When you need a Party Wall notice for a UK extension or loft in 2026, notice periods, surveyor costs, and how the award process actually works. This guide is written by PG Property Repairs and Renovations, an FMB and TrustMark accredited building company based in Worthing, using real costs and timescales from projects completed across Worthing, Lancing, Shoreham, Brighton and the wider West Sussex area.