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
7hours of spills in 2025 between them (typical neighbourhood: about 36)
17spill events counted
Southern Water
Sirdar Road Southampton Csointo River Itchen17 spills, 7 hours in 2025
44 planned, approved or being built and 11 running (72 MW between them). Those within 5 km are on the map above.
Rooftop solar
Grosvenor House & Belmont House, Portswood Road - Solar PanelsApproved, not yet built · 160 kW
Apr 2025 1.9 km away
Rooftop solar
Southampton General Hospital, Tremona Road - Solar PanelsApproved, not yet built · 250 kW
Feb 2024 2.0 km away
Rooftop solar
Spire Hospital, Chalybeate Close - Solar PanelsApproved, not yet built · 230 kW
May 2024 2.2 km away
Rooftop solar
Airways Distribution Park, Wide Lane - Solar PanelsApproved, not yet built · 340 kW
Jun 2023 2.9 km away
Rooftop solar
Airways Distribution Park, Wide Lane, Unit 1 - Solar PanelsApproved, not yet built · 450 kW
Jan 2025 2.9 km away
Rooftop solar
Chandlers Ford - Solar panelsApproved, not yet built · 200 kW
Jun 2022 3.0 km away
Rooftop solar
Pei Genesis UK Limited, George Curl Way - Solar PanelsApproved, not yet built · 270 kW
Jan 2023 3.1 km away
Rooftop solar
Saxon House, Lower York Street - Solar Photovoltaic PanelsApproved, not yet built
May 2021 3.6 km away
Solar farm
Itchen Power, West End - Solar PanelsApproved, not yet built · 200 kW
Jan 2022 4.0 km away
Rooftop solar
Asquith Nursery, David Lloyd Leisure - Solar PanelsApproved, not yet built · 300 kW
Jan 20244.1 km away
Road and street works within 1 km
14 permitted works running now or planned, 9 of them major.
Major, planned
Bassett Crescent West, SouthamptonUtility repair and maintenance works · SOUTHERN GAS NETWORKS PLC · Give and take
Sept 2026 to Dec 2026 250 m away
Major
Bassett Crescent West, SouthamptonUtility repair and maintenance works · SOUTHERN GAS NETWORKS PLC · Give and take
Sept 2026 to Dec 2026 250 m away
Major
Glen Eyre Road, SouthamptonHighway improvement works · SOUTHAMPTON CITY COUNCIL · Road closure
Sept 2026 to Oct 2026 400 m away
Major
Bassett Crescent West, SouthamptonUtility repair and maintenance works · SOUTHERN GAS NETWORKS PLC · Give and take
Sept 2026 to Nov 2026 450 m away
Major
Bassett Gardens, SouthamptonUtility repair and maintenance works · SOUTHERN GAS NETWORKS PLC · Give and take
Oct 2026 to Oct 2026 450 m away
Major, planned
Butterfield Road, SouthamptonHighway improvement works · SOUTHAMPTON CITY COUNCIL · Road closure
Oct 2026 to Dec 2026 500 m away
Major
Winchester Road, SouthamptonHighway improvement works · SOUTHAMPTON CITY COUNCIL · Road closure
Oct 2026 to Dec 2026 600 m away
Major
Redhill, SouthamptonHighway repair and maintenance works · SOUTHAMPTON CITY COUNCIL · Road closure
Oct 2026 to Oct 2026 650 m away
Major, planned
Bassett Crescent West, SouthamptonHighway improvement works · SOUTHAMPTON CITY COUNCIL · Road closure
Oct 2026 to Dec 2026700 m away
Major infrastructure projects within 30 km
Decided
M3 Junction 9 ImprovementHighways · Adjacent to Winnal industrial estate, Winchester, north of Alresford Road B3404
decided May 2024 16.6 km away
Pre-examination
Hampshire Water Transfer and Water Recycling ProjectDams and Reservoirs · The project is located in Hampshire, South East England, extending from Havant on the south coast, to Otterbourne near Winchester. The proposed Water Recycling Plant would be located off Harts Farm Way in Havant.
application due in May 2026 19.6 km away
Decision
AQUIND InterconnectorElectric Lines · From the UK seaward limit in the English Channel to Lovedean Substation.
application due Q4 2019 25.8 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 Hollybrook: +17% over five years (2020 → 2025).
Council tax list: 0 homes added in the neighbourhood since April 2024.
Population (GP registrations): -1.0% in two years.
Harbour Parade - Solar PhotovoltaicsApproved, not yet built
Jul 2025 4.1 km away
Rooftop solar
West Quay Retail Park, Harbour Parade - Solar PanelsApproved, not yet built
Dec 2025 4.1 km away
Running nearest: Grove Solar Park (Phase 1) (solar farm, 5.7 km); Grove Solar Park (Phase 2) (solar farm, 5.7 km); Marchwood ERF (energy from waste, 5.9 km); Tavells Lane Solar Farm (solar farm, 6.3 km); Testwood Water Supply Works (solar farm, 6.5 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.
Standard
Bassett Crescent East, SouthamptonUtility asset works · SCOTTISH AND SOUTHERN POWER DISTRIBUTION (SSEPD) · Two-way signals
Dec 2026 to Dec 2026 250 m away
Standard
Glenwood Avenue, SouthamptonUtility repair and maintenance works · SOUTHERN WATER · No carriageway incursion
Oct 2026 to Oct 2026 650 m away
Minor
Bassett Avenue, SouthamptonHighway improvement works · NWP STREET LTD (formerly New World Payphones Ltd) · Lane closure
Jan 2027 to Jan 2027 100 m away
DfT Street Manager permits (OGL), England. Dates are the planned ones; works often finish early or overrun.