Welcome to the Low Energy Building Database, a repository of low-energy building information created to help inform the planning and development of low energy new build and refurbishment

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LEB News

Low Carbon Domestic Retrofit Guides

Low Carbon Domestic Retrofit Guides : The Institute for Sustainability produced a set of guides based on the experiences of the Retrofit for the Future programme. They detail the business opportunities that retrofit offers, and provide practical and commercially focused … Continue reading

Retrofit for the future

The Retrofit for the Future competition catalysed the retrofit of over 100 homes across the UK, with an ambition of achieving an 80% reduction in the in-use CO2 emissions of each property. Coordinated by the Technology Strategy Board , the … Continue reading

Low Energy Buildings is re-launched

Welcome to the  new and improved Low Energy Buildings website. This site contains information about energy efficient building projects in the United Kingdom, both  refurbishment and new-build projects. The site aims to  provide information about  techniques, strategies and materials involved … Continue reading

About the LEB

During 2009-2010, the Technology Strategy Board implemented a £17m programme known as Retrofit for the Future (RfF), to kick-start the retrofitting of the UK's social housing stock. AECB – the sustainable building association was asked to develop appropriate energy performance targets for the competition and provide ongoing support and guidance. The AECB and the TSB have developed this database as an education and dissemination tool, incorporating both the RfF projects as well as new and refurbished domestic and non-domestic low energy buildings. Find out more about the LEB


Charts of Primary Energy use , CO2 emissions and Airtightness compiled from aggregate data of all LEB projects.   read more

LEB Technical reference

This section of the website aims to explain  some of the issues surrounding Low energy building projects whether they are  refurbishment  or new-build projects . Energy performance ...read more

Eco Hub at Lordship Recreation Ground, Haringey, London

The new Eco-Hub is the centrepiece of the regeneration and transformation of the historic Lordship Recreation Ground, and has been designed to exemplary sustainable standards. Commissioned by Haringey Council and funded by the Heritage Lottery Fund Parks for People programme, Big Lottery and the Greater London Authority. It will provide teaching space for environmental education, a multi-purpose community space for community organisations including the Lordship Rec mother and toddler group, a public cafe near the playground and the lake, with kitchen and public WCs, and a boot room for Park volunteers. From the outset, detailed consultation with Friends of Lordship Rec, local user groups, environmental education teachers and officers at LB Haringey, helped develop a pragmatic building brief and set out the core aims of community involvement and a truly sustainable building design for the Eco-Hub. Local people joined the construction team to build the strawbale walls.

AECB Silver Standard certified building

Withy Cottage

Timber Frame & Straw Bale self build with thermal bridge free construction (other than door and window frames). Simple flat raft foundation on EPS.

Dartmouth Avenue

The first of three schemes undertaken by Greenoak Housing Association and architect Jon Broome. The aim was to develop a replicable model to reduce emissions and other environmental impacts in mainstream housing by incorporating cost effective and trouble free measures. The emphasis is on reducing energy demand by creating a well insulated and airtight envelope. The properties in this development range in size from 80m2 2 bed dwellings to 108m2 4 bed dwellings. The average floor area and energy use per dwelling has been used in this entry.

Grove Cottage

Extension & Refurbishment of Victorian Townhouse using Passivhaus methodology and CarbonLite guidance. Certified to the Passivhaus Institute's new EnerPHit (refurbishment) Standard. [NEW:Passivhaus Trust awards shortlisted project - presentation available on these pages].PHPP certification is based on 20 C, rather than the 21 C the house was heated to during 2010/11. Forecasts are based on a 'typical year' rather than the 'actual' year being monitored. Measured data here is from 2005/06 (before) and 2009/10 (after). Measured room temperatures show an average of 21 degrees centigrade during the heating season. Please note the final air leakage as certified under EnerPHit was an N50 of 1.0 ACH. When adjusted for 2010 average monthly temps.& an internal temp. of 21 C, PHPP predicted a space heat demand of 36kWh/m2.a whereas 35kWh/m2.a was measured.

Passivhaus certified building

Low Energy Home - Hay Tor

Energy upgrade of 1950's concrete bungalow. We were trying to achieve the best available insulation (u-values) in all areas and good airtightness within budget restrictions. We are very pleased with the result just over a year after the start of the Retrofit, which makes the home much more comfortable.

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