Christian Warman, director of Tedworth Property, said: ‘Square footage is particularly important in central London where prices are often quoted as price per square foot as well as the headline price. ‘It can be mis-leading as there are many other factors at play for property on the same street or in a similar location, such as orientation, aspect, floor level if an apartment, ambient noise and problem neighbours. ‘One of the biggest red herrings to ascertaining value on a price per square foot basis is not considering the volume or ceiling heights. As a rule properties with low ceilings will be significantly less valuable than those with high ceilings.’