Specification, supply and installation of premium windows, doors and curtain walling for new builds, conversions and commercial projects across the North West.
AGG Developments is the trade and commercial arm of the AGG Group. We partner with developers, contractors and housing associations to deliver glazing packages that meet programme, budget and performance requirements — without compromise.
We work with architects, specifiers and project managers from the earliest stages — advising on product selection, U-values, acoustic ratings and Building Regulations compliance to ensure your glazing package is right first time.
Access to the full range of REHAU, Reynaers and RK Door Systems products. From standard PVCu windows to high-performance aluminium curtain walling, we source and procure at scale with competitive developer pricing.
FENSA-registered installation teams experienced in working on live construction sites. We coordinate with main contractors to meet programme deadlines without compromising quality or safety standards.
A dedicated project manager for every development. Phased deliveries, snagging schedules and aftercare — all managed with clear communication and a single point of contact from start to handover.
From city-centre apartment schemes in Liverpool to rural barn conversions in Cheshire and coastal developments across North Wales — our installation teams cover the full North West region and beyond.
With over 25 years of experience working on developments of every scale, we understand the pressures of construction programmes and the importance of reliable, on-time delivery.
For Residential Property Developers
For residential property developers, the glazing package is a critical lever for adding premium market value and ensuring site efficiency. At AGG Group, we act as the principal contractor, providing a singular point of accountability for both high-end building work and technical glazing installation. We understand that your priorities centre on protecting margins, ensuring repeatability across plots, and meeting rigorous building regulations without compromising on the architectural “wow factor”. By engaging us early, you secure a dependable partner who manages the technical complexities of oversized systems and site logistics, allowing you to focus on the broader commercial success of your development.
While we are unique in our ability to act as a principal contractor and deliver your whole project end-to-end, we are also happy to operate as a specialist supplier and installer for single glazing packages.
We offer a full-service project management programme that extends far beyond standard glazing supply. By managing structural preparations and final installation, we reduce your management overhead and ensure a consistent standard of luxury quality across the entire building envelope.
All our systems are regularly updated to meet or exceed the latest requirements of Document L (Thermal Performance) and Document Q (Security). We are FENSA-registered and Secured by Design-certified, providing the authoritative documentation you need for project sign-off and buyer reassurance.
Lead times typically range from 4 to 16 weeks, depending on the specification, and we provide a clear project schedule with a critical path to avoid on-site delays. To ensure efficiency, we include specialist plant hire — such as spider cranes or vacuum lifters — within our initial quotes, preventing unexpected costs or disputes over site responsibility.
Yes. We provide a 10-year warranty across all products as standard across the majority of our range, with the option to extend this to 15 years via our dedicated care plan. This care plan, which includes annual maintenance and servicing, acts as a significant differentiator and value-add for your prospective buyers.
Speak with one of our directors about your next development →
You will never deal with a call centre or an untrained representative. Our director is personally involved in all technical queries, providing a level of engagement that is rare in the industry. Whether you are an architect, designer, or developer, you will speak directly with experts who understand the structural and aesthetic nuances of your project.
Call 0151 428 3244 to discuss your project directly with our technical team →
As official partners for industry-leading brands such as Reynaers Aluminium and RK Door Systems, we provide high-specification solutions designed for longevity and performance. Our Full Project Management service ensures that technical requirements are standardised across your development, protecting your margins by eliminating mid-build design changes and structural errors.
Email your site plans for a preliminary glazing specification →
Absolutely. With over 25 years of local expertise, we provide a comprehensive service that covers the entire building envelope. By acting as a single, dependable partner for both the build and the glazing, we streamline your project's critical path and ensure the finish meets the highest architectural standards.
For developers seeking “invisible” transitions, we recommend our slim-frame sliding doors and minimalist aluminium profiles. These systems are engineered to maximise natural light while maintaining the structural integrity required for oversized openings. We also provide bespoke internal steel partitions to maintain a high-end aesthetic flow throughout the property.
Precision is our baseline. We establish datum points during our technical survey to verify aperture accuracy. For high-impact elements like our XL pivot doors, we manage the entire logistics process, including the use of laser measuring devices to ensure a surgical fit.
Yes. Many of our premium ranges, including Rehau Artivo and Masterline 10, are engineered to meet the most stringent thermal performance requirements. We can advise on the best glass specifications to ensure your project exceeds the latest building regulations.
Contact us for a detailed technical consultation on high-performance glazing →
Through our partnerships with Glyngary Timber and Roseview, we offer bespoke timber and uPVC sash windows that perfectly replicate heritage aesthetics while providing modern draught-proof performance and security. This allows developers to maintain the character of a period property without compromising on modern luxury standards.
Call 0151 428 3244 to discuss your specific heritage requirements →
Whether you're a homeowner, architect or developer — let's discuss how we can bring your vision to life.
