Replacement windows · by type of home
Replacement windows for a 3-bed semi
Replacement windows for a 3-bed semi are the job most price guides are written around, which makes it the easiest to compare quotes against. Most semis have between eight and ten windows, which a two-person team can usually replace in two or three days.
Are replacement windows for a 3-bed semi right for your home?
Suits
- 1930s and later semi-detached houses
- Owners replacing every window in one order to get the best price per window
- Anyone comparing quotes who needs a standard job to measure them against
Good points
- The best-documented home type, so quotes are easy to compare
- A whole-house order usually brings the price per window down
- Two fitters can usually do the job in two or three days
Watch out for
- A bay or a large picture window pushes the price up quickly
- Upstairs windows on the side and rear may need scaffolding
- A few quotes will price a different number of windows, so check what each includes
What replacement windows for a 3-bed semi cost
Replacement windows for a 3-bed semi typically cost £5,000 (3-bed semi, nine uPVC casement windows, fitted), with most jobs between £4,000 and £6,000. That includes VAT at 20%. Fitting takes 1–3 days on site.
What you would actually pay
Typical 3-bed semi, nine uPVC casement windows, fitted · UK- Typical installed cost Replacement windows for a 3-bed semi, supplied and fitted
- £4,167
- VAT at 20% Standard rate
- £833
- Net cost to you
- £5,000
If you borrowed £5,000.00 over 36 months at 0.0%, it would cost £138.89 a month – £5,000.00 in total, of which £0.00 is interest. The last payment would be £138.85.
Illustration only – not a quote, not an offer of credit, and not financial advice. Rates depend on your circumstances and creditworthiness.
Where the money goes on replacement windows for a 3-bed semi
| Element | Typical range |
|---|---|
| Windows, made to measure Nine double glazed units in a white uPVC profile, with standard locks and handles. | £2,400 – £4,200 |
| Fitting Two fitters removing the old frames and fixing, packing and sealing the new ones over two or three days. | £1,000 – £2,100 |
| Removal and disposal Taking out and disposing of the old frames, usually by skip or the installer's van. | £200 – £360 |
| Scaffolding or towers Only where the upstairs windows cannot be reached safely from ladders or from inside. | £0 – £780 |
| Making good Plastering and painting the reveals inside where the old frame came out. Often included, sometimes not. | £0 – £840 |
Guide prices including VAT. Your actual cost depends on your home, access and specification.
What moves the price of replacement windows for a 3-bed semi
- Number and size of windows
Each window is made to measure, so the price climbs with every extra one and with large panes. Doing the whole house at once usually brings the price per window down.
- Style
A plain casement is the cheapest. Tilt and turn, sliding sash and bay windows cost more, because there is more frame and more hardware in each.
- Colour and finish
White is the base price. Coloured and woodgrain foils add to it, more so when the colour is on both sides.
- Access
Where upstairs windows cannot be reached from inside, scaffolding is charged per side of the house and can be a noticeable part of the total.
- Who fits them
National brands typically quote well above local FENSA or CERTASS installers using the same kind of profile. Compare like for like on profile, glass and guarantee.
What should be in a quote for replacement windows for a 3-bed semi
If a quote is missing any of these, ask why before you compare it with another.
- The number of windows, each one's size and style, and which panes open
- The frame profile or brand, its colour inside and out, and the guarantee on frames and glass
- The glass: its energy rating or U-value, whether it is toughened where it needs to be, and any obscure panes
- Removal and disposal of the old windows and frames, and whether scaffolding is included
- Making good the plaster and reveals inside, and new sills and trims
- FENSA or CERTASS registration, so the work is certified under Building Regulations
- Whether the guarantee is insurance-backed, and what deposit is asked for
Replacement windows for a 3-bed semi prices by region
Labour is most of the difference. Typical price (3-bed semi, nine uPVC casement windows, fitted), including VAT.
| Region | Typical | vs UK average |
|---|---|---|
| London | £6,200 | +25% |
| South East | £5,800 | +17% |
| South West | £5,500 | +10% |
| East of England | £5,300 | +6% |
| West Midlands | £5,200 | +4% |
| Scotland | £5,100 | +2% |
| East Midlands | £5,000 | UK average |
| Yorkshire and the Humber | £5,000 | UK average |
| North West | £4,900 | −2% |
| North East | £4,700 | −5% |
| Wales | £4,700 | −6% |
| Northern Ireland | £4,400 | −12% |
Common questions
How many windows does a 3-bed semi have?
Most have between eight and ten, counting the front bay or window, the three bedrooms, the bathroom and the kitchen. Check the count on every quote, because it is the number that moves the total most.
How long does it take to replace the windows in a semi?
Two fitters usually take two or three days for a whole house. Larger or more complicated jobs, such as a bay with structural work, can run longer.
Is a lower quote always cheaper?
Not necessarily. Compare the profile, the glass rating, whether removal, scaffolding and making good are included, and the guarantee. A low figure that leaves some of those out can end up costing more.
Where the replacement windows for a 3-bed semi prices come from
We store each price without VAT and add it back for display. These are the published guides behind the figures:
- BestBuilders, double glazing cost UK, Q3 2026: whole-house table, fitted, VAT stated as included (divided by 1.2 to store ex-VAT)
- MyJobQuote, uPVC windows cost, 9 July 2026: whole-house estimates, fitted; VAT treatment not stated, so treated as VAT-inclusive and divided by 1.2 to store ex-VAT
- ExpertSure, window costs UK, prices verified October 2026: supply and fit, VAT stated as included (divided by 1.2 to store ex-VAT)
- Federation of Master Builders, cost to double glaze a three-bed house, 2026: cross-check only, not used in the range because it prices the windows without fitting and does not state VAT
- HMRC VAT Notice 708/6: glazing is not an energy-saving material, so the standard rate applies
Get quotes for your home
A guide price only takes you so far. Local firms can price the work on your own home, and comparing a few quotes is the quickest way to see what is reasonable.
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