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
No monitored sewer storm overflows within 2 km (England only).
18 planned, approved or being built and 3 running (3 MW between them). Those within 5 km are on the map above.
Rooftop solar
Tesco Stores Limited, Lower High Street - Solar PanelsApproved, not yet built · 390 kW
Jan 2025 1.3 km away
Rooftop solar
David Lloyd Leisure Club, Hartspring Lane - Solar PanelsApproved, not yet built · 280 kW
Sept 2025 3.2 km away
Rooftop solar
C P House, Otterspool Way - Solar PanelsApproved, not yet built · 280 kW
Dec 2022 3.4 km away
Rooftop solar
Rickmansworth School, Croxley Green - Solar PanelsApproved, not yet built · 180 kW
Feb 2023 3.4 km away
Rooftop solar
Royal Masonic School, Rickmansworth Park - Solar PanelsPlanning application in · 150 kW
Apr 2026 4.7 km away
Rooftop solar
Northwood College, Maxwell Road - Solar PanelsApproved, not yet built
Jul 2023 4.7 km away
Battery storage
Hilfield Lane, Aldenham - Battery Energy StorageApproved, not yet built · 170 MW
Jan 2026 4.7 km away
Rooftop solar
Kingsway North Orbital Road - Solar ArrayApproved, not yet built · 180 kW
Mar 2022 4.8 km away
Rooftop solar
Northwood Health And Racquet Club, Ducks Hill Road - Solar Pv PanelsPlanning application in · 330 kW
Jul 2023 4.9 km away
Rooftop solar
Langleybury Film HubPlanning application in · 3 MW
Oct 2022 5.2 km away
Road and street works within 1 km
8 permitted works running now or planned, 3 of them major.
Major
Queens Avenue, WatfordHighway improvement works · HERTFORDSHIRE COUNTY COUNCIL · Road closure
Nov 2026 to Dec 2026 300 m away
Major
Queens Avenue, WatfordHighway improvement works · HERTFORDSHIRE COUNTY COUNCIL · Road closure
Nov 2026 to Nov 2026 450 m away
Major, planned
Cambridge Road, WatfordHighway repair and maintenance works · HERTFORDSHIRE COUNTY COUNCIL · Road closure
Jan 2027 to Jan 2027 800 m away
Standard
Willow Lane, WatfordDiversionary works · UK POWER NETWORKS EASTERN & LONDON · Multi-way signals
Oct 2026 to Nov 2026 250 m away
Standard
Belgrave Avenue, WatfordUtility repair and maintenance works · AFFINITY WATER - C · Some carriageway incursion
Oct 2026 to Oct 2026 350 m away
Minor
Addiscombe Road, WatfordUtility asset works · AFFINITY WATER - C · Two-way signals
Oct 2026 to Oct 2026 550 m away
Minor
Mildred Avenue, WatfordUtility repair and maintenance works · AFFINITY WATER - C · Some carriageway incursion
Oct 2026 to Oct 2026 600 m away
Minor
Market Street, WatfordUtility repair and maintenance works · AFFINITY WATER - C · Some carriageway incursion
Oct 2026 to Oct 2026 650 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
SDC M40 CampusGenerating Stations · The site of the project is located in Buckinghamshire, England. It is approximately 2km to the west of Gerrards Cross, approximately 2.5km east of Beaconsfield and approximately 1.5km north of Hedgerley. The site comprises land immediately to the south of the A40 Oxford Road and immediately to the north of the M40 motorway. It has a history of landfill activities and is currently operated by Veolia for the landfilling of inert building waste (albeit the site no longer accepts any forms of waste).
application due January 2027 14.7 km away
Pre-application
Heathrow WestAirports · Heathrow Airport and land to the north-west and west of Heathrow Airport
New-home postcodes with fewer than 5 homes are counted above but not listed. 26 postcodes nearby had new homes completed in the last two years.
Rooftop solar
The Tropical Marine Centre, Solesbridge Lane - Solar PV PanelsApproved, not yet built · 240 kW
Nov 2023 6.1 km away
Rooftop solar
Headstone Lane - Solar PanelsApproved, not yet built · 590 kW
Oct 2024 6.6 km away
Running nearest: Mount Vernon Hospital - Solar Panels (rooftop solar, 4.7 km); Woodside Leisure Centre - Solar PV Panels (rooftop solar, 5.1 km); Elstree Film And TV Studios, Shenley Road - Solar Panels (rooftop solar, 9.5 km).
DESNZ Renewable Energy Planning Database, April to June 2026 (OGL). Projects of 150 kW and over; refused, withdrawn and abandoned ones are left out.
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.