Structural calculations are a critical part of most building projects, yet many homeowners are unsure when they need them.
What Are Structural Calculations?
Structural calculations are mathematical analyses performed by a qualified structural engineer to ensure that a building can safely carry the loads placed upon it. They determine the size and specification of beams, lintels, foundations, and columns.
When Are They Required?
- Removing load-bearing walls
- Loft conversions: Floor strengthening and new beams
- Extensions: Foundation design and structural openings
- New openings in walls
- Chimney breast removal
- New builds: Complete structural design
What Do They Include?
- Load analysis (dead loads, live loads, wind loads)
- Beam and lintel sizing with steel specifications
- Foundation design
- Floor joist sizing and timber specifications
- Connection details
- Engineer certification
Costs
- Single beam calculation: £300 to £500
- Loft conversion package: £600 to £1,200
- Extension package: £500 to £1,000
- New build package: £1,500 to £3,000+
Who Prepares Them?
Structural calculations must be prepared by a qualified chartered structural engineer with IStructE or ICE membership.
QM Designs Structural Engineering Service
We work with qualified chartered structural engineers to provide complete packages alongside our architectural drawings. Learn more.
