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






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