Luxury
Conservatories,
Orangeries & Glass
Extensions UK
Transform your home with bespoke conservatories, orangeries, and frameless glass extensions. Award-winning designs from West Sussex, serving homeowners across the South of England.
Premium Glass Extensions
Bespoke Conservatories,
Orangeries & Glass Extensions
Each glass extension is individually designed and hand-crafted in our West Sussex workshop. We use our patented New Generation Glass technology to ensure perfect year-round comfort.
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
Since 1974, 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 1974, we’ve perfected every aspect of design, manufacturing, and installation. Trusted by over 1,000 homeowners across the UK.
Bespoke Design Service
Every project starts with your vision. Our award-winning designers 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 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 Extension Installations for the UK’s Most Affluent Homeowners
Based in West Sussex, Room Outside exclusively serves the UK’s wealthiest homeowners across the South’s most exclusive locations. With over 50 years of experience, we’ve transformed properties for billionaires, royalty, celebrities, and business leaders. Our team provides discreet, bespoke service for the most discerning clients, with complimentary consultations that respect your privacy and security requirements.
Surrey
Home to 16 billionaire residents and the highest average property prices outside London. Average house prices exceed £2 million in these exclusive locations.
London
The world’s premier billionaire destinations, with properties regularly selling for £50-£100 million. Home to international royalty and business magnates.
Berkshire
Home to royal palaces and Europe’s most expensive racing communities. Average household incomes exceed £150,000 in these exclusive locations.
Buckinghamshire
The most affluent part of the Chilterns, with some of the UK’s highest-paid commuters. Average property prices exceed £1.5 million in these locations.
Hampshire
Historic wealth centers with properties regularly exceeding £3 million. Home to the highest concentration of millionaires outside London and Surrey.
Oxfordshire
Home to academic royalty, tech billionaires, and publishing magnates. Average household wealth exceeds £2 million in these exclusive locations.
Kent
The wealthiest parts of the Garden of England, with properties regularly selling for £3-5 million. Home to City bankers and international executives.
Dorset
The fourth most expensive place to live in the world. Sandbanks has the highest land value per square foot outside central London.
West Sussex
Home to some of England’s most expensive country estates and historic properties. Average property prices exceed £1.2 million in these exclusive locations.
Why the UK’s Wealthiest Homeowners Trust Room Outside
Discreet, bespoke service for properties valued from £2 million to £100+ million
Absolute Discretion
NDA-protected service for high-profile clients, celebrities, and billionaires. Our team is trained in the highest levels of client confidentiality.
Bespoke Design Excellence
Architect-led designs that enhance multi-million pound properties. We work with listed buildings, historic estates, and contemporary architectural masterpieces.
Premium Materials
We use only the world’s finest materials: German-engineered glass, British oak, and Italian hardware. New Generation Glass technology with 10-year guarantee.
Blog
Latest Advice and Inspiration
London Luxury Glass Extensions: Urban Space Solutions for Premium Properties
Read More
The Room Outside Process: From Initial Design to Final Handover
Read MoreCommon 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 £10,000 to £40,000+, depending on size, style, glazing options, and location. A lean-to or Victorian-style conservatory usually starts around £10,000–£20,000, 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.
New Generation Glass is an advanced glazing technology designed for better thermal efficiency, noise reduction, and security. 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 2–4 weeks from groundwork to completion. Larger orangeries or complex glass extensions may require 4–6 weeks. Our project managers provide a clear timeline tailored to your property and local weather conditions.
We 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.
Yes, we provide flexible finance options to help spread the cost of your glass extension. Options include interest-free credit and tailored payment plans, making it easier to invest in your home without upfront financial pressure.
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.