KLIS JOINERY & CARPENTRY LTD
LONDON TIMBER SPECIALISTS
HIGHGATE| LONDON
Bespoke timber sash windows for Highgate’s Georgian, Victorian and Edwardian properties. Double glazed, draught-free, and made to suit one of London’s most carefully protected villages.
Highgate is one of the few parts of inner London that still reads as a village. The Georgian houses around the High Street, the Victorian villas on Hampstead Lane and The Grove, the Edwardian and Arts and Crafts properties on the surrounding roads — all of it sits within conservation areas overseen by three separate borough councils. On streets with over 500 listed buildings, the quality of any window work is held to a high standard.
Klis, Besi and the team attend every Highgate job in person. No call centres, no subcontractors.
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Highgate’s mix of periods and styles means there is no single window type — but every property has its own correct answer. We take measurements from your existing frames and reproduce profiles, glazing bars, meeting rail positions and sash weights precisely, so replacements belong to the building and the street.
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Almost all of Highgate sits within conservation areas administered by Camden, Haringey and Islington — three councils with their own specific requirements. The area also contains over 500 listed buildings, many requiring Listed Building Consent for any external window work. We know how each authority approaches this and can advise on what applies to your property before you plan anything.
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Everything is done in-house — survey, installation, finishing. The same team on every job, the same standard throughout. Nothing is passed out.
LONDON TRUSTS KLIS JOINERY & CARPENTRY FOR HONEST & ACCURATE ADVICE
We’ll look at your windows in person and give you a clear, honest steer on the right course of action. No obligation, no upselling. Free home visit across London.
Bespoke timber sash windows built to your exact proportions and fitted precisely in period and contemporary homes.
Bespoke bay and box bay windows designed and fitted to suit your home’s proportions and style.
Modern sealed units fitted into traditional timber frames. More warmth, better noise reduction, lower energy costs.
Stop cold air, reduce heating bills, and eliminate rattles in the home without having to replace your existing windows.
Broken cords, rattling sashes, jammed frames, and more. We restore original timber windows to full working order.
Looking for high-quality, handcrafted timber windows only? We supply bespoke sash and bay windows to clients and trade.
Surface rot can be managed, but once deterioration moves into the structural timber, no patch holds for long. Wood that has softened or crumbled at the sill or frame corners has lost the capacity to carry the window — at that point, replacement is the correct response.
Single-glazed sash windows in Highgate's period properties lose a significant amount of heat. Cold air at the frame, condensation on the glass or outside noise carrying through without much resistance all point to double glazing making a real and lasting difference.
Seized sashes, broken cords and frames that have shifted out of true are common in Highgate's older properties. Where a window can no longer be operated or sealed with any reliability, replacement is the more durable long-term solution.
We visit your Highgate property, assess your windows on-site and provide a written quote. No pressure, no obligation, no intermediaries.
Windows made to your exact specification and installed by our own team, keeping disruption to a minimum throughout.
Old frames taken away, site left tidy, every window checked before we go. We remain available if anything comes up after completion.
We install and repair timber sash windows across Highgate and the surrounding area. Not sure if we cover your road? Get in touch and we’ll let you know.
Get in touch with Klis Joinery & Carpentry to book a a free home visit and discuss your sash window requirements with no obligation.
We give straight, honest advice and let you make the call. No pressure, no sales tactics.
When the structural frame is sound, repair is the better starting point — failed cords, minor draughts, rattles and limited rot patches don’t require a full new window. Where the core timber has deteriorated past the point of reliable repair, or where you want to upgrade to double glazing, replacement is the right route. We’ll give you a straight view after seeing your windows in person, and we won’t suggest more than the situation requires.
Yes. Highgate has an unusually wide range of period styles — Georgian sashes on the High Street, Victorian two-over-two on the villas, Edwardian and Arts and Crafts configurations on the surrounding roads. We measure and record from your existing windows and replicate profiles, glazing bar layouts, meeting rails and proportions exactly, whatever the original period.
Yes. All our replacement sash windows are available with sealed double-glazed units within traditional timber frames — improved insulation and sound performance without altering the period look. In Highgate’s conservation areas, any glazing upgrade may need approval from the relevant council — we can advise on this when we visit. Triple glazing is also available.
Yes. Highgate is unusual in that its conservation area spans three borough councils — Camden, Haringey and Islington — each with their own planning requirements and design guidance. The area also contains over 500 listed buildings, where Listed Building Consent is required for any external window work. We’re familiar with all three councils’ approaches and can advise on exactly what your property and listing status will require before you make any decisions.
A standard job of two to four windows typically takes one to two days on site once the frames are made. Larger projects are scheduled to keep any opening exposed for as short a time as possible. You’ll have a clear programme from the survey stage onwards.
We use sustainably sourced African Sapele hardwood — stable, durable and well-suited to properties exposed to the elevation and weather conditions common in Highgate. All timber is treated before fitting. With repainting every five to seven years, a properly made timber sash window will last for decades. We cover the maintenance routine at handover.
Yes. Removal and disposal of old frames is included with every job — no extras. We protect surrounding walls, floors and finishes while we work, clear up fully before leaving, and test each window to confirm it opens, closes and seals as it should.
Price depends on window count, size, glazing specification and the requirements of the relevant conservation authority — which in Highgate may mean navigating more than one council. As a guide, fully installed replacement sash windows start from around £1,200 per window. A free home visit is the most reliable way to get an accurate figure — we’ll assess your windows and provide a written quote with no obligation.
