The human version (we wrote this, not the council)This section sets out the site allocations for Abbots Langley and Leavesden. Eleven housing sites are allocated, references H1 to H11, with a combined indicative capacity of around 550 homes. They range from small garage courts of five or six homes to larger sites such as land adjacent to Fraser Crescent and Woodside Road, with 249 homes, and land at Mansion House Equestrian Centre, with 98. Each site table sets out size, phasing, Green Belt status and requirements covering matters such as access, heritage, flooding and trees.
OpenConsult / Three Rivers Plan Explorer
Transport & travel
Roads, rail, buses, walking and cycling, parking, EV charging and major schemes such as East West Rail and HS2.
224 sections of the plan, in document order.
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 sets out the vision for Three Rivers as a desirable, prosperous district with sustainable settlements, a resilient economy and a high quality environment moving towards zero carbon. It lists the strategic objectives needed to deliver this, including a range of new homes with priority for rented affordable and family-sized housing, matching new jobs to new homes at a 1:1 ratio, making best use of previously developed land, and integrating infrastructure and sustainable transport. Other objectives cover heritage, climate change, biodiversity, open space, the district's rivers, good design, an ageing population, health and safeguarding the Green Belt.
The human version (we wrote this, not the council)This section sets out the site allocations for Bedmond. Three sites are allocated for around 138 homes in total: Church Hill Road (102 homes), 56 High Street (20 homes, with possible commercial space) and North Cott, East Lane (16 homes). All three are classed as grey belt land and remain within the Green Belt. Requirements include access improvements, heritage assessments near listed buildings, surface water flood mitigation and protection of trees covered by Tree Preservation Orders.
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 policy embeds the national presumption in favour of sustainable development, meaning the council takes a positive approach and works with applicants to approve proposals wherever possible. All development must address a list of sustainability aims. These include cutting carbon emissions to help reach the council's net zero ambition by 2030 for its own emissions and district-wide net zero by 2045, avoiding flood risk, prioritising brownfield land, providing mixed housing including affordable homes, supporting town and village centres, locating development to reduce travel, delivering infrastructure, good design and managing pollution.
The human version (we wrote this, not the council)This policy requires all new development to achieve high quality design that strengthens local distinctiveness and creates a sense of place, with poor design refused. Schemes must respond to local character, make efficient use of land, and connect well to existing streets. A landscape-led approach is required, including tree-lined streets, with landscape schemes and at least five years of maintenance plans. Development must protect neighbours' amenity, design out crime using Secured by Design principles, be accessible to all, and provide appropriate parking, cycle storage and refuse facilities.
The human version (we wrote this, not the council)This section sets out the site allocations for Chorleywood. Eight housing sites are allocated, references H18 to H26 (there is no H19), with a combined indicative capacity of around 217 homes. The largest are Land at Chorleywood Station (81 homes), North Hill Farm (57 homes) and Hill Farm, Stag Lane (40 homes); the smallest include garage sites and Chorleywood Library at five homes each. Site tables cover size, phasing, Green Belt or grey belt status and site-specific requirements such as access, heritage and flood mitigation.
The human version (we wrote this, not the council)This section sets out the site allocations for Croxley Green. Five housing sites are allocated with a combined indicative capacity of around 300 homes. The largest are Land at Croxley Station on Watford Road (163 homes) and Cinnamond House (80 homes), alongside smaller sites at garages off Grove Crescent (19), Land at Barton Way (8) and Land South of Scots Hill (30). Each site table lists size, phasing, whether land is greenfield or brownfield, Green Belt status and detailed requirements for future applications.
The human version (we wrote this, not the council)This policy keeps Rickmansworth town centre and the district centres of South Oxhey, Chorleywood and Abbots Langley as the focus for shops, leisure and other town centre uses. Ground floors in primary shopping areas must keep active frontages that support the centre's vitality, while homes above shops are supported in principle. Local centres should meet day-to-day shopping needs. A retail impact assessment is only needed for schemes of more than 2,500 square metres of new retail floorspace outside the defined retail hierarchy, and shop fronts should suit the character of the area.
The human version (we wrote this, not the council)This section sets out the site allocations for Garston. One site is allocated: Land North of Bucknalls Lane, a 5.8 hectare site for housing and employment with an indicative capacity of 144 homes. The northern part of the site is to be used for employment. The land was removed from the Green Belt during the plan process. The site table also sets out phasing and the constraints, such as buffers and flood mitigation, that any future application must address.
The human version (we wrote this, not the council)This section sets out the site allocations for Hunton Bridge. A single housing site is allocated: Land at Mill Place, with an indicative capacity of 10 homes. The site table records its size, phasing and Green Belt status, together with the site-specific requirements and constraints, including access, heritage and flood risk matters, that future proposals must take into account.
The human version (we wrote this, not the council)This section sets out the site allocations for Kings Langley. Four housing sites are allocated with a combined indicative capacity of around 520 homes. The largest is West of the Kings Langley Estate at 400 homes, followed by land adjacent to the RES site at Egg Farm Lane with 100. Two small sites, Flower House on Station Road and Lonsdale on Hyde Lane, provide 10 homes each. The site tables set out size, phasing, Green Belt status and requirements covering matters such as access, heritage, flooding and biodiversity.
The human version (we wrote this, not the council)This section sets out the site allocations for Maple Cross. Three sites are allocated with a combined indicative capacity of around 1,635 homes. Most come from one strategic site, Land to the West and South of Maple Cross, allocated for up to 1,500 homes plus supporting uses including a primary school, community, retail and commercial space; this land was removed from the Green Belt. The other sites are Land to the North of Chalfont Road (130 homes) and garages behind Longcroft Road (5 homes).
The human version (we wrote this, not the council)This section sets out the site allocations for Mill End. Four sites are allocated with a combined indicative capacity of around 548 homes. The main site is Land to the South of Shepherds Lane and East of the M25, a 20.8 hectare grey belt site for 520 homes plus supporting uses including gypsy and traveller pitches, a medical centre or GP surgery, extra care housing and public open space. The remaining sites are small: garages behind Drillyard on West Way (6 homes), Quickwood Close garages (16) and garden land off Uxbridge Road (6).
The human version (we wrote this, not the council)This policy tackles embodied carbon, the emissions from making, transporting and assembling building materials. Major schemes of 10 or more homes or 1,000 square metres or more of non-residential floorspace must complete a whole-life carbon assessment using RICS guidance. Large-scale schemes of 50 or more homes or 5,000 square metres or more must limit embodied carbon to 600 kgCO2e per square metre of internal area. Buildings should be designed for easy disassembly and material reuse, major schemes involving existing buildings need pre-demolition audits, and smaller schemes must explain how they have minimised embodied carbon.
The human version (we wrote this, not the council)This section sets out the site allocations for Oxhey Hall. Two housing sites are allocated with a combined indicative capacity of around 108 homes: Vivian Gardens (8 homes) and Land at Hampermill Lane (100 homes). The site tables set out size, phasing and Green Belt status, along with the site-specific requirements and constraints that future planning applications must address.
The human version (we wrote this, not the council)This section sets out the site allocations for Rickmansworth. Six sites are allocated: four housing sites providing around 151 homes, including the Affinity Water Depot on Church Street (75 homes) and a depot at Stockers Farm Road (40 homes), plus two care home sites. Land on London Road is allocated for a 75-bedroom care home, counted as equivalent to 40 dwellings, and Meresworth for a 51-bed care home, equivalent to 27 dwellings. Site tables list size, phasing, Green Belt status and site-specific requirements.
The human version (we wrote this, not the council)This section sets out the site allocations for Sarratt. One housing site is allocated: Adams Nurseries on Church Lane, with an indicative capacity of 15 homes. The site is classed as grey belt and remains in the Green Belt, and development should be limited to the brownfield part of the site, with amenity space and biodiversity net gain on the greenfield areas. The site table also covers access constraints and other requirements for future proposals.
The human version (we wrote this, not the council)This section sets out the site allocations for South Oxhey. Four housing sites are allocated with a combined indicative capacity of around 200 homes: Northwick Day Centre on Northwick Road (50 homes), the former Sir James Altham School (30), Pinewood Lodge (40) and Land South of St Josephs (80). Each site table sets out size, phasing, whether the land is brownfield or greenfield, Green Belt status and the site-specific requirements future proposals must meet.
The human version (we wrote this, not the council)This policy manages flood risk and water use. Development in flood risk areas must pass national tests that steer building to the safest available land, and no new development is allowed in Flood Zone 3b, the functional floodplain. Floor levels in Flood Zones 2 and 3 must sit at least 300mm above predicted maximum flood levels, and major schemes need sustainable drainage limiting runoff to greenfield rates. Buildings must stay 10 metres from main rivers and 5 metres from other watercourses. As the district is seriously water stressed, new homes must use no more than 110 litres per person per day.
The human version (we wrote this, not the council)This policy prevents development that would cause, or be harmed by, unacceptable pollution, covering land contamination, air, water, noise, vibration, light, odour and land instability. Building on or near former landfill or suspected contaminated land is only allowed where there is no threat to future users or to groundwater. Development must not worsen air quality, particularly in the district's two Air Quality Management Areas near the M25 at Chorleywood. Noise-generating and noise-sensitive uses must be kept apart or mitigated, and external lighting must be the minimum needed, avoiding harm to neighbours, wildlife and the countryside.
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 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 policy protects the district's heritage, including 352 listed buildings, 22 Conservation Areas, Scheduled Monuments, registered parks and gardens, and locally important buildings. Applications affecting a designated heritage asset must include a Heritage Statement explaining the asset's significance and the proposal's impact. Substantial harm to or loss of listed buildings and other designated assets will be refused unless substantial public benefits outweigh the harm. In Conservation Areas, development must preserve or enhance character and appearance, with strict tests for demolition, and reuse of historic buildings to help tackle climate change is supported where significance is not harmed.
The human version (we wrote this, not the council)This section sets out the retail hierarchy and centre allocations. Rickmansworth Town Centre is the principal shopping and service centre, serving the whole district. South Oxhey, Abbots Langley and Chorleywood are district centres, while Croxley Green (Watford Road and New Road) and Mill End (Money Hill Parade) are local centres, with smaller parades serving day-to-day needs. New retail development will be directed to the primary shopping areas of the town and district centres first. The boundaries of these centres are set out in the allocations.
The human version (we wrote this, not the council)This policy controls adverts, signs and shop fronts. They must not harm the character of an area or building through poor size, design, colour or materials, and must not put pedestrians or road users at risk. Flashing signs and lighting that causes light pollution for nearby homes or wildlife are not allowed. Signs should normally sit within the premises they relate to, avoid adding to clutter, and respect listed buildings, conservation areas and other heritage assets.
The human version (we wrote this, not the council)This section introduces the transport chapter. It explains that good road, rail, bus, walking, cycling and digital links are vital to the district's economy, environment and social wellbeing. Car ownership in Three Rivers is high, traffic is forecast to grow by 15.6% by 2031, and there are existing congestion problems. The plan aims to put new development where people can realistically use public transport, walking and cycling, working with Hertfordshire County Council, National Highways and other transport providers.
The human version (we wrote this, not the council)This policy requires new development to be located where sustainable travel is realistic. Schemes must support walking, cycling and public transport, with safe direct routes, secure cycle parking and good access for buses. Developments generating significant traffic must provide a Transport Assessment or Statement and a Travel Plan showing how impacts will be managed. Improvements will be delivered directly or funded through Section 106 agreements or the Community Infrastructure Levy, which are payments developers make towards infrastructure. Moving freight from road to rail or canal is supported in principle.
The human version (we wrote this, not the council)This policy sets parking rules for new development. Parking must follow the standards in Appendix 3, including zone-based reductions in areas well served by public transport. In major schemes of 10 or more homes, 20% of spaces should be unallocated, supported by a parking management plan. Parking areas must not harm road safety, a building's setting or the character of an area, and need soft landscaping and surfaces that manage rainwater. Electric vehicle charging points are required, and car clubs are supported in suitable locations.