Greetings. Here at gslmasterbuild It’s our pleasure to get the job done and make sure all of our costumers are happy beyond completion. We come in and we get it all done for you. We always look after our clients even months later.


  1. Decking
  2. Driveways (Paved & Loose Surface)

About Building

With years of combined experience between us we can turn your dark unused loft spaces into a beautifully designed room or rooms, whatever your requirements we have the experience and expertise from initial surveyor, we will design, plan and construct your loft conversion, extension or garage to meet your individual needs, requirements and budget. All constructions are overseen by me to ensure smooth running. Don't worry because we don't use any sub-contractors for our building works our experienced team will do your job from start to finish because customer satisfaction is the top priority for us at GSL master build ltd.

Why use GSL master build ltd.

• GSL master build ltd have years combined experience between us in building be-spoke loft conversions, extensions, garages, roofing and general building.
• A business who cares, based in London.
• Complete managed service by us no sub-contractors used from our design survey through to completion – leave it to the GSL master build ltd experts.
• Fixed quote for your conversion or building works (no hidden fees).
• 10 year construction guarantee on all conversions.
• Our team of construction professionals to undertake every stage of your conversion.
• 100% Customer Satisfaction
• You have all the papers ready to start building? GSL master build ltd can start in few days anytime guaranteed.

We offer a broad range of services, including:

- Loft conversions
- Extensions
- Garage conversions
- Full Roofing including VELUX Windows / Skylights / Repairs.