Westcott House, Chagford, Devon.

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The project was the refurbishment of a 1850 Victorian detached house within the Dartmoor National Park in Devon, UK. The Victorian detached country house located on Dartmoor underwent a complete refurbishment and energy efficiency upgrade. Because of its location within a national park strict regulations regarding any changes to the exterior appearance applied. The stone walls had to remain unchanged and windows had to resemble the original ones. All exterior walls were insulated and made air tight internally, windows replaced and a new MVHR system was installed. Because of its location and orientation and limitations to changes of the external appearance available solar gains were very limited.The holistic passive design strategy allows the existing property to be upgraded to a level of energy efficiency such that a conventional heating system will only be required in times of extreme winter conditions.
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Westcott House, Chagford, Devon. : Project images

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CO2 emissionsPrimary energy requirement
Energy target

Energy and fuel use

Fuel use by type
Primary energy requirement
CO2 emissions

Measured data from renewable generation is not yet available.

Fuel use

Electricity use - - -
Natural gas use- - -
Oil use- - -
LPG use- - -
Wood use- - -
Other Fuel - - -
Primary energy requirement - - -
Annual CO₂ emissions - - -
Annual space heat demand - - -

Renewable energy

Electricity generationForecastMeasured
Renewables Technology--
Other Renewables Tech--
Electricity consumed by generation --
Primary energy requirement
offset by renewable generation
Annual CO₂ emissions
offset by renewable generation

Calculation and targets

Whole house energy calculation method
Other whole house calculation method-
Energy target PassivHaus
Other energy targets-
Forecast heating load -


Pre-development air permeability test--
Final air permeability test--

Project description

Start date
Occupation date
Location Chagford Devon  England
Build typeRefurbishment
Building sectorPrivate Residential
Property typeDetached
Construction typeStone
Other construction typeFour different wall constructions were used to upgrade the exist
Party wall construction
Floor area 246
Floor area calculation method -
Building certification  Passivhaus certified building Passivhaus certified building

Project Team

Project lead person
Landlord or Client
ArchitectGale & Snowden Architects
Mechanical & electrical consultant
Energy consultant
Structural engineer
Quantity surveyor
ContractorBuilding Devon

Design strategies

Planned occupancy
Space heating strategy
Water heating strategy
Fuel strategy
Renewable energy strategy
Passive Solar strategy
Space cooling strategy
Daylighting strategy
Ventilation strategy
Airtightness strategy
Strategy for minimising thermal bridges
Modelling strategy
Insulation strategy
Other relevant retrofit strategies
Contextual information

Building services

Space heating
Hot water
Renewable energy generation system
Strategy for minimising thermal bridges

Building construction

Volume -
Thermal fabric area -
Roof description
Roof U-value -
Walls description
Walls U-value -
Party walls description
Party walls U-value -
Floor description
Floor U-value -
Glazed doors description
Glazed doors U-value - -
Opaque doors description
Opaque doors U-value - -
Windows description
Windows U-value - -
Windows energy transmittance (G-value) -
Windows light transmittance -
Rooflights description
Rooflights light transmittance -
Rooflights U-value -