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The Revolutionary Conservatory And Extension System

The Better Way To Build

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Complete Design Flexibility

hup! is compatible with five different roofing options and multiple door, window and wall designs, giving you complete control of the finished project.

Five Times Faster To Build

The groundbreaking hup! system allows us to complete a new conservatory or extension project in rapid time. You’ll be able to enjoy your conservatory sooner than you think when you use hup!

Five Times More Energy Efficient

Enjoy lower energy bills and reduce your carbon footprint with hup! The material has excellent thermal retention properties, helping to keep your home green.

Superior Quality

Our hup! extensions represent the highest level of building technology. The advanced designs, manufacturing software and made-to-measure components ensure a perfect fit every time.

One Supplier, One Project

Your new hup! extension can be constructed in full by a single dedicated team. There’s no need for dozens of strangers on your property or messy, stress-inducing installations and it’s far less hassle to build.

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60% More Carbon Efficient

hup! outperforms brick walls every time. hup! is 60% more carbon efficient than brick, generating zero waste in production and zero waste on site.

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Energy Efficient hup! Extensions

Get Your Designs

Conservatories and other extensions have a reputation for being hot and stuffy during the summer and uncomfortably cold in the winter. With hup! that’s no longer the case. The system is designed to make it far easier to achieve a comfortable household temperature and become usable all year long.

Get 3 FREE designs in 2 simple steps.

Find the perfect living space for your home with our user-friendly conservatory contact form. No matter what design you’re looking for, you can find the ideal designs for your home with our services.
Step 1

Select Your Favourite Designs

Select your favourite designs, send us a photo of the back of your home, and we’ll send you three personalised living spaces superimposed onto the pictures you send us.
Step 2

Choose Contact Method

We offer a variety of ways to get in touch with us for our living space designing services. Whether you prefer to message, email or call, you can choose the right method for you below.
Chat On WhatsApp
Request Callback
Submit Enquiry
Step 3

Enter Your Details

As you’ve selected to request a call or email, we’ll need some additional information from you to start the design process.
Final Step

Thank You! We’ll Be In Touch Shortly

Thank you for submitting your request. We look forward to working on your dream living space project with you.

What Happens Next?

Picking your favourite designs is just the start of your dream living space. Now that we’ve received your contact request and favourite designs, we’ll be in touch to assist you with our superimposed images. We look forward to hearing from you!

Why Choose Us?

Since 1982, we’ve developed a knack for high-quality work, with even higher quality customer service, so you’ll never need to worry when you’re with Britannia.

See Our Before & After

Want to see how we can transform your old conservatory? View our before and after photos here!
ISO 9001
Made in Britain
National Warranties
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Available Online, In-Store or At Home

Whether online, on-site or over the phone, our dedicated team is always available to assist you whenever you require assistance. Get complete support from the experts with Otter Windows.

Explore hup! in more detail

hup! technology explained

Being the latest breakthrough technology in the Devon home extension market, hup! is one of the most revolutionary systems available. You can select from our range of durable models and enjoy five times the energy efficiency of traditional builds. Get in touch, and let’s kickstart your hup! extension today.

hup! Conservatory Transformations

Upgrade and transform your existing conservatory into a stunning new hup! extension for your home.

hup! Extensions

Increase your living space and improve your kerb appeal in next to no time with our rapid hup! extensions.

hup! Conservatories

Design your own bespoke hup! Conservatory, get a great place to unwind and flood your home with natural light.

hup! Garden Homes

Create the perfect independent living space with hup! garden homes; freestanding structures for socialising and relaxation.

Ultimate design flexibility

Interactive hup! Brochure

Happy Customers

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