How Much Block Paving Do I Need?
Quick Answer
~50 blocks per m² (200×100mm). 20m² drive = ~1,000 blocks + 5% waste
Based on: Standard 200mm × 100mm × 50mm blocks in herringbone pattern
How We Calculated This
- Standard block size: 200mm × 100mm = 0.02m² per block
- Blocks per m²: 1 ÷ 0.02 = 50 blocks
- 20m² driveway: 20 × 50 = 1,000 blocks
- Plus 5% cutting waste: 1,000 + 50 = 1,050 blocks
Blocks Per m² by Size
- 200 × 100mm (standard): 50 blocks/m²
- 200 × 133mm: ~38 blocks/m²
- 200 × 200mm: 25 blocks/m²
- 210 × 140mm: ~34 blocks/m²
Waste Allowance
- Rectangular areas, stretcher bond: 5% waste
- Herringbone (45°): 5–10% waste
- Curved edges or circles: 10–15% waste
Sub-base and Laying Course
Block paving needs a proper base:
- Sub-base: 100–150mm compacted MOT Type 1
- Laying course: 30–40mm sharp sand (screeded level)
- Blocks: 50mm or 60mm thick
- Kiln-dried sand: Brushed into joints after compaction
Cost Guide (2026)
- Budget blocks: £15–25/m² (supply only)
- Mid-range blocks: £25–45/m²
- Premium blocks: £45–80/m²
- Professional installation: £60–120/m² (supply and lay)
Planning Permission
Since 2008, if you are paving more than 5m² at the front of your property, the surface must be permeable or drain to a permeable area. Permeable block paving or paving with gaps for drainage satisfies this requirement.
Last updated: April 2026