Hillingdon's character runs from suburban Edwardian and Victorian housing across Uxbridge and Ruislip to active Crossrail-driven regeneration at Hayes and West Drayton, with the Heathrow fringe and outer-London suburban estates filling much of the borough. Almost all the older stock carries windows that have received natural light for well over the 20-year easement threshold under the Prescription Act 1832, which means town centre redevelopment around Uxbridge, mid-rise residential schemes at Hayes and West Drayton, and conversion projects all routinely raise rights of light questions. London Borough of Hillingdon planning consent does not address that legal position.
We act on Hillingdon schemes from the London head office, with reach across Uxbridge, Ruislip, Hayes, and West Drayton, supported by colleagues in Essex and Hampshire. CHP is RICS regulated and has been advising on rights of light since 2004. The London team handles this work with specialist focus, and we can pull in our rights of light assessments overview where it helps the wider design team understand the process.
The right time to instruct is early, before drawings go in for planning consent. On a Hillingdon project, that means commissioning the free initial assessment at the design stage, when changes to massing, height, or fenestration are still affordable. The appraisal identifies which neighbouring windows could be affected and which look likely to carry the 20-year easement under the Prescription Act 1832, and a full rights of light analysis follows using specialist software where the appraisal flags a real risk.
Where the modelling shows likely infringement, the cutback analysis tests design variations including reduced height, set-back upper floors, and adjusted fenestration until the scheme works for both the planning case and the rights of light position. The Equivalent First Zone and the 50/50 rule are applied to quantify any loss. Where the work overlaps with the Party Wall etc. Act 1996, we coordinate party wall services from the same team.
A good outcome means the Hillingdon scheme is viable, the impact on neighbouring windows has been quantified and addressed, and any infringement has been resolved on agreed terms before construction starts. For most local developments, that means a few design adjustments at the planning stage and a negotiated release of rights where any residual impact remains. Court action is rare when the rights of light position is identified and worked through early on the project.
Adjoining owners on Hillingdon streets affected by a nearby development can equally instruct us to assess the impact, advise on the strength of their legal position under the acquired easement, and consider Light Obstruction Notices where formal protection of acquired light is the right step. Where rooftop or upper-floor work is in play, we can also bring in airspace development advice from the same team.
