KLIS SASH WINDOWS
LONDON TIMBER SPECIALISTS
CAMDEN | LONDON
Bespoke timber sash windows for Camden’s Georgian, Victorian and Edwardian properties. Double glazed, draught-free, and crafted to sit sympathetically alongside your home’s period character.
Camden’s housing stock spans centuries and styles — Georgian terraces in Bloomsbury and Primrose Hill, substantial Victorian and Edwardian villas climbing towards Hampstead Heath, and Arts and Crafts houses in Fitzjohns and Redington. What connects them is the sash window, and on streets where every property is architecturally significant, the quality of the work is not something you can hide.
We’re not a franchise, and you won’t deal with a call centre. Klis, Besi and the team visit every Camden job in person. No subcontractors, no handoffs.
01
On a street where every property carries architectural weight, a poorly matched profile or an incorrect glazing bar layout becomes obvious very quickly. We work from your existing windows to replicate every detail precisely — horn profiles, meeting rail dimensions, sash weights — so that replacements are genuinely indistinguishable from what was there before.
We work from your existing windows to replicate every detail precisely so that replacements are genuinely indistinguishable from what was there before.
02
Camden has 40 designated conservation areas covering roughly half the borough — Hampstead, Belsize, Primrose Hill, Bloomsbury, Redington/Frognal, Fitzjohns/Netherhall and Dartmouth Park among the most significant for period residential properties. Article 4 Directions in several of these areas remove permitted development rights entirely, meaning even window replacement can require a planning application. We know Camden’s requirements, and we can advise you on what applies to your property before you commit to anything.
We know Camden’s requirements, and we can advise you on what applies to your property before you commit to anything.
03
Every survey, installation and finishing detail is carried out by our own team. The same people, the same standard on every job — never passed to whoever happens to be available.
LONDON TRUSTS KLIS SASH WINDOWS FOR HONEST & ACCURATE ADVICE
We’ll come to you, look at your windows honestly, and give you a straightforward view on which route makes sense for your property. No upselling. No obligation. 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.
Once timber deterioration moves below the surface, any repair becomes a temporary fix rather than a solution. Soft or crumbling wood at the frame corners or along the sill indicates that the structure itself is failing — filler will not hold, and the window will continue to deteriorate.
Single-glazed sash windows in Camden's period properties can be responsible for a disproportionate share of heat loss. Cold air at the frame, persistent condensation on the glass, or street and traffic noise carrying into the room are all signs that double glazing will deliver a noticeable and lasting improvement.
Jammed sashes, failed cords and frames that have shifted out of square are typical issues in older Camden homes. Where the mechanism has deteriorated past the point of reliable function — or where the frame has moved so far that the window no longer seals — replacement is the more considered long-term answer.
We visit your Camden property, assess your windows in person and provide a detailed written quote. No call centres, no pressure, no obligation.
Your replacement sash windows are made to your exact specifications and fitted by our own team, keeping disruption to your household to a minimum.
Old frames taken away, the work area left clean and tidy, every window checked before we go. We remain available if anything comes up after completion.
We install and repair timber sash windows across Camden and the neighbouring areas. Not sure if we cover your street? Call or message us — we’re glad to help.
Get in touch with Klis Sash Windows for a no-obligation conversation and a free home visit to talk through your timber sash window requirements.
We don’t do hard sells. We’re here to give you clear, honest guidance so you can make the right decision for your property.
Repair is the better option when the underlying timber structure is still sound — failed cords, minor rattles, isolated patches of surface rot and small draughts can all be addressed without touching the whole window. Replacement becomes the right move when frames have deteriorated past the point of repair, when rot has penetrated the core timber, or when you’re looking to upgrade to double glazing. We’ll give you an honest assessment during a free home visit and only recommend replacement when it’s genuinely the right call.
Yes — period accuracy is at the core of what we do. We take measurements and details from your existing windows and replicate profiles, glazing bar configurations, meeting rail positions and proportions exactly. Whether your Camden property has Georgian two-over-two sashes, Victorian six-over-six, Edwardian horned frames or an unusual Arts and Crafts configuration, the replacements will be a precise match for what was there originally.
Yes. Every replacement sash window we make is available with sealed double-glazed units set into traditional timber frames — giving you a meaningful step up in thermal performance and noise reduction without altering the period look. Triple glazing is also an option, and it’s worth considering for Camden properties on busier roads or where maximum acoustic insulation is a priority.
Yes. Camden has some of the most stringent conservation area controls in London, and we’re experienced in working within them. Article 4 Directions in areas including Hampstead, Belsize, Primrose Hill and Fitzjohns/Netherhall mean that window replacement may require a full planning application rather than falling under permitted development. We’re familiar with Camden’s requirements and can advise on what applies to your specific property and listing status before you make any decisions.
For a standard residential project involving two to four windows, installation typically takes one to two days once the windows have been made. Larger jobs across a whole property are scheduled carefully to limit the time any opening is left exposed. You’ll get a clear programme when we visit, and we work to keep disruption to your home as brief as possible.
We use sustainably sourced African Sapele hardwood, selected for its dimensional stability and durability in the UK climate. All timber is treated before installation against moisture, rot and movement. Kept painted on a five to seven year cycle, well-made timber sash windows will perform well for decades. We’ll talk you through the best maintenance approach once the job is complete.
Yes, without exception. Full removal and disposal of existing frames is included in every job — there are no additional charges for this. We protect walls, floors and surrounding finishes throughout installation, leave every area clean before we go, and check each window fully before we leave to confirm it opens, closes and seals as it should.
Pricing depends on window size, quantity, glazing specification and any complexity involved in period matching or working within conservation area requirements. As a starting point, most replacement sash windows are priced from around £1,200 per window fully installed, varying with size and configuration. A free home visit is the most reliable way to get an accurate figure — we’ll look at your windows, discuss your priorities and produce a detailed written quote with no pressure to go ahead.
