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At okoHaus, we're experts in high performance window & door systems, and are proud to offer products from some of the most sustainable window and door companies on the market. 


We take pride in offering a full supply and install service, to both new build and refurbishment projects of all sizes. We can also support you to undertake your own installation of our products, providing the advice and ancillary products you need to complete your project to a high standard.


Focused in East Anglia, we only offer products we believe in and would use in our own homes.  All our products come from companies with a core focus on sustainability, not only in words, but actions as well.


Our products have market-leading performance and sustainability credentials and we take our environmental responsibilities seriously – aiming to be carbon neutral by 2025 or sooner.

okoHaus are approved distributors of Velfac, Rationel & Solarlux products. Together with our trained and manufacturer-certified installers, the okoHaus team take ownership of your project from first enquiry through to completion as well as dealing with any warranty issues along the way. We are professionals at taking the stress and complexity out of the specification and coordination of these high performance products.

Check out the links below to get started with finding the right solutions for your project.



Partners In Wildlife

As part of our commitment to environmental responsibility, we have committed to Partner In Wildlife status. Suffolk Wildlife Trust supports a number of projects local to us to improve biodiversity and encourage re-wilding. Through our partnership, we hope to aid them both physically and financially.


Sustainable and secure

Our Rationel windows and doors are not only sustainable, but are also exceptionally secure as standard.  All products achieve Building Regulations Approved Document Part Q as well as Secured by Design certification.

Tested to the extreme

Our Velfac windows and doors are market leaders in air, wind and water tightness. But don't just take our word for it; the full range has independent certification from 3rd party test houses.

93% fully recyclable

We make sure to choose products and suppliers who look after the environment. So you can rest assured that by choosing okoHaus products, we've done the research for you.

Durability, tested to the max

Full durability and cyclic testing is an important part of product development and factory quality control. We want your windows to stand the test of time and receive minimal call-backs, so nothing is left to chance.

Wind tested for the most severe locations

Our Rationel products are tested and certified to extremely high levels of wind resistance, giving you peace of mind that they are more than up to the job of keeping you cosy and warm when the weather turns nasty.

Installation detailing to match

When specifying high-performance window systems like ours, an equally high-performance installation system is well worth the investment. That's why we offer the Illbruck range of sealant and air tightness solutions.

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