Old Holloway

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A seductively simple self-build utilising an innovative pre-fabricated straw-bale/ timber construction. Perservering through a 4 year planning process, the single storey detached home sits snuggly within its rural surroundings.The proposal creates an informal courtyard utilising the existing huts on site and the dwelling an arrangement that is typical for the local area. The scale and massing of the simple single-storey detached dwelling, with pitched roof and south facing verandah, is sympathetic to local vernacular architecture.
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Old Holloway : 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 date01 November 2017
Location Little Birch Hertfordshire  England
Build typeNew build
Building sectorPrivate Residential
Property typeDetached
Construction typeOther
Other construction typeEcococon timber/ straw prefab panel system
Party wall construction
Floor area 95
Floor area calculation method Treated Floor Area (PHPP)
Building certification  Passivhaus certified building Passivhaus certified building

Project Team

Project lead person
Landlord or Client
ArchitectJuraj Mikurcik
Mechanical & electrical consultant
Energy consultantNick Grant & Alan Clarke
Structural engineer
Quantity surveyor
ContractorSelf-build, Mike Whitfield Construction Ltd

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 -