Homes & housing

The human version (we wrote this, not the council)This section explains the district's housing need and sets out the housing allocations policy. The plan runs from 2026 to 2041 and uses the Government's standard method, which gives a need of 832 homes a year and a target of 12,480 homes. After counting existing planning permissions and an allowance for windfall sites, 10,312 homes must come from allocated sites. The policy safeguards allocated sites for housing, expects development broadly in line with each site's stated capacity, and only allows earlier release of sites if the five-year housing land supply falls short.

The human version (we wrote this, not the council)This section describes the district and the issues the plan must tackle. Three Rivers covers about 88 square kilometres on the edge of London, with around 93,800 residents in 2021, projected to reach 98,919 by 2041 alongside a fast-growing over-65 population. It is among the least deprived areas in England, though pockets of deprivation exist, notably in South Oxhey. House prices averaged £594,000 in October 2025, making affordable housing a pressing need. Around 76% of the district is Green Belt, car dependency is high, and the council declared a climate emergency in 2019.

The human version (we wrote this, not the council)This section introduces the strategic policies chapter through the spatial strategy, which directs growth to the edges of the district's larger settlements where services and transport are strongest. It explains that brownfield sites can deliver fewer than 700 new homes, so the plan provides for around 4,200 dwellings on land currently in the Green Belt. The council argues that exceptional circumstances justify changing Green Belt boundaries, citing the scale of housing need, limited brownfield land, acute affordable housing need and the extent of Green Belt cover.

The human version (we wrote this, not the council)This section sets out the spatial strategy in full. Growth is focused on edge-of-settlement sites next to the larger settlements, which the council judges the most sustainable and least harmful option after assessing all reasonable alternatives. A settlement hierarchy directs most growth to the principal town, small towns and large villages, while washed-over Green Belt villages take only 1 to 2% of housing growth. The plan requires significantly higher housing densities, especially near town centres and public transport, to reduce land take, and limits Green Belt release to what is needed with compensatory environmental improvements.

The human version (we wrote this, not the council)This policy sets the overall growth level for the plan. It provides for 468 dwellings a year, at least 7,017 homes over the 15-year plan period, delivered in line with the spatial strategy. This is below the Government's standard method figure of 832 homes a year (12,480 in total), which the council says cannot be met without unacceptable harm to the Green Belt, infrastructure and the rural road network. Employment uses on allocated sites are safeguarded unless their loss is robustly justified, and the council will consider an early review of the plan if more growth could be accommodated sustainably.

The human version (we wrote this, not the council)This section introduces the housing chapter. It explains that alongside a significant increase in the number of new homes, the district needs a balance of housing types, sizes and tenures to meet varied community needs and support sustainable, mixed communities. It also notes the district's ageing population, which means new development must include housing designed for older people and specialist accommodation to meet particular needs.

The human version (we wrote this, not the council)This policy requires new homes to deliver a balanced mix of sizes, types and tenures based on set percentages in the plan, with any variation needing clear evidence. Schemes of 100 or more homes must include a housing diversity strategy. All new dwellings must meet accessible and adaptable standard M4(2), and on sites of 10 or more homes a share must be built to wheelchair standard M4(3): 5% of market and 10% of affordable homes. Sites of 200 or more dwellings should provide 2% as self-build plots, and houses in multiple occupation must not harm local character.

The human version (we wrote this, not the council)This policy sets housing density expectations. New housing should normally be built at 50 dwellings per hectare within the developable area of a site, with higher densities expected in places well served by public transport, services and facilities. Lower densities may be acceptable in special cases, such as areas of historic or landscape value or specialist housing, but must be justified with supporting evidence. Density should generally be lower at the edges of a site and increase towards its centre.

The human version (we wrote this, not the council)This policy seeks at least 40% affordable housing on all development creating one or more extra homes, split 70% for rent and 30% for affordable home ownership. Major schemes in the Green Belt (10 or more homes, or 0.5 hectares or more) must provide at least 50%. Small sites of one to nine homes may pay a financial contribution instead. Affordable homes must look the same as market homes and be spread across a site. Most types are allocated to people with a local connection, and First Homes carry a permanent discount of at least 30%.

The human version (we wrote this, not the council)This policy requires all new homes to be net zero in operation. Dwellings must achieve at least a 63% improvement on the 2021 Building Regulations target emissions rate through energy efficiency, with fabric improvements from 12% for end terraces to 24% for flats. Meeting absolute targets of 35 kWh per square metre a year total energy, and 15 for space heating, earns positive weight. Fossil fuels and gas connections are ruled out except in exceptional cases, and on-site renewables must match predicted energy use, with offset payments a last resort. Larger schemes report energy data for five years.

The human version (we wrote this, not the council)This policy requires new non-residential buildings to be net zero for regulated energy, the energy used by fixed systems such as heating and lighting. Buildings must beat the 2021 Building Regulations emissions target by set margins: 25% for offices, 35% for schools, 45% for industrial buildings, 10% for hotels and residential institutions, and 35% for others. Absolute targets of 65 kWh per square metre a year, and 15 for space heating, are an alternative route. Fossil fuels are ruled out except in exceptional cases, on-site renewables must match energy use with offsetting a last resort, and larger buildings report energy data for five years.

The human version (we wrote this, not the council)This section introduces the plan's approach to accommodation for Gypsies, Travellers and Travelling Showpeople. National policy requires the housing needs of these groups to be assessed and planned for. The council will meet identified needs on suitable sites in sustainable locations and maintain a five-year supply of pitches and plots, guided by its Gypsy and Traveller Accommodation Assessment of July 2025. Existing sites will be safeguarded while need remains, and needs will be met through a mix of safeguarding, extending existing sites and allocating new ones.

The human version (we wrote this, not the council)This policy requires new development to provide waste and recycling facilities in line with the council's 2024 storage and collection guidance, sited so they are easy to access and do not harm the street scene or block sight lines. Development should reduce waste by reusing materials, enabling on-site sorting, using modern construction methods such as prefabricated and modular building, and providing proper storage for kerbside collection and composting. Major schemes must submit a Site Waste Management Plan including a Circular Economy Statement, and developers should consider extracting usable minerals from a site before building.

The human version (we wrote this, not the council)This section introduces the design and heritage chapter. The district's housing stock includes many larger detached and semi-detached homes on generous plots, making it popular with families, with relatively few flats. Its character is shaped by the Metro-land developments that followed the Metropolitan line, featuring Tudor revival and Arts and Crafts styles. The plan aims to increase density and deliver more one, two and three bedroom homes while protecting this strong local identity, and to keep living standards high through minimum space standards and controls on subdividing homes.

The human version (we wrote this, not the council)This policy governs the design and layout of residential development, requiring all schemes, including extensions, to meet the Design Criteria in Appendix 1. Development must not harm an area's character through tandem or backland building, poor access, excessive traffic or layouts out of keeping with plot sizes and street patterns. Tall buildings, meaning four or more storeys, over 12 metres, or substantially taller than neighbours, will be refused unless strict criteria are met. Converting a house into flats normally needs three or more bedrooms, and all homes must meet or exceed national internal space standards.

The human version (we wrote this, not the council)This section covers open space allocations. Public open spaces allocated in the 2014 Site Allocations document are carried over into this plan, and three new allocations are added: the open spaces linked to the two Warner Bros. Studios sites and the Suitable Alternative Natural Greenspace serving housing site H34 west of the Kings Langley Estate. Housing developments must contribute to open space and children's play space where the scale of development justifies it. The council will update its open space study after adoption, which may lead to further allocations.

The human version (we wrote this, not the council)This policy requires all development to be designed to promote healthy communities and reduce health inequalities. Schemes should provide open space, sport, recreation and cultural facilities, and safe walking and cycling routes. New health facilities should be located where there is a choice of sustainable transport. Allotments and community orchards are protected and food growing in new developments is encouraged. A Health Impact Assessment, a study of how a scheme affects people's health, is required for residential schemes of 100 or more homes and non-residential schemes of 1,000 square metres or more.

The human version (we wrote this, not the council)This section introduces the appendices to Part I of the plan and opens Appendix 1 on design criteria. It states that buildings, streets and spaces should be of the highest quality, with detailed guidance supplementing the plan's policies. Applications are judged on their own merits, so meeting the guidance does not guarantee approval, and standards may be relaxed in higher-density locations such as the principal town. It also defines habitable rooms as living rooms, dining rooms, shared kitchen-living spaces, studies and bedrooms.

The human version (we wrote this, not the council)This section sets out detailed design criteria for new homes, extensions and alterations. On privacy, it gives an indicative 22 metre separation between facing buildings, rising to at least 24 metres for taller blocks or those with balconies. It sets minimum garden and amenity space levels, for example 60 square metres for a three-bed house and 15 square metres for a one-bed flat. It also covers daylight, dual aspect homes, flats, extensions, including a 45 degree rule and 1.2 metre set-ins from boundaries, dormer windows, roof forms and bin and cycle storage.

The human version (we wrote this, not the council)This section explains how development in the Green Belt is assessed. New farm or forestry workers' dwellings must pass functional and financial tests, normally starting with temporary accommodation for the first three years. Extensions that increase a building's original floorspace by more than 40% will normally be treated as disproportionate, and replacement buildings must not be materially larger than those they replace, though small homes of 110 square metres or less get some flexibility. It also covers reuse of buildings, ancillary buildings and extending gardens, all judged against the openness of the Green Belt.