Trusted Construction Company in Lewes

Q: Do you work across Lewes and East Sussex?

Yes. We are based in Lewes and serve the wider East Sussex area.

Q: Can you help with planning applications?

Yes. We advise on permitted development and submit planning applications when needed.

Q: How quickly can you start a project in Lewes?

Lead times vary by scope; typical starts are within 2–6 weeks after agreement.

Q: Do you offer free estimates?

Yes. We provide free, no-obligation estimates with a site visit.

Your local specialists in Home Extensions, Outside Buildings, and Roof Conversions throughout Lewes and the wider East Sussex area.

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Welcome to Monolith Construction

Your Leading Local Construction Company in Lewes

Monolith Construction is a trusted Lewes-based building company delivering extensions, outside buildings, and roof conversions across East Sussex. We manage each stage precisely, from early advice and planning to structural work and final finishes.

Our team coordinates proven local subcontractors to guarantee compliant workmanship, reliable scheduling, and tidy, respectful service tailored to your property and lifestyle.

Transparent pricing and detailed local estimates
Coordinated trades with clear programmes
Tidy site management and consistent communication

See What Our Lewes Clients Say

Colin is intelligent, personable, honest, straight forward and very hardworking. He is a skilled builder, solution finder and manager of people. During the six months that I spent working closely with him, he led the construction of our fantastic extension, building relationships with all involved parties — neighbours, architects, tradespeople, building control officers and many others.

Grace Gordon Sun Street, Lewes

Colin is intelligent, personable, honest, straight forward and very hardworking. He is a skilled builder, solution finder and manager of people.

Pete Bull Lewes

I’d wholeheartedly recommend Colin. He did some major work on our house. He kept to budget and kept us completely involved with progress. He has a great team and we couldn’t have wished for a more hassle-free piece of work or a better result.

Mark Stobbs & Richard Beaton Nevil Estate, Lewes

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.

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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.

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Why 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.

Monolith Construction FAQs in Lewes

Do you work across Lewes and East Sussex?

Can you help with planning applications?

How quickly can you start a project in Lewes?

Do you offer free estimates?