Double glazing quotes in Bexley
Get free double glazing quotes in Bexley and Bexleyheath from local installers who cover your DA or SE postcode, for replacement windows on 1930s semis, bay windows, sealed units and repairs. Bexley's design guide of June 2026 expects new windows on a house to match the original design.
44.2% of Bexley households live in a semi-detached house, the highest share in London (Census 2021)
- Free, with no obligation to accept any quote
- Bays priced line by line, with the original pane pattern
- DA and SE postcodes, from Erith to Sidcup
How it works
How Bexley quote requests work
Tell us about the job
Property type, how many windows, frame material and when you want them fitted. It takes about a minute.
We confirm the details
A quick call checks what you need, then your enquiry goes to local installers who cover your postcode.
Compare like for like
Each installer surveys and quotes in writing. Check every quote against our quote comparison checklist before you sign anything.
What you can get quoted for
What you can get quoted for in Bexley
Bexley installers quote for whole-house window replacement, bay windows, glass-only units and repairs from one enquiry:
- Replacement windows in uPVC, aluminium or timber for semis, terraces and bungalows;
- Bay windows rebuilt to the original shape, such as the 6-pane round bays of the Stevens Estate in Welling;
- Timber windows for the Article 4 houses in Old Bexley, Old Forge Way and Red House Lane;
- Sealed-unit replacement for misted panes;
- Repairs to hinges, handles, locks and seals.
Ask the installer whether a door can go on the same quote.
Get Bexley window quotesFree, no obligation
Local factors
What changes a Bexley double glazing quote
Six things change a Bexley quote: the 2026 design guide, flats, the Article 4 houses, 1930s semis, bay windows and energy ratings. Match each one to your house before the survey.
| In Bexley | What it changes in your quote | Ask or check |
|---|---|---|
| June 2026 design guideBexley Council | New windows on a house should match the original design | Glazing bars and top lights copied from the old windows |
| Flats need permission when appearance changesBexley Council | A planning application before ordering | Who prepares the drawings |
| 4 Article 4 directions on named housesBexley Council | Permission for window changes on those houses | Your address against the council list |
| 40.8% of properties built 1919 to 1939VOA 2026 | Inter-war frames, bays and leaded top lights | Each bay priced as its own line |
| 6-pane round bays on the Stevens EstateBexley Council | A curved bay with a set pane pattern | The same six panes on the new bay |
| 44.7% of homes at EPC band CONS | Most homes below band C, so ratings matter | The BFRC energy rating on each window |
Planning
Do you need planning permission for new windows in Bexley?
A Bexley house rarely needs planning permission for new windows, but a flat does when the look changes, and so do the named houses under Article 4 directions. Bexley's Design Guide SPD Part 2, adopted on 29 June 2026, says: "For single dwellinghouses, replacing windows is likely to be permitted development, however, in all instances, the Council expects these to be sympathetic to the original window and door design."
The same guide adds that "Planning permission will be required for replacing windows and doors within flats and listed buildings where replacements materially affect the external appearance of the building." Bexley has over 150 listed buildings and structures and 23 conservation areas. Four conservation areas carry Article 4 directions that reach windows on named houses:
| Conservation area | Houses covered | Window wording |
|---|---|---|
| Old Bexley | Named numbers on North Cray Road, and 99 and 107 to 115 Bexley High Street | "alterations to windows" or works "affecting windows" |
| Old Forge Way, Sidcup | Every property in the conservation area | "affecting windows" |
| Red House Lane, Bexleyheath | 1 to 9 (odd) Red House Lane and 44 Upton Road | "affecting windows" on the front, or front and side |
| Brook Street, Erith | 153 to 247 (odd), 255, 257 and 259 to 283 (odd) Brook Street | Alterations to a house fronting Brook Street |
Secondary glazing needs no application in most homes. The guide says it "is typically considered permitted development", with permission only "in listed buildings and where PD rights are removed." The national rules for listed buildings and new bays are in planning permission for windows.
Get quotes for an Article 4 houseFree, no obligation
Semis and bays
Window quotes for Bexley's 1930s semis and Stevens Estate bays
A Bexley quote is usually for an inter-war semi with a bay. 40.8% of Bexley's 101,950 rated properties were built between 1919 and 1939, the 3rd highest share in London and almost double London's 22.0% (VOA, 31 March 2026). 44.2% of households live in a semi-detached house, against 18.6% across London.
Bexley's design guide names one bay by its pattern: the Stevens Estate in Welling is "characterised by 6-pane round bay windows to the front elevation". It also says matching the original design "is especially important where the building is part of a terrace which share common window detailing features."
- Ask for each bay priced as its own line, with any structural support named.
- Ask for the same number of panes, glazing bars and top lights as the old bay.
- On a terrace or a matching pair of semis, show installers the neighbours' windows.
Get bay window quotes in BexleyFree, no obligation
Energy ratings
Compare Bexley quotes on the BFRC window energy rating
Compare Bexley quotes on each window's BFRC energy rating, because the council's own guide asks for it: "performance should be assessed on the window's energy rating provided by the British Fenestration Rating Council".
Bexley homes need the upgrade more than most. Only 44.7% of Bexley homes with an EPC reach band C, the 3rd lowest share in London, and just 16.9% of those built before 1929 (ONS, to March 2025). Ask every installer to write the rating, or the whole-window U-value, against each window on the quote.
Get Bexley quotes with energy ratingsFree, no obligation
Repair or replace?
Repair or replace? Bexleyheath and Sidcup windows
Repair a Bexley window when the frame is sound and replace it when the frame has failed. Repair searches are common here: "double glazing repairs Sidcup" and "double glazing repairs Bexleyheath" are regular searches, and a repair category page ranks for double glazing in Bexley (8 October 2026).
| Your window | Route | Ask the installer |
|---|---|---|
| Misted glass, sound frame | New sealed unit | The guarantee on the unit |
| Draughty or stiff 1970s or 1980s frame | Seals and hinges first | A repair price and a replacement price |
| Warped or rotten bay frame | Full bay replacement | Structural support, written into the quote |
Our page on window replacement London covers glass-only and full-frame work across the capital.
Get Bexley repair or replacement quotesFree, no obligation
Before you sign
How to check a Bexley window company
Check a Bexley window company on FENSA or CERTASS and Companies House before anyone surveys, and ignore grant offers at the door. Bexley's Warm Homes page warns: "We are aware that Warm Homes: Local Grant is being used in scams at the moment."
- Find the firm on fensa.org.uk or certass.co.uk.
- Confirm on Companies House that the company named on the quote is active.
- Ask for the insurance-backed guarantee in writing, with the insurer named.
If you sign at home, you usually have at least 14 days to cancel, but made-to-measure windows can be an exception, so check the contract before you sign. Read the double glazing cooling off period guide for the detail, and how to choose a double glazing installer for the full list of checks.
Areas
Bexleyheath, Sidcup and Welling: areas this page covers
This page is about the London Borough of Bexley, from Erith and Belvedere on the Thames to Sidcup in the south. Many DA addresses still read "Kent", but Bexley Council sets the window rules here; Dartford and Swanley are in Kent proper. Your enquiry reaches installers who cover the postcode you enter, so cover varies by street. We are a free quote-matching service, not an installer.
| Postcode district | Places |
|---|---|
| DA5 (part) | Bexley village, Blendon |
| DA6 and DA7 | Bexleyheath, Barnehurst, Crook Log |
| DA8 | Erith, Northumberland Heath, Slade Green |
| DA14 and DA15 (part) | Sidcup, Blackfen, Lamorbey |
| DA16 (part) | Welling, East Wickham |
| DA17 and DA18 | Belvedere, Thamesmead East |
| DA1, SE2 and SE28 (part) | Crayford, Abbey Wood, Thamesmead |
Nearby areas
FAQ
Double glazing in Bexley: questions answered
Is there a government grant for double glazed windows?
Bexley's Warm Homes: Local Grant covers "wall, loft and floor insulation", "low carbon heating" and "solar panels", not windows. The council also warns that the grant's name is being used in scams.
Who is the best double glazing company in the UK?
No double glazing company is officially the best in the UK, and we do not rank installers. Compare written quotes for the same windows, and check each firm's registration, company record and guarantee.
Do I need planning permission for secondary glazing in Bexley?
No, in most homes. Bexley's 2026 design guide says secondary glazing "is typically considered permitted development", with planning permission needed only in listed buildings and where permitted development rights are removed.
Is Bexleyheath in London or Kent?
Bexleyheath is in the London Borough of Bexley, although many postal addresses still say Kent. Bexley Council handles its planning, including the window rules on this page.
Which Bexley streets have Article 4 directions on windows?
Three directions name window changes: houses in Old Bexley on North Cray Road and Bexley High Street, every property in Old Forge Way in Sidcup, and 1 to 9 Red House Lane with 44 Upton Road. A Brook Street direction in Erith covers alterations to houses fronting the street.
Is it worth replacing 20 year old double glazing?
Replacing 20 year old double glazing pays off when the frames or bays have failed. A Bexley window with misted glass in a sound frame needs only a new sealed unit.
How much should I expect to pay for double glazing?
The cost turns on window count, frame material and how many bays you have. Put itemised quotes side by side, and see what double glazing costs in London on our sister site.
Compare Bexley quotes, bay by bay
Tell us the house type, the number of windows and bays, and the frame you want. Local installers who cover your DA or SE postcode survey and quote in writing. For rules that cover every borough, see double glazing quotes in London.
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Sources
Figures checked 8 October 2026.
- Bexley Council, Design Guide SPD Part 2: Building Alterations and Extensions (June 2026), adopted 29 June 2026 per the council's supplementary planning documents page
- Bexley Council, Article 4 directions, including Old Bexley, Old Forge Way, Red House Lane and Brook Street
- Bexley Council, conservation and heritage
- Bexley Council, Warm Homes: Local Grant
- Valuation Office Agency, Council Tax stock of properties 2026, table CTSOP4.1 (31 March 2026)
- ONS, Census 2021 tables TS044 accommodation type and TS054 tenure
- ONS, EPC band C or above, England and Wales, tables 2a and 2c, to March 2025
- FENSA, fensa.org.uk; CERTASS, certass.co.uk; Companies House, company search
- Postcode districts: postcodes.io outcode lookup (ONS Postcode Directory), checked 8 October 2026