Bay Sash Windows London

Bespoke Timber Bay Sash Windows in London

The bay window is one of the defining features of London's Victorian and Edwardian terraces — and when it's done right in timber, it transforms a room. We design, build and fit made-to-measure bay sash windows across London, matched exactly to your property and finished to a standard that lasts for generations.

A bay window projects outward from the face of the building rather than sitting flat in the wall. A classic bay has a wide central sash flanked by two angled side windows, which pulls in far more daylight and adds a genuine sense of extra space inside — a window seat, a reading nook, room to breathe.

Every bay we make is bespoke. We copy your original glazing bars, horns, sill profiles and proportions so the new windows read as part of the house, not an addition — whether that's a single front-room bay or a full two-storey elevation.

Why Timber Bay Windows?

Timber vs. uPVC Bay Windows

A bay is the focal point of a period façade, and uPVC simply can't carry it — the chunky frames, flat profiles and yellowing plastic look wrong on a Victorian or Georgian home, and they can never be refreshed. Timber belongs there. Its slim sightlines and natural warmth sit beautifully against London brickwork.

We build in Accoya® engineered timber, which resists swelling and warping from moisture far better than ordinary softwood — so your sashes keep sliding smoothly through humid summers and wet winters. And unlike plastic, a well-maintained timber bay can be repainted indefinitely as your colour scheme changes.

All of our timber is sourced from sustainably managed forests, so a beautiful bay also carries a genuine environmental benefit. If you'd like to compare the eras and styles first, see our guide to sash window styles.

Bay Window Styles We Make

Bay windows come in several configurations, and the right one depends on the age and architecture of your home. We make them all in bespoke timber:

Double Glazed Bay Windows

A bay is a big expanse of glass, so it's often the coldest, draughtiest part of a period room. Double glazing a bay window makes one of the biggest differences you'll feel anywhere in the house.

We fit slimline double-glazed units — either retrofitted into your existing sashes or built into new ones — that are barely thicker than original single glazing, so the period look is preserved. The result is a warmer room, far less street noise, and an end to the morning condensation that plagues so many single-glazed bays. In a conservation area or listed building, slimline heritage glazing is often approved precisely because it looks identical to the original.

Restore or Replace Your Bay?

Not every bay needs replacing. Where the box frame and joinery are sound, a full sash window restoration brings a tired bay back to smooth, draught-free working order at a fraction of the cost — and we'll always tell you honestly which is the better route. Where the timber is beyond saving, or a previous owner fitted uPVC, we craft a complete timber sash window replacement to match the originals exactly. Either way, you keep the character of the house.

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