Cat Flap in Glass Door Cost — UK Prices from £280
Honest guide to cat flap installation in a glass door across the UK. Every price includes a brand-new toughened glass panel, the cat flap itself and full professional fitting — no hidden extras.
Cat Flap in Glass Door — Price List
Prices vary depending on door type, cat flap choice and location. The figures below are typical for our North West, Cheshire, Staffordshire, Yorkshire and North Wales coverage area — once we've quoted your job, what we quote is what you pay.
| Installation | From | What's included |
|---|---|---|
| Cat flap in single-glazed glass door | £280 | New 4mm toughened panel + hole, supply & fit |
| Cat flap in double-glazed glass door | £320 | New sealed double-glazed unit with pre-cut hole |
| Cat flap in triple-glazed glass door | £380 | Custom triple-glazed unit, full installation |
| Cat flap in patio / sliding door (glass) | £300 | Toughened panel into existing patio frame |
| Cat flap in French door (glass panel) | £280 | Per door panel, includes microchip flap option |
| Dog flap in glass door (small / medium) | £320 | Larger aperture, Pet-Tek G-SDDB or G-SDDL |
| Glass-only replacement (you supply flap) | £220 | New toughened panel pre-cut for your existing flap |
All prices include VAT, full supply and fit, removal of old glass and our 3-year workmanship guarantee.
What Affects the Cost of a Cat Flap in a Glass Door?
Glass thickness
4mm single-glazed is cheapest; 24mm double-glazed and 28mm triple-glazed units cost more to manufacture.
Cat flap brand
Pet-Tek glass-fitting flaps start cheapest. SureFlap Microchip adds ~£90, SureFlap DualScan ~£120, Closer Pets Microchip ~£70.
Frame type
uPVC and aluminium frames are straightforward. Timber frames may need extra prep.
Aperture size
Standard cat aperture ~165mm. Dog flaps require larger cut-outs (up to 290mm), increasing glass cost.
Travel & location
Within 30 miles of Bolton is included. Outer areas may attract a small mileage charge.
Why Glass Door Cat Flap Fitting Needs a New Panel
Every modern glass door uses toughened safety glass — once it's been tempered at the factory, it cannot be cut, drilled or modified. Any attempt to cut it causes the entire panel to shatter into thousands of small pieces.
That's why every professional cat flap in glass door installation includes a brand-new toughened glass panel, manufactured to the exact size of your existing pane with the cat flap aperture cut before tempering. Anyone offering to cut your existing glass is either uninformed or working with non-safety glass — which is illegal in external doors under UK Building Regs (Part N / Approved Document K).
The good news: a new toughened panel often improves your door — a fresh, clear pane with crisp edges and new sealing rubbers.
Related Pages
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Cat Flap in Glass Door Cost FAQs
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