1977 Geoff Simpson and John Allinson built their first shed together.
1978 S & A Fabrications is launched.
Buildings were produced in a little garage, 1000ft above sea level. Everything was lifted in by hand and all the work was done in the doorway, one girder at a time.
1982 First Employee commenced work.
Andrew Wilkinson started work on the government's youth training scheme and remains to this day a valuable and loyal employee.
1983 Moved to Stainton Grove Industrial Estate, six times bigger.
1987 Bought one and a half acres of industrial land in Barnard Castle, which became Harmire Enterprise Park.
1988 Built own factory, which included a small 'hatch' where people could purchase steel sheets and timber. A preliminary foray into selling building materials.
1990 First extension to original building, four bays with two dedicated to trade/retail sales of building materials.
1993 Bought another three-quarter acre of land. Added a second extension to the original building with the Builders Merchants business doing well and the need for improved painting facility.
1998 The business became incorporated as Simpson & Allinson Ltd. S & A Fabrications was retained as one trading division and S & A Merchants was established, to develop the builders/agricultural merchanting business.
1999 Bought another three-quarter acre of land and built a dedicated Merchants building.
2002 Round livestock building idea conceived. This was a significant milestone for S & A.
2003 Third extension to the Fabrications building and the saw line within was another step in creating perfect flowline for structural steel. Bought second Merchants store.
2004 Roundhouse Building Solutions Ltd was established as the third trading division.
2006 The first Roundhouse production design was erected at Summerhouse in County Durham and S & A have now fabricated Roundhouses all over the UK.
2007 Industrial building sales collapse during the recession. Two-thirds of the business is re-established in the agricultural market.
2008 First Roundhouse sale overseas.
2010 First farm project over £1m.