Planning permission to erect a general-purpose builders' merchant warehouse is being sought from North Lincolnshire Council by Turnbull Timber, on Island Carr Road, off Bridge Street.
The business was established on this site in 1994 and has grown steadily.
A statement submitted with the application says the proposed building - 42m long and 18m wide - will help sustain existing employment at the site and "is likely to lead to increased employment in the immediate long-term."
Planners will now decide whether to grant permission.