Amazing Living Spaces
Finance Options Available
The better way to build
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Ultimate Design Flexibility
Being compatible with five different roofing options, including any door, window and wall designs, hup! extensions gives you total control over your extension from start to finish..
Five Times Faster Turnaround
We can complete extensions in significantly less time than conventional building methods. Allow your new home improvement project to benefit from hup!’s rapid connection technology.
Five Times More Energy Efficient
Benefit from lower energy bills and carbon footprints with the help of hup!’s innovative design. The material’s excellent levels of thermal retention will keep your Littlehampton or West Sussex home warmer and greener for years to come.
Simply Better Quality
Representing the highest level of engineering technology, hup! uses advanced design and manufacturing software and made-to-measure components for a perfect fit every time.
One Supplier, One Project
Gone are the days of stressful and messy installations. With hup!, your extension will be constructed in full by one dedicated team, so you won’t have to worry about multiple strangers or untidy use of your Littlehampton or West Sussex home.
60% More Carbon Efficient
hup! is 60% more carbon efficient than a brick wall with zero waste in production and no site waste to dispose of. Ongoing fuel consumption and carbon emissions are also lower than a brick wall, thanks to its superior thermal performance.
Energy Efficient hup! Extensions
Get Your DesignsEnjoy the benefits of the incredible thermal efficiency that hup! has to offer. Not only will you be able to enjoy a living space that is warm during the colder months, but you may also be able to enjoy lowered utility bills from not having to rely on your central heating as much. Make your home more comfortable with hup! today.
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Available Online, In-Store or At Home
Experience the freedom of obtaining the products you desire, tailored to your preferences. Our dedicated team is always available to assist you whenever you require assistance. Your satisfaction is our priority.
Online
Request a quote, use our digital designer or schedule a free one-to-one session with a design expert
Get a free online quote
In Store
Email us to learn more or to book an appointment to visit the showroom.
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At Home
Have our friendly design expert over to discuss your project, advise and take measurements for an on-the-spot quote.
Book a home visitExplore hup! in more detail
hup! technology explained
Featuring the latest technology in the Littlehampton and West Sussex home extension industry, hup! extensions are one of the most revolutionary systems on the market. Choose from our range of durable models and enjoy five times the energy efficiency and installation times than traditional extensions. Get in touch, and we can kickstart your hup! extension today.
hup! Conservatory Transformations
Transform and upgrade your old conservatory into a brand new stunning hup! extension for your home.
hup! Extensions
Boost the value and open up the space of your home with the help of our simple and fast hup! extension projects.
hup! Conservatories
Flood your home with stunning lighting and thermal insulation with a bespoke hup! conservatory.
hup! Garden Homes
Create a space where you can enjoy the exterior of your home with guests or alone with our stunning hup! garden homes.
Ultimate design flexibility
Interactive hup! Brochure
Happy Customers
Alison Lowe
Kayvex has replaced several windows in my home and fitted a new door. The service provided was fantastic.. all the staff were efficient, polite, professional and did a superb job. The cost was reasonable, and at all times, I was kept informed of the progress of the jobs undertaken. An excellent company to deal with.
Clare Taylor
I am very happy with my new porch door. It is very well made and has been fitted very well. It was a new fit rather than a replacement door. The fitters were extremely tidy, polite and conscientious. Leaving everywhere very tidy. They even bought their own hoover. The price was very reasonable compared with other quotes. No pushy salesman either. I would use it again as and when the need arises.
Julie
We had our patio door fitted yesterday and felt I needed to leave a review, as this experience was one of the best we have ever had. The price was fantastic, the salesman George was professional, efficient and not pushy at all. The surveyor was nice too; the fitters were brilliant, every appointment was precisely on time, the paperwork was emailed when they said it would be, and the payments required were staged, with the final payment due once fitted and happy.
The door is perfect; it was 6 weeks from start to finish despite being quoted 12 weeks (which we were happy with). I would not hesitate to recommend Kayvex to anyone, it all seemed a bit too good to be true quite honestly. Well done, Kayvex.
Helen Elliott-Adams
From Sales to the installation of our “Warm Roof”, we could not fault the service we received. Everyone we came into contact with was excellent. Nothing was too much trouble for our installation team. We would not hesitate to use Kayvex again or to recommend them.
Stephen Jordan
A neighbour recommended us Kayvex. From start to finish we received a very good service, John visited and offered very good advice on the products we required. Shelley and Tia were always available to answer any enquiries, and Wayne was also very informative when carrying out the survey, talking us through the fitting process and talking in detail about the products we were purchasing.
We had doors and windows fitted, and Paul and Brandon carried out the fitting. They arrived on time each day, were friendly in their approach, and carried out the fitting to a high standard whilst being respectful of our home with their tidiness.
We found all the members of the team friendly and knowledgeable and would recommend Kayvex to anyone having door and window home improvements.
