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Double glazing in Southampton

£2,340 to £11,950 installed, and 47% of homes in the council area rated EPC D to G.

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By Home Energy Quotes · Updated September 2026 · Southampton, Hampshire

Double Glazing in Southampton

What double glazing costs in Southampton

4–6 windows

£2,340–£4,040

Saves up to £69 a year. Pays back in about 46 years.

Full house (most common)

£4,690–£7,180

Saves up to £114 a year. Pays back in about 52 years.

Large home package

£8,110–£11,950

Saves up to £180 a year. Pays back in about 56 years.

Source: Home Energy Quotes Cost Index, costs modelled March 2026, savings at the October to December 2026 price cap. Prices are estimates and include installation and VAT. Actual costs may vary.

Southampton in numbers

Published statistics for the Southampton council area, not our estimates.

47% of homes with an EPC in the Southampton council area are rated D to G, and the median energy score is 69, which is band C. At the 2021 Census, 66.2% of households in the Southampton council area used mains gas as their only central heating, 0.1% oil only and 21% electricity only.

Southampton council areaFigureSource
Homes with an EPC rated D to G47%ONS, EPCs lodged to March 2025
Median EPC energy score69 (band C)ONS, EPCs lodged to March 2025
Households on mains gas heating only66.2%Census 2021, ONS
Electricity network operatorSSEN Distribution (Southern England)NESO licence area boundaries

These are published official statistics for the Southampton council area, which covers Southampton, not Home Energy Quotes estimates. Sources checked 6 October 2026.

Grants and funding in Southampton

No general glazing grant

There is no general grant for double glazing in Southampton, and windows do not qualify for 0% VAT. Councils delivering the Warm Homes: Local Grant can include double glazing in upgrades for eligible lower-income homes with an EPC rating of D to G.

Source: GOV.UK — Warm Homes: Local Grant

Standard VAT

Double glazing is not on HMRC's list of energy-saving materials, so 20% VAT applies and is inside the prices above.

Source: HMRC — VAT Notice 708/6

Warm Homes: Local Grant

The council is part of a Warm Homes: Local Grant consortium led by Portsmouth, allocated £34,807,254 in principle across the consortium for April 2025 to March 2028. Income and EPC rules apply.

Source: DESNZ, list updated July 2026

Is Southampton a good place for double glazing?

The area’s housing stock includes a range of properties suited to double glazing installations throughout Southampton. Combined with South East’s energy prices, double glazing installations here may offer good value (individual results will vary).

Southampton has a population of 253,000, and the area falls within the South East region. We recommend getting at least 3 quotes to compare prices.

Southampton

Find Installers in Southampton

We recommend getting at least 3 quotes from qualified installers before making a decision. Check reviews, ask for local references, and make sure warranties are clearly stated in writing.

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What to check before hiring an installer in Southampton

  • Qualifications — check the installer holds relevant qualifications and certifications for double glazing before signing any contract
  • Local references — ask for completed jobs in Southampton or Hampshire
  • Reviews — check online reviews before committing
  • Warranty — product and workmanship warranties should be clearly stated in writing
  • 3 quotes minimum — we recommend comparing at least three quotes to ensure you get a fair price
Double Glazing installer in Southampton

Questions about double glazing in Southampton

How much does double glazing cost in Southampton?
Double Glazing in Southampton costs between £2,340 and £11,950 installed, depending on system size. A typical mid-range system costs around £6,370 including installation and VAT (modelled estimate).
How energy efficient are homes in Southampton?
47% of homes with an EPC in the Southampton council area, which covers Southampton, are rated D to G, and the median energy score is 69, which is band C.
Is there a grant for double glazing in Southampton?
There is no general grant for double glazing in Southampton, and windows do not qualify for 0% VAT. Councils delivering the Warm Homes: Local Grant can include double glazing in upgrades for eligible lower-income homes with an EPC rating of D to G.
How long is the payback period in Southampton?
The estimated payback period in Southampton is typically around 61 years, based on estimated savings of up to £104 a year for a typical home. Actual payback depends on your number of windows, property size and current glazing type.
Do I need planning permission in Southampton?
Most double glazing installations fall under permitted development rights and do not require planning permission. However, listed buildings, conservation areas and flats may need approval. Always check with your local planning authority in Southampton before installation.
How do I find a good installer in Southampton?
We recommend getting at least 3 quotes from qualified installers. Check online reviews and verify that the installer holds relevant qualifications before signing any contract.

Get quotes for your home in Southampton

Up to three approved installers who cover Southampton may contact you. Free, no obligation.

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Southampton on the map

Map of Southampton, Hampshire
Southampton, Hampshire and the surrounding area.

Double Glazing in nearby towns

Last reviewed: . Costs are modelled estimates from the Home Energy Quotes Cost Index — see how we calculate them. Grant rates are checked against GOV.UK.