Practical calculations, drawings and site support for extensions, loft conversions, refurbishments, basements and new‑build developments — from feasibility through to Building Control.
Full calculation packages, steel beam sizing and construction drawings — prepared to be understood by your architect, your builder and your Building Control officer alike.
Single and double‑storey rear extensions, open‑plan kitchens and bi‑fold openings — engineered around the home you actually want, not the easiest one to calculate.
Underpinning, retaining walls and structural due diligence for basement developments, commercial refurbishments, change‑of‑use projects and community buildings.
Condition surveys, crack and movement monitoring, and pre‑purchase structural opinions — clear, plain‑English reporting for homeowners, buyers and lenders alike.
Architectural drawings, photographs and project details.
We review the scope and issue a fixed quotation.
Carried out where the project requires it.
Structural calculations and drawings prepared.
Documents issued for approval and construction.
Ongoing engineering support where included.
Filter by project type — new work is added here as jobs complete.
Every project is quoted individually — these ranges give a realistic starting point. All figures exclude VAT.
| Structural Item | With Drawing | No Drawing |
|---|---|---|
| Chimney Breast Removal | £275 | £450 |
| Wall Removal | £250 | £700 |
| Single Storey Rear Extension | £300 | £750 |
| Side Extension | £350 | £750 |
| 2‑Storey Side Extension | £900 | £1,500 |
| Loft Conversion | £600 | £1,050 |
| Basement | £1,250 | £2,700 |
Provision of a Professional Consultant's Certificate for newly constructed or converted residential property, subject to satisfactory review of the design information, construction records and site inspections.
The certificate confirms that, based on the consultant's reasonable professional skill and care and the inspections undertaken, the property has generally been constructed in accordance with the approved design and applicable Building Regulations.
Six‑Year Professional Consultant's Certificate
Provision of staged construction inspections, review of the architectural and structural design information, Building Regulations documentation and completion records, culminating in the issue of a six‑year Professional Consultant's Certificate, subject to satisfactory inspection of the works and receipt of all required supporting documentation.
Clear calculations and a genuinely fast turnaround — approved first time.
Practical site advice when we hit an unexpected drainage run.
Professional drawings our architect could work with directly.
In most cases, yes — Building Control requires calculations for new structural openings, beams or foundations.
If the wall is load‑bearing, yes. We can review your plans and confirm this before you commit to a quotation.
Yes — our packages are prepared specifically for Building Control submission across London and the South East.
Yes, where the project requires it — particularly for surveys, basements and complex alterations.
Architectural drawings or sketches, photographs of the existing structure, and a short project description.
Send over your drawings and photographs, and we'll come back with a quotation — usually within one working day.
