A retirement housing developer has moved into a new regional office in Colney Heath.

McCarthy & Stone plans to double in size and invest nearly £300 million in retirement housing in the region over next four years in land and build across 70 new sites, totalling 1,800 new homes.

McCarthy & Stone sold 1,527 units across the UK in 2013 and is looking to sell more than 3,000 units a year by 2018.