Complete Price Guide 2025
Radon Mitigation Costs UK
Active sump systems £800-£1000, positive pressurisation £600-£900. Get accurate quotes from certified radon contractors with our comprehensive cost guide.
2025 Radon Mitigation Costs
Professional radon mitigation costs vary based on system type, property size, foundation structure, and location.
Active Sub-Slab Depressurisation
Most effective method - creates negative pressure under foundation
Fan installation, pipe work, external venting, validation testing included
Positive Pressurisation Systems
Fan system creates positive pressure to prevent radon entry
Fan unit, ducting, controls, validation testing included
Additional Costs to Consider
Beyond mitigation system costs, factor in testing, validation, monitoring equipment, and property-specific requirements.
Testing Costs
- Short-term test (2-7 days): £50-£100
- Long-term test (3+ months): £30-£60
- Continuous monitor: £150-£300
- Post-mitigation validation: £80-£150
Location & Property
- Standard residential: Base price
- Large properties: +30-50%
- London/South East: +15-25%
- Commercial properties: +40-80%
System Enhancements
- Radon alarm system: £200-£400
- Advanced monitoring: £150-£300
- Multi-zone systems: +£400-£800
- Foundation sealing: £200-£600
Real Project Cost Examples
Actual radon mitigation costs from recent projects to help you budget effectively.
Small House
Standard sump system installation
Timeline: 1-2 days
Cost Breakdown:
Medium House
Positive pressurisation system
Timeline: 1 day
Cost Breakdown:
Large Property
Multi-sump system with monitoring
Timeline: 2-3 days
Cost Breakdown:
Factors Affecting Radon Mitigation Costs
Understanding what drives costs helps you plan and budget more effectively.
| Cost Factor | Impact | Description |
|---|---|---|
| System Type | High | Active sump systems (£800-£1000) vs positive pressurisation (£600-£900) |
| Property Size | Medium | Larger properties may require multiple sump points or zones |
| Foundation Type | High | Solid concrete, suspended floors, or basements affect installation complexity |
| Location | Medium | London and South East typically 15-25% higher than national average |
| Radon Levels | Medium | Higher levels may require more powerful systems or multiple intervention points |
| Building Type | Medium | Commercial properties often 40-80% higher due to size and compliance requirements |
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Note: This calculator provides rough estimates only. Actual costs depend on many factors. Always get detailed quotes from qualified contractors.
How to Control Asbestos Removal Costs
Smart strategies to manage costs without compromising safety.
Planning & Preparation
- Get radon testing done early to plan properly
- Consider passive systems where levels are moderate
- Install during new construction for lower costs
- Ensure easy access to installation areas
Contractor Selection
- Get 3-5 quotes from certified contractors
- Check UK Radon Association certification
- Verify insurance and workmanship guarantees
- Ensure post-mitigation testing is included
Helpful Resources
Connect with UK Radon Association certified specialists in your area
Learn about certified radon mitigation services
Download comprehensive radon safety resources
Learn about our verified specialist network
Learn about radon gas and its sources in UK properties
Understand the health implications of radon exposure
Identify high-risk radon areas across the UK
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