Double Storey House Extension, Double Storey Garage Extension and Loft Conversion, Gerrards Cross, South Buckinghamshire A double storey glazed atrium was created between the existing house and new double storey extension to allow light into the existing upper storey bedroom windows and ground floor kitchen. The masterbedroom area was located on the first floor and accessed via a glazed bridge. The stair was extended into the the loft area to create additional office space. The garage was demolished and enlarged to create a three car garage below and games room above.