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Portsmouth and Southsea, PO1 to PO6

Double glazing quotes in Portsmouth

Compare free quotes for double glazing: Portsmouth installers who cover your PO postcode quote for replacement windows, misted sealed units and repairs. On some Southsea streets a new front window needs planning permission, so check yours before anyone measures.

40.0% of Portsmouth homes were built before 1919, twice the England share (VOA, 2026)

We are a free quote-matching service, not an installer.

Step 1 of 7Your property
What type of property is it?

This sets a typical window count. You can change it next.

How many windows need replacing?

Count each opening once. A bay counts as one.

10

windows

Which frame material?

Not sure? uPVC is what most UK homes fit.

When would you like them fitted?

This helps installers plan your survey visit.

Do you own the property?

Installers can only fit windows with the owner's agreement.

What's the property postcode?

We match you with installers who cover it.

Where should we send your quotes?

You will get a quick call to confirm the details, then local installers who cover your postcode get in touch.

First line only, for example 12 Mill Lane. We already have your postcode.

Thanks , your enquiry is on its way

Here is exactly what happens now, so nothing arrives unannounced.

  1. You get a call to confirm your requirements. This is usually the first call you get, so keep your phone handy.
  2. Local installers who cover your postcode then phone you to arrange quotes.
  3. You compare and decide. There is no obligation to accept any quote. Our quote comparison guide shows how to check them line by line.

Changed your mind? Email hello@doubleglazingquote.uk to withdraw. The privacy policy has the detail.

Free No obligation
  • Victorian terraces, flats or semis, bays and sashes included
  • Repairs or full replacement on one enquiry
  • Free to ask, with no contract until you choose a quote

How it works

How to get double glazing quotes in Portsmouth

Send one enquiry, then line up written quotes for the same windows.

  1. Homeowner sending a window quote enquiry on a laptop

    Describe the windows

    House or flat, number of windows, frame and timing. Say if your street is in a Southsea conservation area.

  2. Man on a short confirmation phone call at home

    Confirm on a short call

    We check the details, then installers who cover your PO postcode get in touch.

  3. Installer fitting a white uPVC window into a brick opening

    Compare written quotes

    Each installer surveys and prices the job. Compare the energy rating, the guarantee and any repair option.

Our guide on how to compare double glazing quotes lists what a complete quote should show.

What installers quote for

What can you get quoted for in Portsmouth?

Portsmouth installers quote for replacement windows, sealed units, repairs and secondary glazing, from one misted pane in Cosham to every window of a Southsea terrace.

  • Replacement windows in uPVC, aluminium or timber, including sash-style and bay windows.
  • Sealed-unit replacement for misted glass in frames that are still sound.
  • Repairs to hinges, handles, locks and seals.
  • Secondary glazing where a front window has to stay as it is.

Not every window firm fits doors, so ask each installer whether a front or back door can join the same quote.

Get Portsmouth window quotesFree, no obligation

Local factors

What changes a Portsmouth double glazing quote

Five things change a Portsmouth quote: Article 4 controls in Southsea, the age of the house, terraced fronts, flats and renting. Tell installers which apply when you book the survey, so each quote covers the same work.

In PortsmouthWhat it changes in your quoteAsk or check
Article 4 directions in Owen's Southsea and Castle RoadPortsmouth City CouncilA new-look front window needs planning permissionYour street, then like-for-like options
40.0% of homes built before 1919VOA, 2026Sash and bay openings need careful surveysSash-style and casement prices side by side
43.4% of households in terraced housesCensus 2021Bays and narrow fronts change the window countEach bay priced as its own line
35.5% of households in flatsCensus 2021No householder permitted development, and the freeholder decidesWritten consent before the survey
28.6% of households rent privatelyCensus 2021Lets must meet EPC band E, with band C the 2030 aimThe energy rating of each window, in writing

Article 4 streets

Do you need planning permission for new windows in Southsea?

New front windows need planning permission on Southsea houses covered by the council's Article 4 directions in the Owen's Southsea and Castle Road conservation areas. For its other conservation areas, Portsmouth City Council says "Many changes to doors, windows, roofs, chimneys and boundary walls remain permitted development". It adds: "In some cases special controls called Article 4 Directions have been introduced."

Owen's Southsea

Most of the Owen's Southsea directions list "The replacement of windows and doors on front elevations (Class A of Part 1 of Schedule 2 of the Order)" as work that needs permission. The council's page for the conservation area names the streets each direction covers, so check yours there before you ask for quotes.

Castle Road and the streets around it

A 1998 direction in the Castle Road conservation area set out to "control the inappropriate replacement of windows, doors, and roof coverings on the front elevation of each property". It names houses in Castle Road, Great Southsea Street, Kent Road, Regent Place, St Edward's Road, Garden Lane and Southsea Terrace. Further directions on the same council page cover houses in St Edward's Road, Yarborough Road, Worsley Road, Pelham Road, The Retreat and Wilberforce Road.

Matching windows are treated differently from new designs. In a 1998 letter about a Kent Road house, the council said windows that match the existing ones would not need an application, while windows that differ in appearance and opening method would.

  • Check your house on the council's conservation area page and map.
  • Ask each installer for a like-for-like option that matches the existing pattern and opening.
  • Ask whether the installer prepares drawings when a planning application is needed.

The council's report on Castle Road adds that "Businesses and flats cannot be included in the Direction." A flat has no householder permitted development rights in the first place, as the flats section below explains.

Get quotes for a Southsea Article 4 homeFree, no obligation

Older homes

Replacement windows for Portsmouth's Victorian terraces

Portsmouth's window market is mostly older terraces: 40.0% of homes were built before 1919 and 27.1% before 1900, against 20.0% before 1919 across England (VOA, 31 March 2026). 43.4% of households live in a terraced house, against 23.0% in England (Census 2021, TS044).

Many of these houses started life with timber sashes, often in a bay. Earlier replacements are common, so the survey decides what the opening can take.

  • Ask for a sash-style quote and a casement quote for the same windows, so you can compare looks and prices.
  • Ask whether the bay is replaced as one unit and how the reveals and sills will be made good.
  • Ask for the Window Energy Rating or U-value of every window on the quote.

Our page on sash window replacement compares timber and uPVC sashes for period fronts.

Get terrace window quotesFree, no obligation

Repair or replace

Is it worth replacing 20 year old double glazing in Portsmouth?

Replacing 20-year-old double glazing is worth it when the frames have failed; when only the glass or fittings have, a repair costs less. A misted pane means the sealed unit has lost its seal, and a new unit fits the existing frame.

  • Repair a stiff hinge, a loose handle, a worn lock or one misted unit.
  • Add secondary glazing behind a front window that an Article 4 direction protects.
  • Replace frames that are warped, rotten or no longer lock.

Ask for a repair price and a replacement price on the same visit. On a pre-1919 house, a full replacement is also the moment to improve the energy rating of every window.

Get Portsmouth repair quotesFree, no obligation

Flats and lets

Flats and lets: consent and EPC before your Portsmouth quote

Portsmouth flats usually need the freeholder's written consent, and a change of appearance can need planning permission, because householder permitted development rights apply to houses, not flats (GPDO 2015, Schedule 2, Part 1). 35.5% of Portsmouth households live in flats and 7.7% in flats converted from houses or other buildings, against 22.2% and 4.3% across England (Census 2021, TS044).

Read the lease for who owns the windows and any rules on colour or style, then get written consent before the survey. Our guide to replacing windows in a leasehold flat covers who pays and who signs.

Landlords have a deadline as well as a lease. 28.6% of Portsmouth households rent privately, against 20.5% in England (Census 2021, TS054). Private lets must reach at least EPC band E, and the government's aim is band C by 2030 (GOV.UK, minimum energy efficiency standard).

  • Ask for the Window Energy Rating or U-value of each window, so the next EPC can record it.
  • Ask for one quote that covers several lets, priced per property.
  • Ask whether the installer works with managing agents on access and drawings.

Get quotes for a flat or letFree, no obligation

Before you choose

How to compare Portsmouth double glazing installers

Compare Portsmouth installers on registration, company record, guarantee and written detail before you compare the totals. Our page on double glazing installers explains what each check proves.

  1. Look the firm up on the FENSA or CERTASS register.
  2. Check the company name and age on Companies House.
  3. Ask whether the guarantee is insurance-backed, and get it in writing.
  4. Check that the quote lists every window, its energy rating and any making good.

Run through our contract checklist before you commit. 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. The double glazing cooling off period guide sets out the rules.

Areas

Portsmouth areas this page covers

This page is about homes in the Portsmouth City Council area, from Portsea Island to the mainland wards. These are the places it describes, not a coverage promise: enter your postcode in the form and the confirmation call tells you whether a local installer covers it.

  • PO1 St Thomas, Charles Dickens, Fratton and Nelson
  • PO2 Nelson, Copnor, Hilsea and Fratton
  • PO3 Baffins, Milton, Copnor and Hilsea
  • PO4 Central Southsea, Eastney and Craneswater, Milton and Baffins
  • PO5 Central Southsea, St Jude and St Thomas
  • PO6 Cosham, Drayton and Farlington, and Paulsgrove

Gosport, Fareham and Havant have their own councils. For those towns, see double glazing in Hampshire.

Nearby areas

Double glazing in Southampton

The other Solent city with its own council, where flats and lets shape most quotes.

See Southampton quotes

Double glazing in Fareham

Across Portsmouth Harbour, with Titchfield's own Article 4 rules.

See Fareham quotes

Questions to ask a double glazing salesman

What to ask about like-for-like windows and drawings on the survey.

Read the guide

Double glazing deposit

How much to pay upfront on a whole-terrace job, and how to protect it.

Read the guide

FAQ

Portsmouth double glazing questions

What happens after I ask for double glazing quotes in Portsmouth?

A short call confirms the job first. Installers who cover your PO postcode then arrange a survey and send a written quote.

Is there a grant for double glazing in Portsmouth?

Portsmouth is on the July 2026 Warm Homes: Local Grant list, and glazing is an eligible measure for qualifying homes. The council's energy support page explains who can apply.

Is Portsmouth covered by the Hampshire page?

No. Portsmouth City Council is a unitary council with its own planning, so this page covers Portsmouth and the Hampshire page covers the county's district councils.

Can I replace windows in a Southsea flat?

Replacing windows in a Southsea flat usually needs the freeholder's consent, and a different look can need planning permission, because flats have no householder permitted development rights.

Is it worth replacing 20 year old double glazing?

Twenty-year-old double glazing is worth replacing when the frames have failed and worth repairing when only a sealed unit or fitting has, so ask for both prices on one visit.

What are the disadvantages of double glazing?

The main drawbacks are the upfront outlay, sealed units that mist once their seal fails, and planning limits on front windows in Southsea's Article 4 streets.

How much should I expect to pay for double glazing?

The price depends on the number of windows, the frame material, the glass and any planning work, and our sister site shows what double glazing costs in each UK region.

Compare Portsmouth quotes window by window

Check your street first, then compare written quotes for the same windows and glass. Start with compare double glazing quotes.

Get free Portsmouth quotes
Window fitter fixing a new frame into a brick opening

Sources

Figures and council pages checked 8 October 2026.

  • Portsmouth City Council, about conservation areas: portsmouth.gov.uk
  • Portsmouth City Council, conservation areas and maps: portsmouth.gov.uk
  • Portsmouth City Council, Owen's Southsea conservation area and Article 4(2) directions: portsmouth.gov.uk
  • Portsmouth City Council, Castle Road Article 4(2) direction: portsmouth.gov.uk
  • Portsmouth City Council, energy support (Warm Homes: Local Grant), checked 1 October 2026: portsmouth.gov.uk
  • VOA, Council Tax: stock of properties 2026, table CTSOP4.1 (31 March 2026): gov.uk
  • Census 2021, TS044 accommodation type and TS054 tenure (Nomis): TS044, TS054
  • GOV.UK, domestic private rented property minimum energy efficiency standard, landlord guidance: gov.uk
  • The Town and Country Planning (General Permitted Development) (England) Order 2015, Schedule 2, Part 1: legislation.gov.uk
  • DESNZ, Warm Homes: Local Grant policy guidance (eligible measures): gov.uk
  • FENSA: fensa.org.uk; CERTASS: certass.co.uk; Companies House: gov.uk
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