Try Our Composite Door Designer & Pricing

About Us

Established in 1998, Window Mart have gone from strength to strength culminating in the opening of their show complex at Old Barn Garden Centre near Horsham. When Martyn Barker, MD started the Window Mart company he combined the knowledge he had acquired over 35 years working in the windows, doors and conservatories industry to establish a business run on the best working practices and highest standards of quality and finish.

All Window Mart staff are employed by the company and drive fully equipped company vehicles. We have our own building team for groundwork and brickwork. In our showroom an extensive range of conservatories, doors and windows can be viewed. Excellence is our commitment and we are here to make sure you get the very best in service and quality.

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Extensive range of traditional and modern styles.


We have a stunning range of Composite, Bi-fold & Patio Doors.


An endless choice – from Sun lounges, Victorian, Gable, Combination & Bespoke.


Orangeries blend the traditional elegance of classic styling.

All Seasons Rooms

Combine the feel of a conservatory, with the roof of an extension.

Garden Rooms

Add an extra room to your home with a custom built Garden Room.


Commercial projects for Housing, Apartments, Schools and Offices.

Energy Efficiency

‘A’ Rated Windows Reduce Fuel Bills, Condensation & Noise.

Garden Rooms

Built from Pod foundations with bespoke suspended steel insulation floors, tanalised pressure treated tumber, 80mm celotex insulation, breathable membrane, external cladding built with treated cedar and epdm one-piece roofs.

All windows and doors are pvc or aluminium energy A rated and high-security and all internals are plastered. LED lighting, sockets, armoured cable from your house and Part P certificate.

Also available is underfloor heating, laminate wood, floor tiles, decking, integral blinds etc.

Why Choose Us?

Price Match Guarantee

Our Price Match Guarantee means we will match any like for like quotation with the same features, specifications and warranties.

All Seasons Living

Combine the light and airy feel of a conservatory, yet with the solid, tiled roof, and energy efficiency of an extension.

Over 50 Front Doors

We have a wide range of over 50 white, coloured & woodgrained Front PVCu and Composite Doors to choose from. Starting from just £645.

FREE Quotation

Whatever your requirements, please contact us now for a comprehensive FREE no obligation quotation, or just for some friendly advice.

Best Price Promise GUARANTEE*

*Provide us with a Like for Like quotation with the same features, specifications and warranties from a comparable company,and we will match the PRICE.
Call us on Now 01403 711 936

Do you need a quote?

Contact us now for a comprehensive FREE no obligation quotation.