Passivhaus is a fast growing energy efficiency standard with 30,000 properties realised to date. Passivhaus is based on a few simple principles – (1) to build houses which have excellent thermal perfo

  Dating from the 1860s, 100 Princedale Road in the Holland Park area of London doesn’t, at first glance, look to be much different from any of the other houses in the terrace. But it is. Octavia Hous