We will Beat ANY like-for-like Window and Door Quotation!


Although LSM Builders have been supplying and installing high quality windows and doors since 2008, we have only ever offered this service as part of a larger building project whereby local authority building control would certify all installations. 

We are very excited to announce that we are now registered members of CERTASS and are able to self-certify all of our window and door instillation's  


To celebrate our CERTASS registration and to get our fitters off to a flying start, we are offering to beat ANY genuine like-for-like quotation for new or replacement windows and doors throughout April & May 2018

This offer applies to:




All the windows and doors that we supply come with a 10-year manufacturer guarantee as standard.

All our instillation's are LABC certified and come with a 10-year insurance backed warrantee for your complete peace of mind.

Send us your quotation and we will beat it!


Or arrange for one of our tradesmen to visit your home and provide our guaranteed lowest price quotation.

Fill in the form below to find out how much money we can save you:

Terms & Conditions of offer:

The quotation must be for a product that we are able to supply and must be of the same size, same design and same quality. Put simply, a "like for like" quotation. Should a quotation based on a like for like product be presented to us by a member of the public, then LSM Builders will provide you with a price that is lower.

Show your current quotation to one of our representatives during your appointment or send us a copy via our online form or email it to admin@lsmbuilders.co.uk

  • Offer is only available for customers in South Yorkshire

  • Include photocopies of the competing offer and specification of the competing product with your claim.

  • We can only accept one claim per customer per order.

  • We will then make a final decision on whether the competitor's product matches the features offered by us