Low-impact development (LID) has been defined as "development which through its low negative environmental impact either enhances or does not significantly diminish environmental quality".
The interplay between would-be developers and the UK planning authorities since the 1980s has led to a diversity of unique, locally adapted developments, often making use of natural, local and reclaimed materials in delivering highly affordable, low or zero carbon housing. These LIDs often strive to be self-sufficient in terms of waste management, energy, water and other needs.
There are numerous examples of LIDs throughout the UK, and local and national authorities have come to recognise the need for the concept to be incorporated into planning strategies.
Low-impact development (LID), in the UK sense of the term, was described by Simon Fairlie, a former editor of The Ecologist magazine, in 1996 as: "development that through its low impact either enhances or does not significantly diminish environmental quality." Fairlie later wrote:
"Neither the term nor the concept was new. People have been living low impact lifestyles in low impact buildings for centuries; indeed until very recently the majority of people in the world lived that way."
In 2009 Fairlie revised his definition of a LID as: "development which, by virtue of its low or benign environmental impact, may be allowed in locations where conventional development is not permitted." He explained:
"I prefer this revised definition because wrapped up in it is the main argument; that low impact buildings need not be bound by the restrictions necessary to protect the countryside from 'conventional' high impact development – a.k.a. suburban sprawl. There are two other principle arguments in favour of LID: (i) that some form of exception policy is necessary because conventional housing in a countryside protected from sprawl becomes too expensive for the people who work there; and (ii) soon we will all have to live more sustainable low impact lifestyles, so pioneers should be encouraged."
Others have expanded on the definition. A study by the University of West England acknowledged that: "LID is usually integrally connected with land management and as much as describing physical development, LID also describes a form of livelihood." However, it also states that as LID is a "multi featured and intrinsically integrated form of development," a simple definition cannot capture the meaning of LID and goes on to develop "a detailed themed definition with detailed criteria."
Dr Larch Maxey in 2013 held the main features of LID to be:
BedZED (London) is another example of a larger scale LID, which was built in 2000–2002 and has 82 homes, however it is not as affordable as many of the above examples as it was partly designed to attract urban professionals.
Findhorn Ecovillage has won a number of international awards. Steve James's Straw House, Dumfries was built for £4,000.
The House of the Future, Cardiff, completed in 2000, was originally a showcase of the latest green building technologies, and later transformed into an education centre.That Roundhouse (Brithdir Mawr, Newport, Pembrokeshire) was granted planning permission in 2008 with a review in 3 years. In West Wales, Lammas Ecovillage (near Crymych, Pembrokeshire) is a community of independent, off-grid households begun in 2009. Nearby Pwll Broga roundhouse is a development that was built without planning permission in 2012, refused retrospective planning permission in 2014, but granted permission in July 2015, having met the requirements of the Welsh government's One Planet Development (OPD) policy. From 2010 to 2019, 24 applications had been approved in Wales, with the majority in Pembrokeshire, but there has been criticism that the developments were not being properly monitored for compliance with OPD: in essence that "developers can show they can make a basic income off the land and provide all their own energy and water". According to the BBC, in 2019 there were 41 registered OPD dwellings in Wales, with a climate scientist claiming there was scope, in terms of available land, for up to 10,000 such developments.
In 2017, the term "eco-hamlet" was used to describe Pentre Solar, a development of six houses at Glanrhyd, near Llantood, Pembrokeshire; using locally-sourced timber, solar power and shared electric transport, the project was designed for local people on the council housing waiting list, and was supported by the Welsh Government. This was the first such project in Wales, and possibly in the UK, and was created by Western Solar, the company that established the first solar park in Wales, at Rhosygilwen, Rhoshill.
LID has also shown a capacity to enhance local biodiversity and public access to local space, and to produce traffic movements far below the national average. This has been attributed to lift-sharing, to residents' greater use of public transport, walking and cycling and to the integration of local land based employment with other household activities. As the Welsh Assembly Government has noted, such "...Development therefore is not just describing a physical development. It is describing a way of living differently where there is a symbiotic relationship between people and land, making a reduction in environmental impacts possible".
Over the years, there have been various struggles with planning authorities over LID in the UK. Tony Wrench spent over a decade fighting the planning authorities until he was granted planning permission for That Roundhouse. As Lisa Lewinsohn points out in her MSc thesis on LID, Tony Wrench and his partner Jane Faith have been "enforced against, fined, refused planning permission several times" while Lammas has "probably spent about £50,000 on the application process." Similarly, since 1986 Tir Penrhos Isaf has tried several times to get planning permission and only succeeded in December 2006, twenty years after their first planning application was submitted.
The residents of Tir Penrhos Isaf consider:
"that current planning and building legislation represent some of the greatest obstacles to developing sustainable systems in Britain. The legislation favours those who already have land and property, actively encourages the squandering of resources and environmental degradation and actively discourages movements towards low impact, sustainable development."
The extensive research interest in LID, backed up by the practical examples of the existing LIDs, has led to a growing number of planning policies in the UK designed to allow for LIDs. and the Welsh Assembly Government’s One Planet Development policy (OPD)  which is supported by the independent One Planet Council. The first development to receive permanent planning permission under the One Planet scheme was Nant-y-Cwm, near Caerphilly. The criteria for OPD in Wales include the requirement that 65% of all subsistence, or 30% of food and 35% of livelihood, come from the land.
^Maxey, Larch (December 2012). "Proof of Evidence of Dr Larch Maxey in relation to appeals APP/Y1138/ A/12/2181807, APP/Y1138/ A/12/2181808, and APP/Y1138/ A/12/2181821, evidence submitted to Mid Devon District Council planning inquiry" (PDF). Retrieved 7 March 2013.
^ abPickerill, J.; Maxey, L. (eds.). "What is Low Impact Development?". Low Impact Development: The Future in our Hands(PDF).
^ abcLewinsohn, Lisa (July 2008). "Planning Policy and Low Impact Developments – What are the planning barriers to low impact developments in rural areas in Britain and how might they be overcome?" (PDF). MSc Thesis, Advanced Environmental and Energy Studies, CAT. Retrieved 6 March 2013.
^Woolley, Tom (2013). Low Impact Building: Housing using Renewable Materials. Wiley-Blackwell. ISBN 978-1-4443-3660-3.
^Fairlie, Simon (1996). Low impact development : planning and people in a sustainable countryside (Repr. with minor rev. 1997. ed.). Charlbury: Jon Carpenter. p. xiv. ISBN 1897766254.
^ abcPickerill, Jenny; Maxey, L. (2009). Low impact development : the future in our hands(PDF). [Leicester: University of Leicester, Dept. of Geography]. p. 1. ISBN 978-1870474368.
^ abcUniversity of the West of England; Land Use Consultants (December 2002). "Low Impact Development – Planning Policy and Practice: Report to the Countryside Council for Wales" (PDF). Retrieved 7 March 2013.[permanent dead link]
^Maxey, Larch (2009). "The Future in Our Hands: Low Impact Development and Sustainability Transitions". Convergence on Zero Conference, Washington DC. Retrieved 7 April 2013.
^"Landmatters Coop gets planning approval!". Indymedia. 25 August 2007. Retrieved 7 March 2013.
^Monbiot, George (23 August 2004). "Living with the Age of Entropy". The Guardian. Retrieved 21 May 2013.
^Economads. "Tinker's Bubble". Retrieved 7 March 2013.
^"Transition and Permaculture". 1 March 2013. Retrieved 7 March 2013.
^Norwood, Graham (February 2013). "Co-housing: a lifestyle with community spirit built into the foundations". The Observer. Retrieved 7 March 2013.
^"Housing Minister and Kevin McCloud visit LILAC". Lindum Group. 1 April 2013. Retrieved 11 April 2013.
^Hill, Vicki (20 February 2008). "How I built my house for £4,000". The Independent. Retrieved 24 March 2013.
^Abby Alford (6 July 2009). "It's back to the future at St Fagans' hi-tech house". Wales Online. Retrieved 9 March 2016.
^Patrick Barkham (12 April 2009). "Round the houses". The Guardian. London. Retrieved 29 April 2019.
^Heydon Prowse; Tom Bell (22 March 2011). "Lammas: The eco-village that lives off the grid (video)". The Guardian. Retrieved 7 March 2013.
^"Family's roundhouse plans unanimously backed". Western Telegraph. 10 November 2014. Retrieved 10 November 2014.
^"'Hobbit home' to be demolished after Pembrokeshire vote". BBC. 1 August 2014. Retrieved 2 August 2014.
^"North Pembrokeshire family fight to keep roundhouse they built without permission". Western Telegraph. 22 March 2013. Retrieved 24 March 2013.
^"Couple win appeal to save 'hobbit home' in Crymych". BBC. 14 July 2015. Retrieved 17 July 2015.
^"Put a stop to eco-homes being built, says councillor". BBC News. 29 April 2019. Retrieved 29 April 2019.
^"Climate change: '10,000 families could live off-grid'". BBC News. 26 June 2019. Retrieved 26 June 2019.
^Steven Morris (6 January 2017). "Inside Glanrhyd, the first solar 'eco hamlet' in Wales". The Guardian. Retrieved 29 April 2019.
^Baker Associates (February 2004). "Low Impact Development – Further Research, report to the Pembrokeshire Coast National Park Authority" (PDF). Retrieved 7 March 2013.
^Various. "Index of Low Impact Documents on Lammas website". Archived from the original on 23 April 2013. Retrieved 7 March 2013.
^Lammas (2010). "Annual Monitoring Report For Tir y Gafel Ecovillage: August 2009 – January 2011" (PDF). Retrieved 7 March 2013.[permanent dead link]
^"Welsh Government's One Planet Development policy Development Practice Guidance". October 2012. Archived from the original on 10 April 2013. Retrieved 7 March 2013.
^"Roundhouse approved after decade". BBC News. 15 September 2008. Retrieved 6 March 2013.
^"10-year Pembrokeshire eco-battle ends". WalesOnline. 15 September 2008. Retrieved 6 March 2013.
^Barkham, Patrick (25 September 2008). "Round the houses". The Guardian. Retrieved 6 March 2013.
^ abDixon, Chris. "Planning History at Tir Penrhos Isaf". Retrieved 7 March 2013.
^Dixon, Chris (October 2009). "Planning latest at Tir Penrhos Isaf". Retrieved 7 March 2013.
^Fairlie, Simon (2009). Low Impact Development: Planning and People in a Sustainable Countryside. Jon Carpenter Publishing. Retrieved 7 March 2013.
Pembrokeshire County Council (June 2006). "Supplementary Planning Guidance: Low Impact Development – Making a Positive Contribution". Retrieved 7 March 2013.
^Welsh Assembly Government (July 2010). "Technical Advice Note 6: Planning for Sustainable Rural Communities – Section 4.15 One Planet Development" (PDF). Archived from the original (PDF) on 2 April 2015. Retrieved 6 March 2013.
^Welsh Government (January 2011). "Technical Advice Note 6 – Planning for Sustainable Rural Communities (2010)". Retrieved 6 March 2013.
^"One Planet Council: Nant-y-Cwm - a first for Wales". Retrieved 7 March 2015.
^"Owners of Pembrokeshire's threatened hobbit house plan one final throw of the dice to save their home". Wales Online. 14 May 2015. Retrieved 15 May 2015.
Bird, Chris. Local Sustainable Homes – How to make them happen in your community. Green Books, 2010  ISBN 9781900322768
Cotterell, Jane & Dadeby, Adam. The Passivhaus Handbook: A practical guide to constructing and retrofitting buildings for ultra-low-energy performance. Green Books, 2012.  ISBN 9780857840196
Evans, Ianto; Smith, Michael; Smiley, Linda. The Hand Sculpted House: A Practical and Philosophical Guide to Building a Cob Cottage. Green Books, 2010  ISBN 9781890132347
Jones, Barbara. Building with Straw Bales: A Practical Guide for the UK and Ireland. Green Books, 2009.  ISBN 9781900322515
Wimbush, Paul. Experience, Implications and Potential of Low Impact Development In Wales. University of Wales, Newport 
Wrench, Tony. Building a Low Impact Roundhouse. Permanent Publications, 2007.  ISBN 9781856230421
The Landmatters co-operative, Devon
LILAC – Low-Impact Living Affordable Community, Yorkshire
Tir Penrhos Isaf, Permaculture holding, Gwyedd, Wales
Simon Dale's houses, Wales
Steward Community Woodland, Devon
Cae Mabon, Eco Retreat Centre, Snowdonia
Keveral Farm, Cornwall
Down to Earth, Gower
LAND Centres, Permaculture Association – a list of publicly accessible land-based Permaculture projects in the UK
A map of LAND Centres in the UK – maintained by Permaculture Magazine
Supporting organisations and resourcesEdit
The Ecological Land Co-operative – supporting and enabling low-impact development in the UK
LILI – The Low Impact Living Initiative – a non-profit network of those involved with LID
One Wales : One Planet : The Sustainable Development Scheme of the Welsh Assembly Government
Does Welsh National Planning Policy effectively address Low Impact Development in the open countryside? – Paper by Louise Kulbicki
The Role of Scientific Knowledge and Other knowledge Types in Grassroots Sustainability Initiatives: An Exploratory Case Study of a Low Impact Development Eco-village in Wales – MSc thesis by Karolina Rietzler
The Land Magazine
Living in the Future – 50-minute documentary film telling the story of the "UK's first planned ecoVillage, Lammas."
Living in the Future website – A video series about Ecovillages – community and low impact living