20+ Years Experience
Specialist Glass Extensions
Looking for glass extension installers in Cardiff? We design, supply and install bespoke glass extensions, glass box extensions and contemporary glass rooms for residential properties throughout Cardiff and the surrounding areas.
Our glass extension specialists manage projects from initial design and specification through to supply and installation. Whether you want to extend a kitchen, create a new dining area or add a modern glass room overlooking your garden, we can design the extension around your property, available space and budget.
We install structural glass extensions for modern and traditional properties, with options including frameless glazing, sliding glass doors, glass roofs and bespoke configurations.
We are proud to have been recognised as a Top-Rated Glass Room Extension Experts in the United Kingdom.
Contact our team today to discuss your proposed glass extension in Cardiff and request a free, no-obligation quotation.
We provide bespoke glass extension design and installation services throughout Cardiff. Our team can create anything from a compact glazed extension to a larger structural glass room designed around your existing property.
Each project starts with your requirements. We consider the size of the proposed extension, property style, glazing specification, access, intended use and budget before recommending a suitable design.
Our glass extension services can include:
Contact our Cardiff glass extension team with your plans or project requirements to receive a tailored quotation.
Our experienced glass extension specialists design and install bespoke glazed structures for homeowners throughout Cardiff.
We focus on creating extensions that complement the existing property while providing the additional floor space, natural light and garden connection the homeowner wants.
Customers choose our team because we can provide:
Every property presents different design opportunities and practical requirements. We therefore plan each extension individually rather than relying on a standard design.
Whether you want a modern addition to a period property or a contemporary extension for a newer home, our team can develop a solution around the existing building.
Our glass extension specialists have practical experience designing and installing structural glazing systems for residential properties.
We understand the importance of accurate specification and professional installation because large glazed structures need to perform as part of the wider building.
Speak to our team about the experience, qualifications and accreditations relevant to your specific glass extension project.
Glass extension prices in Cardiff can vary considerably, but an indicative cost for planning, materials and installation may be around £1,500 to £3,000 per square metre.
This should only be used as an initial guide. The final glass extension cost depends on the design, glazing specification, structural requirements and work required at your property.
Factors that can affect glass extension prices include:
A simple glazed extension will generally cost less than a large bespoke structural glass installation with specialist glazing, complex steelwork and large sliding doors.
For an accurate glass extension price in Cardiff, contact our team with your approximate dimensions, photographs, architectural drawings or proposed design.
A glass box extension uses large areas of structural glazing to create additional living space while maintaining a strong visual connection between the property and the outside area.
Glass box extensions are particularly popular at the rear of residential properties because large glazed elevations can provide extensive garden views and bring more daylight into adjoining rooms.
A bespoke glass box extension can include:
The exact specification depends on the property, proposed design and intended use of the new room.
Every glass extension we install can be designed around the architecture and layout of the existing property.
The design stage considers more than appearance. The orientation of the building, available floor area, structural requirements, privacy, access, glazing performance and intended use of the extension can all influence the final specification.
For contemporary homes, you may prefer large uninterrupted glass panels and minimal framing. For traditional or period properties, a contrasting modern glass structure can provide additional space while keeping the original building visually distinct.
Our team can discuss different configurations and help you identify a solution that suits your property and budget.
A professionally designed glass extension can transform how you use the rear or side of your property because it combines additional internal space with extensive glazing.
Potential benefits include:
Large glazed elevations allow daylight to enter the extension and can also increase the amount of natural light reaching adjoining areas of the property.
A glass extension creates extra internal floor space that can be used as a kitchen, dining room, living area, home office or multifunctional family space.
Floor-to-ceiling glazing can provide uninterrupted views across the garden. Sliding doors can further connect the extension with an outside patio, terrace or landscaped area.
Structural glazing can create clean architectural lines and a contemporary appearance. This can work with both modern buildings and older properties where a clearly defined modern addition is preferred.
We design modern glass extensions in South Glamorgan for homeowners who want additional space without creating a conventional brick extension.
A contemporary glass extension can incorporate structural glazing, minimal frames, aluminium supports, large sliding doors, glass roofs and other architectural features.
Possible designs include:
The best configuration depends on your property and how you want to use the additional space.
Frameless glass extensions use minimal visible framing to create a cleaner transition between the interior and exterior of the property.
Depending on the structural design, large glass panels can be combined with discreet supporting components to reduce visual obstruction.
Frameless glazing is particularly suited to projects where garden views and natural light are priorities.
Contact our team if you are considering a frameless glass extension in Cardiff and want to discuss suitable design options.
A glass kitchen extension can increase the usable area of an existing kitchen while introducing significantly more daylight.
Depending on the property, the additional space could accommodate a larger kitchen layout, dining area, island or open-plan living space.
Large sliding doors are also commonly incorporated into kitchen extensions because they provide direct access to the garden and can open a substantial section of the external elevation.
Glass room extensions provide additional enclosed living space with large glazed walls or roof sections.
The room can be designed for a range of uses, including dining, entertaining, relaxing or working from home.
Unlike an off-the-shelf garden room, a bespoke glass extension can be designed as an integrated part of the property and tailored to the dimensions of the existing building.
We manage glass extension projects through a structured design and installation process.
Contact us with your property location, approximate extension dimensions, preferred design and budget.
We review the property and proposed extension to establish the design, structural and installation requirements.
A suitable design can then be developed around your property, intended use and preferred architectural style.
We establish the required glazing, structural components, doors and other features before providing a quotation for the proposed work.
Required groundwork, foundations and structural preparation are completed according to the project specification.
Our installers construct the extension and install the required structural glazing, frames, doors and associated components.
The finished extension is checked against the agreed specification before project completion.
A glass extension does not automatically require planning permission. Some residential extensions can fall within permitted development rights, while others require a planning application.
Whether permitted development applies depends on factors such as the property’s location, extension dimensions, previous alterations and planning restrictions affecting the building.
Listed buildings, properties in conservation areas and homes subject to specific planning restrictions may have additional requirements.
You should establish the planning position for your individual property before construction begins. Our team can discuss the requirements relevant to your proposed glass extension in Cardiff.
Planning permission and Building Regulations are separate considerations. A project that does not require planning permission may still need to comply with applicable Building Regulations.
Requirements can cover areas including structural stability, thermal performance, glazing, ventilation, foundations, drainage and fire safety.
The amount and performance of glazing may also affect the thermal calculations required for the project. Highly glazed extensions can therefore require additional assessment to demonstrate suitable energy performance.
The exact requirements depend on the design and property, so each project should be assessed individually.
Glass extension costs can vary significantly according to size, glazing specification, structural requirements and design complexity. An indicative starting range for some projects may be around £1,500 to £3,000 per square metre, but a bespoke quotation is required for an accurate price.
Many glass extensions require suitable foundations or structural groundworks because the extension needs to transfer loads safely into the ground.
The foundation specification depends on the structure, ground conditions and design of the extension. Any required foundation work will also affect the overall project cost.
A glass extension is typically designed as an integrated extension of the existing internal living space, while a traditional conservatory is often treated as a more distinct room attached to the property.
Glass extensions can also use structural glazing and architectural systems that create a more contemporary appearance than a conventional conservatory.
A bespoke structural glass extension can cost more than a straightforward brick extension because large specialist glass panels, structural components and installation requirements can increase material and construction costs.
The final comparison depends on the specification of both options. A heavily glazed brick extension with premium doors, rooflights and specialist windows may have a substantially different cost from a basic masonry extension.
Not always. A glass box extension may fall within permitted development rights if it meets the applicable requirements. Larger extensions, listed buildings, restricted properties and certain locations may require planning permission.
Check the requirements for your property before beginning construction.
Yes. Glass extensions can work particularly well with older properties because a contemporary glazed structure can create a clear distinction between the original architecture and the new addition.
The design still needs to consider the character, structure and planning status of the existing building.
A properly specified glass extension can be designed for year-round use. Thermal performance depends on the glazing, framing, insulation, heating, orientation and overall building design.
Yes. Sliding glass doors are commonly incorporated into glass extensions because they can provide wide garden openings while maintaining extensive glazing when closed.
Yes. Glass roof sections and rooflights can be incorporated into suitable extension designs. The structural and thermal specification needs to account for the size and position of the roof glazing.
The timescale depends on the size and complexity of the extension, planning requirements, structural work, glazing lead times and site conditions. We can provide a more accurate programme once the project specification has been established.
Glass extensions need to comply with the requirements applicable to the individual construction project.
Requirements vary between properties, so the planning and technical position should be established for each individual project.
We work closely with homeowners to create glass extensions that suit both the property and the intended use of the new space.
Every project is different. The dimensions, glazing specification, architectural style, doors, roof design and structural requirements can all be tailored to the property.
If you are considering a glass extension in Cardiff, contact our team with your ideas, photographs, plans or approximate dimensions. We can discuss the options available and provide a quotation based on your requirements.
We provide glass extension design and installation services throughout Cardiff, Wales and surrounding areas.
Our team can help with glass box extensions, structural glazing, glass rooms, contemporary extensions and other bespoke residential glazing projects.
Some of the towns we cover near Cardiff include:
Grangetown, Cathays, Canton, Fairwater, PenarthIf your town is not listed, contact us because we may still provide glass extension installation services in your area.
We absolutely love the service provided. Their approach is really friendly but professional. We went out to five different companies and found Glass Extensions to be value for money and their service was by far the best. Thank you for your really awesome work, we will definitely be returning!
Ashley PrestonWe have used Glass Extensions for many years as they are certainly the best in the UK. The attention to detail and professional setup is what makes this company our go-to company for all our work. I highly recommend the team for the immense work - we highly recommend them!
Mike LorenPlanning a glass extension in Cardiff? Contact our specialists today for a free, no-obligation quotation.
Tell us what you want to build and provide your approximate dimensions, photographs or architectural plans where available. We can review your requirements and discuss a suitable glass extension design for your property.
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