About us


Oknowscy is a recognized market producer of the highest quality PVC and aluminum windows and doors. The owner of the OKNOWSCY brand is KIM Sp. z o.o.

We serve individual customers, development and investment companies in various markets. With years of experience, comprehensive management of domestic, European, and Asian projects, we offer high production standards and customized solutions: from measurement, production, transport (including customs clearance and the required EUR 1 documentation), to the installation of windows and doors. Distance does not limit us.

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Manufacturer of windows, PVC and ALU doors

with 8% VAT included for installation

We stand out for our:

  • Flexible approach to client requirements: personalized service for each order, tailored to needs.
  • Comprehensive support from measurements to installation – we handle both large and small investments/projects.
  • Technical consultancy.
  • Timely and complete execution, logistical efficiency, flexible approach.
  • Certified goods meeting safety standards: our products comply with the highest safety standards.
  • Quality guarantee.
  • Complete order service: from measurement, transport, installation to customs service with EUR 1 documentation.
  • 8% VAT on the purchase of products with installation service (applicable in Poland), in accordance with Article 41, paragraph 12 of the Act of March 11, 2004, on goods and services tax: i.e., Journal of Laws of 2023, item 1570, as amended.

Our window and door systems are innovative constructions that meet the latest safety and thermal insulation standards, available in a wide range of colors.


customer satisfaction


completed investments


installed windows


years of experience