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Build a reinforced concrete wall.
Retaining, basement or structural concrete walls — shuttered, reinforced and poured to engineer's drawings.
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Inadequate reinforcement
Wall fails under load. Engineer designs rebar properly.
Cold joints in concrete
Pours not completed in one shot. Visible joins weaken.
Surface finish
Cheap formwork = poor finish. Specialised steel formwork for premium.
Curing too fast
Hot weather causes cracks. Wet-cure or curing compounds.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Reinforced concrete wall per m²200-300mm thick
£300–£800/m²
Heavy duty (thick) per m²400mm+ thick
£500–£1.2k/m²
Formwork (shuttering) per m²Steel or timber
£30–£80/m²
Steel reinforcement per tonnePer tonne installed
£1.2k–£2.5k
Basement wall (full)20-40m² typical
£20k–£60k
Large retaining wallPer project
£10k–£30k
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
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Reinforced concrete walls support major loads — basements, retaining walls, structural elements. Steel rebar in concrete. Expect to pay £300–£800 per m² for UK reinforced concrete wall.
What Does the Work Involve?
Structural engineer designs wall and reinforcement. Excavation. Formwork (shutters) erected. Steel reinforcement positioned (rebar). Concrete poured. Cured 7-28 days. Formwork removed. Surface finished (rendered, tanked for basement, or exposed).
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Reinforced concrete wall per m² | 300 | 800 | 200-300mm thick |
| Heavy duty (thick) per m² | 500 | 1,200 | 400mm+ thick |
| Formwork (shuttering) per m² | 30 | 80 | Steel or timber |
| Steel reinforcement per tonne | 1,200 | 2,500 | Per tonne installed |
| Basement wall (full) | 20,000 | 60,000 | 20-40m² typical |
| Large retaining wall | 10,000 | 30,000+ | Per project |
| Tanking (basement) | 1,500 | 5,500 | Waterproofing |
How Long Does It Take?
Reinforced concrete wall install: 1-2 weeks for standard. Plus cure (7-28 days). Major projects: 2-6 weeks.
DIY or Professional?
Specialist groundworker or concrete contractor. Structural engineer mandatory. Premium specialist work.
Choosing the Right Tradesperson
Specialist reinforced concrete contractor. Major name for large projects: Costain, Galliford Try, or specialist subcontractor.
UK Regulations
Building Regs Part A. Structural design by chartered engineer. Building inspector approval. CDM 2015 for safety.
Common Problems
- Inadequate reinforcement: Wall fails under load. Engineer designs rebar properly.
- Cold joints in concrete: Pours not completed in one shot. Visible joins weaken.
- Surface finish: Cheap formwork = poor finish. Specialised steel formwork for premium.
- Curing too fast: Hot weather causes cracks. Wet-cure or curing compounds.
Frequently Asked Questions
When use reinforced concrete?
Basement walls, retaining walls over 1m, structural columns and beams, foundations for tall buildings.
Cost vs block wall?
Reinforced concrete: 2-3x block wall. Reserved for structural applications. Block adequate for non-structural.
Basement wall cost?
20-40m² basement wall: £20,000-£60,000. Major investment. Tanking adds £1,500-£5,500.
How long does reinforced concrete last?
100+ years for quality construction. Indefinite in stable conditions.
Tanking essential for basement?
Yes for habitable basement. Type A (cement coating) or Type C (cavity drainage). Major cost.
Will reinforced concrete crack?
Hairline cracks normal as concrete cures. Significant cracks indicate problem with design or pour.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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