Alton Greenhouses is part of the Compton Group of companies, comprising of Compton Buildings, Compton Commercial, Alton Greenhouses, Robinsons Greenhouses & Alton Victorian Greenhouses. Compton Buildings is a Marshalls plc specialist company, part of the Marshalls Mono Limited group of companies. Marshalls Mono Limited is a company registered in England & Wales under registration number 509579. Registered office: Birkby Grange, Birkby Hall Road, Huddersfield, West Yorkshire, HD2 2YA.