Guidance for Developers: Network Rail Asset Protection headline planning and development considerations
Network Rail Asset Protection headline planning and development considerations – October 2026
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Introduction
This document provides a consolidated summary of the key Asset Protection (ASPRO) matters that should be considered when assessing development proposals adjacent to, or potentially affecting, the operational railway.
This document is for use as an early-stage prompt when reviewing development proposals. Requirements will depend on the location, scope, construction methodology and the potential interface with railway assets and operations.
This summary does not replace project-specific engagement, engineering review, legal agreements or formal Network Rail approval.
Detailed considerations
The following 34 considerations should be reviewed in proportion to the nature and risk of the proposed development.
1. Early engagement with Network Rail
We encourage developers to engage with Network Rail’s Asset Protection team at the earliest opportunity as planning permission is separate from any authorisation of works that may affect the railway; separate railway approvals may be required.
2. Asset Protection Agreements (Bapa/Apa)
Where proposals have the potential to affect the railway, developers may be required to enter into a Basic Asset Protection Agreement (BAPA) or Asset Protection Agreement (APA). Provided the agreement is executed the developer will then be responsible for Network Rail’s review, assurance, monitoring and associated costs.
3. Protection of Railway Operations
Development must not adversely affect the safe operation, integrity or future maintenance of the railway. Network Rail reserves the right to impose additional requirements where risks to railway infrastructure or operations are identified.
4. Encroachment
Development should not encroach onto Network Rail land or airspace. This includes (but is not limited to) foundations, balconies/cantilever features, temporary works or cranes. Future maintenance of proposed developments must be achievable without requiring access to Network Rail’s land.
5. Building Setbacks
Appropriate stand-off distances should be maintained between development and the railway boundary to allow safe construction, future maintenance and protection of railway assets. Larger clearances may be required in certain circumstances, such as near viaducts or electrified lines.
6. Restrictive Covenants and Property Rights
Developers should review title documents, covenants, easements and any historic railway demarcation agreements. Existing Network Rail rights and access arrangements must be protected and maintained.
7. Fencing, Boundary Measures and Security
Railway fencing and boundary measures must not be damaged, removed or altered without prior agreement, and Network Rail must retain access for inspection and maintenance. Where developments propose new fencing/boundary measures, the proposal should be reviewed to establish safety of the railway. This should include checking if the new boundary measure is robust and trespass-proof, whilst also meeting the appropriate heights for the topography.
8. Construction Method Statements (RAMS)
Detailed Risk Assessments and Method Statements are typically required for works close to the railway. These demonstrate how construction activities will be undertaken safely without affecting railway operations. If these are required for the proposal, a thorough review by Asset Protection must be undertaken to identify any risks to the railway and to assure risk mitigations proposed by the Outside Party.
9. Construction Plant, Cranes and Lifting Operations
Cranes, lifting equipment and mechanical plant must operate on a fail-safe basis to prevent collapse, oversailing or falling materials affecting the railway. Specific approval may be required for certain lifting operations. We require that there is at least a 4 metres distance between the compound collapse radius of the plant, and the railway boundary. We also require that the plant’s jib/arm does not point towards the railway at any point during its operation.
10. Scaffolding
Scaffolding near the railway should be designed and installed to prevent poles, materials or protective netting from oversailing or falling towards the railway. In instances where scaffolding is required next to OLE (Overhead Line Equipment), it is imperative that we inform the developer of the risks of electrocution and ask to see their plans. We require minimum distances from our OLE to allow for safe working as this can not only affect the operational railway but could also lead to serious injuries and in some cases death. For works that pose a risk, we would then ask to see mitigations such as bonding and potentially leading to isolation of the overhead lines before work commences.
11. Demolition Works
Demolition adjacent to or near railway land must be carefully controlled through agreed methodologies to ensure no adverse impact on railway structures, infrastructure or train operations. Risk of debris falling onto our land or track should be considered alongside the impact of the plant/methods being used. Dust can also be an issue with demolition works and this should also be kept to a minimum as to not affect the operational railway.
12. Excavations, Earthworks and Ground Levels
Excavation, reprofiling of land, retaining walls and changes in loading near the railway can affect ground stability and railway support zones. Such works will require assessment and agreement with Network Rail. If earthworks are proposed, we should like to see specifications of the works including but not limited to location and depths.
Deep excavation proposals close to the railway may require more detailed engineering review, including temporary works, dewatering, retaining structures and ground stability assessments.
Historic mining can also pose a risk to developments and the railway. Proposals in areas of mining risk should undertake a mining impact assessment to determine the level of risk, and further action may be required to ensure safety.
13. Piling and Vibration
Piling and other ground treatment techniques can transmit vibrations into railway assets. Developers may be required to demonstrate that vibration levels remain within acceptable limits and do not compromise railway infrastructure.
14. Buried Services and Ground Disturbance
Railway land often contains buried services and critical infrastructure. Utility searches, service detection surveys and appropriate excavation controls should be implemented before intrusive works commence.
15. Drainage and Surface Water Management
Development drainage must not increase flood risk, erosion, instability or water discharge onto railway land. Surface and foul water should be directed away from the railway and existing railway drainage systems protected. This includes, but is not limited to existing culverts, pipework and ponds. Connections or works affecting railway drainage require Network Rail approval.
16. Soakaways and Attenuation Features
Soakaways, detention basins and attenuation ponds close to the railway can affect ground stability and are often discouraged. Alternative drainage solutions may be required and agreed upon with a competent Network Rail drainage engineer.
17. Structural Stability and Support Zones
Network Rail does not generally provide rights of support for adjacent development. Developers must demonstrate that their proposals will not undermine railway earthworks, retaining structures or other assets.
18. Access to Railway Land
Railway access points, maintenance routes and operational access must remain available throughout construction and occupation. Any requirement for access to railway land is subject to Network Rail approval.
19. Noise and Vibration
Railway noise and vibration should be considered within design proposals, particularly residential development. Future occupiers should be made aware that rail activity may increase over time.
20. Lighting
External lighting must not interfere with railway signalling, train driver visibility or operational safety. Lighting should be directed away from the railway and avoid colours that could be confused with railway signals such as red, amber or green and any of their varying shades.
21. Landscaping and Vegetation
Tree planting and landscaping should be designed to avoid future interference with railway operations, signalling visibility, drainage systems and boundary fencing. Species selection and planting distances are important considerations and must be adhered to. The full list of accepted species will be included in the planning consultee response sent by the Network Rail Town Planning team.
22. Vehicle Incursion Protection
Proposals that may involve vehicular movements such as car parks, roads, garages and turning areas adjacent to the railway, may require vehicle incursion measures like barriers, crash protection or raised kerbs to prevent vehicles accessing or damaging Network Rail land. Developers may be required to carry out Road Vehicle Incursion assessments to determine the level of risk. If the results surpass the threshold of safety, then mitigation measures will be required.
23. Glint and Glare
Proposals that include the use of reflective materials such as glass, some metals and solar panels must demonstrate that reflected light will not adversely affect train drivers, signalling equipment or railway operations. A glint and glare assessment may be required, and a further signal sighting assessment may be needed based on the results of the first assessment. Proposals that include large quantities of water, such as reservoirs or outdoor pools should also be assessed for glint and glare impact.
24. Telecommunications and Electromagnetic Interference
Telecommunications equipment must be assessed to ensure it does not interfere with railway signalling, communications or operational systems. A competent Network Rail E&P engineer must review the works to ensure that the risk of interference is eliminated or can be mitigated sufficiently.
25. Level Crossings
Development should not increase risks at nearby level crossings or obstruct visibility of crossing infrastructure, warning signs or signals. This includes the risk of collision with OLE and traffic build-up. There must be sufficient clearance from the OLE and the vehicle moving underneath it. There may also be the risk of increased usage over time, such as for larger housing developments.
26. Abnormal Loads
Some proposals may include abnormal loads such as trucks/lorries being used for transporting cranes, transformers or wind turbines. These can be a risk to level crossing and bridges due to their weight or size or a combination of the two. These should be assessed for risk to our infrastructure and addressed accordingly. Where there is risk to the highways, the developer must contact the Local Authority for their transport routes to be assured.
27. Hazardous Materials
Storage and handling of hazardous substances near the railway must be carefully managed to avoid risks (including, but not limited to) fire, explosions, pollution or operational risks like smoke clouds. Environmental impact assessments may be required to determine the environmental impact of the materials and the subsequent storage.
28. Balconies, Roof Terraces and Public Spaces
Features overlooking the railway should be designed to minimise opportunities for debris, litter or objects being thrown onto the railway.
29. Utilities Crossing Railway Land
Any services, apparatus or infrastructure proposed to cross or occupy Network Rail land require separate approvals and legal agreements. This may also lead to further assurance processes to ensure that the project does not affect the integrity of the operational railway.
30. Monitoring and Survey Requirements
Network Rail may require monitoring of track, structures, earthworks or ground movement before and during construction. Developments must not impact the ability to do so. If the proposal may require monitoring or surveys, then Developers must be responsible for funding said monitoring and surveys.
31. As-Built Information
Upon completion, accurate records of installed infrastructure and services should be provided to support future maintenance, asset protection and safe management of adjoining land.
32. Climate Resilience
Development should consider the impacts of climate change, including increased rainfall and surface water runoff, to ensure risks are not transferred to railway infrastructure. Environmental Impact Assessments may be required by Network Rail to assess the environmental impacts of developments.
33. Developer Liability
Developers remain responsible for any damage, disruption, safety incidents or additional maintenance requirements arising from their proposal works and may be required to fund remedial measures where impacts occur.
34. Structures
Where proposals are located near Network Rail structures, the developer must not impact the integrity of the structure. There must also be sufficient clearance to maintain and inspect existing structures. Examples of structures include but are not limited to retaining wall, bridges, foundations, tunnels, viaducts.
Further information on Network Rail’s Asset Protection process, including contact details, is available at: https://www.networkrail.co.uk/our-work/looking-after-the-railway/asset-protection-and-optimisation/.