Cost Breakdown by Task
Typical UK costs (2024–2025). Ranges vary by region, wall type, and finish level. Always obtain 3 quotes.
Quick read
A standard load-bearing knock-through in a UK semi-detached home typically runs £8,000–£18,000 total, including structural work, plastering, flooring, and a basic kitchen update. Non-load-bearing walls can cost as little as £1,500–£4,000. The single biggest cost variable is whether a steel RSJ beam is required.
| Task ↕ | Category ↕ | Low Est. ↕ | High Est. ↕ | Load-Bearing? ↕ | Notes |
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Structural Requirements by House Type
Wall type and house era determine the structural scope. Use this to scope preliminary conversations with builders and structural engineers.
| Property Type ↕ | Era ↕ | Wall Type ↕ | RSJ Beam? ↕ | Planning Permission ↕ | Complexity ↕ | Key Considerations |
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Layout & Zoning Strategies
How you divide the new open space matters as much as removing the wall. These strategies apply to rooms of different sizes.
| Strategy ↕ | Room Size ↕ | Zoning Method ↕ | Cost Impact ↕ | Best For ↕ | Pitfall to Avoid |
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Design Style Comparison
Match your open-plan kitchen-diner to a cohesive design language. Each style has different material and budget implications.
| Style ↕ | Key Materials ↕ | Cabinet Style ↕ | Flooring ↕ | Budget Level ↕ | Works With ↕ | Signature Feature |
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Phase-by-Phase Project Checklist
Work through these phases in order. Items marked with ⚠ have dependencies on the previous phase being complete.
Before you start
Do not start demolition until structural engineering sign-off is in writing. The sequence below reflects the professional build order — skipping phases can create expensive rework.
Frequently Asked Questions
Practical answers to the questions most homeowners ask before starting a knock-through project.