20-Year Lifetime Cost Comparison: Driveway Surfaces
(All costs are per square metre, excluding VAT. For a typical 50m² driveway, simply multiply by 50.)

1. Resin Bound Gravel
- Initial Installation: £70/m²
- Annual Maintenance: £1.50/m²
- Major Repairs (every 10 years): £9.50/m²
- 20-Year Maintenance: £1.50 x 20 = £30/m²
- 20-Year Repairs: £9.50 x 2 = £19/m²
- Total 20-Year Cost: £70 + £30 + £19 = £119/m²

2. Tarmacadam (Asphalt)
- Initial Installation: £57/m² (average)
- Annual Maintenance: £2/m²
- Major Repairs (every 10 years): £20/m²
- 20-Year Maintenance: £2 x 20 = £40/m²
- 20-Year Repairs: £20 x 2 = £40/m²
- Total 20-Year Cost: £57 + £40 + £40 = £137/m²

3. Concrete
- Initial Installation: £85/m² (average)
- Annual Maintenance: £2/m²
- Major Repairs (every 10 years): £15/m²
- 20-Year Maintenance: £2 x 20 = £40/m²
- 20-Year Repairs: £15 x 2 = £30/m²
- Total 20-Year Cost: £85 + £40 + £30 = £155/m²

4. Block Paving
- Initial Installation: £100/m² (average)
- Annual Maintenance: £3/m²
- Major Repairs (every 10 years): £20/m²
- 20-Year Maintenance: £3 x 20 = £60/m²
- 20-Year Repairs: £20 x 2 = £40/m²
- Total 20-Year Cost: £100 + £60 + £40 = £200/m2

Notes:
- Prices are averages for 2025 and should be confirmed for your specific location and project.
- Maintenance assumes regular cleaning and basic upkeep.
- Major repairs are estimated at two significant interventions over 20 years.
- Costs may vary based on site access, ground conditions, and material choices.