A casement is the ordinary hinged window, and it is what most Hampshire homeowners are pricing when they ask for new windows. For uPVC casement windows the usual range runs from about £300 for one standard window to £6,500 for a whole house. Most of that gap is down to how many openings you have, not to the frame.
Typical casement window prices
Typical uPVC casement window costs in Hampshire, supplied and fitted
| Job size | What it usually covers | Typical cost |
|---|---|---|
| Small | One standard window, white | £300–£650 |
| Typical | Three to five windows, e.g. the front of a semi | £1,000–£2,800 |
| Large | Whole house, or coloured and flush-sash frames | £2,800–£6,500 |
Unit prices fall as the order grows. One window carries the installer's whole visit, while ten share it, which is why a house of twelve windows rarely costs twelve times the single-window figure. If you only need a couple of windows done, it is worth asking whether the installer will price the rest of the house at the same visit.
What pushes a quote up or down
- Sash style. A chamfered sash is the standard. Sculptured profiles cost a little more, and flush sashes, which sit level with the frame and copy timber joinery, cost more again.
- Colour. White is cheapest. Grey, cream and woodgrain foils carry a premium, and more if the colour runs through to the inside.
- Size and glass. Big openings need heavier glass and sometimes a reinforced frame. Toughened glass is required in some positions, such as low panes and next to doors.
- Opening arrangement. Fixed lights are cheaper than openers. A top-hung vent over a fixed pane often costs less than a full side-hung sash.
- Access. A first-floor window over a conservatory roof or a narrow side passage takes longer to fit.
- Making good. New sills, plaster repairs and external sealing are often quoted separately.
Hampshire details that affect the choice
Along the Solent shore, in places such as Southsea, Hayling Island and Lee-on-the-Solent, salt air is hard on cheap hinges and handles. The frame itself shrugs it off, so the hardware is where to ask questions: what the hinges and stays are made of, and whether the finish is rated for coastal use. Inland, the main complaint is condensation through the long damp winters, so ask whether trickle vents are included and where they will go.
A lot of Hampshire casement work is replacing first-generation uPVC from the 1980s and 1990s, particularly on the larger estates around Basingstoke, Eastleigh and the Southampton suburbs. Those frames often have failed seals or sagging hinges, and the thin walls of older profiles make them hard to repair. If only the glass has failed, the cheaper route is covered in our double glazing replacement service.
Two quotes can both say white uPVC casement and be different products. Ask each installer for the frame system by name, the glass specification and whether VAT is included, so the figures line up.
Checks before you sign
- Whether the price is per window or for the whole job
- Who removes and disposes of the old frames
- Certification through a competent person scheme such as FENSA, or building control sign-off
- Guarantee length on the frame, the glass and the hardware, and whether it transfers if you sell
- Whether the windows need egress sizing, for example in a bedroom above the ground floor
If you are weighing styles, a bay window costs more but changes a room, and the cost calculator lets you run your own numbers. If you are not sure the windows need replacing at all, start with our checklist of warning signs.
Frequently asked questions
How much do uPVC casement windows cost in Hampshire?
As a guide, one white window costs about £300–£650 fitted, three to five windows around £1,000–£2,800, and a whole house up to roughly £6,500.
Are flush sash casements worth the extra?
They look closer to painted timber, which suits older terraces and cottages. They cost more than a chamfered sash, so they tend to be worth it where appearance matters and less so on a modern estate.
Is it cheaper to replace all the windows at once?
Usually, per window. Fitting costs are shared across the order, so a whole-house job tends to cost less per opening than doing windows one at a time over several years.
Do I need planning permission for new casement windows?
Like-for-like replacement is usually allowed without it for ordinary houses, but conservation areas, listed buildings and flats can be different. Check with the local council before you order.
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