Additional loft volume calculator

UK Loft Conversion Volume Calculator

Property Type: Terraced House Semi-Detached House Detached House

Loft Length (meters):

Loft Width (meters):

Average Height (meters):

Existing Volume Used (m³ - optional):

Additional Volume: 0 m³

Total Volume Used: 0 m³

Permitted Development Allowance: 0 m³

Note: This calculator follows UK permitted development guidelines (40m³ for terraced houses, 50m³ for semi/detached). Measurements should be based on external dimensions. Always consult with local planning authority before proceeding.