Luxury
Conservatories,
Orangeries & Glass
Extensions UK
Transform your home with bespoke conservatories, orangeries, & frameless glass extensions. Award-winning designs for homeowners across the UK.
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Limited availability for 2026 installations — Book your free design consultation today
Premium Glass Extensions
Bespoke Conservatories,
Orangeries & Glass Extensions
Each glass extension is individually designed by our expert designers.
From £25,000
Conservatories
Bespoke conservatories in timber, aluminium & UPVC. Victorian, Edwardian and contemporary styles crafted to complement your home’s architecture.
- Timber, Aluminium & UPVC options
- Victorian & Edwardian styles available
- Full planning permission support
From £35,000
Orangeries
The perfect blend of traditional architecture and modern comfort. Solid roof sections with stunning lantern features for year-round living.
- Lantern roof designs available
- Brick pillar construction options
- Superior thermal insulation
From £40,000
Glass Box Extensions
Minimalist frameless glass extensions that create a seamless connection between your home and garden. Stunning structural glazing.
- Frameless structural glazing
- Floor-to-ceiling glass panels
- Minimal frame design
Conservatory vs Orangery vs Glass Box
Not sure which glass extension is right for your home? Compare features, prices, and benefits to make an informed decision.
- ✓Period-style architecture
- ✓Maximum natural light
- ✓Multiple frame material choices
- ✓Lantern roof feature
- ✓Enhanced thermal performance
- ✓Brick pillar construction available
- ✓Seamless indoor-outdoor flow
- ✓Contemporary frameless design
- ✓Advanced structural glazing
Why UK Homeowners Trust Us
For over 50 years, Room Outside has been commissioned by discerning homeowners and senior figures across British business and public life. Our work is undertaken privately and discreetly — from former FTSE leadership and members of the House of Lords to projects specified for recognised national and international organisations. We focus on exceptional design, engineering quality, and historic commissions have included senior roles within the automotive, finance, and hospitality sectors — with details available on our Heritage, Discretion & Trust page.
Since 1973, we’ve been designing and building beautiful glass extensions for discerning homeowners across the UK.
Discover why clients recommend us.
New Generation Glass Technology
Our exclusive glass maintains perfect temperatures year-round—never too hot in summer or cold in winter. Enjoy your extension 365 days a year.
50+ Years of Expertise
Since 1973, we’ve perfected every aspect of design, manufacturing, and installation. Trusted by over 2,000 homeowners across the UK.
Bespoke Design Service
Every project starts with your vision. Our award-winning design partners create extensions that complement your home’s unique architecture.
10-Year Comprehensive Guarantee
Complete peace of mind with our industry-leading guarantee covering all materials, workmanship, and structural integrity.
Energy Efficient & Sustainable
Our extensions can be designed to reduce heating costs by up to 30% with superior insulation and environmentally responsible materials.
Family-Owned & Trusted
As a family business, we treat every client like family—with respect, transparency, and a commitment to exceeding expectations.
Luxury Conservatory & Glass Extensions for the UK’s Most Discerning Homeowners
Based in West Sussex, Room Outside works with homeowners across the South of England and beyond who care about quality, comfort, and considered design. With more than 50 years of experience, we’ve been trusted with everything from everyday family homes to landmark private properties. Whatever the scale of your project, our approach remains the same: discreet, bespoke, and focused on long-term enjoyment.
West Sussex
Our home county and where we have our deepest roots. We understand the local architecture, planning requirements, and unique character of West Sussex properties.
Hampshire
From the New Forest to Winchester, we’ve completed projects across this historic county, working with both traditional and contemporary property styles.
East Sussex
From coastal properties to homes in the South Downs, we bring our expertise to this beautiful county known for its natural landscapes and historic towns.
Kent
The Garden of England, where we work on everything from country estates to coastal homes, respecting both traditional Kentish architecture and modern designs.
Essex
From coastal towns to countryside villages, we work across Essex bringing our design expertise to both traditional and contemporary properties.
Surrey
With many projects completed across Surrey’s exclusive villages and towns, we understand the specific requirements of properties in this sought-after county.
Dorset
From the Jurassic Coast to inland villages, we’ve completed projects across Dorset, working with the unique architectural character of this beautiful county.
Berkshire
From royal connections to Thames-side properties, we understand the diverse architectural styles and planning considerations across Berkshire.
Greater London
Working across London’s diverse boroughs, we understand the unique challenges and opportunities of urban extensions in both period and modern properties.
Why the UK’s Discerning Homeowners Trust Room Outside
Discreet, bespoke service for properties of higher value
Absolute Discretion
NDA-protected service for high-profile clients. Our team is trained in the highest levels of client confidentiality.
Bespoke Design Excellence
Architect-led designs that enhance your property. We work with listed buildings, historic estates, and contemporary architectural masterpieces.
Premium Materials
We use only the world’s finest materials: Depending on the product choice, German-engineered aluminium, English oak, British manufactured New Generation Glass technology.
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Common Questions About Glass Extensions
Find answers to the most common questions about our conservatories, orangeries, and glass extensions.
The cost of a conservatory in the UK typically ranges from £25,000 to £60,000+, depending on size, style, glazing options, and location. A lean-to or Victorian-style conservatory usually starts around £25,000–£35,000, while larger orangeries and bespoke glass extensions can exceed £40,000. Prices vary based on materials, foundation requirements, and whether planning permission is needed.
The best conservatory company in the UK should offer quality craftsmanship, excellent customer reviews, strong guarantees, and bespoke design. Room Outside is consistently rated highly for our innovative glass extensions, use of New Generation Glass, and commitment to customer satisfaction across England, Scotland, and Wales.
In many cases, glass extensions and conservatories fall under Permitted Development rights in the UK, meaning planning permission is not required. However, rules differ in England, Scotland, Wales, and Northern Ireland, and restrictions apply for listed buildings or conservation areas. We always recommend a free planning check with our team.
Developed by Room Outside, New Generation Glass is an advanced glazing technology designed for better thermal efficiency and noise reduction. Unlike traditional conservatory glass, it helps maintain comfortable temperatures year-round—keeping spaces warm in winter and cool in summer—making it ideal for modern glass extensions in the UK climate.
Installation times vary depending on the project scope. Most standard conservatories take 6–10 weeks from groundwork to completion. Larger orangeries or complex glass extensions may require 10–14 weeks. Our project managers provide a clear timeline tailored to your property and local weather conditions.
Depending on your product choice and your location, we generally offer a 10-year structural guarantee on all our conservatories and glass extensions, alongside product-specific warranties on glazing, roofing, and materials. Our guarantees are backed by trusted UK insurers, giving you peace of mind for years to come.
Depending on your product choice and your location, we generally offer a comprehensive service which includes:
- Free home visit by one of our design experts
- Bespoke 3D visualisations showing how your extension will look
- Design drawing and specifications
- Planning permission guidance and support with applications
- Material samples including glass and frame finishes
- Comprehensive written quotation with transparent pricing
The consultation is completely free with no obligation, giving you the opportunity to explore all possibilities for your home.
Orangeries generally cost 20–40% more than traditional conservatories due to their brick-built bases, solid roofing sections, and architectural detailing. While a conservatory offers a lighter, more affordable extension, an orangery provides a more seamless blend with your existing home—ideal for those seeking a premium finish.
Room Outside stands out for our:
- Bespoke design service tailored to your home and lifestyle
- Use of New Generation Glass for year-round comfort
- Strong local reputation with projects across the UK
- Comprehensive guarantees and aftercare support
- Expertise in planning and building regulations specific to UK regions
We combine innovative glass technology with traditional craftsmanship to deliver stunning, durable extensions that add value and space to your home.
Modern glass extensions require minimal maintenance thanks to New Generation Glass technology and high-quality materials. Regular cleaning with a mild glass cleaner and occasional checks of seals and mechanisms are typically all that’s needed. Our glass extensions are designed for durability and require far less maintenance than traditional conservatories, saving you time and money in the long run.