LOCAL BUILDERS · WINDSOR
Your Local Construction Specialists in Windsor
As trusted builders in Windsor, we provide expert building services with a strong focus on quality, reliability, and customer satisfaction.
Whether you’re planning a home extension, full renovation, or a new build, our experienced team is here to deliver outstanding results on time and within budget. We use premium materials and strictly follow all local building regulations to ensure durable, compliant, and long-lasting outcomes.
Choose GSM Builders for professional building services in Windsor, personalised to meet the needs of both residential and commercial projects.
12-month workmanship warranty
Written into every contract
Building Control certified
Completion certificate on every project
Fully insured
Public & employer’s liability
Based in Hayes UB3
Building in West London since 2019
WHAT WE DO IN WINDSOR
Building services in Windsor
Extensions, lofts and full refurbishments are most of our work. We also take on smaller jobs on their own.
House Extensions Loft Conversions Refurbishment Renovation Kitchen Fitting Flooring Painting & Decorating Plastering & Skimming Roofing Wall Tiling Wallpaper Removal Emergency Services All services →
Your Project. Our Passion. Delivered.
Ready to start your project? Contact GSM Builders for trusted quality and expert service.
Quality services built to last.
As the best builders in Windsor, we offer a comprehensive range of construction services for residential, commercial, and industrial projects.
Reliable Building Services in Windsor
At GSM Builders, we bring years of expertise to every residential, commercial, and industrial project in Windsor. Our skilled team manages each phase of construction with precision, from design coordination to the final handover.
Whether you’re expanding your home, modernising your space, or starting a new build, we deliver results that reflect your goals and exceed expectations. With a strong reputation for quality and accountability, we’re proud to be Windsor’s trusted choice for tailored building solutions.
Why Choose GSM Builders in Windsor?
Choosing the right builder is key to a successful construction project and GSM Builders is proud to be one of the most trusted builders in Windsor.
With a highly skilled and experienced team, we bring years of hands-on expertise to every residential, commercial, and industrial build. Our focus on quality craftsmanship, attention to detail, and reliable project delivery sets us apart in the Windsor area.
Whether you’re planning a home extension, renovation, or complete new build, you can count on us for expert advice, transparent communication, and lasting results. We also specialise in roofing, painting and decoration, flooring, and loft conversions, delivering high-quality workmanship across every aspect of your project.
Get a written quote
Tell us about your project in Windsor and we’ll come out, measure up and send an itemised price. Usually within a week.
GSM Builders Ltd
13 Leven Way, Hayes UB3 2SR
Mon to Sat 8am, 6pm
HOW WE WORK
One team, start to certificate
01
Free site survey
We measure, check drains and planning, and give you an itemised written quote.
02
Drawings & approvals
Plans, structural calculations, planning or prior approval, Party Wall notices where needed.
03
The build
A dedicated site manager, agreed payment stages, and the house kept liveable.
04
Sign-off
Building Control completion certificate, snagging, 12-month workmanship warranty.
FAQ
Common questions
What types of construction projects do you handle?
We handle a wide range of projects including home extensions, renovations, new builds, loft conversions, roofing, flooring, and painting & decorating for both residential and commercial properties.
Do you offer free quotes for building work in Windsor?
Yes, we offer free, no-obligation quotes. Our team will assess your project needs and provide a detailed estimate with transparent pricing.
Are your builders fully qualified and insured?
Absolutely. All our builders are fully qualified, experienced, and insured to ensure your project is completed safely and to the highest standards.
How long does a typical home extension or renovation take?
The timeline depends on the size and complexity of the project, but most extensions or renovations are completed within a few weeks to a few months. We always keep you informed at every stage.
NEARBY
Also building in these areas
Hayes Hillingdon Uxbridge Ruislip Southall Greenford Ealing Acton Hounslow Harrow West Drayton Harmondsworth Sipson Iver All areas →
Ready to talk about your project in Windsor?
Free site visits anywhere in West London. Written quotes within a week.