How to obtain a FENSA Certificate? Find out why it’s worth getting one.

Traditional houses in Chester, England

What is a FENSA certificate?


It is a document that every property owner in the UK must obtain when replacing windows. It guarantees that both the windows and their installation are of proper quality.

In this case it is worth choosing casement, sash, or tilt & turn windows. These styles are indicated by the FENSA organisation as the most popular designs in the UK. Their approval should be a mere formality. If you want to learn more about windows types, read our article: casement windows vs tilt & turn windows.


FENSA also guarantees compliance with:

  • British construction law
  •  thermal insulation requirements
  • up-to-date documentation in the public office

Please remember that investors who replace windows and doors need this certificate. It is not required when installing windows in new buildings.

Who can issue such a certificate?


There are two ways to apply for a certificate:

  • the first consists of an installation performed by a company accredited by FENSA
  • the second option is to obtain confirmation of correct installation at the nearest Building Control Department


According to, the easiest way to get a FENSA certificate is to have the installation carried out by a company that is an accredited FENSA fitter. Once the installation work is completed, the company responsible for the installation will confirm this work with FENSA.

This will allow you to easily find and order your certificate. You can do it via this link:

How do I get a FENSA certificate if the installation was performed by a company or person that is not listed by FENSA?


In the case where the installation was not performed by a FENSA-listed company, the easiest way to obtain a certificate is to ask for confirmation of installation compliance at the nearest Building Control Department.

A clerk will verify proper installation, tightness of the windows and their specifications. After receiving confirmation of the value of the windows in the form of an appropriate document, you will be able to obtain a FENSA certificate.

What is the cost of obtaining a certificate?


If the replacement has been reported to the public office and the installation was carried out by a FENSA-listed company, the cost of obtaining the certificate is only £25 (including VAT).

If the installation was performed by a company not listed by FENSA, the cost of obtaining this certificate is £ 180-260 for the official appraisement plus the cost of issuing the certificate, i.e. £25.

Why do you need a FENSA certificate?

FENSA certificates guarantee that the installed windows and doors are of proper quality and that the installation was carried out correctly. This document is particularly needed when selling a building. It will allow you to show that the windows have been replaced and to guarantee the new buyer that you have done everything in accordance with British building regulations.


about author

Michał Żółkiewski specialist responsible for customer experience.

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faq – who are we and what do we do?

1.What will I gain from working with you?

First of all, you’ll save your TIME. We will do the whole work with ordering doors, windows, gates, and blinds for you. Why should you outsource it to us? 
  • You will get products in a quality which was checked by us.
  • You don’t have to worry about meeting the deadline or financial condition of the supplier - we order the production only to verified companies.
  • We’ll find products that suit your needs - it doesn’t matter if that are windows, wooden or aluminum doors, PCV, blinds, or garage doors.
  • One complete transport at a lower price instead of a few different ones will come to the place of investment.
  • You’ll comfortably get everything done with one adviser, one invoice, one transfer, and only one place where you can (if necessary) make a complaint.

2. Does your company produce windows?

We aren’t just a traditional producer. We order the production of doors, windows, gates, and blinds inside of a network of selected and verified suppliers in terms of production punctuality, their financial condition, and the quality of products. We call ourselves the broker on a polish joinery market. We’ll do all of the arduous work with ordering the joinery from Poland for you. We’ll choose relevant products at an affordable price, organise safe transport and we’ll deliver the product to any address in the world. 

3. Do you have any stationary representatives in other countries?

We do not have any branches in other countries. Our office and a magazine are in Poland in Oleśnica (30 km from Wrocław).We overcome thousands of kilometers separating us from our clients owing to modern technologies. Thanks to that you’ll save your money and time because we don’t have to add any extra costs to the services or products to maintain expensive offices all over the world.

Delivery time, payment, installation, warranty

1. What is the delivery time on

The time of order processing is highly dependent on its specification. For example, white PCV windows, standard colors (anthracite on one side) can be ready for pick up or a shipment from 7 working days. The waiting time for nonstandard PCV colors is about 4 weeks depending on the color. The production time of PCV doors is also about 4 weeks. Aluminium doors and windows - from 3 weeks, wooden windows from 6 weeks. Furthermore, the blinds about 2 weeks, garage doors - about 3 weeks, metallic doors from 4 weeks. You’ll find estimated production time next to every product on its subpage.

2. How does the payment look like? Do I have to pay the whole amount immediately?

We suggest two forms of payment: 1. 50% of advance for production of the product and 50% shall be paid before picking up/ sending the goods. 2. 100% payment in advance. This form is much more favorable because we give you an additional 5% discount depending on the group of products.

3. Will I buy the joinery with an installation on

No, on we sell only windows, doors, blinds, and gates, which we deliver to every place in the world. The installation of the windows depends on the client. We do not offer installation service because our offer is not directed to the building companies, installers, developers, and realtors that can install the joinery by themselves.

4. If the windows would be installed by a different company, do the products keep the warranty?

Yes, the only condition is installing the product in accordance with the art of assembly and applicable standards in the country of the installation in terms of the warranty.

5. Do the products that I buy have a foreign warranty?

Yes, the only condition is installing the product in accordance with the art of assembly and applicable standards in the country of the installation in terms of the warranty.

How to obtain a FENSA Certificate? Find out why it’s worth getting one.

Want to know how much your business can gain by importing joinery from Poland?