Double glazing quotes in Hounslow
Compare free double glazing quotes in Hounslow from local installers who cover your TW or W4 postcode, for replacement windows, secondary glazing, acoustic glass, sealed units and repairs. Homes close to Heathrow check the airport's insulation scheme first, because it pays for like-for-like windows in eligible homes.
2025 to 2028: phase one of Heathrow's Residential Insulation Scheme
- Free and no obligation. Check Heathrow, then compare
- Acoustic glass and secondary glazing on one enquiry
- Timber sashes for Bedford Park and Gunnersbury streets
How it works
How Hounslow double glazing quotes reach you
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 Hounslow
Hounslow installers price noise, heritage and everyday window jobs from the same form:
- Acoustic laminated glass in new windows, for homes under the flight path;
- Secondary glazing fitted inside the windows you keep;
- Timber double hung sashes for the Chiswick conservation streets;
- Replacement windows in uPVC, aluminium or timber for houses with no controls;
- Sealed units and repairs for misted glass, hinges and locks.
Ask the installer whether a door can go on the same quote.
Get Hounslow window quotesFree, no obligation
Local factors
What changes a Hounslow double glazing quote
Six things change a Hounslow quote: the Heathrow scheme, two Article 4 areas, 29 conservation areas, flats, renting and inter-war bays. Settle the first three before installers survey.
| In Hounslow | What it changes in your quote | Ask or check |
|---|---|---|
| 2025 to 2028 for phase one of Heathrow's schemeHeathrow | Like-for-like windows may be funded | Heathrow's postcode checker, before you pay |
| 2 Article 4 areas: Bedford Park and Gunnersbury ParkHounslow Council | Permission when a window differs from the original | Timber sashes that match the joinery |
| 29 conservation areasHounslow Council | Permission for a window of different appearance | Your street on the council's map |
| 45.8% of households in flats or conversionsCensus 2021 | Planning permission for any external change | Freeholder consent before the survey |
| 30.9% of households rent privatelyCensus 2021 | EPC band C on every tenancy by 1 October 2030 | The rating of each window in writing |
| 28.5% of properties built 1919 to 1939VOA 2025 | Bays and top lights on the front | Each bay priced on its own line |
Heathrow
Is your Hounslow home in Heathrow's noise insulation scheme?
Heathrow's postcode checker answers it: "Registration is now open to all eligible properties", and "Phase one will commence from 2025 to 2028". The Residential Insulation Scheme aims to reach "around 20,000 of the most affected homes", and a Heathrow surveyor visits to "survey your home and create a report".
| What Heathrow says | What it means for your quote |
|---|---|
| "All works will be funded by Heathrow on a like for like basis." | An upgrade beyond the surveyed specification can cost you the difference |
| Conservatories are "specifically excluded", with outbuildings and garages | A conservatory roof or windows stay a private job |
| "While Listed buildings can be eligible, the cost of any planning permissions required remains with the homeowner." | Listed homes budget for the consent work |
| The eligibility boundary changes "at least every five years" | A home outside it today can be inside later |
Not eligible, or waiting for your phase? Ask installers to price the like-for-like windows and any acoustic upgrade on separate lines, and to state the laminated glass in writing. That keeps your options open if Heathrow's survey comes later.
Get Hounslow acoustic glazing quotesFree, no obligation
Secondary glazing
Secondary glazing or new windows in Hounslow?
Secondary glazing suits Hounslow homes whose original windows must stay, and new windows suit the rest. Heathrow's scheme funds either route. Hounslow Council's sustainability guidance names "Many less invasive measures, such as draught-proofing, secondary glazing and underfloor insulation" for conservation areas and listed buildings.
- Listed homes: separate listed building consent is needed for alterations, so secondary glazing is usually the first price to ask for.
- Conservation area fronts: secondary glazing leaves the street elevation unchanged.
- Other houses and flats with consent: ask for new acoustic windows and secondary glazing on the same visit, and compare both.
Get Hounslow secondary glazing quotesFree, no obligation
Chiswick conservation streets
Do you need planning permission for new windows in Bedford Park or Gunnersbury Park?
You need planning permission in Bedford Park and Gunnersbury Park only when the new window differs from the old one in size, material, design or form. Hounslow's Article 4(2) leaflet states: "In the case of double hung sash windows, where this is like-for-like, but double glazed, Planning Permission is unlikely to be required."
The council confirmed the directions on 24 July 2001. They apply where development "fronts onto a highway or open space", and cover "any new window or alteration to a window opening". New dormer windows in the roof slope also need permission. "All properties shown in the Bedford Park and Gunnersbury Park schedules are affected":
| Area | Streets in the schedule |
|---|---|
| Bedford Park (Chiswick) | Abinger Road, Addison Grove, Bath Road (43), Blenheim Road, Fairfax Road, Flanders Road, Gainsborough Road, Lonsdale Road, Priory Avenue, Roman Road, Woodstock Road |
| Gunnersbury Park | Gunnersbury Avenue, Gunnersbury Lane, Manor Gardens, Park Drive, Princes Avenue, The Ridgeway |
- Find your house number on the schedule.
- Ask for timber double hung sashes that copy the existing glazing bars, horns and mouldings.
- Ask whether the quote includes drawings for an application if any detail changes.
Bedford Park crosses into Ealing, where the council publishes its own direction; see double glazing quotes in Ealing for that side.
Get Bedford Park sash quotesFree, no obligation
Conservation areas and flats
Window quotes in Hounslow's other conservation areas and flats
A Hounslow house in any of the borough's 29 conservation areas needs planning permission for "Replacing windows or doors with those of a different appearance", and a flat needs it for any external change. The 29 include Strand on the Green, Old Chiswick, Turnham Green, Isleworth Riverside, Spring Grove, Osterley Park, Heston Village, Cranford Village and Feltham Green and Town Centre.
Hounslow's conservation guidance adds that "PDR do not apply to flats, or houses that have been converted to flats", so "any external changes to these buildings would require planning permission". That matters here: 45.8% of Hounslow households live in a flat, maisonette or converted building (Census 2021).
- Check the lease to see who owns the window frames.
- Get the freeholder's written consent and the block's window style.
- Ask each installer whether the quote includes the planning application.
Our guide to replacing windows in a leasehold flat covers licences and who pays, and the planning permission for windows checker covers the general rules.
Get quotes for a Hounslow flatFree, no obligation
Repair or replace?
Repair or replace your Hounslow windows?
Repair a Hounslow window when the frame is sound, and replace it when the frame has failed or you want a noise upgrade. Hounslow's housing spans every era: 16.4% of properties were built before 1919 and 20.3% since 2000 (VOA 2025).
| Your window | Route | Ask the installer |
|---|---|---|
| Misted pane, sound frame | New sealed unit, laminated if noise matters | Whether the new unit can be acoustic |
| Original sash on a scheduled street | Repair, or a like-for-like double glazed copy | A repair price beside a replica price |
| Window inside Heathrow's boundary | Wait for the survey, unless it has failed | A quote you can hold until the phase starts |
| Rotten or warped frame, no controls | Full replacement | The window's U-value in writing |
Our page on window replacement in London compares repair and replacement in more depth.
Get Hounslow repair or replacement quotesFree, no obligation
Before you sign
How to check a Hounslow double glazing company
Check a Hounslow installer on a register and on Companies House before the survey, and treat anyone selling at the door as a reason to stop. London Trading Standards warns that "there are more rogue traders offering insulation, double glazing, solar panels and heat pumps".
- Search the firm on the FENSA or CERTASS register.
- Check that the company on the quote is active on Companies House.
- For acoustic glass, ask for the glass build-up and its sound reduction figure on the written quote.
- Get the insurance-backed guarantee named in writing.
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. Our double glazing cooling off period guide explains how it works, and how to compare double glazing quotes lists what to line up.
Areas
Areas this page covers in Hounslow
This page is about the London Borough of Hounslow, from Chiswick and Brentford by the Thames to Feltham and Bedfont in the west. Enter your postcode in the form to see whether a local installer covers it. We are a free quote-matching service, not an installer.
| Postcode district | Places |
|---|---|
| TW3 | Hounslow, Hounslow Central, Hounslow East |
| TW4 | Hounslow West, Cranford |
| TW5 | Heston, Cranford |
| TW7 | Isleworth, Osterley, Spring Grove |
| TW8 | Brentford |
| TW13 and TW14 | Feltham, Hanworth, Bedfont |
| W4 | Chiswick, Bedford Park, Gunnersbury |
Nearby areas
FAQ
Double glazing in Hounslow: questions answered
Does Heathrow pay for new windows in Hounslow?
Heathrow pays for like-for-like windows or secondary glazing in homes inside its insulation scheme boundary, after a survey; its postcode checker shows whether your home is eligible.
Do I need planning permission for double glazed sash windows in Bedford Park?
A like-for-like double hung sash that is double glazed is "unlikely" to need planning permission in Bedford Park, according to Hounslow Council; a change in size, material, design or form does need it.
Will Heathrow's scheme cover a conservatory?
No. Heathrow excludes conservatories from the Residential Insulation Scheme, along with outbuildings and garages.
Is it worth replacing 20 year old double glazing?
Replacing 20 year old double glazing in Hounslow is worth it when the frame has failed or you need acoustic glass; in Heathrow's boundary, wait for the survey before paying for like-for-like windows.
What are the disadvantages of double glazing?
Double glazing's disadvantages in Hounslow are sealed units that mist when their seals fail, standard units that do not copy Chiswick sashes, and planning permission when a new window looks different in a conservation area.
How much should double glazing cost in the UK?
The cost depends on the window count, the glass and any acoustic upgrade, so compare itemised quotes and read what acoustic double glazing costs on our sister site.
Check the Heathrow postcode, then compare Hounslow quotes
Tell us the property, the number of windows and whether noise or a conservation street matters. Installers who cover your TW or W4 postcode arrange a survey and send written prices. For other boroughs, see double glazing quotes in London.
Get free quotes
Sources
Figures checked 8 October 2026.
- Heathrow, Quieter Neighbourhood Support FAQ and postcode checker
- Heathrow, Noise Action Plan 2024 to 2028, supporting annexes
- Hounslow Council, Article 4(2) directions for Bedford Park and Gunnersbury Park, with the Bedford Park and Gunnersbury Park schedules
- Hounslow Council, Article 4 directions
- Hounslow Council, conservation areas, appraisals and living in a conservation area
- Hounslow Council, improving the sustainability of historic homes
- Valuation Office Agency, Council Tax stock of properties 2025, table CTSOP4.1
- ONS, Census 2021 tables TS044 accommodation type and TS054 tenure
- DESNZ, Improving the energy performance of privately rented homes: government response (21 January 2026)
- London Trading Standards, doorstep crime campaign (18 May 2022)
- FENSA, fensa.org.uk; CERTASS, certass.co.uk; Companies House, company search