A major development on the former Humbrol site in Hull has been completed eight years after the model-making factory closed down, the BBC has reported.
The £15m Marfleet Environmental Technology Park is already home to companies including Nippon Gohsei UK and Middlegate Shipping.
Hull council said it was the first part of a 484-hectare (1196 acre) enterprise zone to be completed in the city.
Developer Stoneferry Estates said the park would employ up to 200 people.
The factory closed in 2006 when Humbrol, the parent company of model-makers Airfix, went into administration.
It was the target of repeated arson attacks before Stoneferry Estates bought the site in 2007.
The 2.7-hectare (6.7 acre) site is part of the Humber Energy Cluster Enterprise Zone created for the offshore wind sector and associated businesses, which means it has cheaper business rates and lower levels of planning control.
In November, Stoneferry Estates is expected to start building a new office complex called Kingston Parklands on the site of the former Hull Maternity Hospital on Hedon Road.