- April 1983 Specialist Ducting Supplies Limited (SDS) commences trading.
- June 1983 the company is incorporated.
- July 1983 the company moved into its first industrial premises in Saltaire Workshops, West Yorkshire.
- January 1984 continued expansion required a move into larger premises in Mantra House, Keighley, West Yorkshire.
- November 1986 an expanding product range and the introduction of assembly work resulted in a further move to Becks Mill in Keighley, West Yorkshire.
- May 1990 purchased the current site of Craven House in Steeton, West Yorkshire.
- August 1995 SDS attains accreditation to its first quality standard BS EN ISO 9001.
- May 2006 SDS purchases PHD Ltd, who are based in Crowthorne, Berkshire.
- June 2009 SDS purchases its first injection molding machine.
- August 2013 SDS opens its manufacturing plant in Hillington, Glasgow.
- Additional injection molding machines were added in July 2018 and April 2023.
- December 2020 the redevelopment of Craven House is complete, providing additional warehousing space and an expanded office facility.
- June 2022 the purchase of larger factory premises in Hillington, Glasgow, provides an ideal base for the continued expansion of the manufacturing, product development and R&D aspects of the business.