How much should I budget for security secondary glazing in Blackheath?
Our guide range for security secondary glazing in Blackheath is £594 to £1,794 including VAT (£495 to £1,495 plus VAT) per window, including fitting. The survey is free for new installations and your fixed price follows in writing.
Security secondary glazing is a separate slim window fitted on the room side of an existing window, glazed with laminated glass so it forms a second barrier. It leaves the original window untouched outside, which makes it a common choice for listed buildings, conservation areas and period sash windows.
What goes into security secondary glazing
- Colour-matched frames to suit the room
- Noise and draught reduction
- Vertical sliding, horizontal sliding, hinged and lift-out styles
- Fixed within the reveal, leaving the original window untouched
- Suits sash, casement and arched openings
- Locks and catches that open from inside without a key
Fitting in Blackheath and nearby
Surveys in Blackheath (SE3) are booked around installer availability. We also cover nearby Greenwich (1 mile), Catford (2 miles) and Eltham (2 miles).
Greater London has every kind of glazing, from Georgian sashes and Victorian bays in conservation areas to high-street shopfronts, office curtain walling and new-build flats.
Common uses:
- Listed homes and buildings in conservation areas
- Homes on busy roads wanting noise reduction
- Ground-floor flats in converted townhouses
- Offices in historic buildings
What to think about first
How it opens
Match the opening style to the original window so both can be opened, cleaned and used for ventilation.
Listed building consent
Internal secondary glazing is usually seen as reversible, but consent can still be needed. Check with the conservation officer first.
Consents and safety: England
Planning permission
Changing the glass in an existing window or shopfront does not usually need planning permission, because the building looks much the same afterwards. A new or altered shopfront, or security features added to the outside of a building, may need planning permission from the council. Bollards or barriers on the pavement need the highway authority's consent, which is normally the council.
Listed buildings and conservation areas
In England, listed building consent from the council may be needed to replace historic glass such as crown or cylinder glass, or to alter glazing bars, sashes and frames. Historic England publishes guidance on traditional windows. Secondary glazing and window film are often easier to agree because they can be removed later, but the council's conservation officer makes the decision.
How it works
- Send sizes or use the quote tool
- Free survey at your Blackheath address
- Fixed price in writing
- Glass made, then fitted
Security secondary glazing in Blackheath: questions
Can you survey in Blackheath and nearby towns?
Yes. Surveys in Blackheath, Greenwich and Catford are booked around installer availability.
Does secondary glazing reduce noise?
Yes, often noticeably, because of the air gap between the two panes. Laminated glass helps further.
Will secondary glazing cause condensation?
A well-fitted unit usually reduces condensation on the inner pane. Some ventilation of the gap may be needed, which we discuss at the survey.
Do I need permission for secondary glazing in a listed building?
It depends on the building and the council. Internal secondary glazing usually has less impact than replacement windows, but listed building consent may still be needed. Ask the conservation officer before ordering.
Security secondary glazing in nearby towns
Other glazing in Blackheath
- Broken glass replacement
- Counter and reception security screens
- Misted unit replacement with laminated glass
- Kiosk and booth security glazing
- Laminated security glass
- Laminated glass retrofit
Ready for a price? Use the form or call 0800 088 6248.