Structural Steel & Reinforced Concrete Works in London
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Strong structures. Precise engineering. Built for long-term performance.
Structural integrity is the foundation of every successful construction project.
At Bigness Group, we specialise in delivering structural steelworks, reinforced concrete (RC) works, and load-bearing structural solutions for residential, commercial, and industrial buildings across London.
From steel frames and concrete slabs to retaining walls, underpinning, and full structural alterations, our team ensures that every element is engineered, installed, and certified to the highest standards.
Our Structural Steel Services
Steel Beams (RSJs), Columns & Frames
Manufacture, supply, and installation of steel beams, box sections, and full load-bearing steel frames.
Structural Alterations & Open-Plan Conversions
Removal of load-bearing walls, installation of steel lintels, goalposts, cranked beams, and portal frames to create open spaces.
Balconies, Staircases & Platforms
Custom steel fabrication for external access, mezzanines, balconies, and stair structures.
Welding & On-Site Fabrication
Fully certified welders delivering MIG/TIG welding, steel adjustments, and on-site fabrication.
Steel Reinforcement for Concrete Works
Rebar, mesh systems, cages, and structural reinforcement prepared for RC pours.
Our Reinforced Concrete (RC) Services
Concrete Foundations & Footings
Strip foundations, trench fill, and reinforced footings tailored to engineering specifications.
RC Slabs, Ground Floors & Upper Floors
High-strength slabs with insulation layers, rebar, mesh and formwork for residential and commercial use.
Retaining Walls & Structural Concrete
RC retaining walls, basement walls, lift pits, and high-load service structures.
Underpinning & Ground Stabilisation
Traditional underpinning, mass pour, beam & base systems, and full ground reinforcement for subsidence or extensions.
Formwork & Shuttering
Precision-built formwork systems for beams, columns, slabs, and architectural concrete.
Planning, Engineering & Compliance
Structural steel and reinforced concrete require strict compliance with engineering and UK building regulations.
We handle:
- Structural engineering drawings & calculations
- Temporary works design
- Method statements & risk assessments
- Load testing and certification
- Fire protection of steel elements
- Building control approvals
- Concrete testing & curing supervision
- CDM compliance and site safety
Every structure we build is engineered for safety, longevity, and full regulatory approval.
Our Structural Build Process
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Site Survey & Structural Analysis
Assessing existing conditions, loads, ground levels, access, and constraints. -
Engineering Design & Detailing
Structural drawings, steel schedules, rebar plans, and temporary works. -
Fabrication & Pre-Construction
Steel prefabrication, rebar cages, formwork, and preparation of works. -
On-Site Installation
Steel erection, RC formwork, reinforcement installation, and concrete pours. -
Testing, Protection & Finishing
Load tests, fire protection, corrosion coating, and finishing works. -
Certification & Handover
Engineer’s certificate, building control sign-off, and all compliance documentation.
Why Choose Bigness Group
- Experienced structural steel & RC teams
- Precision installation with full engineer oversight
- Strong track record in both residential & commercial projects
- Access to high-quality fabrication facilities
- Transparent programming and cost control
- Fully compliant with UK building regulations
- Perfect integration with our new-build and refurbishment divisions
We build the structures that everything else depends on.
FAQ – Structural Steel & RC Works
Q: Do you provide structural engineering calculations?
A: Yes — full structural design and stamped calculations.
Q: Can you remove load-bearing walls?
A: Absolutely — including RSJ installation, padstones, goalpost frames, and steelwork.
Q: Do you handle basements and underpinning?
A: Yes — we deliver full basement structural packages.
Q: What is your typical turnaround for structural works?
A: Small projects: 1–2 weeks.
Larger RC works: 4–12 weeks depending on scale.
Our Structural Projects in London
We’ve delivered structural alterations, steel frames, reinforced concrete slabs, retaining walls, and full structural solutions across London. Our work ranges from small RSJ installations in domestic properties to large-scale commercial RC works and industrial steel structures. Every project is engineered for strength, safety, and long-term performance.
Structural Works Across London by Borough
We work across all major boroughs, including: Camden, Brent, Barnet, Haringey, Hammersmith & Fulham, Kensington & Chelsea, Westminster, Southwark, Lambeth, Wandsworth, Greenwich, Newham, Tower Hamlets. Each borough has unique structural and access considerations — and our experience helps us deliver efficiently and compliantly across London.
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.
