We’re delighted to announce a new programme of seasonal and sustainable workshops for children and for adults, to give people the chance to get in touch with nature, recycle old furniture and decorate their homes. Take a look at our events page to see what’s on offer, and get in touch if you are a course provider looking for an inspiring eco venue to host your courses.
If this property’s share in a community-owned wind turbine were taken into account, it would have the lowest energy use and CO2 emissions of all properties in the recent Retrofit Revealedreport.
Two of HHP’s retrofit projects were included in a recent report by the Technology Strategy Board, and whilst the published results look good, they are not the full story due to the role played in our design by off-site renewable energy.
The Technology Strategy Board (TSB) funded the Retrofit for the Future competition to encourage innovation in the retrofit market and understand what actually works. 87 projects were awarded up to £150k each to retrofit social housing units, aiming to achieve an 80% reduction in CO2 levels compared to 1990 averages. HHP won funding for a project to retrofit 2 semi-detached houses in Newark, Notts, which have now been re-occupied for over 2 years.
The TSB has recently produced a report, Retrofit Revealed, providing the first analysis of data from the monitoring of 37 of the projects.
As we had split the (not inconsiderable) budget between two properties, we were pleased to see that one of our retrofitted houses (property number TSB023) still had the 8th lowest level of CO2/m2 (3rd best of the all-electric properties) whilst the other (property number TSB022) was a credible 26th. In terms of total energy use (per m2), our properties were 4th and 12th respectively. This shows the impact of being an all-electric property, as electricity has a much higher carbon intensity than gas; and the impact of resident behaviour, as the houses are built and retrofitted to identical specifications.
Our choice of going ‘all-electric’ was deliberate: it is not a finite resource like gas; and because our design off-set that electricity use through investment (from the project budget) in a local community-owned wind turbine.
The impact of this investment is not recognised by the TSB report but it has proven much more cost-effective and a lower maintenance approach than on-site renewables. Analysis of the energy data for Property TSB023, for which we have 2 years of meter readings, shows that if its share of SHOCK turbine generation were taken into account, it would have the lowest energy use and CO2 emissions of all properties. A £1,500 investment offset 43% of the annual energy use, and at the same time the social landlord has a regular income rather than a maintenance overhead.
This offsite offset would not be recognised in the properties’ Energy Performance Certificates (EPC) either. This matters because the Government said in their Energy Efficiency Strategy that it intends to make more policies conditional on energy efficiency. Onsite renewables would be recognised, but what about all those unable to install systems onsite due to property type, leasehold or planning restrictions? Or simply unable to afford an onsite system at higher upfront cost per kW?
Further key aspects of our design (passive solar gain, high thermal mass and buffer zones) are not fully recognised by SAP, the Government’s assessment tool, and so similarly the benefits would not be fully registered in the EPC.
Here’s hoping that TSB take a technology-neutral look at the results and feedback into SAP what really works for different properties, and their residents.
This week Kevin McCloud returned to the Hedgehog Project in Brighton on Grand Designs and showed how that housing co-operative has moved on from being an innovative self-build to building roots in the community – reflecting our experience here at Hockerton Housing Project.
We are hoping that the planners at Newark and Sherwood will have been watching, as a plan for a new self-build partnership in Hockerton is now under consideration. The plan is to demolish a redundant industrial building and replace it with five two-storey homes (up to 3 bedrooms) and two one-storey, one bed homes.
Hockerton Housing Project is supportive of the plans for a number of reasons:
The energy efficient design will deliver 80% less carbon and 60% lower running cost than homes built to today’s minimum standards.
Each dwelling will have a share in Hockerton’s community-owned wind turbine to ‘offset’ the carbon content of remaining energy use.
Rainwater harvesting and water efficient appliances will limit demand for mains water, and a reedbed will be used to avoid nasty odours from sewage.
Affordable housing allows people with a wider range of skills and expertise to live in rural areas.
The co-operative nature of the development, both in its build and its maintenance, means pride will be taken in the quality of the work on buildings and landscaping.
The more people resident in the village, the better for local businesses such as the farm shop, the pub, restaurant and ice-cream parlour.
Self-build partnerships are rare, but offer many benefits, so let’s hope the planning officials see the merit of putting brownfield land to better use as a site for new affordable homes in Hockerton, further strengthening the village’s reputation as a hub of innovative and affordable energy efficient homes.
If you are interested in understanding how we developed our self-build at Hockerton Housing Project, and how the co-operative works in practice, make a new year’s resolution to come on one of our Sustainable Living Tours – the next one is 19 January 2013.