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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Bespoke Conservatories, Orangeries & Glass Extensions
Each glass extension is individually designed by our expert designers, crafted to complement your home’s unique architecture and built to last a lifetime.
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
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
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
Planning Permission Quick Guide
Permitted Development
Most conservatories under 30m² don’t need planning permission if they meet building regulations. Read our full planning guide.
When You Need Permission
Listed buildings, conservation areas, or extensions exceeding 50% of your garden require formal approval before work begins.
Building Regulations
All glass extensions must meet Part L (thermal) and Part K (safety) building regulations as a minimum standard.
Typical Project Timeline
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 and engineering quality. Historic commissions have included senior roles within the automotive, finance, and hospitality sectors — with further details available on our Heritage, Discretion & Trust page.
Since 1973, designing and building beautiful glass extensions for discerning homeowners across the UK.
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.
Elegant Luxury Conservatories & Glass Extensions for Elite UK Homes
Based in West Sussex, Room Outside works with homeowners across the South of England and Greater London who care about quality, comfort, and considered design. Whatever the scale of your project, our approach remains the same: discreet, bespoke, and focused on long-term enjoyment.
West Sussex
Our home county. 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 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.
Kent
The Garden of England, where we work on everything from country estates to coastal homes, respecting both traditional and modern designs.
Essex
From coastal towns to countryside villages, we work across Essex bringing our design expertise to traditional and contemporary properties.
Surrey
With many projects completed across Surrey’s exclusive villages, 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 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 period and modern properties.
Why the UK’s Discerning Homeowners Trust Room Outside
Discreet, bespoke service for properties of higher value — delivered with the craftsmanship and care we’ve refined over five decades.
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
The world’s finest materials: German-engineered aluminium, English oak, and British-manufactured New Generation Glass technology.
Blog
Latest Advice and Inspiration
Conservatory vs Orangery vs Glass Box: Buyer’s Framework
Read More
Common Questions About Glass Extensions
Find clear answers to the questions homeowners most often ask about bespoke conservatories, orangeries, and luxury glass extensions in the UK.
Room Outside conservatories typically start from £25,000. Most bespoke conservatories, orangeries, and glass extensions range from £25,000 to £60,000+, depending on size, design, glazing specification, site conditions, and location.
The best conservatory company for your project should offer proven craftsmanship, clear guarantees, strong customer reviews, bespoke design, and practical planning guidance. Room Outside specialises in premium glass extensions, conservatories, and orangeries using New Generation Glass.
Many conservatories and glass extensions can fall under Permitted Development rights, provided they meet the relevant limits and conditions. Listed buildings, conservation areas, flats, maisonettes, and larger designs may need extra checks, so we recommend reviewing the project before work begins.
New Generation Glass is Room Outside’s advanced glazing specification, designed to improve thermal comfort, reduce glare, and support year-round use of conservatories, orangeries, and glass extensions.
Most standard conservatory installations take around 6 to 10 weeks once approvals, surveys, and manufacturing are complete. Larger or more complex orangeries and glass extensions can take around 10 to 14 weeks.
We generally offer a 10-year structural guarantee on conservatories and glass extensions, alongside product-specific warranties for glazing, roofing systems, frames, and other materials.
Our consultation can include:
- A home visit with a design specialist
- Bespoke design advice tailored to your property
- 3D visualisations, drawings, and specifications
- Planning guidance before the project moves forward
- Material samples and a written quotation
Orangeries usually cost more than traditional conservatories because they often include more brickwork, structural detailing, roof lanterns, and integrated building work. A typical orangery may cost around 20 to 40 percent more than a comparable conservatory.
Room Outside focuses on bespoke design, premium glazing, experienced installation, planning support, and long-term performance rather than off-the-shelf conservatory packages.
Modern glass extensions are designed to be low maintenance. Regular glass cleaning, gutter checks, and occasional inspection of seals and drainage channels usually keep the structure performing well.