Passionately Breton
French expertise,
born in
the open air
At the very tip of Brittany, a stone's throw from the sea, beats the heart of Kostum. Every day, our 700 passionate craftspeople and joiners shape your gates, fences, railings and pergolas by hand. We design our aluminium creations to stand the test of time by your side: robust, repairable and guaranteed for 30 years. These are all the ingredients that allow us to create the backdrop for your sunny breakfasts, shared laughter and summer evenings.
Enter the Kostum workshops
Visualise your project
Our Kostum configurators allow you to simulate your gates, fences, pergolas, carports and railings projects in 3D. Choose your model, enter your dimensions, play with colours and add a photo of your exterior to see the result at home!
Configure my project
In safe hands
Have a project in mind? To guarantee your complete peace of mind, our gates, fences and outdoor fittings are installed exclusively by our network of partner installers.
Whether your idea is already clear or still taking shape, we connect you with the nearest Kostum installer. Model selection, technical constraints, precise measurements for bespoke manufacturing — they guide you every step of the way. Everything is taken care of, from the first quote to the final installation, with the assurance of 30 years of guaranteed quality.
Here's to happiness, family barbecues and lazy afternoons in the shade for many years to come!
Our story
Kostum is, first and foremost, a family story. It all began in 1973 with Ronan Cadiou. To this day, our teams craft every project by hand in the Maison Cadiou workshops, with the passion that comes from doing a job well. It is from this unique expertise that our Kostum brand was born, dedicated to creating your outdoor living spaces.
Today, his daughter Emmanuelle leads the way. Joined by her sons Mathis and Corentin, this third generation puts its heart into driving the company forward and imagining, with you, the joy of garden living.
Learn moreThey entrusted us with their project
Customer testimonials
We ordered outdoor guardrails for our terrace, top quality and finish, and French-made to boot!👍
38400nico
February 15, 2026
Very good quality product!
Anaëlle
February 9, 2026
Beautiful guardrails, very well installed.
C
February 7, 2026
The product inspires confidence with its high-quality assembly finish and the quality of the materials used in its manufacture.
arnaud
February 5, 2026
Timing was perfect despite the somewhat difficult weather conditions. Thank you
Bruno
February 5, 2026
Perfect installation and excellent product
Sandrine
February 3, 2026
Very high-quality product with a beautiful finish and robustness. I recommend it.
christophe
January 30, 2026
High-quality Kostum gate. Beautiful finish. Delighted.
Francois
January 29, 2026
Top-notch gate! Quality ++
Benjamin
January 28, 2026
Very good product. Easy to install and beautiful finish for a fair price. Well done.
fabrice
January 27, 2026
High-quality gate, exactly what I wanted.
M
January 21, 2026
Very good material with attractive aesthetics. Highly recommended
Gerard
January 20, 2026
High-quality product with an attractive finish.
Emmanuelle
January 6, 2026
Excellent product and easy to maintain
Dominique
January 3, 2026
Very good quality gates And very professional and efficient fitters (Luxe & Matic). We don't regret our choice!
Fabien
December 24, 2025