Free Insulation & Energy Grants in Southampton
Last updated:
Southampton has over 107,000 households (ONS Census 2021) and is the largest city on England's south coast. The council runs Southampton Healthy Homes in partnership with The Environment Centre (tEC), providing free one-to-one energy advice and help accessing grants. Southampton City Council actively participates in ECO4 Flex and the Great British Insulation Scheme.
Southampton is the largest city on England's south coast with a population of 252,000. Despite its southern location, fuel poverty is a significant issue in inner-city wards. The city has a strong maritime heritage and a large student population from two universities. Southampton City Council declared a climate emergency and links ECO4 Flex applications to its Healthy Homes project to ensure residents receive holistic support.
Southampton's housing stock reflects its maritime and industrial heritage — Victorian and Edwardian terraces in Shirley, Freemantle, and Northam, alongside post-war reconstruction in the city centre (much was rebuilt after WWII bombing). Large council estates in Thornhill, Weston, and Millbrook add significant social housing stock. Many older terraces have solid brick or stone walls and poor insulation, while 1960s tower blocks in the city centre present their own energy efficiency challenges.
Similar government-funded energy grants are available in nearby areas including Bristol, London and Cardiff. Each council sets its own eligibility criteria, so it's worth checking the specific rules for your area.
Available grants in Southampton
Warm Homes Local Grant
Up to £30,000Council-administered grant providing up to £15,000 for insulation and £15,000 for heating upgrades. Availability depends on your local council.
Boiler Upgrade Scheme
Up to £7,500Get up to £7,500 towards an air source or ground source heat pump, £2,500 for an air-to-air heat pump, or £5,000 for a biomass boiler. Available to homeowners replacing fossil fuel or electric heating.
ECO4 Insulation Grants
Varies by propertyFree cavity wall, loft, and solid wall insulation for qualifying households. Available if you receive benefits or have a low income.
Compare all UK energy grants side by side on our grant comparison page.
Could you get these grants in Southampton?
Free 2-minute eligibility check — no obligation, no personal details needed
Check Your EligibilitySouthampton City Council runs Southampton Healthy Homes in partnership with The Environment Centre (tEC), a local charity. Advisors provide free one-to-one support including accessing grants for insulation and heating, investigating high energy bills, reducing energy costs, fuel debt advice, and damp and condensation guidance. My Home Made Better also offers free 30-minute consultations endorsed by all Hampshire, Southampton, and Portsmouth councils.
Who qualifies in Southampton?
You may qualify for free energy efficiency improvements if you:
- Receive benefits such as Universal Credit, Pension Credit, or Income Support
- Have a household income of £36,000 or less (Warm Homes Local Grant) or £31,000 (ECO4 LA Flex — varies by council)
- Live in a property with a poor EPC rating (D, E, F, or G)
- Are a homeowner, private tenant, or social housing tenant (tenants need landlord/housing provider consent)
Southampton City Council — ECO4 LA Flex Eligibility
Under ECO4 Local Authority Flexibility, Southampton City Council can refer households that don't receive qualifying benefits but meet local criteria:
- Live in a fuel-poor area (Index of Multiple Deprivation LSOA deciles 1-3)
- Have a health condition made worse by cold housing (cardiovascular, respiratory, immunosuppressed, limited mobility, mental health, older people 65+, young children, pregnant women)
- Have been identified by a GP, NHS Trust, or NHS Foundation Trust as vulnerable to cold
- Receive Council Tax Reduction on grounds of low income
- Have a child eligible for free school meals due to low income
- Supported by the Southampton Healthy Homes project
- Referred by energy supplier or Citizens Advice as struggling to pay energy bills
Source: Southampton City Council ECO4 Statement of Intent · Last checked 2026-02-17
Areas we cover in Southampton
Free insulation and energy grants are available to eligible residents across Southampton, including:
Shirley
Bitterne
Woolston
Freemantle
Northam
Thornhill
Weston
Millbrook
Portswood
Bassett
Sholing
Swaythling
Grants for tenants in Southampton
Southampton tenants can access free energy grants. Private renters may qualify for ECO4 insulation grants or the Warm Homes Local Grant — your landlord must consent. Social housing tenants in areas like Thornhill, Weston, and Millbrook should contact their housing provider. Southampton Healthy Homes (via The Environment Centre) provides free advice to all tenant types — call 0800 804 8601.
What happens after you're approved in Southampton?
A qualified assessor visits your home (1–2 hours) to check your walls, loft, windows, and heating system.
Within 1–2 weeks, you receive a report detailing which improvements qualify for funding and your estimated energy savings.
Approved installers carry out the work free of charge. Cavity wall insulation typically takes 2–4 hours, loft insulation is usually done within a day, external wall insulation takes 1–2 weeks for a semi-detached house, and internal wall insulation takes 3–5 working days.
After installation, your property gets a new EPC certificate showing the improved energy rating.
Frequently asked questions — Southampton
What energy grants are available in Southampton?
Southampton residents can access the Warm Homes Local Grant (up to £30,000), Boiler Upgrade Scheme (£7,500 for heat pumps), and ECO4 insulation grants (extended to 31 December 2026). Southampton Healthy Homes also helps residents access additional funding.
What is Southampton Healthy Homes?
Southampton Healthy Homes is a council-backed project delivered by The Environment Centre (tEC), a local charity. They provide free one-to-one support including help accessing grants for insulation and heating, investigating high energy bills, fuel debt advice, and damp and condensation guidance. Call 0800 804 8601 or email [email protected].
Can Southampton's Victorian terraces get insulation grants?
Yes, the Victorian and Edwardian terraces in Shirley, Freemantle, and Northam are strong candidates for solid wall insulation grants. Many have solid brick walls with no cavity. Grants of up to £15,000 are available through ECO4 or the Warm Homes Local Grant.
What is My Home Made Better?
My Home Made Better is a free, impartial advice service endorsed by all councils across Hampshire, Southampton, and Portsmouth. Every homeowner can claim a free 30-minute telephone consultation about making their home more energy efficient, including information about available grants and savings.
Can Southampton tenants get free insulation?
Yes, private and social housing tenants in Southampton can qualify for free insulation through ECO4 or the Warm Homes Local Grant. Private tenants need landlord consent. Social housing tenants in areas like Thornhill and Millbrook should contact their housing provider.
How do I apply for ECO4 in Southampton?
Contact Southampton Healthy Homes on 0800 804 8601 for free guidance, or choose a TrustMark-registered installer who will submit an application on your behalf. The council links all ECO4 Flex applications to Healthy Homes to ensure residents get comprehensive support.
What areas of Southampton have the most fuel poverty?
Areas including Northam, Thornhill, Weston, Millbrook, Shirley, and Bitterne tend to have higher fuel poverty rates due to older housing stock and lower incomes. However, grants are available across all SO postcodes — eligibility depends on income, benefits, and property type.
Is the ECO4 scheme available in Southampton?
Yes, ECO4 is fully available across Southampton and Hampshire. It provides free cavity wall, loft, and solid wall insulation for eligible households. The scheme has been extended to 31 December 2026 — apply while funding is available.
Further reading
Energy grants in nearby areas
Check what grants are available in other locations near Southampton.
Check your eligibility in Southampton
Find out in 2 minutes which grants you qualify for — completely free, no obligation.
Check Your EligibilityFor official council information, visit Southampton City Council .
Not Eligible for a Grant?
Solar panels could still save you £700-1,100 per year on electricity. Check what you could save in Southampton with our free calculator.
Calculate Your Solar Savings →