40 Case studies Transforming Construction More Homes Through Manufacture A Housing Forum Working Group Report Case study 11 Enfi eld Small Sites, North London Contributed by Iain Stevens Airey Miller Partnership LLP iain@AireyMiller.co.uk Name of project: Enfi eld Small Sites Town or city: Enfi eld, North London Brief description: Seven schemes - Parsonage Lane, Jasper Close, Forty Hill, St George Road, Lavender Hill, Tudor Crescent, Holtwhites Hill - comprising 94 dwellings. Mix of houses and apartments for market rent, social rent and shared ownership. Total cost: Approximately £15m Average cost per unit: £160k Principal partners: London Borough of Enfi eld (client) Kier Project Investment (main contractor), Climate Energy Homes (principal contractor), Airey Miller (project manager / emplyer’s agent), HTA Design LLP(planning architect) BDG Design (executive architect) Length of time to build: 18 months (completion in December 2015) Briefl y describe the construction method Offsite manufacture has been used, in the form of the EcoTech Timber Frame system supplied by Climate Energy Homes, to provide high quality, sustainable housing on time and in budget. All dwellings were constructed to Code for Sustainable Homes Level 4; however, the system lends itself to achieving all code levels, zero carbon and passive houses. Why was this method chosen? The EcoTech system was chosen to achieve high sustainability and quality levels whilst achieving a fast delivery programme to compliment the PRS approach. How did costs compare with traditional methods? Costs were comparable to traditional construction and the EcoTech System provides long-term benefi ts in terms of whole life costs and running costs for energy bills. Would you use this method again? Yes, and the Enfi eld Small Sites project is currently being extended to provide an additional four schemes. What are your reasons? To achieve high quality and swift project delivery and allow the client to use the private rental market income to generate funds for future development in the borough. Were there any diffi culties with the method chosen? There were design challenges with tailoring the traditionally designed scheme approved by planning with the EcoTech system but this is being successfully overcome.
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