Rights of light.

Initial feasibility, high-level and red-flag risk / cost appraisals

A rights of light appraisal at the outset can identify the potential constraints posed by surrounding buildings and inform the amount of design and commercial risk the developer is prepared to take. At this stage the objective is not necessarily a comprehensive model and long-form report; it is a proportionate assessment of foreseeable exposure, available information and critical unknowns.

We can help map likely affected interests, identify where further survey or title information may be needed, consider potentially constrained building envelopes, and discuss realistic options for managing risk and possible cost exposure. The findings may be supplied as a short risk note, red/amber flag review or project-team briefing.

Explore feasibility and red-flag appraisals across planning and rights of light ↗

Technical assessment

Once the brief and available evidence have been agreed, detailed three-dimensional modelling and technical analysis can quantify the effect of a development on neighbouring properties. We review the inputs, assumptions, relevant windows and spaces, and the significance of any identified reductions in light.

Technical findings are explained alongside their limitations, with further investigative work recommended where missing records, uncertain room uses or survey discrepancies could materially affect the advice. Modelling is a decision-support tool, not a substitute for judgement about the legal and commercial position.

Strategic risk management advice for developers

Where potentially material rights of light impacts are identified, we work with the developer, design team and appropriate legal advisers to consider the available responses. These may include targeted design amendments, further due diligence, negotiation with affected owners, acquisition or release of rights, or other proportionate mitigation.

Where strategically appropriate, we can assist with procuring a rights of light indemnity insurance policy through relevant brokers and advisers to address potential financial exposure. Suitability and terms depend on the circumstances, and insurance is not an automatic substitute for managing the underlying risk.

The aim is to ensure the team understands the options early, makes informed commercial decisions and avoids repeated abortive work.

Detailed reports

We prepare comprehensive, project-specific rights of light reports setting out the context, modelling basis, technical findings and considered implications. The scope and audience may vary between a developer’s internal risk assessment, funder due diligence, negotiations and formal proceedings.

Where feasible, relevant risks and design choices are discussed through interim advice before the detailed report is finalised, allowing the report to reflect the agreed scheme and risk management strategy.

Letters of Reliance

Where a report is intended to be relied upon by a lender, purchaser, funder or other third party, we can consider requests for a Letter of Reliance. This involves clarifying the identity of the relying party, the report and scope covered, and any relevant conditions and professional obligations.

Such letters are considered individually and issued only by agreement, rather than being assumed to extend to any party that receives a copy of a report.

Representation of owners affected by development

Hensey Consulting also advises property owners concerned that a neighbouring development may interfere with their rights of light. This is a distinct service from advice to the developer: we assess the potential technical impact, explain what it may mean for the owner’s property, and help identify the options for responding.

Where appropriate, we can assist with technical discussions and negotiation of financial settlements or other practical resolutions. Questions about whether a legal right exists, its enforceability, and the remedies available must be considered with specialist solicitors. Our advice provides the technical and strategic evidence needed to inform that process.

Coordinating legal and neighbourly advice

Land titles, historic deeds, easements, injunction risk and party wall matters can affect project strategy. We help identify information to be referred to suitably qualified solicitors and can assist in introducing experienced party wall and other neighbourly matters surveyors where their expertise is required.