Invoice clients for structural calculations, building condition surveys, and structural design. Professional invoices from Tidybill.
A structural engineer invoice covers structural design, assessment, and reporting services for buildings and infrastructure. Structural engineers design foundations, beams, columns, floors, and roof structures, and they assess the structural condition of existing buildings. Common private sector services include residential extension structural calculations, loft conversion design, party wall assessments, pre-purchase structural surveys, basement underpinning design, and historic building structural assessments. Chartered Structural Engineers (MICE, CEng, MIStructE) command premium fees. Fixed-price fees for standard residential work and day rate or time-based billing for complex or commercial work are both common.
| Service | Typical Rate | Unit |
|---|---|---|
| Residential structural calculations (extension) | 600 | project |
| Loft conversion structural design | 800 | project |
| Structural survey and report | 400 | report |
| Structural engineering (day rate) | 700 | day |
| Foundation design (standard residential) | 500 | project |
| Party wall structural assessment | 350 | assessment |
Residential project fees invoiced on completion of calculations. Commercial work invoiced monthly or at milestones. Reports on delivery. Net 14 for domestic clients; net 30 for commercial.