Party Walls and Neighbourly Matters: A Guide for Commercial Developers and Investors
Colliers argues that party wall and neighbourly issues are a core part of development risk, especially on urban or constrained sites, yet are often ignored until they cause problems.
Party walls are walls shared by two or more properties. The Party Wall etc. Act 1996 requires neighbours to be notified of certain works, such as work on or near a shared wall, excavation close to neighbouring foundations, or changes affecting a boundary wall. It sets out a process for notice, response and, if needed, formal resolution through a Party Wall Award. Neighbourly matters cover a wider range of issues, including crane and scaffold oversailing, access licences, rights of light, boundaries, noise and vibration, and monitoring agreements.
Colliers highlights several reasons to deal with these early:
• Programme protection, as disputes can lead to stop notices, legal challenges or injunctions that halt work
• Cost certainty, by avoiding unplanned fees and claims and identifying mitigation such as underpinning while it is cheapest
• Investor confidence, as forward funders and joint venture partners want to see risk under control
• Maintaining relationships with adjoining occupiers, councils and utility providers on mixed-use or phased schemes
• Legal compliance, since incorrectly served notices can expose works to challenge and affect insurance and warranties
The firm recommends appointing a specialist ideally at RIBA Stage 2 or 3, to map boundary constraints, serve valid notices on time, handle neighbour negotiations, coordinate with the project team on temporary works and logistics, and advise on crane and scaffold strategies. Though often a small line in the cost plan, these matters can become expensive if mishandled, whereas early involvement usually means fewer disputes and better cost control.
