Premium Manufacturing & Installation for Developers and Architects

Sash Windows London specialises in heritage and listed properties, supporting clients across the capital for more than 20 years. Our experienced team provides expert guidance at every stage of your project, whether you’re an architect or contractor.

Our Timber Windows & Doors

All of our timber windows and doors are crafted in our UK workshop using state-of-the-art technology and meticulous attention to detail. We offer a comprehensive range of products, including timber sash windows, timber casement windows, and a full selection of timber external doors.
From technical advice and CAD design to project planning, manufacturing, and installation, we deliver a complete end-to-end service. As a FENSA-registered company, all installations come with a 10-year insurance-backed warranty provided by Installsure.

Our Services

01 Commercial and residential

02 Surveying and CAD

03 Technical support

04 Project management

05 Supply only or supply and fix option

06 Health and safety certification

07 Cornwall-based factory

08 10-year insurance-backed warranty on installations

09 Constructionline accredited

Our Products

Perfect for period properties, our timber sash windows are crafted from high-quality, sustainably sourced timber. These windows offer excellent durability, energy efficiency, and sound insulation. For a high-performance window that preserves your home’s historic charm while offering modern glazing benefits, our timber sash windows are the ideal choice. They combine traditional aesthetics with contemporary performance seamlessly.
Perfect for period properties, our timber sash windows are crafted from high-quality, sustainably sourced timber. These windows offer excellent durability, energy efficiency, and sound insulation. For a high-performance window that preserves your home’s historic charm while offering modern glazing benefits, our timber sash windows are the ideal choice. They combine traditional aesthetics with contemporary performance seamlessly.
Perfect for period properties, our timber sash windows are crafted from high-quality, sustainably sourced timber. These windows offer excellent durability, energy efficiency, and sound insulation. For a high-performance window that preserves your home’s historic charm while offering modern glazing benefits, our timber sash windows are the ideal choice. They combine traditional aesthetics with contemporary performance seamlessly.
Perfect for period properties, our timber sash windows are crafted from high-quality, sustainably sourced timber. These windows offer excellent durability, energy efficiency, and sound insulation. For a high-performance window that preserves your home’s historic charm while offering modern glazing benefits, our timber sash windows are the ideal choice. They combine traditional aesthetics with contemporary performance seamlessly.

Peace of Mind Assured With Our Range of Warranties

We understand the essentials of high-quality Timber, designing our range for long-term use, whether installed in a traditional countryside property or a modern urban home.
By combining a classic design with the latest in security and energy efficiency, we can provide a durable, high-strength product every time. We believe in underlining this commitment to quality with several clear warranties.

30-year guarantee on timber

10-year guarantee on Paint finish

5-year warranty on ironmongery & seals

10 years on Workmanship

10 years on Glazing

Why Choose Us?

01 Unrivalled knowledge and expertise

Our windows are hand-crafted using time-honoured techniques, reflecting the elegance of traditional British homes. Ideal for heritage restorations, we maintain the aesthetic integrity of period properties.

02 Bespoke Craftsmanship

Each window is crafted to your exact specifications, blending traditional techniques with modern innovation.

03 Sustainability Commitment

Our FSC® certified timber and energy-efficient designs reflect our dedication to environmental responsibility.

04 Comprehensive Warranty

Our 10-year warranty on timber finishes underscores our confidence in the longevity of our products.

05 Local Understanding

As fellow Londoners, we appreciate the unique character of your neighbourhood and property.