Last updated: 8 December 2023

Next review: 13 October 2024

The Eco Show Home

Waltham Forest Council appointed partners Aston Group to manage the retrofit of a council owned property, into its first-ever eco show home. 47 Greenleaf Road is a typical Victorian terrace built in 1902. 

  • The annual heat demand from this home is estimated to fall from 17,219kWh to 7,995kWh per year.  And its EPC banding will rise from E to A.
  • Read details on the retrofit fact sheet and the Eco show home white paper.

The engagement programme

The Eco Show Home was open to the public between September 2021 and June 2022. The property saw over 2,900 visitors over the course of 265 tours of the property. Visitors included

  • 1939 visitors over 32 open events. The majority of open day visitors were owner occupiers (69%), with a small number of private landlord visitors (18%). 82% of open event visitors are Waltham Forest residents.

  • Central and Regional Government Politicians

    • Ed Miliband MP (Shadow Secretary of State for Climate Change and Net Zero)

    • Lord Callanan (Department for Business, Energy and Industrial Strategy)

    • Tom Copley (GLA Deputy Mayor for Housing and Residential Development)

    • Sem Moema (London Assembly)

  • 238 students from local schools and colleges. Students were from Waltham Forest College, London Academy of Sustainable Construction, Greenleaf Road Primary School, Heathcote School, and Leytonstone Sixth Form.
  • 31 officers from central government and regional government.
  • 129 officers from 17 housing associations. Visitors were from housing associations such as Clarion, Peabody, WFHA, Noting Hill Genesis, Swan, Metropolitan Thames Valley.
  • 124 officers from 15 London boroughs. Barking and Dagenham, Barnet, Bromley, Camden, Greenwich, Hackney, Haringey, Havering, Islington, Lambeth, Newham, Redbridge, Hammersmith and Fulham, Tower Hamlets, Westminster.
  • 43 visitors from 11 environmental organisations. This visitor figure included representatives from national organisations such as Carbon Trust and the Green Finance Institute. This visitor figure also included representatives from local groups such as Citizens UK and Transition Leytonstone.


The total property renovation cost around £114,000. Of this figure, around £64,000 was spent on retrofit measures. These costs are broken down into more detail below. The works were delivered by Aston Group and undertaken between 2019-2021. These costs may not be reflective of current market costs.

Measure Detail Supplier Cost
Internal wall insulation

56mm insulated plasterboard with twin coat plaster installed on the front facing wall ground floor, 1st floor, and loft.

Kingspan £4,486
External wall insulation 100mm external wall insulation to rear and side wall finished with top coat render. This figure includes all required plumbing works to accommodate for the external wall insulation e.g. remove and refit rainwater pipes. Saving Energy £10,099
Underfloor insulation Robotically installed underfloor insulation on the ground floor (excluding kitchen and utility area). Includes underfloor cavity survey. Q Bot £2,229
Loft insulation 270mm of mineral wool. Saving Energy £960
Double glazing Existing double glazing UPVC (unplasticized polyvinyl chloride) frames retained and existing glass replaced with soft coat Low E units. Grove Windows £1,317
Front door Replacement of existing wooden front door with new UPVC (unplasticized polyvinyl chloride) double glazed door.  


Air source heat pump system
  • aroTHERM Plus 7kw Air Source Heat Pump
  • 300 litre water cylinder
  • sensoCOMFORT wireless control pack
  • replacement of some radiators
  • installing a concrete pad for the heat pump.


Aston Group

Mechanical ventilation heat recovery system HRV Q Model Titon £3,870
Shower waste water recovery system Shower waste water recovery system installed in 1st floor bathroom. Zypho £1,977
Smart airbricks Four smart airbricks. Airex £750
Removal of existing heating system Removal of a gas boiler. Aston Group £303
Smart lighting system Smart lightbulbs and controls installed in every room in the house. Phillips Hue £2,300
Smart sockets Smart socket system installed in every room in the house. Lightwave RF £1,040
Solar panels Twelve solar panels and four batteries. Spartek *please note  £14,015
Scaffolding Scaffolding to install solar panels and external wall insulation.   £3,182
  • Energy performance certificate assessment
  • Thermal imaging
  • Air permeability test
  • Baseline noise survey
  • Plant noise assessment
  • Solid wall insulation guarantee agency certificate


*Please note Spartek have ceased operating in Waltham Forest.