• Aerial view of Bigbury Hollow, a PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Aerial view of our Bigbury Hollow, PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Aerial view of Bigbury Hollow under construction. Bigbury Hollow is a PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • A model of Bigbury Hollow, our PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Bigbury Hollow's feature window under construction. Bigbury Hollow is a PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Architects render of the kitchen at Bigbury Hollow, our PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Bigbury Hollow's feature window during early construction. Bigbury Hollow is a PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Architects scale model of Bigbury Hollow, our PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Aerial view of our Bigbury Hollow, PPS 7 underground house during early construction. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Architects render of the courtyard at Bigbury Hollow, our PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Section drawings of Bigbury Hollow, our PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Aerial view of Bigbury Hollow's two main structures during early construction. Bigbury Hollow is a PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Architects render of the master bedroom at Bigbury Hollow, our PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Plan drawings of Bigbury Hollow, our PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Drone image of Bigbury Hollow under early construction. Bigbury Hollow is a PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
  • Bigbury Hollow's bedroom wing under construction. Bigbury Hollow is a PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will utilize the latest renewable technology.
Bigbury Hollow, a PPS 7 underground house. Designed by Hawkes Architecture, this energy efficient timber-frame passive house will use the latest renewable technology.

Bigbury Hollow  PPS 7

The underground house, aptly named Bigbury Hollow, is flooded with daylight via two large terraced courtyards between the buildings two subterranean wings.

These terraced areas provide the PPS 7 home with plant beds for growing vegetables and culinary herbs. The sunken nature of the courtyards also helps conceal domestic furniture and prevent light pollution from the house at night.

The house is also equipped with a car lift which provides access to the underground garage and enables level access throughout the house. The impact on the environment is minimised by incorporating many state-of-the-art environmental building materials and techniques as well as various pioneering technologies to reduce the building’s carbon footprint and minimise its impact on the environment.

In association with:

Data

  • Location: Harbledown, Kent
  • Planning Authority: Canterbury
  • Consent: Granted 2012
  • Type of Project: PPS 7 New Build
  • Build Program: 36 Weeks
  • Gross Internal Floorspace: 400m²
  • Cost: £1.1m
  • Status: Under construction

Technology

  • 5.5 kW Photo-voltaic system
  • MVHR heat recovery ventilation system
  • Windhager biomass boiler
  • Eddi PV to DHW technology
  • Tesla Powerwall 2, battery storage
  • 220v Voltage optimisation
  • Joule thermal store
  • Borehole potable water supply
  • Rainwater harvesting
  • Triple glazed
  • LED lighting throughout
  • Electric car lift

Facts

  • Utilizing timber felled from the KWT clearing of Bigbury Camp
  • Will establish most of the site as a heathland habitat
  • Super insulated (300mm thick) timber frame building
  • U-values of 0.12 W/M²K
  • Locally sourced materials
  • Airtight = 0.6 air changes/hour @50pa
  • 24 kWh/m² annum heat load
  • 80 kWh/m² primary energy consumption
  • EPC: predicted A/A

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