Diamond Build Group Plc comprises three construction companies: Diamond Build Plc | Diamond Special Works Ltd | Diamond Fire ... Ltd - Diamond Build specialises in delivering construction projects of values £2m-£20m across London and the home counties. - Diamond Special Works undertake projects £2m and below, specialising in refurbishment of occupied premises and extensive maintenance type projects. - Diamond Fire Safety specialise in installation and replacement of fire doors, compartmentation, M&E and all requirements to ensure a building fulfils and exceeds building regulations. read more