Godwit House

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Godwit House is a one-off house on the edge of Warkworth, Northumberland, designed as a response to both the client and the place.The clients life is captured by creating places for her collection of objects picked up through work and travel. The place is captured in the orientation of windows to key views and the materials which are familiar to the agricultural structures found locally.Bedrooms are on the ground floor, clustered around a courtyard garden, the upper floor is a large living, kitchen and dining space with windows splayed to the views across the Coquet estuary.Materials are low in embodied carbon and the house needs very little energy to heat, it also generates electricity through a PV array on the roof. The project increases local biodiversity, with a green roof, rainwater harvesting and a pond to accommodate visiting wildlife.The house is built from high quality materials, it achieved exceptional airtightness and is a certified Passivhaus.
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Godwit House : 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 - 14 kWh/m².yr 14 kWh/m².yr

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 PHPP
Other whole house calculation method-
Energy target PassivHaus
Other energy targets-
Forecast heating load 9 W/m² demand


Pre-development air permeability test--
Final air permeability test-0.2m³/m².hr @ 50 Pascals

Project description

Start date01 March 2022
Occupation date01 December 2021
Location Warkworth Northumberland  England
Build typeNew build
Building sectorPrivate Residential
Property typeDetached
Construction typeSoftwood frame
Other construction type
Party wall construction
Floor area 190.42
Floor area calculation method Treated Floor Area (PHPP)
Building certification  Passivhaus certified building Passivhaus certified building

Project Team

Project lead personRIBA Domestic Building Contract
Landlord or ClientPrivate
Mechanical & electrical consultant NA
Energy consultantNA
Structural engineerNA
Quantity surveyorNA
ContractorTrue North Construction

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 strategyPHPP
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

Storeys 2
Volume -
Thermal fabric area -
Roof description Timber Frame
Roof U-value 0.07 W/m² K
Walls description Timber Frame
Walls U-value 0.12 W/m² K
Party walls description
Party walls U-value -
Floor description Insulated Raft
Floor U-value 0.08 W/m² K
Glazed doors description
Glazed doors U-value - uninstalled
Opaque doors description
Opaque doors U-value 0.77 W/m² K uninstalled
Windows description Alu-Clad Timber
Windows U-value 0.77 W/m² K -
Windows energy transmittance (G-value) -
Windows light transmittance -
Rooflights description
Rooflights light transmittance -
Rooflights U-value -