London Box Sash Windows Ltd

London Box Sash Windows Ltd London's leading traditional timber sash window specialists. With more than 30 years as a family owned and run company, we understand our customers’ needs.

London Box Sash Windows is London’s leading premium manufacturer and installer of traditional timber sash windows and doors. Operating out of our factory in southwest London, our product range includes sash windows, casement windows, doors and a varied amount of bespoke commissions. That’s why we produce a quality product with a high level of customer service every time. Our goal at London Box Sash Windows is to meet targets on price, quality and service. Together with our dedicated team, we are committed to continuously improving and innovating our product, so our customers always get the best possible experience.

🔨 Rare opportunity – Bench Joiner / AssemblerOne of our experienced joiners will be retiring in May 2027, creating a rar...
26/08/2026

🔨 Rare opportunity – Bench Joiner / Assembler

One of our experienced joiners will be retiring in May 2027, creating a rare opportunity to join the London Box Sash team.

We don’t recruit very often, so we’re looking to bring the right person in well before the retirement date, allowing plenty of time for a proper handover and training. The position is available immediately for anyone ready to start sooner.

The role includes assembling timber box frames and sashes, preparing windows for painting, some machining, and working from technical drawings and our production software.

Ideally, you’ll have at least two years’ relevant experience, although we would also consider someone who has completed a three-year carpentry or joinery college course.

Working hours:

Monday–Thursday: 7:30am–4:30pm
Friday: 7:30am–1:30pm

Benefits include an early finish every Friday, quarterly bonuses, free parking and use of our on-site gym and recreational area.

Salary is dependent upon experience.

To apply, please send your CV to [email protected].

Please feel free to share or tag anyone who might be interested.

Proud to be finalists once again at the Lloyds British Business Excellence Awards 2026.Our second consecutive year being...
26/07/2026

Proud to be finalists once again at the Lloyds British Business Excellence Awards 2026.

Our second consecutive year being recognised, this time in the Customer Loyalty Award category.

A huge thank you to our customers and our fantastic team. On to the judging! 💪

Victorian Windows done right.Crisp white sash windows, original character intact, modern performance built in.
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 👊

Bringing Victorian character into the modern day.This South West London home has had its tsingle-glazed sash windows rep...
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.

South East London done properly.This home has been upgraded from original single glazed sash windows to high-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.

Victorian homes around Dulwich are full of quiet architectural details that most people walk past without noticing.One o...
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
New Accoya Sash Windows installed in this beautiful London home.
15/10/2025

New Accoya Sash Windows installed in this beautiful London home.

Address

London
CR43AF

Opening Hours

Monday 7:30am - 5pm
Tuesday 7:30am - 5pm
Wednesday 7:30am - 5pm
Thursday 7:30am - 5pm
Friday 7:30am - 5pm

Telephone

+442086484230

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