From listed property restorations to high-end new builds, we collaborate with developers and construction teams to deliver bespoke timber windows and doors, offering fantastic product quality, competitive upfront prices, and reliable turnarounds. Designed and manufactured by Cornish craftspeople, Nine Zero is your ideal partner for high-quality timber products.
Working with Developers
How we collaborate on your project
Our larger-scale projects are typically handled by company director Steve Winscott personally, who brings decades of experience across both the window and door industry and the construction sector to each job. From the start, we’ll be able to meet on-site or in your office to host design workshops, flesh out ideas, and ensure the project is the right fit for our team. These early collaborations allow us to establish a clear vision, highlight what’s achievable, and align with your timelines.
Design
Our dedicated technical department will support you with full CAD drawings, detailed specifications, and tailored design packages. We'll provide the documentation and expertise you need to move forward with confidence, with full upfront quotes on all work.
Build
Using FSC-certified timber, we manufacture bespoke windows and doors to exacting standards. We offer competitive lead times of 6–8 weeks alongside a quick turnaround on quotes, helping you to meet your project milestones.
Collaboration
We’re available to liaise with your architects and clients throughout to ensure they’re happy. We also provide a full suite of technical literature and support to assist your team during installation, and can recommend skilled installers in your area if needed.
Delivering what you need
Tailored solutions
Whether you’re working on a listed building that requires strict design adherence or a looking for sleek looks to fit a high-end new build, we tailor our solutions to suit. Each timber window and door we create is completely bespoke, delivered in the style and finish you require.
Security credentials
Our timber windows and doors have Secured by Design (SBD) approval, making them some of the safest on the market. This means you and your clients can move forward with confidence, knowing the products meet rigorous, independently verified security benchmarks.
End-to-end partnerships
We build lasting relationships with our partners, supporting them through design workshops, site visits, and installation guidance. From the first consultation to the final installation, we’ll be there to support you.
Our bespoke windows and doors
Start your design journey here
Nine Zero delivers high-quality, bespoke timber windows and doors, working with developers across London and Surrey. Speak to our team about your needs today.
Choosing Nine Zero
- Proven industry experience: With roots in Sash Windows London (est. 2005), we bring decades of construction and joinery expertise.
- Collaborative approach: We work with your team, including architects and clients if needed, ensuring smooth project delivery.
- Technical documentation: We can offer in-house CAD resources, surveying capability, and technical guidance for every project.
- Sustainability and craftsmanship: Every product is crafted from FSC-certified timber in Cornwall, using waste-reducing processes, and finished with exceptional care.
- Industry-leading guarantees: We offer up to 30 years’ warranty on timber and 10 years’ warranty on workmanship, glazing, and finishes.
Working across the industry
We are a trusted partner for professionals across the building industry, delivering excellent products carefully tailored to their brief and budget.
Installers
We work with local installers to deliver the high-quality windows and doors their customers expect.
Architects
We deliver bespoke heritage solutions for architects, ideal for renovation projects and new builds.
Developers
With fast turnarounds, streamlined project management, and tailored products, we've built relationships with developers across London and the South West.
Our work on listed properties
In conservation areas, every detail matters. We specialise in timber windows and doors that respect the architectural integrity of Heritage properties while meeting modern performance standards.
Whether upgrading from single to double glazing, matching existing profiles, or navigating listed building requirements, we offer the same straightforward process. Speak to our team about our heritage range to find out more.
Contact us to get started
We partner with developers and other professionals on high-quality window and door supply. Designing and manufacturing in-house, we create products tailored to your design needs, with competitive upfront quotes.
Speak to a member of our team about your needs today to get started.
Sustainability
Environmental consciousness and sustainability are essential if we are to preserve a healthier planet for future generations. That’s why we’ve made a significant commitment to eco-friendly practices by establishing Nine Zero in the heart of Cornwall.
Since 2017, drawing on over 15 years of supplier expertise from our sister company Sash Windows London, we’ve set the bar for sustainable timber windows and doors. This was more than just an expansion; it represents our unwavering dedication to meet the growing demand for green building materials, while upholding the premium quality and unparalleled expertise that our customers have come to rely on.
Read moreRequest a brochure
To explore our range of sustainable timber windows and doors and imagine the possibilities for your project, request a Nine Zero brochure by contacting our team today.