9 sq ft 3ft high locker 10 sq ft Telephone box size 15 sq ft 4ft high locker 20 sq ft Large walk in wardrobe size 25 sq ft Small garden shed size 30 sq ft Garden shed size 35 sq ft Standard garden shed size 40 sq ft Large garden shed size 50 sq ft Transit van size 75 sq ft Luton van size 100 sq ft Standard single garage size 125 sq ft Large single garage or 7 tonne lorry 150 sq ft One and half garages or 2 luton van loads 175 sq ft 7.5 tonne lorry size 200 sq ft Standard double garage size 250 sq ft Large double garage size 325 sq ft 3.5 single garages 400 sq ft 2 double garages 475 sq ft 2 shipping containers 475+ sq ft