Business Details
18 Years
experience
Your Trusted Window & Door Supplier in Doncaster
Established over 17 years ago by Mark and Ray, The Great Big Window has built an unrivalled reputation for reliability and craftsmanship in Yorkshire. Our expertise lies in supplying and installing high-quality uPVC, composite, and aluminium windows and doors, tailored to meet individual customer needs. We prioritise transparency, offering no-pressure consultations and fixed pricing with no hidden fees. Backed by a 10-year guarantee and Certass accreditation, our work complies with all building regulations, ensuring peace of mind. With a 5-star Google rating and 10/10 Checkatrade score, we combine decades of industry experience with a commitment to exceptional customer service.Our team of seasoned professionals delivers bespoke solutions, from energy-efficient glazing to secure entrance systems, serving Doncaster, Barnsley, Sheffield, Leeds, and surrounding areas. We source premium materials without compromising affordability, rejecting substandard alternatives. Our philosophy centres on long-term relationships, evidenced by rigorous quality checks and a dedication to exceeding client expectations through meticulous installation and aftercare.
Services
uPVC Windows
Composite Doors
Aluminium Bifolds
Window Replacements
Door Installations
Details
- Year established: 2008
Highlights and features
- 17 years of expertise in uPVC home improvements across Yorkshire
- No-pressure sales approach with transparent pricing
- 5-star Google rating and 10/10 Checkatrade score
- Certass-registered installations ensuring regulatory compliance
- 10-year product guarantees with public liability insurance
Associations and certifications
- Certass Association
What people say
5-star rating
Top quality products
Exceptional customer service
10/10 Checkatrade score
Reliable installations
Services
uPVC Windows
Durable uPVC windows designed for energy efficiency and low maintenance. Available in casement, flush sash, and sliding sash styles with modern security features. Customisable to match property aesthetics while providing excellent insulation and noise reduction.
Composite Doors
Solid-core composite doors combining security and style. Engineered hardwood cores with weather-resistant skins ensure longevity. Available in traditional or contemporary designs to enhance property entrances while maintaining thermal efficiency.
Aluminium Bifolds
Aluminium bifolding doors maximising natural light and outdoor access. Slim profiles allow expansive glass panelling while maintaining structural integrity. Ideal for modernising living spaces with seamless indoor-outdoor transitions.
Window Replacements
Full or partial window replacements using energy-efficient glazing units. Expert installation ensures improved thermal performance and security. Includes replacement of existing uPVC window components while maintaining frame integrity where possible.
Door Installations
Professional installation of uPVC, composite, and aluminium doors. Comprehensive service covering measurement, supply, and secure fitting. Includes hardware upgrades and weatherproofing to ensure long-term functionality and aesthetic appeal.
People
Mark
Co-Owner
Co-founder with over 17 years' industry experience. Prioritises customer satisfaction through honest advice and quality craftsmanship. Committed to maintaining high installation standards and business integrity.
Ray
Co-Owner
Co-founder bringing extensive technical expertise in window and door systems. Focuses on product quality and installation excellence. Advocates for transparent pricing and long-term customer relationships built on trust.
Questions
What areas do you cover?
We serve Doncaster, Barnsley, Sheffield, Leeds, Scunthorpe, Wakefield, and all East, West, and South Yorkshire regions.
Are your installations certified?
All work is Certass-registered, ensuring compliance with UK building regulations and eligibility for manufacturer warranties.
Do you offer guarantees?
Yes, we provide a 10-year product guarantee and public liability insurance coverage for all installations.
What types of windows do you supply?
We offer uPVC casement, flush sash, and sliding sash windows with energy-efficient glazing options.
How do you handle consultations?
We provide free, no-obligation consultations with transparent pricing and no pressure to commit immediately.
What door options are available?
We supply composite, uPVC, and aluminium doors including bifolds, French doors, and single entrance systems.
