Double glazing in Derry

Q: How much does double glazing cost in Derry?

Double Glazing in Derry typically costs between £1,850 and £10,850 installed, depending on system size (modelled estimate). A typical mid-range system costs around £5,340. Actual costs vary depending on property and installer.

Q: How long is the payback period in Derry?

The estimated payback period in Derry is typically around 51 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.

Q: How do I find a good installer in Derry?

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.

£1,850 to £10,850 installed, and the grants that apply in Derry and official data for the council area.

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By Home Energy Quotes · Updated September 2026 · Derry, County Londonderry

What double glazing costs in Derry

4–6 windows

£1,850–£3,290

Saves up to £65 a year. Pays back in about 40 years.

Full house (most common)

£3,900–£6,450

Saves up to £116 a year. Pays back in about 45 years.

Large home package

£6,710–£10,850

Saves up to £166 a year. Pays back in about 53 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.

Derry in numbers

Published statistics for the Derry City and Strabane council area, not our estimates.

The median EPC energy score for homes in the Derry City and Strabane council area is 65, which is band D. At the 2021 Census, 23.7% of households in the Derry City and Strabane council area used mains gas as their only central heating, 54.4% oil only and 1.3% electricity only.

Derry City and Strabane council area	Figure	Source
Median EPC energy score	65 (band D)	Department for Communities, EPCs to March 2023
Households on mains gas heating only	23.7%	Census 2021, NISRA
Electricity network operator	NIE Networks (Northern Ireland)	NIE Networks

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

Grants and funding in Derry

Affordable Warmth Scheme

Households in Derry with a gross income under £23,000 may qualify for the Affordable Warmth Scheme, which can replace single-glazed windows. Otherwise there is no general grant for double glazing, and windows do not qualify for 0% VAT.

Source: NI Housing Executive — Affordable Warmth

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

Is Derry a good place for double glazing?

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

Derry has a population of 83,000, and the area falls within the Northern Ireland region. We recommend getting at least 3 quotes to compare prices.

Find Installers in Derry

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.

Request a free quote →

What to check before hiring an installer in Derry

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

Questions about double glazing in Derry

How much does double glazing cost in Derry?

Double Glazing in Derry costs between £1,850 and £10,850 installed, depending on system size. A typical mid-range system costs around £5,340 including installation and VAT (modelled estimate).

How energy efficient are homes in Derry?

The median EPC energy score for homes in the Derry City and Strabane council area, which covers Derry, is 65, which is band D.

Is there a grant for double glazing in Derry?

How long is the payback period in Derry?

The estimated payback period in Derry is typically around 51 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 Derry?

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 Derry before installation.

How do I find a good installer in Derry?

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 Derry

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

Request a free quote

Derry on the map

Derry, County Londonderry and the surrounding area.

Double Glazing in nearby towns

Last reviewed: 15 September 2026. Costs are modelled estimates from the Home Energy Quotes Cost Index — see how we calculate them. Grant rates are checked against GOV.UK.