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).
29 planned, approved or being built and 13 running (76 MW between them). Those within 5 km are on the map above.
Battery storage
Ipswich Road, Cardiff - Battery StorageApproved, not yet built · 93 MW
Apr 2024 800 m away
Rooftop solar
David Lloyd Leisure Club, Ipswich Road - Solar ArrayApproved, not yet built · 370 kW
Feb 2024 800 m away
Battery storage
Llanedeyrn Drive - Micro Energy Storage ProjectApproved, not yet built · 200 kW
May 2026 1.6 km away
Solar farm
The Maltings East, Tyndall Street - Solar PanelsApproved, not yet built · 600 kW
Nov 2023 1.6 km away
Rooftop solar
Portmanmoor Road Industrial Estate, Portmanmoor Road - Solar PanelsApproved, not yet built · 360 kW
Jun 2023 1.9 km away
Rooftop solar
Ocean Park Arena, Splott - Solar ArraysApproved, not yet built · 410 kW
Jan 2026 2.0 km away
Rooftop solar
Cardiff University - Solar PanelsApproved, not yet built · 190 kW
Aug 2024 2.1 km away
Battery storage
Rover Way, Splott - Energy Park & Data CentreApproved, not yet built · 1,000 MW
Apr 2025 2.1 km away
Rooftop solar
University Hospital of Wales - Roof Mounted Solar ArrayApproved, not yet built · 340 kW
Jun 2022 2.8 km away
Rooftop solar
Tramshed, Pendyris Street - Solar Panels & Battery StoragePlanning application in
Nov 2022 3.1 km away
Road and street works within 1 km
No road or street works with a permit running now or planned within 1 km (England; permits granted up to the end of September 2026).
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
Future Energy Llanwern Solar ProjectGenerating Stations · Land to the south of Llanwern Steelworks (approx. 2.5km) comprising the Gwent Levels between Whitson
Hinkley Point C Connection Project Material ChangeElectric Lines · The Project proposes permanent access infrastructure for the purpose of maintenance access and operation at locations between Bridgwater and Seabank, in the administrative boundaries of Bristol City, North Somerset, Somerset and South Gloucestershire Councils.
application due January 2028 27.6 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 Pen-y-lan South: +18% over five years (2020 → 2025).
Council tax list: 60 homes added in the neighbourhood since April 2024.