The family moving into this Victorian house knew the decor wasn’t quite right for them – they wanted a much warmer feel – but they did want to preserve the beautiful period features that made the building special.

Step forward Marius Juncu of design and build company Progressive Design London – who the couple contacted when they saw the firm’s previous projects on Houzz and read the many glowing reviews – and interior designer Sai Siddique of Sai Interiors, brought in by Marius...