1961 - Portakabin registered as a trademark and launches its original site accommodation building.
1965 - Portaloo launched - specialising in quality toilet and shower facilities.
1971 - Portakabin begins trading in the Netherlands.
1975 - Portakabin established in France.
1978 - Portakabin presented with Queen's Award for Export Achievement.
1980 - Yorkon launched - specialising in the design, manufacture and fit-out of high-quality modular buildings for prestigious projects in the private sector, healthcare and education.
1980 - Portakabin is awarded a BBA certificate for its Instant Building Module - the first to be awarded for a building module system.
1985 - Establishment of Portakabin in Belgium.
1992 - Portakabin presented with a Queen's Award for Technological Achievement.
1995 - Portakabin Events launched - specialising in high quality event hire solutions.
1998 - Lilliput nursery from Portakabin is the first and only modular building to be awarded Millennium Products status by the Design Council.
2000 - Portakabin launches Titan- the largest single modular building available.
2000 - Portakabin expands its 'one-stop-shop' service, with the establishment of air-conditioning and furniture hire businesses.
2000 - Portakabin purchases Foremans - specialising in the supply of quality pre-owned modular buildings.
2002 - Portakabin launches Ultima - the best performing office building for air leakage, as tested by the BRE.
2004 - Portakabin launches its unique Customer Charter - the first and only modular manufacturer to have such a customer service commitment.
2004 - Portakabin launches 5-year product and 20-year structural warranties on all products - the first and only modular manufacturer to have comprehensive warranty cover.
2005 - Portakabin launches Titan Building System- the fast, cost effective solution to quality space.
2005 - Portakabin launches Portaloo Junior - quality toilet facilities for key-stage 1 & 2 age children.
2005 - Luxe Showers launched - top of the range shower facilities for those extra special guests.
2005 - Foremans launch ConstructionSpace -specialising in the purchase and re-sale of second-hand modular and portable buildings for the Construction industry.
2005 - One-stop-shop solutions extended to include Protecta and our turn-key package, Total Solutions.
2006 - Portakabin purchases Allspace Limited - Ireland's largest supplier of modular and relocatable building systems for sale and hire.
2006 - Portakabin Datakom launched - networking solutions for your cabling and data-communication systems.
2006 - Yorkon introduces the Alpha demonstration building at the York manufacturing centre - enabling clients to see how a variety of options such as shaped modules, claddings and window types can be put into practice.
2006 - Yorkon wins Innovator of the Year - Specialist Contractor Awards.
2008 - Portakabin launches a range of biometric site access management solutions.
2008 - Portakabin is awarded Environmental Management System ISO 14001:2004.
2009 - The Portakabin Ultima, Titan and Solus buildings gained European Technical Approval (ETA) and were granted the right to bear the CE mark.
2010 - Portakabin launched the Portakabin Solus Energy-Saver packed with the latest energy-saving design features.
2010 - Portakabin reveals a new decant school solution incorporating generously sized double classrooms to highly specialised spaces.
2010 - Portakabin achieves a Dun and Bradstreet top credit score rating of 1, putting it in the top 15% of UK companies.
2011 - Portakabin celebrates 50 years of innovation
2011 - Portakabin opens its first assembly plant on the Continent bringing closer, more flexible and a more responsive service to Continental Europe.
2012 - Portakabin reaffirmes its position as the leading modular building specialist with an investment of more than £6m in a new state-of-the-art production facility at its international headquarters in York.
2012 - Portakabin launches the Ultima Building System producing buildings that can fit virtually any footprint. With long sweeping external walls without sections or columns the outside of the building is truly a blank canvas for the creativity of architects.
2012 - Portakabin launches WardSpace, a new range of options for standardised hospital buildings to help healthcare providers rapidly expand facilities.
2012 - Shepherd Group is ranked at number one in the yearly league tables of the Sunday Times top 250 mid-market private companies, based on sales.
2013 - Portakabin is awarded accreditation from safecontractor, a leading third party accreditation scheme, for its commitment to achieving excellence in health and safety.
2013 - Portakabin Wins Zero Waste Gold Award - the highest accolade for sustainable waste management.