Structural Calculations in Salisbury — Engineer-Certified from £350
Engineer-certified structural calculations for your extension or wall removal. Covers beam sizing, foundation design, and Building Regulations compliance.
What's included
- Engineer-certified beam sizing
- Foundation design recommendations
- Load path analysis
- Building Regulations compliance notes
- Digital delivery within 5 working days
Structural Calculations for Salisbury Extensions
Every extension and load-bearing wall removal needs structural calculations signed off by a qualified engineer. In Salisbury, where rear extensions on Victorian semis, loft conversions for growing families, and careful extensions to properties in the cathedral conservation area, getting the steelwork right is the difference between a smooth build and expensive on-site changes.
What structural calculations cover
Beam sizing for load-bearing wall removals, padstone specifications, foundation design, lintel calculations for new openings, and roof structure modifications. Everything your builder and building control inspector need to approve the structural work.
Common structural work in Salisbury
Salisbury has a cathedral city with medieval properties in the Close, Georgian terraces in Fisherton, Victorian semis in Harnham, and modern estates in Old Sarum and Bishopdown. Common projects include rear extensions on Victorian semis, loft conversions for growing families, and careful extensions to properties in the cathedral conservation area. Each property type has different structural characteristics — a Victorian terrace with solid brick walls behaves differently to a 1970s cavity-wall detached house.
Building control compliance
Wiltshire Council building control will need to see approved structural calculations before work begins on any load-bearing element. Our engineer-certified calculations satisfy this requirement and are accepted by all approved inspectors.
Typical properties in Salisbury

Ashley Road, Salisbury — late 19th-century terraced housing first mapped on the 1901 OS survey
Fig. 2

Hudson Road, Salisbury — typical residential street in the city's inner suburbs
Fig. 3
Structural Calcs questions in Salisbury
Structural Calcs in other areas
Other services in Salisbury
3D Laser Survey
£650
A 1.5-hour on-site visit with a 3D laser scanner to capture millimetre-accurate measurements of your property. The foundation for precise structural calculations and planning drawings.
Planning Application
£2,200
Full householder planning application preparation and submission. We handle the drawings, design and access statement, and council liaison from start to finish.
Building Regulations Drawings
£399
Technical construction detail drawings that satisfy Building Regulations. Covers insulation, drainage, structural details, and everything your builder and building control need.
Builder Introduction
£149
We match you with 2–3 vetted local builders who specialise in your type of project. Includes a professional brief so every builder quotes on the same scope.
Certificate of Lawfulness
£1,500
A legal document confirming your extension falls within Permitted Development rights. Protects you at resale — mortgage lenders and solicitors expect it.
Build Coach
from £49/mo
Ongoing expert support throughout your build. From fortnightly AI check-ins to weekly human coaching calls, builder mediation, and trade price verification.
Ready to get started in Salisbury?
Structural Calculations from £350. Fixed price, no obligation.
Every plan drawn by qualified drafters in Poole, Dorset
Serving homeowners across Poole, Bournemouth, Christchurch, Wimborne, Wareham, and the wider Dorset area.
Useful links for Salisbury homeowners
External resources we recommend. Links open in a new tab.