From the best idea to the living experience – competent advice and detailed planning

Your order to us sends a clear message: innovative architecture. We develop an idea to suit you – and only you. We provide extensive advice and support to ensure that you receive a product which is tailored perfectly to your needs and wishes. From the inspiration via the presentation of possibilities, 3D visualisation, layout and product solutions to the finished living experience.


Some customers know exactly what they want. Others are inspired by photos of other projects which help them to define their style and design specifications more clearly. Check out the Gallery on our website and also on the individual product pages for photographs of a few among many projects we have completed around the world.

You can also find our current catalogue in the “Download” menu. We shall be happy to send you our image brochure as well. We design and build exclusive home conservatories and window systems which are designed specifically for your property and your lifestyle.

We recommend to visit our exhibition or one of the KELLER Partners in your area to experience the design, execution, quality and fittings at first hand.


With us, your building project is in experienced hands from start to end.




Advice & quote

Your personal contact will support you right from the start. We want to give you optimum advice and support so that you get the home conservatory, window or sun-protection system that you actually need. Technical structural circumstances, the site and your personal requirements and expectations are all covered in the consultation. Your project is then developed based wholly on your specifications and preferences. In the first implementation phase, suitable materials are selected, lighting concepts are developed and construction methods are optimised. Once all the details have been finalised and all parameters selected, we produce your personal quote. Our designers produce photo-realistic 3D renderings of your building project.

Order, dimensioning, detailed planning

Once every aspect for the new acquisition has been agreed, your project becomes an order. Our technical office receives all the information and starts the fine detailing. This includes measurements on site and finalising details with the architects and builders. Next come the technical development of the production and assembly plans.




After the technical development and production of detailed building plans, the factory receives the production order. In a state-of-the-art machine park, 5-axis CNC machines deliver ultra-precise production results. The experience and expertise of our employees ensure the perfect progression of the building project. To guarantee quality control, all constructions are assembled in the production halls in TROISVIERGES (L) before they are fitted in situ – customer satisfaction is the key factor at all times.




Without question, prompt completion of all project stages is a priority. Once the factory production is complete, all components are carefully labelled and packed. Assembly is performed by our own fitters (or – depending on the country – by our trained business partners). Uniform assembly standards guarantee expert implementation of the construction project. Only minute attention to detail in processing and installation guarantees long-term, effortless functionality.

Final inspection and transfer

After completion, our site manager performs the final inspection. Each element is checked and each control is tested. Transfer, with the corresponding warranty certificate, takes place when all functions are operating smoothly.



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