3-Bed House
Expert craftsmanship was applied to ensure the longevity of each upgrade, enhancing both functionality and aesthetics while maintaining the integrity of the property.
Transform your property with trusted builders London specialists. From loft conversions to complete refurbishments, our expert team delivers exceptional results across all boroughs. With over 12 years as construction contractors London, we bring your vision to life with precision and quality.
As an experienced construction company, GSM Builders has built a strong reputation for delivering compliant, high-quality projects across the capital for over 12 years. We operate as a full-service building construction company in London, managing projects from initial consultation through to completion with absolute transparency and care.
Our team includes qualified project managers, site supervisors, skilled tradespeople, and specialist partners such as quantity surveyors and structural engineers. Every project is delivered in line with Building Control requirements, local planning authorities, and the Party Wall Act where applicable.
We proudly follow industry best practices and work in accordance with standards set by Federation of Master Builders, Health and Safety Executive, and London Building Control. Our 12+ years of experience spans residential refurbishments, new builds, commercial developments, and structural alterations making us a reliable construction company clients trust for quality and accountability.
+44(0)208 077 2121
We stand out from other construction companies across London because we care about doing the job right. By using traditional ways and modern ideas, we deliver strong and lasting results. We keep things clear and simple and always put your needs first to make sure you are happy with the final work.
With 12+ years of experience, GSM Builders deliver quality, reliability, and professionalism you can trust. We bring your vision to life with care and expertise.
Project Completed
Our team brings extensive expertise across all areas of construction. From loft conversions and renovations to roofing and painting, we combine technical skill.
Projects in Hand
Client satisfaction is our top priority. We take pride in delivering quality workmanship, clear communication, and dependable service from start to finish. Our many repeat clients and positive reviews reflect the trust we've earned by consistently exceeding expectations. Your peace of mind is our success.
Happy Clients
As construction contractors, we provide end-to-end building solutions tailored to homeowners, landlords, and businesses. Our construction company services cover both modern and traditional construction methods, delivered by experienced general builders.
Our expert team is here to help. Whether you need a home extension, renovation, or full build, we offer reliable services. Contact us now for a free no-obligation quote and let us bring your vision to life.
We are available 24/7 to answer your questions.
GSM Builders provide professional construction services across, supporting homeowners and businesses with reliable, high-quality building solutions. As trusted builders in London, our experienced team delivers extensions, refurbishments, renovations, and new build projects with a strong focus on workmanship, clear communication, and dependable service.
With a strong local presence, we respond quickly, manage projects efficiently, and ensure all work meets local planning and building control requirements. Wherever your project is based, you can rely on our team to deliver consistent results from start to finish.
We proudly serve multiple locations across London, with dedicated teams available in the areas listed below.
Discover our wide variety of innovative projects, showcasing creativity, expertise, and solutions for various industries and challenges.
Expert craftsmanship was applied to ensure the longevity of each upgrade, enhancing both functionality and aesthetics while maintaining the integrity of the property.
We transformed this studio apartment into a stylish and efficient living space, featuring a functional layout and sleek design.
We upgraded this 4-bed villa with spacious, luxurious interiors, featuring premium finishes and smart home technology for ultimate convenience.
Modern urban renovation with open-plan design, smart layout, and luxury interior finish.
Over 12 years, GSM Builders has completed 1,120+ projects with 890+ satisfied clients. Read genuine reviews from homeowners and businesses who chose us as their trusted builders.
GSM Builders delivered our refurbishment on time and within budget. Their professionalism as construction contractors really showed throughout the project.
As a full-service construction company London, we offer new builds, extensions, loft conversions, renovations, and refurbishments. Our general construction contractors handle kitchen fitting, roofing, plastering, electrical work, and plumbing for residential and commercial projects .
Timelines vary by project scope. Our professional builders London typically complete kitchens in 2-4 weeks, loft conversions in 6-8 weeks, and extensions in 8-12 weeks. As experienced building contractors London UK, we provide accurate schedules during consultation and deliver projects on time.
Yes. Our building construction company London provides 12-month warranties on all work, with extended coverage for structural projects. As licensed builders London with 12+ years experience, we're fully insured and registered with Federation of Master Builders, guaranteeing quality on every project.
Prepare your budget (with 10-15% contingency), determine planning permission needs, and gather property documents. Our construction contractors London handle council liaisons and Building Control. Ensure site access and inform neighbors. Contact us for a free consultation and project checklist.
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