Double glazing quotes in Bristol
Compare free written quotes from local installers who cover your BS postcode, for sash repairs, secondary glazing, replacement windows and new sealed units. Many Bristol windows sit in a shared Georgian or Victorian front, so find out who controls yours before anyone measures up.
One Bristol household in eight lives in a flat in a converted house.
- Local installers who cover your postcode survey and quote in writing
- Sash, casement or slim-profile: choose timber, uPVC or aluminium, or "not sure"
- Free and no obligation. Say no to every quote if none suit you
We are a free quote-matching service, not an installer.
How it works
How Bristol double glazing quotes reach you
Seven questions online, a confirmation call, then written quotes.

Describe the job
Seven questions on property type, windows, frame material, timing, ownership, postcode and contact details.

A call to confirm
A short call checks the details, then local installers who cover your postcode get in touch.

Compare the quotes
Each installer surveys and quotes in writing. Have your freeholder's specification ready for the survey.
Then line them up with how to compare double glazing quotes.
Sashes, glass and repairs
What you can get quoted for in Bristol
Bristol installers quote for sash repair and draught-proofing, secondary glazing, replacement windows, new sealed units and repairs. 30.3% of Bristol properties were built before 1919, against 20.1% across England (VOA 2025), so more jobs here start with a timber sash than in most cities.
- Timber sash overhaul: new cords, beads and brush-pile draught-proofing on sound frames.
- Secondary glazing on the room side of original windows, which the council calls the preferred option where traditional timber windows survive.
- Replacement timber windows where the originals cannot be saved, or uPVC and aluminium on later homes outside the controlled streets.
- Sealed units and hardware repairs on newer double glazing, where a misted pane needs a new unit, not a new frame.
Doors: ask the installer whether they quote for them. On a shared frontage, agree any door change with the freeholder too.
Get Bristol sash and window quotesFree, no obligation
Local factors
What changes a Bristol double glazing quote
Six things change a Bristol quote: converted flats, conservation areas, Article 4 streets, listed status, old timber sashes and private renting. Each can add a consent step, so settle them before the survey.
| In Bristol | What it changes in your quote | Ask or check |
|---|---|---|
| 12.0% of households in converted or shared housesCensus 2021 | The freeholder usually controls the windows | The freeholder's written consent |
| 33 conservation areasBristol City Council | Flat windows there need planning permission | Your street on the Know Your Place map |
| Since 1974 Clifton Village Article 4 directionBristol City Council | Outside changes to the crescents need permission | Who prepares the planning application |
| 2,145 listed building entriesHistoric England list | Windows and secondary glazing need listed building consent | Matching material, proportion and glazing bars |
| 30.3% of properties built before 1919VOA | The council puts sash repair first | Repair and replacement on one quote |
| 26.2% of households rent privatelyCensus 2021 | Landlords must reach EPC band C on all tenancies by 1 October 2030 | The U-value of each window, in writing |
Converted flats
Window quotes for a converted Bristol flat
In a converted Bristol house, the freeholder usually controls the windows, because they form part of a shared frontage. 12.0% of Bristol households live in flats in converted or shared houses, nearly three times England's 4.3%. All flats together house 33.9% of households (Census 2021, TS044).
The Planning Portal says that "if you are a leaseholder, you may first need to get permission from your landlord or management company". Flats also lack householder permitted development rights, so a change of look can need planning permission too.
- Read your lease or title to see who owns and repairs the windows.
- Get the freeholder's written consent and any agreed window specification.
- Ask the other flats whether they plan to replace at the same time.
- Tell installers if it is a joint job: one look across the front, and often one scaffold.
Bristol City Council warns that in a house split into flats, double glazing one flat or one storey "can affect the appearance of the building as a whole" (Traditional Windows guidance, 2016). Our guide to replacing windows in a leasehold flat covers licences for alterations and who pays.
Get quotes for a converted flatFree, no obligation
Planning and consent
Do new windows need permission in Bristol?
New windows on a Bristol house usually need no planning permission when they look "similar" to the originals (Planning Portal). Permission or consent is needed in four cases: Article 4 streets, flats in conservation areas, listed buildings and new bays. Bristol City Council adds that "like-for-like repairs does not usually require permission".
Clifton's crescents, Henbury and Sherrin Way (Article 4)
Homes in Royal York Crescent, Cornwallis Crescent, Caledonia Place and West Mall need planning permission for any alteration that affects their external appearance. The Clifton Village Article 4 direction has applied since July 1974. Similar directions require permission "to make alterations and extensions to a dwellinghouse" in Henbury (1971) and on land at Sherrin Way (26 July 1982). Bristol's other Article 4 directions cover boundary walls, hard standings and changes of use to HMOs, not windows.
Flats in the 33 conservation areas
Bristol has 33 conservation areas, and the council says "changing the windows on a flat on any building in a conservation area will require planning permission". Check yours on the council's Know Your Place map, call 0117 922 3000 or email conservation@bristol.gov.uk.
Listed buildings
Bristol has 2,145 listed building entries on the Historic England list (53 grade I, 212 grade II*, 1,880 grade II). Replacing any window on a listed building needs listed building consent, and so does adding secondary glazing (Bristol City Council). Oxford, with 195 grade I entries, faces the same consent question: see Oxford window quotes.
- Choose an installer who prepares the planning or listed building application.
- Ask for windows that match the existing sashes in material, proportion and glazing bars.
- Ask how long the quote stays valid while the council decides.
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Repair or replace
Repair, refurbish or replace Bristol sash windows?
Repair a Bristol sash first, refurbish it second and replace it only when the frame cannot be saved. Bristol City Council says "repair and restoration of traditional timber windows should always be the first option", and that timber windows "can almost always be repaired, even when in quite poor condition". Only 26.18% of Bristol's pre-1929 homes with an EPC reach band C or above (ONS, table 2c).
- Repair when the sash sticks, rattles or has a broken cord. Professional draught-proofing cuts air leakage by 86%, a figure the council quotes from Paul Baker's research.
- Refurbish and add secondary glazing when the frame is sound but the room is cold or noisy. The council says secondary glazing works best for noise too, with a gap of at least 10mm between panes for higher acoustic performance.
- Replace when the timber is beyond repair. The council recommends a factory-made timber window for unlisted homes, says slim-profile double glazing "will be resisted" in listed buildings with Georgian sashes, and "may be acceptable" in later Victorian ones.
Ask each installer for the U-value and, for road-facing bedrooms, the sound reduction (Rw) figure of the glass. See sash window replacement for the full set of options.
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Before you sign
How to choose a double glazing company in Bristol
Choose a Bristol double glazing company on checks you can make yourself, because we do not vet or rank installers.
- Check the register. Search the firm on the FENSA installer search or the CERTASS register by name or postcode.
- Check Companies House. Confirm the company on the quote exists, when it started and whether a previous company with the same directors was wound up.
- Check the guarantee. Ask for an insurance-backed guarantee and the insurer's name. A company-only guarantee ends if the firm stops trading.
- Compare reviews on two platforms the firm does not control, and ask to see a Bristol sash or conversion job it has finished.
- Collect three written quotes for the same windows, using our questions to ask a double glazing salesman at each survey.
Bristol landlords face the same checks plus a deadline: private landlords must reach EPC band C on all tenancies by 1 October 2030, with "double glazing for windows" a named fabric measure (DESNZ, January 2026). 26.2% of Bristol households rent privately (Census 2021, TS054), and a landlord of a converted flat needs the freeholder's agreement first.
Areas this page covers
Bristol areas this page covers
This page is about homes in the city of Bristol and the South Gloucestershire and North Somerset towns around it. Enter the property postcode in the form, and your enquiry goes to local installers who cover that postcode; we cannot promise cover for every street.
| Part of Bristol | Places and postcode districts |
|---|---|
| Central and west | Clifton and Hotwells BS8, Redland and Cotham BS6, Westbury-on-Trym and Henleaze BS9 |
| North | Bishopston and Horfield BS7, Southmead and Henbury BS10, Avonmouth and Lawrence Weston BS11 |
| East | Easton and St George BS5, Kingswood BS15, Fishponds and Staple Hill BS16 |
| South | Bedminster and Southville BS3, Brislington and Knowle BS4, Hengrove BS14 |
| Around Bristol | Bradley Stoke and Patchway BS32, BS34, Yate BS37, Keynsham BS31, Portishead BS20 |
BS8 holds Clifton's Article 4 crescents and BS10 takes in Henbury, both covered above. Bristol Airport sits outside the city in North Somerset and publishes noise insulation grant guidelines (2022); most Bristol postcodes are well outside that area.
Nearby areas
FAQ
Double glazing quotes in Bristol, answered
Who will contact me after I ask for quotes?
A short call confirms the job first. Local installers who cover your postcode then contact you to book a survey and give a written quote.
Is there a government grant for double glazed windows?
Glazing is an eligible measure under the Warm Homes: Local Grant, and Bristol City Council also runs the Bright Green Homes scheme and energy loans. Check the council's energy grants page for current eligibility.
Do I need planning permission for windows in Bristol?
Bristol houses usually need no planning permission for windows of similar appearance. Clifton Village's crescents, Henbury, Sherrin Way, listed buildings and flats in conservation areas are the exceptions, and leaseholders need their freeholder's consent first.
Can I put uPVC sash windows in a Bristol conservation area?
uPVC sash windows on a house in a Bristol conservation area are permitted development only when they look similar to the originals and the street has no Article 4 direction. Ask the council conservation team before you order.
Which double glazing company in the UK is considered the best?
No double glazing company is officially ranked best in the UK, and we do not rank installers. For a Bristol home, the right company is on the FENSA or CERTASS register, has done timber or heritage work and puts your exact windows in a written quote.
When is the best time to get double glazing quotes?
Get quotes as soon as you start planning, because a Bristol job can need freeholder consent or planning permission first. Our guide to the best time of year to buy double glazing covers the seasons.
Is it worth replacing 20 year old double glazing?
Replacing 20 year old double glazing is worth it when the frames have failed or several sealed units have misted. Bristol City Council notes that plastic windows "tend to require wholesale replacement within 20 years", while the Energy Saving Trust puts well-fitted double glazing at 20 to 35 years, so check the frames as well as the glass.
What are the disadvantages of double glazing?
Double glazing's disadvantages are sealed units that mist as they age, airtight rooms that need trickle vents kept open, and limits on listed buildings and conservation areas (Energy Saving Trust). On a Bristol Georgian sash, the council prefers repair and secondary glazing to replacement.
How much should I expect to pay for double glazing?
This site covers getting and comparing quotes. For prices, see what double glazing costs in Bristol on our sister site.
Get free double glazing quotes in Bristol
Sort consent first, then compare written quotes from local installers who cover your postcode. Start with double glazing quotes, or read our guide to double glazing installers. Across the Severn? See double glazing quotes in Cardiff.
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Sources
Figures checked 1 October 2026.
- Census 2021 TS044 Accommodation type and TS054 Tenure, ONS via Nomis: TS044, TS054
- Valuation Office Agency, Council Tax stock of properties 2025, table CTSOP4.1
- ONS, EPC band C or above, England and Wales, tables 2b and 2c
- Bristol City Council, conservation areas, Article 4 directions and Traditional windows: guidance and repairs
- Bristol City Council, grants and loans for home energy efficiency
- Bristol City Council, Traditional Windows: guidance on their repair, upgrading and replacement (November 2016)
- Bristol Airport, noise insulation grant scheme guidelines (2022)
- FENSA, fensa.org.uk; CERTASS, certass.co.uk; Companies House, company search
- Energy Saving Trust, energy efficient windows and doors (updated 20 May 2026)
- Postcode districts: postcodes.io outcode lookup (ONS Postcode Directory), checked 2026-10-01
- planning.data.gov.uk, listed building dataset (Historic England list entries)
- Planning Portal, doors and windows: planning permission and change the windows of a flat
- DESNZ, Improving the energy performance of privately rented homes: government response (2026)