Groundworks & Roofing in London
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Strong foundations. Secure roofs. Built to last.
At Bigness Group, we deliver professional groundworks and roofing services for residential and commercial properties across London.
From the groundwork beneath your building to the roof above it, our team ensures strength, stability, and long-term performance.
Whether you’re starting a new build, refurbishing a property, or repairing structural issues, we provide reliable, compliant, and high-quality services designed to protect your investment.
Our Groundworks Services
Foundations & Footings
Accurate excavation, reinforced concrete works, and foundation systems tailored to your building design.
Drainage & Soakaways
Installation of foul and surface water drainage, soakaways, manholes, and connection to existing services.
Site Excavation & Preparation
Strip-out, excavation, levelling, and site preparation for new builds, extensions, and multi-unit developments.
Basement Groundworks & Underpinning
Specialist underpinning, structural reinforcement, and ground stabilisation for basements and high-load structures.
Concrete Slabs & Ground Floors
Reinforced slabs, insulation layers, DPM membranes, and screed finishes prepared for construction above.
Our Roofing Services
New Roof Installation
Tiled, slate, flat roofing, and modern roofing systems installed for new builds and refurbishments.
Roof Repairs & Leak Detection
Fast, accurate repairs to prevent water damage, structural deterioration, and heat loss.
Flat Roofing Systems
EPDM, GRP fibreglass, torch-on felt, and warm roof systems designed for durability and energy performance.
Roof Replacement & Overhauls
Full strip-and-replace services including membrane upgrades, insulation, battens, and breathable layers.
Chimneys, Leadwork & Flashings
Repair and installation of chimneys, lead flashings, valleys, and weatherproof junctions.
Planning & Compliance
Groundworks and roofing must meet strict UK building standards.
We handle all compliance requirements, including:
- Structural engineering
- Drainage and utilities mapping
- Building regulations (Parts A, C, H & L)
- Waterproofing and damp protection
- Scaffold and access systems
- Health & safety management
- Roof structure inspections
- Fire safety and penetrations sealing
Every project is properly documented and delivered to the highest standards.
Our Process
Site Survey & Assessment
Understanding the ground conditions or roof condition.Planning & Engineering
Structural calculations, drainage design, and material selection.Excavation & Groundworks / Roof Preparation
Safe, controlled works with full compliance.Construction Phase
Foundations, drainage, roofing systems, membranes, and structural work.Finishing & Quality Control
Testing, waterproofing checks, insulation, and final inspection.Handover
Certification, warranties, and maintenance guidance.
Why Choose Bigness Group
Expert groundworks and roofing teams
Structural, drainage, and roofing specialists in-house
Transparent pricing with detailed breakdowns
Premium materials and durable systems
Strong focus on safety and compliance
Reliable, fast, well-coordinated project delivery
Suitable for new builds, refurbishments, and commercial sites
We build from the ground up — and protect everything above.
FAQ – Groundworks & Roofing
Q: How long do groundworks usually take?
A: Depending on project size, typically 1–6 weeks.
Q: Can you repair leaking roofs?
A: Yes — we provide rapid leak investigation and permanent repairs.
Q: Do I need planning permission?
A: Structural changes, major excavation, or roof extensions may require it. Repairs usually don’t.
Q: Do you work on commercial buildings?
A: Absolutely — we handle both residential and commercial sites.
Our Recent Groundworks & Roofing Projects in London
See examples of foundation works, drainage installations, flat roof systems, tile roofs, and full structural upgrades delivered across London.
Custom Homes & Luxury Houses in London by Borough
We provide Custom Homes & Luxury Houses across all London boroughs — ensuring full Building Control compliance and tailored design for local site conditions. Every borough comes with its own planning rules — we navigate them efficiently to make your project seamless.
Barking and Dagenham / Barnet / Bexley / Brent / Bromley / Camden / Croydon / Ealing / Enfield / Greenwich / Hackney / Hammersmith and Fulham / Haringey / Harrow / Havering / Hillingdon / Hounslow / Islington / Kensington and Chelsea / Kingston upon Thames / Lambeth / Lewisham / Merton / Newham / Redbridge / Richmond upon Thames / Southwark / Sutton / Tower Hamlets / Waltham Forest / Wandsworth / Westminster
Practical thinking for better-managed buildings.
Guidance, technical insight and practical perspectives on compliance, maintenance, building performance and long-term improvement.
