A 'once in a lifetime' home on an island off Northern Ireland is on sale for offers around £1,150,000. The five-bedroom detached house is one of only three properties on Cross Island in Strangford Lough. Strangford Lough is a tidal, salt water Lough in Country Down. The Lough contains more than 120 islands, mudflats, sand flats and lagoons. The house has been carefully designed to make the most of the panoramic coastal views outside and boasts large windows throughout. The property spans approximately 3,800 sq. ft. and sits in around three acres of landscaped gardens. It has its own private jetty with tram lines and a slipway, as well as a boat house, though the island is also accessible via a causeway. Unique: A five-bedroom house on an island off Northern Ireland is up for saleFor horse lovers, there are stables, a tack room and ample storage options. As well as multiple bedrooms, the main house has four reception rooms and four bathrooms. Internally, the property has largely been decorated in neutral tones, ensuring the focus stays on what is outside. Many of the rooms look out to the lawns to Strangford Lough, Bird Island, the Ards Peninsula and Mahee Island. Outside, there is also a revolving summer house to enjoy the coastal views from. Stamp duty for the property will start from £58,750, John Minnis Estate Agents, the firm selling the property, said. John Minnis, founder of John Minnis Estate Agents, told This is Money: 'Set on Cross Island, this is one of the most unique properties we've ever marketed. 'The home is one of just three residences on the island, offering a great sense of privacy and tranquillity.'He added: 'In terms of appeal, we would expect strong interest from buyers seeking a private coastal or countryside retreat, particularly those relocating for a quieter pace of life while still wanting access to nearby towns and Belfast. 'It would also suit families looking for a long-term home with generous accommodation, or buyers wanting a secure, low-density setting where space, outlook and privacy are the defining features. Views: The proeprty on Cross Island boasts panoramic coastal views throughout Tranquility: The house is one of only three properties on Cross Island Time for a trip: The house comes with its own private jetty Spacious: The house on Cross Island spans 3,800 sq. ft. Price tag: The home being sold by John Minnis is on sale for offers around £1,150,000 Rest up: The property has five bedrooms and four bathrooms Tasteful: The house has been designed with a neutral and relaxing interior What a location: Strangford Lough is a tidal, salt water Lough in Country DownHouse prices in Northern Ireland are typically lower than elsewhere across Britain. According to official data published in May, the average house price for Northern Ireland was £198,000 in the first quarter of this year, up 7.4 per cent, or £14,000, from the same point a year ago. Average monthly rent in Northern Ireland was £877 in February 2026, up 4 per cent, or £34, from a year earlier. Northern Ireland's annual inflation rate has been slowing since the record-high annual rise of 9.9 per cent, in April 2024, the Office for National Statistics said.Best mortgage rates and how to find them Mortgage rates have shot up again due to inflation triggered by the conflict with Iran reversing hopes that the Bank of England would cut rates. This means those remortgaging or buying a home face higher costs.That makes it even more important to search out the best possible rate for you and get good mortgage advice, whether you are a first-time buyer, home owner or buy-to-let landlord.This is Money's partner L&C can help you with its fee-free mortgage service.> Compare mortgage rates> Find the right mortgage for you To help our readers find the best mortgage, This is Money has partnered with the UK's leading fee-free broker L&C.This is Money and L&C's mortgage calculator can let you compare deals to see which ones suit your home's value and level of deposit.You can compare fixed rate lengths, from two-year fixes, to five-year fixes and ten-year fixes.If you’re ready to find your next mortgage, why not use This is Money and L&C’s online Mortgage Finder. It will search 1,000’s of deals from more than 90 different lenders to discover the best deal for you.> Find your best mortgage deal with This is Money and L&C Mortgage service provided by London & Country Mortgages (L&C), which is authorised and regulated by the Financial Conduct Authority (registered number: 143002). The FCA does not regulate most Buy to Let mortgages. Your home or property may be repossessed if you do not keep up repayments on your mortgage.