Window security grilles in Harpenden

How much do window security grilles cost in Harpenden?

Our guide range for window security grilles in Harpenden is £414 to £954 including VAT (£345 to £795 plus VAT) per window, including fitting. The survey is free for new installations and your fixed price follows in writing.

A window security grille is a steel barrier fitted across a window so that breaking the glass no longer gives a way in. It can be retractable, fixed or removable, and is most often fitted inside the reveal where it is protected and barely noticed from outside.

What you can specify

Anti-tamper fixings into masonry or a fabricated subframe
Works with uPVC, aluminium, timber and steel windows
Quick-release escape handle for bedroom and upstairs windows
Powder-coated in white, black or anthracite to sit with the frame colour
Lock positioned to clear window handles and restrictors
Made to measure for the reveal, including bays and splayed reveals

Fitting in Harpenden and nearby

We arrange surveys and fitting in Harpenden and across the AL5 postcode district, as well as in nearby St Albans (5 miles) and Luton (5 miles). Dates depend on installer availability.

Hertfordshire mixes the garden cities of Letchworth and Welwyn, post-war new towns such as Stevenage, and historic centres like St Albans.

Typical places for this kind of grille include:

Outbuildings, workshops and garages with glazing
Ground-floor and basement windows
Offices and shops with side or rear windows
Rear windows facing alleys and gardens

Things to decide before you order

Colour

White disappears against white frames, while black or anthracite suits darker frames and period sash windows.

Retractable, fixed or removable

Match the grille to how often the window opens. Daily-use windows suit retractable; never-opened windows suit fixed; occasional windows suit removable.

Rules that apply in England

England

Bedroom and escape windows

Approved Document B (fire safety) expects many habitable rooms in houses, especially first-floor rooms, to have an emergency escape window with an unobstructed opening of at least 0.33 m², at least 450 mm high and 450 mm wide, with the bottom of the opening no more than 1,100 mm above the floor. We only fit grilles over escape windows with a release that opens from inside without a key.

Grilles inside the glass

A grille fitted inside the glass does not normally need planning permission, because it does not materially change how the building looks from outside. If the building is listed, listed building consent may still be needed.

How it works

Send sizes or use the quote tool
Free survey at your Harpenden address
Fixed price in writing
Made to measure and fitted

Window security grilles in Harpenden: questions

Can you survey in Harpenden and nearby towns?

Yes. Surveys in Harpenden, St Albans, Luton and elsewhere in Hertfordshire are booked around installer availability.

Will a grille damage my window frame?

No. Grilles fix to the wall reveal or a subframe, not to the window itself, so the frame and its warranty are unaffected.

Should window grilles go inside or outside?

Inside in most cases. Internal grilles avoid weathering, are harder to attack, keep the outside of the building unchanged and rarely need planning permission. External grilles suit openings with no internal depth.

Do grilles work on bay windows?

Yes. A bay is usually treated as separate grilles for each face, or one grille following the bay on a curved or angled track.

Window security grilles in nearby towns

Other grilles in Harpenden

Ready for a price? Use the form or call 0800 088 6248.