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Bespoke timber windows and doors in London
At Repair a Sash, bespoke means timber windows and doors made for the specific requirements of a property and a project. Where standard production sizes, standard proportions, or standard details are not the right fit, bespoke manufacture allows us to work from what is actually there: the opening, the building, and the brief.
For London homeowners, that can mean anything from non-standard dimensions and difficult openings to heritage matching or a design that sits outside the usual range. Bespoke is not an added extra for its own sake. It is simply the right approach when a project needs something made properly rather than made to fit a standard range as closely as possible.
When bespoke is the right approach
Most bespoke projects tend to arise for a few clear reasons.
Non-standard dimensions are the most common. Many London period properties have openings that do not correspond to standard production sizes – particularly in Georgian and Victorian buildings where proportions were set by hand and vary from house to house, and sometimes from window to window within the same property. A standard unit will not fit correctly, and forcing one to do so usually means visible compromise in the result.
Unusual openings present a related challenge. Arched heads, angled reveals, deep reveals, irregular geometry, or openings created by building alteration all require windows or doors to be designed and made around what is actually there rather than adapted from what is available off the shelf.
Heritage matching is another frequent driver. Where original windows or doors have been lost and need to be reinstated to match surviving elements elsewhere on the building, the profiles, moulding details, glazing bar dimensions, and proportions must be right. Standard products rarely achieve this. Bespoke manufacture, worked up from careful measurement and observation of what remains, can.
Design-led requirements apply to a smaller number of projects, typically contemporary homes or extensions where the brief calls for something specific that cannot be achieved convincingly with an off-the-shelf product.
In all of these situations, bespoke is not a luxury upgrade. It is simply the appropriate route.
Bespoke timber windows and doors made around the property
Bespoke timber windows
Bespoke timber windows begin with the specific opening and the specific building, rather than a standard size or a standard specification. Some projects sit more naturally within a standard sash windows solution, while others need a more bespoke response from the outset. The same applies to casement windows, where standard solutions may suit some openings, but not all. This may involve bespoke wooden windows made to suit a non-standard opening, a specific set of proportions, or a requirement to match existing joinery more closely.
We take careful measurements, assess the surrounding context, and produce windows that fit the opening accurately and reflect the proportions and detailing appropriate to the property.
For period homes, this often means replicating profiles and glazing bar dimensions that match surviving original windows, or working from historical reference where originals have been lost. For more contemporary projects, it means building to a brief rather than selecting from a range. In both cases, the material, glazing specification, and finish are chosen to suit the project rather than defaulted from a standard option.
Bespoke timber doors
Bespoke timber doors follow the same logic. In some cases, a project can follow a more standard doors solution, but where dimensions, detailing, or proportions fall outside that range, bespoke manufacture becomes the better answer. The opening dimensions, the relationship of the door to the surrounding architecture, the glazing configuration, the ironmongery, and the finish all need to be considered as a whole.
Whether the project involves an entrance door, a glazed opening to the garden, or something less easily categorised, bespoke manufacture ensures the result is proportioned and detailed correctly for its setting.
For some properties, this is about reinstatement – putting back what was there originally, to a specification that matches the building’s character. For others, it is about achieving something considered and well-made that a standard product cannot deliver.
Materials, glazing and design details for made-to-measure windows and doors
Bespoke does not mean vague or improvised. Each project is specified with the same care as the rest of our work, with the material, glazing, finish, and detailing chosen to suit the property and the brief.
Timber options for bespoke projects include Accoya, for its exceptional stability and resistance to moisture; Red Grandis, a responsibly sourced hardwood with consistent grain and good durability; Oak, for projects where a strong natural character is appropriate; and Engineered Redwood, a stable and practical option for painted finishes. For larger and more demanding projects, we can also manufacture the windows or doors in a material chosen to suit the brief.
Glazing can be specified as single glazing where a traditional or heritage context requires it, double glazing for standard thermal performance, slimline double glazing where narrower units are needed to maintain original proportions, or vacuum glazing where maximum performance in the smallest possible profile is the priority.
Hardware and ironmongery are selected to complement the style of the window or door, and a full range of paint and stain finishes is available. Where matching existing joinery elsewhere on the building matters, we will work to get it right.
Where bespoke adds the most value
Period and character properties
Original buildings were not designed around today’s standard ranges. Bespoke manufacture is often the only way to produce windows or doors that sit correctly within a period property – dimensionally accurate, proportionally right, and detailed in a way that reflects the building’s age and character.
Where planning or listed building requirements apply, accurate reproduction or sympathetic new design is also more likely to satisfy the relevant authority than a standard product adapted to fit, and in some cases a more standard new sash windows approach may still be appropriate if the project does not require fully bespoke manufacture
Non-standard openings and difficult spaces
Buildings change over time. Openings are altered, extended, or created from scratch during renovation projects. Where the result is an opening that does not conform to a standard size or shape, bespoke manufacture is the natural answer – a window or door designed around what is there, rather than a standard unit selected in hope that it will be close enough.
One-off and design-led projects
For homeowners working with an architect, or those with a clear brief for something that does not exist in a standard range, bespoke manufacture provides the flexibility to work from a design rather than adapt from a catalogue. The same quality of material, craftsmanship, and installation applies regardless of whether the project is a heritage reinstatement or a contemporary one-off. Where the brief is less specialised, the new casement windows route may be the more appropriate fit.
The Repair a Sash bespoke process
The process begins with a conversation and a survey. We discuss the project, look at the opening or openings, and establish what is needed – dimensions, style, material preferences, glazing requirements, and any relevant planning or building context.
From that point, we develop the specification with you, confirming dimensions, detailing, timber species, glazing type, and finish before manufacture begins. Bespoke work is made to order, so the specification stage is important and we take the time to get it right.
Once manufacturing is complete, installation is carried out by our own team, with the same attention to fit and finish as on any other Repair a Sash project. All bespoke work is fully guaranteed.
FAQs about bespoke windows and doors in London
A bespoke window or door is one that is designed and manufactured specifically for the project rather than selected from a standard range. This typically means non-standard dimensions, specific proportions or detailing, heritage matching, or a brief that standard production cannot meet accurately.
Not exclusively. Bespoke work is also appropriate where standard products do not reflect the right proportions or detailing for a property, even if the opening itself is broadly conventional. For period homes in particular, the difference between a standard profile and a correctly proportioned profile can be significant.
Yes. Where surviving original windows or doors remain elsewhere on the building, we can work from careful measurement and observation to manufacture new elements that match them closely. This is one of the most common reasons homeowners come to us for bespoke work.
Yes. Much of our bespoke work is for period and character properties where proportions, detailing, or heritage matching matter, but bespoke manufacture can also be the right route for contemporary homes and extensions where the brief sits outside a standard range.
Why London homeowners choose Repair a Sash for bespoke work
Much of our work is in London’s period housing stock, and that background is directly relevant to bespoke projects. Bespoke joinery demands more than accurate dimensions alone. Fit, proportion, detailing, and finish all need to work together if the result is to sit naturally within the building.
We understand the proportions, profiles, and detailing of Georgian, Victorian, and Edwardian properties – and we know what it takes to produce work that sits naturally within the building rather than looking like a later compromise.
Our advice is practical and honest. If a standard product is genuinely the right answer, we will say so. If bespoke manufacture is what the project requires, we will specify it carefully and carry it out to a standard that does the property justice. We are FENSA registered, endorsed by Which? Trusted Traders, and all our work comes with guarantee protection through Installsure.
Book a survey for bespoke doors and windows in London
If you have a project that does not sit comfortably within a standard range, whether because of the opening, the proportions, the detailing, or the design brief, we would be glad to discuss it.
Get in touch with the team to arrange a no-obligation survey and clear advice on the most appropriate route for your property.
