Over £1m will be spent this year bringing the total spend to date to over £1.8m with the remaining amount earmarked to be spent in the next 18 months.
The overall investment programme runs through to 2016 with a total planned investment value of £3.5m.
Mechplant has bought over 40 machines from dealer TCHarrison JCB over the last 18 months – mostly excavators of varying sizes and specifications and some rollers.
The next phase includes excavators, rollers, dumpers and telescopic handlers.
Steve Makinson, Joint Managing Director of Mechplant said: “Although the last four years have been very tough we are proud to be making this investment and to be investing in British manufacturing with JCB and trading with their local distributor, TC Harrison JCB.”