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Replacement dwelling, The Chiltons

A five bedroom detached house. The design had to meet the exacting Chiltern’s Design Guide, addressing planning concerns on visual impact within its Green Belt setting. The house is a mix of lime render, brick slip with lime mortar, and oak feather edge cladding. There are also two traditional green oak verandas.

The house incorporates a ‘Glatthaar’ basement system which is within the Passivhaus envelope. Littlepits is now one of the most airtight houses in the UK at 0.07 ach @ 50Pa. Shortlisted for Association of Sustainable Building Products Awards 2019 (Excellence in Sustainability).

Passivhaus and Carbon/Energy statistics:

TFA: 317 m².
Building Form Factor: 2.43 with average wall and roof U-value 0.085 W/m²K, floor 0.07 W/m²K, and average installed whole window/door U values from 1.02-0.85 W/m²K.
Overheating percentage: 1%.
Predicted Heating Demand: 11.1 kWh/m².yr.
Heating load: 7.3 W/m².
AC/hr @ 50 Pa: 0.07

Windows and doors: Katzbeck

Construction by: Jigsaw Design and Construction Ltd

Completed: Dec 2017

Other projects

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Riverways

Devon

South Downs

Sussex

Blagden

Hampshire

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Passivhaus Trust Member
Anti-greenwash Charter - a structured framework to ensure transparent and honest environmental communications.
Buildoffsite Property Assurance Scheme (BOPAS) was developed to address the concerns and perceived risks associated with innovative construction. BOPAS is recognised by the principal mortgage lenders as providing the necessary assurance underpinned by a warranty provision, that the property will be readily mortgageable for at least 60 years.
certified passivhaus consultant
Buildoffsite Property Assurance Scheme (BOPAS) was developed to address these concerns and perceived risks associated with innovative construction. BOPAS is recognised by the principal mortgage lenders as providing the necessary assurance underpinned by a warranty provision, that the property will be readily mortgageable for at least 60 years.