Grantham's centre for quality conservatories

Professional, friendly service - every time
At our site in Grantham, we offer a range of conservatories to suit every taste. A conservatory adds light and space and our low maintenance UPVC designs are backed by our lifetime guarantee. Choose from a classic Edwardian, Victorian, or lean-to design. We provide a total package of design, build and install to your specification, budget and timeframe. 
We also provide a range of sky lanterns, or sky lights, available in a choice of artisan colours and supplied with either polycarbonate, low e-toughened, self cleaning clear, or self cleaning blue tint glass. We take pride in getting a beautiful job done right the first time around.


The team at Avanti Windows understands the value of installing conservatories. You can rely on our Grantham team to install your new conservatory in the quickest time possible, with the maximum respect for your home.

Helpful & resourceful

At Avanti Windows our team in Grantham enjoys their work and ensures our customers are happy with their new conservatories or glass work. 
We can also take care of all necessary planning permission and building regulations for the installation of your new conservatory with your local authority in your area.
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Windows and conservatories in Grantham
A member of an experienced glass and conservatories team in Grantham

Guttering and roofing options

A range of finishing options are available including: 
  • Variety of roof finishes including glass and polycarbonate.
  • Artisan colour options.
  • Fully glazed designs with glass from floor to roofline or combinations with various dwarf wall heights
  • Decorative glass options to fanlights or sides
  • Electrics and plumbing available
  • Exterior building work including pathways and drainage solutions

For a free quote call: 01476 579058

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