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.

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.
Energy Efficient hup! Extensions
Get Your DesignsConservatories 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.
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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






