Top storage tip #40:

Self storage units are quoted in square feet on the floor plan, but remember they’re usually 7-10 feet high inside.

The Self Storage Blog

Your search for self storage in County Durham has yielded the results shown here, and on any follow-on pages. Storage.co.uk has the most thorough database in the self storage industry, comprising nearly 1,200 self storage facilities around the UK.
To find the self storage facilities in County Durham that are closest to you, you can insert your postcode in the “Find Self Storage” or “Get a quote” functions on this website.