The awards are in their 25th year and receive entries for 14 categories from businesses across North and East Yorkshire.
Green-tech goes up against Portakabin and Simpson (York) in the Large Business of the Year category. They will now be visited by judges to decide the overall winner, which is due to be announced at a black-tie dinner on 19 November.
Managing director Rachel Kay said; "We are thrilled to be a finalist in these prestigious regional business awards. Green-tech is a progressive business and we work really hard to offer our customers the best products, prices and service that we can.
"We are a large employer in this region and continue to invest in developing our people as well as the business. We are moving our entire operation next month to a new purpose built office and warehouse facility that we have commissioned close to the A1 motorway and have plans to expand the workforce further.