Window & Door Installers London | About Window Fitters Ltd

About Window Fitters Ltd: Experienced London & Surrey Glaziers

Established in 2016 (Company Registration No. 10415531), Window Fitters Ltd has grown to become one of London and Surrey's most trusted glazing contractors. From our head office in Croydon, we serve developers, commercial main contractors, and residential clients across London, Surrey, and surrounding areas (within a 40-mile radius). Our directly employed fitting teams bring Over 10 years of experience in the glazing trade, enabling us to deliver durable double and triple glazing installations, high-volume B2B subcontracting, fire door compliance, and precise commercial glazing repairs.

Who We Are

We are a dedicated team of professional glazing installers and technical surveyors who believe that every property deserves secure, energy-efficient, and beautifully finished windows and doors. We have built our reputation on high-quality workmanship, transparent pricing, and direct accountability.

Unlike many glazing firms that rely on third-party subcontractors to meet high demand, we operate a strict direct-employment policy. Every window fitter, commercial installer, and surveyor on our team is directly employed by Window Fitters Ltd. This guarantees absolute control over workmanship quality, site safety compliance, and professional standards. Every operative holds relevant CSCS cards, undergoes background verification, and is trained in current CDM 2015 safety requirements.

For our B2B commercial clients, this means reliable and consistent labour on site, seamless integration with your project timelines, and full compliance with JCT subcontract requirements and site-specific RAMS. We are fully equipped to manage commercial glazing contracts in central London locations including Westminster, Bayswater, Queensway W2, City of London, and Croydon.

Our Core Services & Operational Models

Every home and commercial renovation is unique, which is why we support two clear routes for procurement and fitting:

• Supply and Fit contracts: This is our complete, stress-free glazing package. Our team manages the entire project lifecycle. We take exact millimetre-perfect measurements during our technical site survey, source top-quality A-rated frames and safety glass from leading UK manufacturers at exclusive trade discounts, handle the delivery, and complete the professional installation. This is the ideal option for clients wanting single-point accountability and maximum convenience.
• Installation Only services: If you prefer to source your own window profiles, bifold doors, or specialised glass units, you can hire us solely for our expert labour. Learn more on our installation services page. Our glazing team will unload, position, fit, align, and weather-seal your pre-purchased products. This route offers excellent flexibility for developers working with specific manufacturers or homeowners who have already bought their fixtures independently.

Strict Compliance & Building Control Coordination

A beautiful window is only as good as its compliance with local regulations. We ensure all our replacement projects conform to the latest UK Building Regulations:

• Document L (Conservation of Fuel and Power): Installing A-rated double glazing and high-performance triple glazing that keeps heat in, achieving U-values of 1.4 W/mK or lower.
• Document K (Protection from Falling, Collision and Impact): Ensuring safety toughened glass is fitted in all critical locations, such as doors and adjacent side panels.
• Document F (Ventilation): Providing background ventilation, including trickle vents, to prevent dampness and maintain indoor air quality.

We do not hold FENSA registration, which means we do not issue self-certification certificates. Instead, we work directly with local authority building control departments. We organise the necessary site inspections and submit documentation, ensuring your installation is fully certified, legally registered, and compliant with local council records. We are also committed to sustainability; when replacing old windows, we ensure materials are sorted and recycled in line with our Green Building Practices.

Our Sourcing & Quality Guarantee

We believe in passing value directly to our clients. Over the years, we have established strong relationships with the UK's leading glazing fabricators. This allows us to source premium materials (including modern uPVC, slimline aluminium, and composite entrance doors - see our comparison guides for a side-by-side look at different frame materials) at discounted trade rates. We pass these savings directly to you, providing premium quality without the premium price markup.

To support this, all of our glazing contracts are covered by £5,000,000 Commercial Public Liability Insurance and £10,000,000 Employers' Liability Insurance, protecting your home or commercial site throughout the project. This covers both residential fittings and complex commercial glazing contracts (such as structural curtain wall installations and facade fittings). We also offer trade supply options for local builders and form long-term partnerships with developers who require a reliable subcontractor for larger housing projects.

Whether you require a minor repair for a misty glass unit or a complete window replacement for a large-scale renovation, Window Fitters Ltd is ready to assist. Contact our Croydon team today to discuss your project requirements or book a site survey.