Home Blog How to obtain a replacement FENSA certificate

How to obtain a replacement FENSA certificate


When buying or selling a property that has had replacement windows or doors installed since July 2002, you will need to provide the seller or purchaser with a FENSA certificate.

Not having this important legal document can hold up the sale of the property, so do please make sure that if you have had (or are planning to have) any replacement windows or doors installed in your home that you receive a FENSA certificate within 3-6 weeks after the work is carried out and you’ve paid in full, if not, check online at www.fensa.org.uk that your double glazing installer did register the work they carried out on your property.

The fastest way you can obtain a replacement or duplicate FENSA certificate for windows and doors installed in your home after July 2002 is via their website, simply click on “FENSA Certificate” on the home page which brings up a window asking for your property’s postcode. Put in your property’s postcode, and, as long as your double glazing installer registered your installation at the time they carried our the work or shortly afterwards, this should bring up your address, the number of windows and doors installed that need to be registered, and if you have it, your FENSA ID number.

Please note FENSA certificates are not required for conservatories, external porch doors where there is an existing inner front door and garage side doors, as they are only needed for window and door replacement works to the original exterior of your home. 

Simply then fill in the details and pay £25 fee per certificate (if it has not increased) by credit card or debit card. FENSA will then send you a replacement certificate in about 3-4 weeks. Having contacted FENSA, their representative recommends that re-ordering a FENSA certificate online is often much much quicker and less expensive than asking your Solicitor to do this for you as Solicitors a) tend to send a cheque by post which needs to clear before certificate is sent out, plus b) they will no doubt charge you for the privilege!

Double glazing manufacturers and installers do not issue FENSA certificates, nor get sent them, so consequently do not have copies of them as these are issued directly by FENSA to each retail windows and doors customer. You can contact FENSA “direct” on 020 7645 3700 if you have any queries. Also, please note that if you don’t buy online, FENSA charge you £30 for a replacement certificate if you want to pay by cheque.

Alternatively you can write to FENSA with a cheque and all the necessary details at 40 Rushworth Street, London SE1 0RB. You can check that Hazlemere Window Company Ltd (or indeed any installer) are members of FENSA by going onto the FENSA website, which will confirm that Bucks based Hazlemere Windows and Doors registration number as 10589. Hazlemere Windows, Doors and Conservatories are also Which? Trusted Traders and members of the Glass and Glazing Federation.


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Credit is subject to status and affordability. Terms and conditions apply. Finance on windows & doors is available to a maximum loan value of £50,000 with zero deposit. Finance on conservatories is available to a maximum loan value of £30,000 with a 15% deposit. £1,000 minimum order value applies to all finance options. Authorised and regulated by the Financial Conduct Authority. Hazlemere Window Company Limited at Cressex Business Park, Wellington Road, High Wycombe, Buckinghamshire HP12 3PR (Financial Services Registered No. 796507) is a credit broker and is authorised and regulated by the Financial Conduct Authority. Credit provided by Hitachi Personal Finance, a trading style of Hitachi Capital (UK) PLC, authorised and regulated by the Financial Conduct Authority (Registered No. 704348).