Bespoke Window Lead Times: What to Expect

Bespoke windows take longer than stock sizes because nothing is made until the openings have been surveyed and the order is confirmed. The lead time then depends on the frame profile and colour, the glass specification, whether the order includes doors or unusual shapes, and how busy manufacturing is at the time of year. 313 Glass gives a timescale at quotation stage for your specific order rather than a generic figure, and the free survey is the step that starts the clock.

From order to installation, standard uPVC windows typically take somewhere in the region of four to eight weeks to manufacture and install, while bespoke items such as coloured aluminium bi-folds or non-standard shapes can take longer. These are general industry ranges rather than guarantees, and your installer should give you a realistic estimate specific to your order once it is confirmed.

Standard sizes from stock ranges are generally quicker to produce than fully bespoke openings, which require custom manufacturing. If your property has non-standard window or door sizes, factor in a longer lead time and discuss this with your installer at quote stage so it doesn't come as a surprise later in the process.

Certain glass specifications, such as acoustic laminated units, specialist coatings, or bespoke decorative designs, can take longer to source and manufacture than standard double glazed units. If you have a firm deadline, it is worth asking your installer whether your chosen specification affects the lead time before you commit to it.

Like many home improvement trades, glazing installers often experience higher demand in spring and summer, which can extend lead times during these periods. Booking your survey and confirming your order earlier in the year, or being flexible with your preferred installation window, can sometimes help avoid the busiest periods.

If your project requires planning permission, listed building consent, or significant structural alterations such as a new steel lintel, these processes can add weeks or months to your overall timeline before installation can even be scheduled. It is worth establishing early whether any such requirements apply to your project.

Ask your installer for a written estimate of lead time as part of your quote, and build in some contingency if you have a fixed event or deadline in mind, such as hosting a family occasion. Being upfront about your timeframe when you book your survey allows the installer to flag any potential issues early.