Three Rivers LPA BNG
Discover key habitats, BNG requirements, and planning guidance for developers in Three Rivers LPA Local Planning Authority.
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Biodiversity Net Gain in Three Rivers LPA Local Planning Authority
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West Berkshire, located in South East England, is a predominantly rural Local Planning Authority (LPA) known for its diverse natural environment and rich ecological heritage. Covering an area of approximately 704 square kilometres, the district includes a range of urban centres and rural settlements, with Newbury serving as the principal town. Other significant towns and villages within the LPA include Thatcham, Hungerford, Pangbourne, and Theale, each contributing to the area's distinctive landscape character and biodiversity value.
As part of its commitment to sustainable development, West Berkshire Council actively supports the implementation of Biodiversity Net Gain (BNG) in line with the Environment Act 2021. Developers working within the LPA are required to deliver a minimum 10% net gain in biodiversity value for most developments, secured through habitat creation, enhancement, or approved off-site units.
West Berkshire encompasses several National Character Areas (NCAs), notably the North Wessex Downs and Thames Basin Heaths, each influencing the typical habitat types found in the region. These include ancient woodlands, chalk grasslands, river valleys, lowland mixed deciduous woodlands, and floodplain meadows—many of which are priority habitats under the UK Biodiversity Action Plan. This ecological diversity presents both opportunities and constraints for BNG delivery, requiring careful ecological assessment and strategic planning.
For developers, landowners, and planners operating within West Berkshire, understanding the LPA’s landscape, habitat distribution, and regional policy context is critical to meeting BNG obligations. Our team provides tailored support through BNG assessments, habitat mapping, and access to verified local BNG units and schemes.
To learn more about BNG opportunities in this area, contact us or register to be notified when local schemes become available.
Three Rivers, located in southwest Hertfordshire, is a predominantly rural district with a mix of small towns, villages, and green belt land. Covering approximately 88 square kilometres, the district derives its name from the rivers Chess, Colne, and Gade that shape its landscape and ecological character.
Under the Environment Act 2021, Three Rivers District Council requires that most new developments deliver a minimum of 10% Biodiversity Net Gain (BNG). This can be achieved via on-site habitat creation, off-site biodiversity units, or investment in habitat banks, particularly within the district’s extensive green infrastructure network.
Three Rivers spans parts of two National Character Areas: Chilterns and Northern Thames Basin. These NCAs support a range of habitats including ancient woodlands, wet meadows, chalk streams, and hedgerow networks. Much of the district is designated as Metropolitan Green Belt, which places a strong emphasis on conserving biodiversity and ecosystem services.
BNG implementation in Three Rivers requires careful integration with the district’s landscape-scale ecological strategies, including Local Wildlife Sites, Sites of Special Scientific Interest (SSSIs), and protected river corridors. Early ecological input and robust habitat assessments are critical for meaningful delivery.
Our team supports developers, planners, and landowners in Three Rivers with BNG assessments, habitat baselining, metric calculations, and access to local BNG unit providers.
To receive updates or discuss BNG schemes within the district, feel free to get in touch.
Habitats in Three Rivers LPA Local Planning Authority
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West Berkshire’s landscape is shaped predominantly by the North Wessex Downs National Character Area (NCA 116), a chalk downland landscape of international ecological importance, and partly by the Thames Basin Heaths (NCA 129). These NCAs support a rich mosaic of habitats, many of which are priority habitats under BNG classifications and the UK Biodiversity Action Plan.
Grassland Habitats
Lowland calcareous grassland dominates the chalk ridge areas, supporting diverse plant species like orchids and wild thyme.
Lowland meadows are scattered along the Kennet Valley and floodplain, offering high biodiversity value, particularly for invertebrates and ground-nesting birds.
Areas of modified grassland are common in improved pastures and paddocks, but these hold lower BNG value unless enhanced.
In some acidic soils, lowland dry acid grassland and other lowland acid grassland can be found, especially on sandy substrates and heathland edges.
Woodland and Forest Habitats
The LPA contains extensive lowland mixed deciduous woodland, particularly on the clay-with-flints plateau and valley slopes, providing habitat for bats, dormice, and woodland birds.
Veteran trees and old estates feature wood-pasture and parkland, a rare and highly valued BNG habitat.
Areas of wet woodland, often associated with river valleys, add to the ecological complexity.
Heathland and Shrub
On the fringes of the Thames Basin Heaths, lowland heathland and mixed scrub are present, though often fragmented, supporting heathland birds like nightjar and Dartford warbler.
Wetland and Watercourse Habitats
The River Kennet, a designated Site of Special Scientific Interest (SSSI), provides priority river habitats and supports adjacent floodplain wetland mosaics.
Smaller ponds, reedbeds, and ditches are scattered across the landscape, particularly in floodplain areas.
Cropland Habitats
Much of West Berkshire’s agricultural land is under cereal crops or temporary grass and clover leys, but there is increasing scope to integrate arable field margins for biodiversity gain.
Hedgerows and Linear Features
The rural landscape is strongly characterised by native species-rich hedgerows, often associated with ditches and banks, which function as critical wildlife corridors under BNG classification.
Three Rivers’ varied topography and river systems give rise to diverse habitat types, many of which are high-value under the BNG metric and UK Biodiversity Action Plan.
Grassland Habitats
Lowland Meadows: Found in river valleys and floodplains, supporting floristically diverse grasslands and pollinators.
Calcareous Grassland: Occurs on chalk soils, especially in the Chiltern fringe areas.
Modified Grassland: Common on road verges, parks, and farmland, with enhancement potential.
Woodland and Forest Habitats
Ancient Semi-Natural Woodland: Extensive coverage in the west of the district, supporting bats, birds, and fungi.
Lowland Mixed Deciduous Woodland: Widespread throughout the Green Belt and protected sites.
Wetland and Watercourse Habitats
Chalk Streams: The Rivers Chess and Gade are globally rare chalk streams, rich in aquatic life and of high conservation value.
Floodplain Grazing Marsh: Associated with the Colne Valley floodplain.
Ponds and SuDS: Present in both rural and urban areas.
Cropland and Farmland Habitats
Arable Fields: Located mostly in the south and east; improvement potential through field margins, beetle banks, and hedgerows.
Temporary Grassland and Leys: With sympathetic management, these can provide biodiversity uplift.
Hedgerows and Linear Features
Species-Rich Hedgerows: Abundant in the rural landscape, providing connectivity for wildlife.
Riparian Corridors and Ditches: Support water vole, amphibians, and bird species.
Three Rivers LPA BNG Planning
For BNG delivery in West Berkshire, high and very high distinctiveness habitats such as lowland calcareous grassland, lowland meadows, wood-pasture, and priority rivers are particularly important to protect and enhance. Restoration or creation of such habitats provides the highest biodiversity uplift but also carries stricter requirements under the BNG metric.
Conversely, improving lower distinctiveness habitats, such as modified grassland or cropland through buffer planting, hedgerow enhancement, or field margin creation, offers practical options for on-site or local BNG contributions.
High distinctiveness habitats such as chalk streams, ancient woodland, and species-rich grassland are a focus for protection and enhancement. These habitats require strong baseline data and often off-site compensation when impacted.
Lower distinctiveness habitats like improved or modified grassland can be strategically enhanced through reduced mowing, native planting, and wet feature creation. These provide more flexible and cost-effective options for on-site BNG delivery.

Rickmansworth
South Oxhey
Chorleywood
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