to finally see work beginning on the ground."
The cleared site is earmarked for the development of approximately 120 new social housing units, a significant addition to the housing stock in an area where demand for affordable accommodation remains acute. The NIHE has indicated that planning for the new development will proceed in parallel with the demolition work.
Why It Matters
The Dunmurry demolition is significant for several reasons. It represents the first major delivery under the NIHE's Tower Block Action Plan, a programme that has faced persistent criticism for moving too slowly in the face of urgent housing need. The 33 tower blocks identified in the 2019 plan represent a substantial portion of Northern Ireland's social housing stock, and the pace at which they are addressed will have a direct impact on the lives of thousands of residents across the region.
The asbestos issue, which caused significant delays at Dunmurry, is likely to be a recurring challenge at other sites in the programme. Many of Northern Ireland's tower blocks were built during the same era and using similar construction methods, meaning the lessons learned at Seymour Hill will be directly applicable to future demolitions. The NIHE has indicated that it is developing a more robust pre-demolition survey protocol to avoid similar delays elsewhere.
The replacement of 120 new social housing units on the cleared site is also significant in the context of Northern Ireland's housing crisis, where waiting lists for social housing have reached record levels and the supply of new affordable homes has consistently fallen short of demand.
Local Impact
For the Seymour Hill community, the beginning of demolition is a moment of genuine relief. The empty towers have cast a shadow over the area for years, and their removal will open up the site for the new housing development that local residents have long been promised. The demolition is also expected to have a positive knock-on effect for other nearby housing projects, including the eventual rehousing of residents from the Ferndale, Parkdale, and Riverdale tower blocks in the wider Dunmurry area. Translink's 9A and 9B bus services, which serve the Seymour Hill estate, will continue to operate normally throughout the demolition period, with temporary traffic management measures in place around the site.
What's Next
The NIHE expects the demolition to be completed by late 2027 or early 2028. Planning applications for the 120 new social housing units are expected to be submitted to Lisburn and Castlereagh City Council in the coming months. The NIHE has also confirmed that it will hold a community consultation on the design and layout of the new development, with residents and local representatives invited to contribute to the planning process. Progress updates will be published quarterly on the NIHE's website.
