This flat has everything you’d want in a period property ...
Messel and Beaton were in Vienna together, shopping for ‘cheap baroque chairs and consoles.’) And then there’s the exquisite hand-painted-by-Messel muralling and trompe-l’oeil: fanciful Chinoiserie ...
The reason for needing more space often defines whether you extend up or out? But if you're looking to add value, which one adds the most?