Contact Us

Expert Window Installation For
Your Home or Office in Grantham

Whether you are looking to give your home a new look or need to quickly replace a broken window, we have the solution for your home or office. 

Enjoy the security and quality of the work our window installation team does. We cover a 30-mile radius of Grantham, so affordable and effective glass solutions are just a call away. Get a free estimate today.

Contact Information

Address: Autumn Park Industrial Estate,
Grantham, Lincolnshire,
NG31 7EJ
Phone: (01476) 579058
Email: avantiwindows@live.co.uk

Operating hours

Monday-Friday: 8:30am – 4:30pm
Saturday: Closed
Sunday: Closed

Request a Quote









    Evie English
    Evie English
    Tony and the team were very professional throughout the whole process. The fitters had to install all new windows and doors and have completed to a high standard. They have been very accommodating with my timescales and would highly recommend. Thank you!
    Google
    Debbie Norton
    Debbie Norton
    A big thank you to Richard Tony and the team. Amazing service thoughout totally transformed our home! From the giles-norton family
    Google
    Draylynn
    Draylynn
    Our landlord got our old/rotten windows replaced by Avanti (Due to COVID there was a long wait for em). Friendly bunch, such a good job, clean seal work, no drafts, fitted well, cleaned up after themselves (indoor and out). Absolute 'massive' difference it's made in temperature and noise. Smashin' job, thanks Gaz and co'.
    Google
    Dawn Mantle
    Dawn Mantle
    Unfortunateley we had a bit of a wait to get our conservatory roof replaced due to the Covid 19 Pandemic. But Avanti have now managed to come and get the job done. The team were brilliant on the day, courteous, professional and worked safely within the Pandemic guidelines. My husband and I are delighted with the end result, it looks amazing. Thank You Avanti. Highly reccommended!
    Google
    Amanda Godber
    Amanda Godber
    Helpful professional service, done with an open and friendly approach and fair prices.
    Google
    Robert Edwards
    Robert Edwards
    Very high quality doors, no nonsense quote provided, no pushy sales process. Excellent fitting service by professional team, I would highly recommend this company to anyone.
    Google
    John Sheppard
    John Sheppard
    Fantastic company. Conscientious fitters, work completed to a high standard and the service from start to finish was excellent. Will be recommending to friends and family.
    Google
    Reviews