Home extensions
Rear, side-return, wrap-around and double-storey extensions designed around your property.
Explore services →Local construction services
Builders in Mitcham, Tooting & Thornton Heath
Builders serving Mitcham, Tooting and Thornton Heath for extensions, lofts, renovations, kitchens, bathrooms and complete design-and-build services.
Building in your area
Designed carefully. Managed clearly. Built properly.
SEM Group supports homeowners across Mitcham, Tooting and Thornton Heath who need to create more space or improve the way their property works. We undertake extensions, loft conversions, structural alterations, refurbishment, kitchens and bathrooms.
Where space is limited, good planning matters. Our design-and-build approach connects layout decisions, structural requirements, building services and the final interior so the finished space is practical as well as well built.
Arrange a consultation →Services available
Complete support for your project.
Choose an individual building service or ask SEM Group to coordinate the complete design-and-build journey.
Loft conversions
Dormer, rooflight and hip-to-gable conversions with structural and staircase coordination.
Explore services →Renovations
Complete refurbishments, structural alterations and interior transformations.
Explore services →Kitchens & bathrooms
Design, supply and professional fitting with all associated building services.
Explore services →New builds
Managed construction from pre-start planning through to completion and handover.
Explore services →Design & technical
Architectural drawings, planning, structural calculations, Party Wall support and Building Control.
Explore services →Locations covered by this team
Mitcham · Tooting · Thornton Heath
Planning a project in one of these locations? Tell us about the property, the work you have in mind and your preferred timescale. We will help you understand the most practical next step.
Discuss your project →Have a project in mind?
Let’s build something
exceptional.
Tell us about your property and plans. We’ll arrange a complimentary, no-obligation consultation.
Start your project →Or email info@semgroup.uk