Trusted Construction Company in Lewes
Your local specialists in Home Extensions, Outside Buildings, and Roof Conversions throughout Lewes and the wider East Sussex area.
Your Leading Local Construction Company in Lewes
Monolith Construction is a trusted Lewes-based building company delivering extensions, outbuildings, and roof conversions across East Sussex. We manage every stage precisely — from early advice and planning through structural work to the final finishes — coordinating proven local trades for compliant workmanship, reliable scheduling, and a tidy, respectful service.
Clear, detailed estimates with no surprises down the line.
Proven local subcontractors managed to a well-planned schedule.
A respectful site and regular updates from start to finish.
Our Services
Home Extensions
Expand your living space with seamless, high-quality extensions.
Outside Buildings
Custom-built garden rooms, offices, and external structures.
Roof Conversions
Transform your loft with high-quality dormers and conversions.
Structural Alterations
Safe removal of walls, creation of openings, and structural support.
Kitchens
Design and installation of modern, functional kitchens.
Bathrooms
Elegant, relaxing bathrooms with high-quality finishes.
Ready for Your Extension or Renovation? Contact Our Lewes Builders
Ready to build your dream extension or undergo a full home renovation? We look forward to hearing about your plans.
Get A Free EstimateWhy Choose Us?
Fully Insured
Peace of mind with comprehensive coverage.
Transparent Pricing
Clear estimates with no hidden extras.
Strong Project Management
Structured planning and on-time delivery.