A glass extension is an impactful and stunning addition to a house of any style, whether its a matching addition to a modern home, or a contrasting extension to a traditional property. Glazed extensions are also a perfect way of creating room while also flooding existing space with light, with the addition of bi fold doors and roof lights.

If you’re looking to add one of these stunning additions to your home, fill your home with light, or are simply looking for inspiration for your future project, get some ideas from this selection of incredible glass extension case studies.

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Related articles: The ultimate guide to extending your home | How to build the perfect glass extension | Planning and costing your single storey extension | 10 ways to cut the cost of your extension


Open aspect glass extension

To create an uninterrupted view of the garden from their East Sussex home, the Pollins family wanted to remove the boundaries between indoors and out.

Origin’s bi-fold doors were recommended for the large expanse of glass and modern architecture they wanted. Two sets allow the entire extension to open out, with the aluminium doors powder-coated in white to match the French Windows.

origin-open-aspect-glass-extensionA similar project would cost £30,000 to £35,000 for construction and materials


Two-storey glass extension

This County Armagh-based family asked Des Ewing Residential Architects to reorganise their home and open it up to the garden.

The result was a simple contemporary box-shaped extension, with two-storey windows and a double-height space giving it a dramatic look. Aluminium-framed glazing and zinc cladding keep it maintenance-free. A new kitchen-dining-living area leads out to a patio.

two-storey-glass-extensionA similar box extension would cost around £150,000


Slim frame glass extension

Architect John Onken was asked to transform the ground floor of a west London house by its owners, who wanted a simple yet elegant kitchen and dining space to complement the new kitchen cabinetry they had planned.

A frameless glass addition was designed to make use of the small patio garden, blurring the boundary between eating inside or alfresco. Black porcelain floor tiles contribute to the seamless connection, and the challenge of lighting the space at night was solved by positioning a light fitting at the edge of the space to throw light inward.

glass-extension-with-slim-frameA similar project would cost around £88,000 for materials and construction


Glass extension home office

Tasked with sensitively extending this traditional cottage in Esher, Surrey, by the couple who own it, IQ Glass had to make the new structure as minimal as possible.

A glass box-style design with supporting steel sections features painted glass bands in a light grey finish to match the existing palette. The new space now houses a home office, which sits perfectly on the corner of the property.

glass-extension-home-officeIncluding design, supply and installation of the glass box, the project cost £28,800


Streamlined glass extension

As part of a refurbishment, this north London family asked Lipton Plant Architects to create an open-plan space leading out to the garden of their home.

To obtain a level finish, the floor of the entrance room was lowered to meet that of the rear room. The depth of the floorplan meant as much light as possible was needed, so a glass box design lets daylight in, while creating better views of the garden through bi-fold doors.

glass-corner-extensionA similar project would cost around £3,000 per m²


Glass extension kitchen diner

Gregory Phillips Architects was tasked by the owners of this Wimbledon home to design a luxurious outdoor-feel space with electric blinds, underfloor heating and air conditioning.

Column-free and fully glazed, the space features Italian basalt flooring inside and out, with drainage positioned within slots, and double-glazed units with glass spacers for a seamless feel. A reflecting pool further blurs the boundaries.

A similar project would cost from £4,000 per m² for construction and materials


Glass extension to a listed building

The owners of this Grade II-listed north London property wanted to open up the lower-ground-floor kitchen and living area and extend into the garden, so asked Smerin Architects for a light-filled contemporary extension.

The local authority planners didn’t object to a glass-box-style new addition supplied by IQ Glass, and the back wall of the original house can be seen through the glazing.

glass-box-glass-extensionThis extension cost around £42,000, including all works above ground level


Glazed extension with a view

A single-storey and a double-height extension were designed for this family home in Leatherhead, Surrey, by Granit Architects.

A glass box was created at the point where the house changes orientation, and the extension runs parallel to the boundary. Glass articulates this pivot, introduces light, and creates a 180-degree view. A sliding pocket door can be drawn across the glass to make the space cosy in winter.

glass-extension-to-traditrional-homeA similar extension would cost from £2,500 per m² for construction and materials


Raised glass roof extension

Poor garden access and a dark kitchen led the owners of this Victorian home in Edinburgh to ask Zone Architects for a contemporary glass extension.

A glass-walled pavilion features a slender-edged floating roof to avoid a top-heavy appearance, with fully retractable glass doors on its southern aspect. It adds a light-filled kitchen-diner to the house, and continues the series of reception rooms that face the garden.

AT HOME - DICK PLACEA similar project would cost around £2,000 per m²


Rotated View

A single-storey and a double-height extension were designed for this family home in Leatherhead, Surrey, by Granit Architects.

A glass box was created at the point where the house changes orientation, and the extension runs parallel to the boundary. Glass articulates this pivot, introduces light,and creates a 180-degree view. A sliding pocket door canbe drawn across the glass to make the space cosy in winter.

rotated-glass-extensionA similar extension would cost from £2,500 per m² for construction and materials

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