Calculate Your Structural Engineer Fees
Frequently Asked Questions
How much does a structural engineer cost in the UK in 2026?
Structural engineer fees in the UK typically range from £300 to £1,500 for residential projects such as load-bearing wall removal or a loft conversion. More complex projects such as basement conversions cost £2,000–£5,000. New residential builds are usually charged at 1–2% of the build cost. Always request an itemised quote.
Do I need a structural engineer for a loft conversion?
Yes. A structural engineer is required for virtually all loft conversions to design the new floor structure, ridge beam (if the roof is altered), and to check that the existing walls can carry the additional load. Structural calculations are submitted as part of the building regulations application. Fees are typically £500–£1,000.
What is included in structural engineer fees?
Structural engineer fees typically include a site visit, structural calculations, specification of materials (steel beams, padstones, lintels), and drawings suitable for building regulations submission. Some engineers also provide on-site inspections during construction; this may be charged separately at £150–£300 per visit.
Is VAT charged on structural engineer fees?
Yes. Structural engineer fees are subject to 20% VAT. Fees shown in this calculator are exclusive of VAT. Always check whether quotes include or exclude VAT before comparing prices.
When do I need to submit structural calculations to building control?
Structural calculations must accompany a Full Plans building regulations application for projects involving structural elements — this includes load-bearing wall removals, loft conversions, extensions and new builds. Building control officers review the calculations before issuing approval. A Building Notice application may not require upfront calculations but the structural work will still be inspected on site.