Bay and bow windows · England
Triple glazed bay and bow windows in Cornwall
Triple glazed bay and bow windows across Cornwall: free survey, written fixed quote, and fitting by installation teams working for us. Towns we cover include Redruth, Falmouth and Launceston.
Three- and five-light bays, structure checked and supported. A bay window projects out from the wall in angled sections; a bow window curves in more, shallower sections.
Guide prices across Cornwall
3-light bay
three windows, about 2.7 m across
£2,995 – £3,795inc VAT · £2,495 – £3,160 ex VAT
- Triple glazed throughout
- Old frames removed and taken away
- Fitted, sealed and made good
5-light bay or bow
five windows, about 3.5 m across
£3,795 – £4,695inc VAT · £3,160 – £3,910 ex VAT
- Triple glazed throughout
- Old frames removed and taken away
- Fitted, sealed and made good
Two-storey bay
ground and first-floor bays
£5,995 – £7,495inc VAT · £4,995 – £6,245 ex VAT
- Triple glazed throughout
- Old frames removed and taken away
- Fitted, sealed and made good
Guide prices, supply and fit. The written quote after your survey fixes the price for the specification shown; anything extra is agreed with you first.
Towns in Cornwall
Rules in England
England requires replacement windows to achieve 1.4 W/m²K, or a Window Energy Rating of band B or better, which good triple glazing passes comfortably. Replacement windows are a controlled fitting. A competent person scheme installer (such as FENSA or Certass) self-certifies the work and notifies the council within 30 days; otherwise a building control body approves it.
Planning: Replacing windows on a house is normally permitted development if the new ones look similar. New upper-floor windows in a side wall must be obscure glazed and fixed, or open only above 1.7 m. Flats and maisonettes have no householder permitted development rights, so a change that alters their appearance needs planning permission. An Article 4 direction in a conservation area may mean permission is needed, and listed buildings need listed building consent.
How it works
You will know exactly what you are buying: the quote states the unit build-up, frame, finish, fitting work and how Building Regulations compliance is handled. On fitting day each opening is replaced and closed up before the team moves on.
- Every opening measured, including escape and vent needs
- Frames rated for the weight of triple glass
- Old windows removed and taken away
- Each opening closed up the same day
Questions
How much does a triple glazed bay window cost?
Our guide starts at £2,995 for a three-light uPVC bay, fitted and inc VAT; UK quotes run from about £2,000 to £4,500.
Do bay windows need bay poles?
If the old frames carry load from above, yes. We check on survey and include support in the quote where needed.
Can I change a bay to a flat window?
That is a structural and planning change, not a like-for-like replacement. Ask and we will explain what it involves.
Do you cover all of Cornwall?
We arrange surveys and fitting across Cornwall.
Do I need permission for triple glazed bay and bow windows in England?
In England, like-for-like replacements on a house are normally permitted development; flats need permission if the change alters their appearance, Article 4 areas may need permission, and listed buildings need listed building consent.
Bay and bow windows in nearby areas of England
Other products in Cornwall
- uPVC windows
- Aluminium windows
- Timber windows
- Alu-clad timber windows
- Casement windows
- Flush casement windows
- Tilt and turn windows
- Sash windows
- Fixed and picture windows
- Composite front doors
- French doors
- Sliding patio doors
- Bifold doors
- Glass-only replacement
- Acoustic triple glazing
- Security glazing
- Whole-house replacement
- New builds and self-builds
- Period homes and conservation areas
- Flats and apartments
- Passivhaus and EnerPHit
Bay and bow windows across Cornwall
Written quote fixed for the specification, after a free survey. Building Regulations sign-off by a competent person scheme installer or building control, as the law requires in England.