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
8storm overflows within 2 km
809hours of spills in 2025 between them (typical neighbourhood: about 36)
131spill events counted
Yorkshire Water
Mitchell Laithes Wwtwinto River Calder42 spills, 414 hours in 2025
1.8 km away
Yorkshire Water
Thornhill Dewsbury No1 Csointo River Calder36 spills, 173 hours in 2025
1.9 km away
Yorkshire Water
Mitchell Laithes Wwtwinto River Calder19 spills, 110 hours in 2025
1.8 km away
Yorkshire Water
Thornhill Syphon Csointo River Calder16 spills, 67 hours in 2025
1.9 km away
Yorkshire Water
Thornhill Road Csointo Smithy Brook3 spills, 34 hours in 2025
1.6 km away
Yorkshire Water
Combs Hill No 2 Csointo Trib Of Calder & Hebble Nav.14 spills, 11 hours in 2025
750 m away
Yorkshire Water
Thornhill Park Avenue Csointo River Calder1 spills, 1 hours in 2025
1.5 km away
Yorkshire Water
Fiddlers Hillinto Trib Of River Calder0 spills, 0 hours in 2025
34 planned, approved or being built and 2 running (6 MW between them). Those within 5 km are on the map above.
Solar farm
Dewsbury Sewage, Clough Lane - Solar PanelsApproved, not yet built · 1 MW
May 2026 1.9 km away
Solar farm
Lady Ings Farm, Middlestown - Solar Photovoltaic FarmApproved, not yet built · 50 MW
Nov 2022 2.2 km away
Solar farm
Low Farm, Flockton - Solar Photovoltaic FarmApproved, not yet built · 50 MW
Aug 2022 2.3 km away
Battery storage
Low Farm, Flockton - Battery StorageApproved, not yet built
Aug 2022 2.3 km away
Rooftop solar
Calder Textiles, Dewsbury Mills - Solar Photovoltaic EquipmentApproved, not yet built
Aug 2023 2.4 km away
Solar farm
New Hall Farm, New Hall Lane - Solar FarmApproved, not yet built · 22 MW
Jun 2025 2.5 km away
Solar farm
H M Prison & Young Offender Institution - Solar Photovoltaic PanelsApproved, not yet built · 210 kW
Dec 2021 2.8 km away
Rooftop solar
Sainsburys, Railway Street - Solar PanelsApproved, not yet built · 370 kW
Apr 2026 3.2 km away
Rooftop solar
Ossett Health Village, Kingsway - Solar PV PanelsApproved, not yet built · 200 kW
Nov 2023 3.4 km away
Battery storage
Station Road - Energy Storage FacilityApproved, not yet built
Mar 2022 4.1 km away
Road and street works within 1 km
4 permitted works running now or planned.
Standard
Albion Road, DewsburyDisconnection or alteration of supply · NORTHERN POWERGRID (YORKSHIRE) PLC · Some carriageway incursion
Oct 2026 to Nov 2026 250 m away
Standard
Combs Road, DewsburyNew service connection · NORTHERN POWERGRID (YORKSHIRE) PLC · Some carriageway incursion
Dec 2026 to Dec 2026 550 m away
Standard
Mountain Crescent, DewsburyNew service connection · NORTHERN POWERGRID (YORKSHIRE) PLC · No carriageway incursion
Nov 2026 to Nov 2026 650 m away
Minor
Edge View, DewsburyUtility repair and maintenance works · YORKSHIRE WATER · No carriageway incursion
Oct 2026 to Oct 2026 200 m away
DfT Street Manager permits (OGL), England. Dates are the planned ones; works often finish early or overrun.
Major infrastructure projects within 30 km
Pre-application
Ferrybridge Carbon Capture and StorageOther Pipe-lines · The Ferrybridge Energy from Waste Carbon Capture and Storage project is located near Knottingley within the City of Wakefield in West Yorkshire and administrative area of the Wakefield Metropolitan DC. The site is located to the west of the River Aire and the east of the A1(M).
Ferrybridge Next Generation Power StationGenerating Stations · Land at and within the vicinity of the former Ferrybridge C Power Station Site, Kirkhaw Lane, Ferrybridge, Knottingley, West Yorkshire – within the administrative area of Metropolitan District of Wakefield, and a land corridor extending eastwards into the administrative area of North Yorkshire Council.
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 Thornhill: +47% over five years (2020 → 2025).
Council tax list: 10 homes added in the neighbourhood since April 2024.
Population (GP registrations): +0.7% in two years.