A glass link is a fully glazed corridor or passage connecting two separate structures — typically an existing historic building and a new extension or outbuilding. It is one of the most architecturally sensitive and planning-friendly approaches to extending heritage properties, because the transparent glass link creates a clear physical connection while maintaining a visible separation between old and new fabric.
Conservation officers and heritage bodies such as Historic England actively encourage glass link designs. The fully transparent structure allows the original building's character and detailing to remain visible and legible, while the contemporary glass construction makes no attempt to mimic or compete with the historic architecture. This honest approach to old-meets-new is now the accepted best practice for extending listed buildings, properties in conservation areas and historic estates across Surrey and the South East.
Our glass link structures use structural silicone bonding, minimal aluminium framing and high-performance double or triple glazed units to create lightweight, weathertight connections that require minimal intervention in the existing building fabric. Every glass link is a bespoke, architect-specified project — we produce AutoCAD detailed drawings and work closely with your architect, planning consultant and conservation officer to ensure the design meets all requirements.
Glass links are particularly valued in Surrey's historic market towns — Farnham, Guildford, Dorking, Reigate — where many properties sit within conservation areas or are individually listed. We also install glass links across London and the South East for projects ranging from residential garden connections to commercial building links in heritage settings.
For listed buildings, a glass link extension requires listed building consent (LBC) in addition to planning permission. Both applications can typically be submitted simultaneously, and we recommend engaging with your local planning authority at pre-application stage to establish the principle of a glass link before committing to detailed design work.
Within conservation areas, a glass link must respect the special architectural and historic character that led to the area's designation. Conservation officers may request adjustments to the link's position, scale, proportions or glazing specification to ensure it sits comfortably within its context. The inherent transparency of a glass link — and its clearly contemporary character — generally makes it more acceptable than solid-walled alternatives.
We have experience working within conservation area requirements and can advise on the appropriate design approach during your initial consultation. Where required, we can recommend heritage architects and planning consultants who specialise in listed building and conservation area applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Structure | Minimal aluminium frame with structural silicone bonded glass |
| Glass Walls | Double or triple glazed units, Low-E coated, argon filled |
| Glass Roof | Laminated inner pane (safety), self-cleaning outer coating |
| U-Value (Walls) | From 1.0 W/m²K |
| U-Value (Roof) | From 1.0 W/m²K |
| Typical Width | 1,200mm–3,000mm (project-specific) |
| Typical Length | 1,500mm–10,000mm+ (project-specific) |
| Floor | Typically stone, tile or engineered timber (by others) |
| Connections to Existing | Minimal fixings into existing fabric, discreet lead/zinc flashings |
| Drainage | Concealed aluminium gutter integrated into frame |
| Glass Type | Application | Benefit |
|---|---|---|
| Low-Iron (Optiwhite) | All glass link panels | Maximum transparency — no green tint to distort views of historic building |
| Solar Control | Roof panels, south-facing walls | Reduces solar gain in the narrow glass corridor |
| Self-Cleaning | Roof panels | Reduces maintenance on hard-to-access overhead glazing |
| Acoustic Laminated | Walls facing roads or public areas | Sound reduction for habitable link spaces |
| Anti-Reflective | All panels (optional) | Reduces glare and reflections, maximising visual connection |
All glass linkages are supplied with high-performance double-glazed or laminated sealed units as standard. Upgrade options include:
All our glass linkages are available with a choice of high-performance glazing to suit your project requirements:
We specify the optimal glass configuration for each project based on thermal performance, acoustic requirements and Building Regulations compliance.
Colours & Finishes
All aluminium frame and fixing components are powder coated to order. Standard colours available from stock:
Any RAL colour is available to special order, typically adding 2–3 weeks to lead time. For heritage projects, BS 4800 and NCS colours can also be matched.
Structural glass framing is typically specified in minimal finishes — mill-finish anodised, satin black or anthracite grey — to keep the focus on the glass itself.
Almost certainly, yes. Glass links connect separate structures and typically require planning permission. For listed buildings, listed building consent (LBC) is also required. We recommend pre-application discussions with your local planning authority to establish the principle before investing in detailed design work. We can advise on the process during your initial consultation.
Glass links are generally well-received by conservation officers because they create a clearly contemporary, transparent connection that does not mimic or compete with the historic building. The key principles are visual subordination, maximum transparency, minimal intervention in existing fabric and reversible construction. We have experience with conservation area applications across Surrey and London.
Yes. Our glass links are specified with double or triple glazed units achieving U-values from 1.0 W/m²K, making them suitable for year-round habitable use. Underfloor heating is the most common heating solution, as it avoids the need for radiators or wall-mounted units in the glass-walled space. Ventilation can be provided through openable panels or a discreet mechanical system.
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