London Box Sash Windows Ltd

26/04/2026

Victorian Windows done right.

Crisp white sash windows, original character intact, modern performance built in.

11/04/2026

From raw timber to flawless finish.

Accoya sashes being sprayed with Teknos, precision, consistency, and durability in every coat. Built to last, finished to stand out.

31/03/2026

A day in the life at London Box Sash.

From raw timber to finished windows, every step is done with care, precision, and a proper team behind it. No shortcuts, just consistent graft and attention to detail.

Proud of what the team produces day in, day out 👊

28/03/2026

Bringing Victorian character into the modern day.

This South West London home has had its tsingle-glazed sash windows replaced with new double-glazed timber sashes, keeping every bit of its original charm, just without the draughts.

✔️ Traditional detailing preserved
✔️ Improved warmth & efficiency
✔️ Seamless fit with existing architecture

Proof you don’t have to compromise on heritage to get modern performance.

22/03/2026

South East London done properly.

This home has been upgraded from original single glazed sash windows to high-performance double glazed sash windows without losing an ounce of its character.

Arched heads, gauged brickwork, detailed mouldings… all carefully retained and matched, with new sashes designed to sit perfectly within the original style. Double glazing and acoustic draft seal means improved warmth, less noise, and better efficiency, while still looking exactly as it should from the street.

Modern performance.
Traditional appearance.
No compromises.

This is how period properties should be upgraded.

14/03/2026

Victorian homes around Dulwich are full of quiet architectural details that most people walk past without noticing.

One of our favourites is the decorative sash horn bracket and dentil moulding beneath the meeting rail — a small but elegant feature that adds depth and character to the façade. Details like this were common in late-Victorian and Edwardian houses and helped elevate what would otherwise be a simple sash window into a real architectural focal point.

When we make new windows for homes in Dulwich, we reproduce these details carefully in our South London factory using Accoya timber, ensuring the proportions and mouldings stay true to the originals.

Because with period homes, the small details are what make the building feel right.

Crafted in our factory. Installed across London.

PeriodHomes SouthLondon ArchitecturalDetails LondonBoxSashWindows

20/10/2025

15/10/2025

New Accoya Sash Windows installed in this beautiful London home.

23/07/2025

🎉 We’re thrilled to announce that London Box Sash Windows is a Finalist for the Family Business of the Year Award 2025 at the British Business Excellence Awards! 🏆✨

Thank you to our amazing team, loyal customers, and supporters who make what we do possible every single day. 💪

11/02/2023