We supply and fit aluminium windows, doors and glazing repairs across Londonderry and the surrounding County Londonderry area, covering BT47, BT48. Typical supplied-and-fitted cost for a standard 1200 × 1200mm casement in Londonderry is £620–£920.
Londonderry housing is dominated by a walled historic core, Victorian terraces across the city, and Atlantic-exposed property that sees the highest wind-driven rain figures in the UK. That matters, because the right window is the one that suits the stock — not the one the salesperson has in the van.
Londonderry has a protected walled city where heritage window profiles are commonly required. Replacing windows is permitted development for most houses, but a conservation area with an Article 4 direction removes that right, flats have no permitted development rights at all, and a listed building always needs listed building consent.
Check with Derry City and Strabane District Council before you order anything. A pre-application conversation costs nothing; an enforcement notice costs a great deal. In practice, conservation officers object to thick sightlines rather than to aluminium as a material — which is exactly why a slim aluminium heritage profile is routinely accepted where uPVC is refused.
Londonderry sits close enough to salt water that the powder-coat specification genuinely matters. A standard polyester powder coat within a mile or two of the coast will begin to chalk and pit years before its guarantee expires. Specify Qualicoat Seaside grade, which uses a heavier pre-treatment developed for marine environments, and rinse the frames with fresh water a few times a year.
This is a specification issue, not an upsell. If a quote for a coastal Londonderry property does not mention marine-grade coating, ask why.
Londonderry sits in the Northern Ireland pricing band, which runs at roughly 88% the national average. These are supplied-and-fitted ranges including VAT.
| Job | Typical cost |
|---|---|
| Casement window, approx. 600 × 900mm supplied & fitted | £460 – £670 |
| Casement window, approx. 1200 × 1200mm supplied & fitted | £620 – £920 |
| Casement window, approx. 1800 × 1200mm supplied & fitted | £860 – £1,280 |
| Tilt & turn window, approx. 1200 × 1200mm supplied & fitted | £750 – £1,100 |
| Three-section bay window supplied & fitted | £1,940 – £3,170 |
| Bi-fold door, 3 panes, approx. 3m supplied & fitted | £3,340 – £5,280 |
| Whole house, 3-bed semi (8–10 windows) supplied & fitted | £5,720 – £9,680 |
Ranges include VAT and installation. Final price depends on size, spec, access and site condition — a survey gives you a fixed number.
Most window faults are repairs, not replacements. A misted unit is £80–£190 and keeps your existing frame. A handle is £40–£100. A dropped sash is usually a hinge, at £60–£110. And if a window is broken or a door will not lock, we treat it as an emergency — same day where a fitter is free in your BT postcode, next day everywhere else.
| Job | Typical cost |
|---|---|
| Misted / blown double glazed unit, replaced per unit | £80 – £190 |
| Same-day glass replacement, standard pane per pane | £120 – £280 |
| Emergency boarding up per opening | £90 – £180 |
| Window or door handle replaced per handle | £40 – £100 |
| Friction hinge replaced per hinge | £60 – £110 |
| Lock / locking mechanism replaced per lock | £80 – £180 |
Ranges include VAT and installation. Final price depends on size, spec, access and site condition — a survey gives you a fixed number.
We cover BT47, BT48, plus the wider Derry City and Strabane District Council area.
A standard 1200 × 1200mm aluminium casement window typically costs £620–£920 supplied and fitted in Londonderry, reflecting Northern Ireland pricing. A small window runs £460–£670 and a large one £860–£1,280. A full three-bed semi generally lands between £5,720 and £9,680.
We cover BT47, BT48 and the surrounding County Londonderry area. If you are just outside, put your postcode on the quote form and we will confirm your local installer and lead time.
For most houses, no — it is permitted development. But Londonderry has a protected walled city where heritage window profiles are commonly required, so check with Derry City and Strabane District Council before you order: a conservation area with an Article 4 direction removes permitted development rights, and a listed building always needs consent.
Yes. Broken glass, a door that will not lock, a break-in or storm damage are treated as emergencies — same day where a fitter is free in your postcode, next day everywhere else. Boarding up is £90–£180 and same-day glass replacement £120–£280.
Free survey, fixed price, no pressure. Or call us and we'll give you a realistic ballpark in five minutes.
