A smarter, greener way to extend your home. Factory-built, installed in days, up to 80% less disruption. Stunning design with superior thermal performance.
Call us anytime on 01243 538999 – David our digital assistant will take a few details so the right specialist can follow up personally.
Price From
£30,000
Build Time
2-4 Weeks on-site
Disruption Reduction
Up to 80%
Guarantee
10 Years
From £30,000
What is a Modular Glass Extension?
A modular glass extension is a revolutionary building system, proudly manufactured in the UK, that creates stunning, light-filled living spaces up to five times faster than traditional methods. Up to 60% more carbon efficient than a standard brick wall, with zero waste in production and minimal site water usage.
At Room Outside, our modular glass extensions are individually designed and pre-engineered. Patented wall panels made from a fusion of steel, timber, and super-insulation exceed Building Regulation standards. With slimmer profiles for more light and up to 15% extra floor space compared to brick build, your design feels brighter, smarter, and truly bespoke.
Precision engineering, factory quality, and dramatic reduction in on-site disruption.
Factory-Built Quality
80% of construction happens in a factory, not at your home. Systematic inspections, no weather delays, precision that site work can’t match.
Rapid Installation
On-site time: 2-4 weeks compared to 3-6 months for traditional builds. Module installation takes just 1-3 days.
Super-Insulated
Patented steel, timber and insulation panels exceed Building Regs. A++ thermal rating – warm in winter, cool in summer.
Bespoke Design
Individually designed with choice of roof options, window placements, and finishes – oak, aluminium, timber, or uPVC.
The Modular Difference
Less Hassle, More Enjoyment
No need to manage architects, builders, and multiple trades. Our team handles the entire process.
Style & Flexibility
Classic oak or aluminiumHardwood timber or uPVCSlimmer wall profiles
Function & Comfort
All-year usabilityLow energy billsBuilt on existing bases
Expert Guidance
No external architect neededListed building expertiseComplete project management
Expert Answers
Modular Glass Extension FAQs UK
Common questions about modular glass extension costs, timing and installation in the UK.
A modular glass extension typically costs from £30,000 to £80,000+ depending on size, specification, and complexity. Room Outside offers premium modular extensions from £30,000 fully installed with building control and 10‑year guarantee.
Total project timeline is typically 16-24 weeks from initial enquiry to completion. Design and planning (8-12 weeks), factory manufacturing (4-8 weeks), and on-site work (2-4 weeks). On-site disruption is reduced by up to 80% compared to traditional builds.
Yes. Our modular extensions feature patented wall panels with super-insulation, exceeding Building Regulations for thermal performance. They achieve A++ energy ratings and are comfortable year‑round.
Planning requirements are the same as for traditional extensions. Many fall under Permitted Development Rights, but restrictions apply in conservation areas and for listed buildings. Room Outside provides full planning guidance.
Yes. Thanks to the lightweight structure, modular extensions can often be built on existing conservatory bases, saving both time and cost. We assess suitability during the initial survey.
The on-site phase of a modular build is typically 2-4 weeks compared to 3-6 months for a traditional build. That’s around 80% less time with builders on your property. Because most construction happens in a factory, you avoid the ongoing dust, noise, and intrusion of traditional builds.
Get Your Free Modular Extension Quote
Book a free home design consultation with our specialist team. We’ll discuss your vision, assess access requirements and provide a detailed quotation.
Call us anytime on 01243 538999 – David our digital assistant will take a few details so the right specialist can follow up personally.
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Frequently Asked Questions
What is a modular extension?
A modular extension is a customizable, pre-fabricated structure that can be quickly installed to expand living spaces. These extensions are designed for energy efficiency and minimal disruption, providing homeowners with flexible and stylish solutions for their homes.
How much is a modular extension?
The cost of a modular extension varies based on size, design, and materials used. Typically, prices start from around £20,000, but for a precise quote tailored to your needs, we recommend contacting us directly.
What materials are used in modular extensions?
The materials used in modular extensions include high-quality, energy-efficient glass, durable aluminum frames, and sustainable insulation. These components ensure optimal performance, aesthetic appeal, and minimal environmental impact for your home extension.
How customizable are modular extensions for homes?
Modular extensions for homes are highly customizable, allowing homeowners to choose from various designs, layouts, and finishes that suit their personal style and functional needs. This flexibility ensures that each extension seamlessly integrates with the existing architecture.
What are the energy efficiency benefits of modular extensions?
The energy efficiency benefits of modular extensions include superior insulation, which reduces heating and cooling costs, and the use of sustainable materials that minimize environmental impact. This results in a comfortable living space while promoting energy savings for homeowners.
How long does installation of modular extensions take?
The installation of modular extensions typically takes only a few days to complete. This quick turnaround minimizes disruption to your home while providing you with an efficient and stylish living space.
What design options are available for modular extensions?
The design options available for modular extensions include a variety of styles, sizes, and configurations that can be customized to suit your home. Homeowners can choose from different glass types, frame colors, and layouts to create a unique living space that complements their existing architecture.
Are modular extensions suitable for all home types?
Modular extensions are suitable for a variety of home types. Their customizable design allows them to seamlessly integrate with different architectural styles, making them a versatile option for homeowners looking to enhance their living space.
What maintenance is required for modular extensions?
The maintenance required for modular extensions includes regular cleaning of glass surfaces, checking seals and joints for wear, and ensuring proper drainage to prevent water accumulation. This ensures longevity and optimal performance of your extension.
Can modular extensions increase home value?
Modular extensions can significantly increase home value. Their innovative design, energy efficiency, and customizable features make them attractive to potential buyers, enhancing both the aesthetic appeal and functionality of your home.
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