Expert Building Services in London – Extensions, Loft Conversions & More

At Guybar Building Contractors, we specialise in delivering top-quality building services across London. Whether it’s a seamless extension, a bespoke loft conversion, precise brick laying and repointing, or tailored fitted kitchen and bathroom installations, our skilled team brings your ideas to life with expert craftsmanship. We also offer professional landscaping, durable roofing, accurate plastering and rendering, and stylish paint & decorating services. From functional plumbing solutions to custom carpentry, ventilation systems, and patio construction, we cover every detail of your project. With years of experience and a commitment to excellence, we deliver results that add comfort, value, and character to your home.

Home Extensions That Seamlessly Expand Your Living Space

Need more room without the stress of relocating? Our custom extensions help homeowners across London gain functional space while enhancing their home’s layout. Whether you want to extend a kitchen, create an open-plan living area, or add new bedrooms, we’ll manage every step — from planning to completion. Combined with professional roofing, precise brick laying, and complementary landscaping, our extensions are built to last and blend beautifully with your existing property.

Loft Conversions That Add Space and Value

Turn your underused attic into a valuable part of your home with a smart loft conversion. We design and build functional spaces such as bedrooms, offices, or en-suites with structural precision and stylish finishes. Every conversion includes necessary insulation, flooring, stair access, and a professional touch of plastering, rendering, and paint & decorating. By integrating ventilation systems and ensuring energy efficiency, we guarantee comfort as well as added property value.

Kitchens, Bathrooms, Plumbing & More – Done to Perfection

Our London-based team offers full-service installation of fitted kitchens and bathrooms, supported by skilled plumbing and carpentry work. From minor updates to major refurbishments, we use durable materials and modern layouts to create spaces that look great and function perfectly. Whether it’s integrating a new layout, installing high-spec appliances, or managing all painting, plastering, and decorative finishes, we ensure everything is completed with care and professionalism.

Complete Home Transformations

From design through to build, we coordinate every element for a smooth, stress-free experience.

Quality Craftsmanship, Reliable Results

Our team delivers flawless execution, timely delivery, and exceptional attention to detail on every job.

Unlock Your Home’s Potential

Maximise your home with bespoke extensions, lofts, kitchens, and more — built around your lifestyle.