About Us | Bespoke Timber Windows & Doors

Grain Windows was founded by Billy Homan after numerous unsatisfactory experiences with other window companies. Determined to raise the standard, Billy established Grain Windows to deliver superior service and quality products within the timber market, always putting the customer first. This commitment is reflected in our exceptional communication and why our customers give us such great reviews.

  • At Grain Windows, we specialise in crafting beautifully designed timber windows and doors that combine traditional joinery with modern performance. Based in Hertfordshire and serving London, the Chilterns, and surrounding areas, our focus is on delivering high‑quality, bespoke timber joinery solutions that enhance both period and contemporary properties.

    Our team has extensive experience in designing, manufacturing, and installing bespoke timber windows — from traditional box sash windows and flush casement windows to French doors, sliding doors, and bespoke front and back doors. Whether you are renovating a period home, enhancing a family residence, or specifying windows for a high‑end development, we understand the importance of both aesthetics and performance.

Why choose
Grain Windows?


No matter the scale of your home or the scope of your project, Grain Windows is here to provide unparalleled service and exceptional results. Contact us today to see how we can bring your vision to life.

  • We believe in a collaborative approach. From the initial consultation and accurate site survey to the final fitting, we work closely with homeowners, architects, and contractors to ensure each project is delivered on time and to the highest standards. Every timber window and door we produce is made to measure, tailored to your specific design preferences, and built for longevity and energy efficiency.

    Quality and trust are at the heart of what we do. We are FENSA and CERTASS certified, and every installation is backed by a 10‑year warranty, giving you peace of mind alongside exceptional craftsmanship. Our products are designed to meet the demands of modern living while preserving the character of your property.

    At Grain Windows we’re passionate about sustainability, natural materials, and traditional skills. If you’re looking for bespoke timber windows or doors that are expertly manufactured, professionally installed, and built to last, we’d love to discuss your project.

- Customer-Centric Approach:

Our clients are our top priority. From initial consultation to final installation, we ensure clear, consistent communication and personalised service.

- Skilled Craftsmanship:

Our team consists of experienced professionals who bring precision and attention to detail to every project.

- Versatile Solutions:

We handle projects of all sizes and complexities, offering customised solutions that enhance the beauty and functionality of your home.

- Quality Assurance:

We use only the finest materials and latest techniques to ensure long-lasting, high-quality results.