Brick house timber box sash windows and slate roof
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Crafting Timeless Elegance in Timber Windows & Doors

Quality, Value, Trust

Our expertly crafted timber windows offer superior durability and energy efficiency at an exceptional value. With a reputation for excellence and customer satisfaction, you can trust us to deliver the perfect windows for your home.

Timber windows & doors tailored to match your unique style

Box Sash Windows

Our beatiful box sash windows are designed to enhance energy efficiency while preserving the classic charm of period homes, our timber sash windows combine traditional aesthetics with modern performance. Each window is professionally painted in-house, with a wide selection of RAL colours available to match your style.

We offer expert sash window installation across London, Hertfordshire, and the Chilterns, ensuring a seamless fit for your home.

lady looking out of her timber box sash window in her lovely home in North London, Islington

Casement Windows

Grain casement windows are available in two distinct styles: classic casement and flush casement. Both can be fully customised to suit your unique design preferences.

We specialise in manufacturing and installing traditional timber casement windows, expertly designed for period properties. We create bespoke wooden casement windows that blend classic aesthetics with modern performance.

Our high-quality replacement timber casement windows offer exceptional energy efficiency, ensuring your home stays warm while preserving its historic charm.

Modern black timber barn conversion with casement windows. Property in hertfordshire

External Timber Doors

All our external timber doors are available in a range of styles, including traditional and contemporary designs. Each door can be fully customised to match your unique vision and home’s character.

We specialise in crafting and installing premium wooden front doors, expertly designed for both period and modern properties. Our bespoke timber doors combine timeless elegance with advanced security and durability.

Built for energy efficiency and long-lasting performance, our high-quality timber doors enhance your home’s warmth, security, and curb appeal while maintaining its authentic charm.

Victorian-style green timber front door with arched white trim, brick exterior, and tiled walkway. Property in London

Need more of a custom approach? We’ll work with you to bring your unique ideas to life.

Why choose
Grain Windows

Handmade


Handmade windows offer unmatched attention to detail, craftsmanship, and customisation, ensuring a perfect fit for any home. Skilled artisans use traditional techniques and high-quality materials, creating durable, unique windows that enhance aesthetics and functionality while adding timeless character to your space.

First class
customer service


Grain Windows offers first-in-class customer service that is unparalleled in the industry, our dedicated team that ensures each customer's needs are met with precision and care. We go above and beyond to provide tailored solutions, ensuring a seamless and satisfying experience from consultation to installation.

Absolute
confidence


Our team of window fitters and installers are fully qualified, providing you with absolute confidence in our work. All installations are backed by FENSA certification, ensuring they meet the highest industry standards for safety and quality.

Testimonials

Would you like to speak with an advisor?

Our friendly team will be pleased to help with any questions you may have about our timber windows and doors.
Just fill in our contact form and we will aim to be in touch with 24hrs.