Double Glazing Letchworth
Apex Windows supplies and fits uPVC Windows in Letchworth Garden City and across North Hertfordshire, from the original Arts and Crafts homes near the Broadway to the newer stock around Jackmans and the Grange Estate. Every window and door is made to measure, giving you warmer rooms and a more secure home whatever your property’s age.
Prices include VAT and fitting, with no hidden costs and no rep knocking on your door first. Get a real price on windows or doors using the instant online calculator in under 10 seconds.
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Use our online calculator and get a quote in LESS THAN 10 SECONDS!
All prices include fitting & VAT. No hidden extras.
Why Choose Apex Windows in Letchworth?
Most double glazing companies still send a salesperson to your home before giving you a price.
Apex doesn’t.
You get a real, accurate quote online in under 10 seconds. No appointment, no waiting in for a rep, no commission-driven sales pitch on your doorstep, whether that’s a period terrace near the Broadway or a 1970s semi on the Grange Estate. North Hertfordshire’s average home sits at an EPC rating of D, and Letchworth’s older stock is a big part of that. An online price means you can compare your options without giving up an evening first.
Apex has been trading for over 35 years. We’re based in Luton and cover Letchworth Garden City and the wider North Hertfordshire area, including Hitchin, Baldock and Stevenage. Every fitter is directly employed. No subcontractors, so the standard of work stays consistent from one job to the next.
Every installation comes with a 10-year insurance-backed guarantee through InstallSure. We’re FENSA registered (No. 31157), endorsed by Which? Trusted Traders, and rated 9.83/10 on Checkatrade.
About Apex Windows
Apex Windows has been fitting windows and doors in Letchworth Garden City and across North Hertfordshire since 1989. We’re an independent installer, not a franchise or a call centre passing your details to a local fitter.
Every member of our team is directly employed. No middlemen, no subcontractors, which keeps standards consistent and pricing competitive. Every quote includes VAT and fitting from the outset. No hidden costs added later.
Our Double Glazing Service in Letchworth
Letchworth’s housing splits sharply by postcode. SG6 3, the original 1903 garden city core around the Broadway and Norton Way South, holds Arts and Crafts terraces and flats, many under Heritage Foundation covenants. SG6 4, to the north, covers later stock from the Grange Estate, Jackmans, and Manor Park, built mostly from the 1960s onwards with far fewer restrictions. Two very different starting points for a window or door upgrade.
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uPVC windows in Letchworth
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Composite and uPVC doors in Letchworth
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Conservatories in Hertford
Casement windows are the straightforward upgrade for Grange Estate and Jackman’s semis. Sliding sash and flush sash windows are a better fit nearer to Broadway, where the original Arts and Crafts joinery sets the tone, and any part of the town centre falls under North Herts Council’s Article 4 direction. That means window replacements there need planning permission first, even changes that would normally count as permitted development.
Double glazing is A+13 rated; triple glazing is A++21 rated, both worth checking against North Hertfordshire’s average EPC rating of D. All prices include VAT and fitting. Existing double glazing that’s failed rather than needing full replacement can be repaired, with replacement sealed units fitted where needed.
Composite and uPVC front doors, patio and French doors all come with multi-point locking and toughened safety glass as standard. For homes backing onto the A505 or nearer the station corridor, where the London King’s Cross line runs through at up to four trains an hour at peak times, the same toughened glass and tight seals that improve security also cut down on transmitted noise.
Prices include VAT and fitting throughout, no extras added later.
Many older Hertford properties benefit from deep rear plots, making them ideal for traditional conservatories. We design and install Victorian conservatories and square-plan Edwardian conservatories to match your home’s original brickwork and era.
Our directly employed fitters manage the entire build under a 10-year InstallSure guarantee. Speak to our team to discuss your project.
What Our Customers Say
Frequently Asked Questions
Do I need planning permission to replace windows in Letchworth town centre?
Possibly, yes. North Herts Council has an Article 4 direction covering Letchworth Garden City town centre, alongside Baldock, Hitchin and Royston. That removes the usual permitted development rights for window replacements, so changes that would normally need no paperwork, including material and glazing bar style, require a planning application first. Check the Planning Portal or contact North Herts Council directly to confirm whether your specific property falls inside the boundary before booking any work.
Will new windows or doors cut down noise from the A505 or the railway line?
Yes, noticeably. Properties near the A505/A1(M) junction or the London King’s Cross line through Letchworth Garden City station benefit most, since the sealed unit and toughened glass reduce transmitted sound as well as heat loss. Triple glazing, rated A++21, gives the biggest reduction for homes closest to either. It won’t remove traffic or train noise entirely, but it takes the edge off.
My home's on the Grange Estate and the double glazing is original from the 1970s. Is it worth replacing, or can it be repaired?
It depends on what’s failed. If the seals have gone and you’re getting condensation between the panes, a replacement sealed unit often solves it without needing a new frame. If the frames themselves are warped or the locking mechanism has failed, full replacement is the better long-term fix. Either way, 1970s double glazing is well past the point where A+13-rated modern glazing pays for itself in reduced heat loss.
Is there any grant support for replacing old windows in North Hertfordshire?
Yes. North Herts Council runs the Warm Homes: Local Grant with the National Energy Foundation, offering up to £30,000 per home towards energy efficiency improvements, including double or triple glazing, for homes rated EPC D, E, F or G. Certain postcodes in Letchworth automatically qualify. Eligibility and funding levels vary, so check current criteria directly with the council before assuming your home is covered.
What's the difference between sash and casement windows for a period property near the Broadway?
Sliding sash and flush sash windows keep the vertical opening and slim sightlines that period Arts and Crafts properties were built with, which matters if you’re inside the Article 4 boundary and need to preserve the original look. Casement windows open outward on a hinge and suit later stock better, where there’s no conservation requirement to match. Both are available in A+13-rated double glazing or A++21-rated triple glazing.
Are you FENSA registered?
Yes. Apex Windows is FENSA registered, No. 31157, which confirms every installation meets current building regulations and energy efficiency requirements. You’ll get a FENSA certificate after the work is complete, which you’ll need if you sell the property later.
Do I need to wait for a salesperson to visit before I can get a price?
No. Apex’s instant online calculator gives you a real price on windows, doors, or conservatories in under 10 seconds, no appointment and no rep on your doorstep. If you’d rather talk it through first, speak to our team directly.
Need to speak to someone?
Call us today and speak to our friendly team who are ready to help discuss your needs.
Office Hours: Mon - Fri | 08:00 - 17:00