And so began the largest, most extensive renovation in museum history.

It has undergone extensive renovation and become a real gem.

Many homes have not undergone extensive renovation or repairs for 15 to 20 years and some are described as being in 'disgusting condition'.

But extensive renovation has realised the full potential of the area's handsome 19th-century buildings and it has become one of the capital's most desirable neighbourhoods.

Our building, however, would need extensive renovation.