Conservation of fuel and power: Approved Document L, Volume 1 — Dwellings

O N L I N E V E R S I O N Exemptions for listed buildings, buildings in conservation areas and scheduled monuments 0.8 Work to the following types of dwellings does not need to comply fully with the energy efficiency requirements where to do so would unacceptably alter the dwelling’s character or appearance. a. Those listed in accordance with section 1 of the Planning (Listed Buildings and Conservation Areas) Act 1990. b. Those in a conservation area designated in accordance with section 69 of the Planning (Listed Buildings and Conservation Areas) Act 1990. c. Those included in the schedule of monuments maintained under section 1 of the Ancient Monuments and Archaeological Areas Act 1979. 0.9 Work to a dwelling in paragraph 0.8 must comply with the energy efficiency requirements where this would not unacceptably alter the dwelling’s character or appearance. The work should comply with standards in this approved document to the extent that it is reasonably practicable. Historic and traditional dwellings 0.10 The energy efficiency of historic and traditional dwellings should be improved only if doing so will not cause long-term deterioration of the building’s fabric or fittings. In particular, this applies to historic and traditional buildings with a vapour permeable construction that both absorbs moisture and readily allows moisture to evaporate. Examples include those built with wattle and daub, cob or stone and constructions using lime render or mortar. 0.11 New extensions to historic and traditional dwellings should comply fully with the energy efficiency standards in this approved document unless there is a need to match the external appearance or character of the extension to that of the host building. The work should comply with standards in this approved document to the extent that it is reasonably practicable. 0.12 In determining whether full energy efficiency improvements should be made, the building control body should consider the advice of the local authority’s conservation officer. 0.13 Additional guidance is available in Historic England’s Energy Efficiency and Historic Buildings: Application of Part L of the Building Regulations to Historic and Traditionally Constructed Buildings. Exemptions for conservatories and porches 0.14 Where a dwelling is extended by adding a conservatory or porch, the work is exempt from the energy efficiency requirements, under regulation 21 of the Building Regulations, if all of the following apply. a. The extension is at ground level. b. The floor area of the extension does not exceed 30m2. c. The glazing complies with Part K of Schedule 1 to the Building Regulations. d. Any wall, door or window that separates the extension from the dwelling has been retained or, if removed, has been replaced with a wall, door or window. NOTE: Replacement walls, windows and doors should meet the requirement in regulation 23(2). See Section 10. e. The heating system of the dwelling is not extended into the conservatory or porch. Building Regulations 2010 Approved Document L Volume 1, 2021 edition 3 O N L I N E V E R S I O N