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Double glazing in Slough

£2,167 to £11,762 installed, and 39% of homes in the council area rated EPC D to G.

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By Home Energy Quotes · Updated September 2026 · Slough, Berkshire

Double Glazing in Slough

What double glazing costs in Slough

4–6 windows

£2,167–£4,076

Saves up to £67 a year. Pays back in about 47 years.

Full house (most common)

£4,673–£7,228

Saves up to £117 a year. Pays back in about 51 years.

Large home package

£7,924–£11,762

Saves up to £164 a year. Pays back in about 60 years.

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

Slough in numbers

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

39% of homes with an EPC in the Slough council area are rated D to G, and the median energy score is 71, which is band C. At the 2021 Census, 72.4% of households in the Slough council area used mains gas as their only central heating, 0.1% oil only and 15.2% electricity only.

Slough council areaFigureSource
Homes with an EPC rated D to G39%ONS, EPCs lodged to March 2025
Median EPC energy score71 (band C)ONS, EPCs lodged to March 2025
Households on mains gas heating only72.4%Census 2021, ONS
Electricity network operatorSSEN Distribution (Southern England)NESO licence area boundaries

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

Grants and funding in Slough

No general glazing grant

There is no general grant for double glazing in Slough, 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

Slough has £1,500,000 of Warm Homes: Local Grant funding allocated in principle for April 2025 to March 2028. Income and EPC rules apply.

Source: DESNZ, list updated July 2026

Is Slough a good place for double glazing?

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

Slough has a population of 166,855, and the area falls within the South East region. We recommend getting at least 3 quotes to compare prices.

Find Installers in Slough

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 Slough

  • Qualifications — check the installer holds relevant qualifications and certifications for double glazing before signing any contract
  • Local references — ask for completed jobs in Slough or Berkshire
  • 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 Slough

Questions about double glazing in Slough

How much does double glazing cost in Slough?
Double Glazing in Slough costs between £2,167 and £11,762 installed, depending on system size. A typical mid-range system costs around £6,194 including installation and VAT (modelled estimate).
How energy efficient are homes in Slough?
39% of homes with an EPC in the Slough council area, which covers Slough, are rated D to G, and the median energy score is 71, which is band C.
Is there a grant for double glazing in Slough?
There is no general grant for double glazing in Slough, 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 Slough?
The estimated payback period in Slough is typically around 60 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 Slough?
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 Slough before installation.
How do I find a good installer in Slough?
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 Slough

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

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Slough on the map

Map of Slough, Berkshire
Slough, Berkshire 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.