Spotted when a home's energy certificate shows at least 15 m² (and 15%) more floor area than an earlier one. Only homes with two certificates show up, so the real number is higher. A busy street suggests extensions get permission here; check the council's planning register for the details.
Storm overflows within 2 km
1storm overflows within 2 km
206hours of spills in 2025 between them (typical neighbourhood: about 36)
19spill events counted
Thames Water
Merstham Wwtwinto Redhill Brook19 spills, 206 hours in 2025
Silvertown TunnelHighways · The new road tunnel will pass under the River Thames between Silvertown and North Greenwich
decided May 2018 28.6 km away
Planning Inspectorate list of nationally significant infrastructure projects (roads, railways, energy, water, waste), October 2026 (OGL). Each is placed at one point, usually the middle of the site; long schemes run well beyond it.
Transport schemes within 20 km
None on our list yet. We're starting with recently opened and under-construction rail schemes.
The longer view
Like-for-like prices in Merstham: +13% over five years (2020 → 2025).
Council tax list: 30 homes added in the neighbourhood since April 2024.
Population (GP registrations): +1.2% in two years.