Coastal Engineering Experts • Heritage Property Specialists • Holiday Let Conversions
Get a Fixed-Price Quote >A typical residential structural inspection in Cornwall ranges between £350 and £650. For full calculation packages (e.g., for extensions, loft conversions, or holiday let structural alterations), fees typically range from £800 to £1,800 depending on property complexity, access constraints, and coastal exposure considerations.
Peninsula Specialists With Unique Local Knowledge
Much of Cornwall sits on granite bedrock with varied ground conditions. Foundation design needs to account for the local geology—whether that means shallow strip foundations on solid rock, or deeper solutions for clay-over-granite sites. We design appropriate foundations and coordinate with ground investigation specialists when needed.
Cornwall’s exposed coastline subjects buildings to severe wind loading (BS EN 1991 zones 4–5). Roof ties, structural bracing, and connection details all need upgrading compared to sheltered inland sites. We design for the worst-case scenario to ensure your property withstands Atlantic storms.
With the FHL tax regime ending April 2025 and councils imposing 100% council tax on second homes, many owners are converting properties to achieve the 90-night commercial letting threshold. This often requires structural work: accessibility modifications, additional bedrooms, en-suites, and energy efficiency upgrades.
Cornwall has over 130 conservation areas and thousands of listed buildings—from medieval cottages to engine houses. Structural work in these settings requires sympathetic design using local materials (granite, cob, slate) and reversible interventions that heritage officers will approve.
Many older Cornish properties are built from cob (earth and straw) or random rubble stone. These materials require specialist understanding—cob walls must be kept dry and cannot take point loads, while stone walls need lime-based mortars. We have tested methodologies for both.
Full structural assessment, beam design, and Building Control submission for internal wall removals in Cornish stone, cob, and granite properties.
Precise steel beam sizing for open-plan conversions, loft strengthening, and holiday let reconfigurations. Marine-grade specifications for coastal properties.
Specialist foundation design for Cornwall’s varied ground conditions. We work with geotechnical consultants to ensure your foundations suit the local geology, from granite bedrock to coastal clay.
Complete structural packages for extensions, barn conversions, and holiday let upgrades. Designed for Cornwall’s challenging geology and weather exposure.
Padstow, PL28
Structural design for converting a 3-bed residential property into a 5-bed commercial holiday let. Added ground-floor extension with en-suite bedrooms, accessibility-compliant entrance, and structural alterations to meet the 90-night letting threshold. Marine-grade fixings specified throughout.
Falmouth, TR11
Two-storey rear extension on a cliff-top property with extreme wind exposure. Designed enhanced roof tie-downs, structural bracing to BS EN 1991 wind zone 5, and piled foundations to 4 m depth on weathered granite. Full maritime specification for all steelwork.
Truro, TR1
Internal structural alterations to a Grade II listed Georgian townhouse in Truro city centre. Removed two load-bearing walls using concealed steel with reversible connections. Specified lime plaster finishes and heritage ironmongery to satisfy the Conservation Officer.
St Ives, TR26
Structural assessment and repair design for a Grade II listed fisherman’s cottage suffering from salt-induced masonry decay. Specified lime mortar repointing, stainless steel wall ties, and concealed steel lintel replacements. All work approved through Listed Building Consent.
Newquay, TR7
Foundation design for a Modern Methods of Construction (MMC) modular holiday unit. Designed screw pile foundations to avoid wet trades on a sensitive coastal dune site, with structural connections compliant with PAS 8700:2025 for offsite construction.
| Service Type | Starting From | Typical Turnaround |
|---|---|---|
| Structural Site Visit | £400 | 48 Hours |
| Single Beam Calculation | £500 | 48 Hours |
| Full Design Pack | £900 | 3–5 Working Days |
| Foundation Design Package | £750 | 5–10 Working Days |
| Holiday Let Conversion Pack | £1,200 | 5–10 Working Days |
Local Authority Building Control for all of Cornwall
For Listed Building Consent & Conservation queries
For CL8/CL23 mining searches
📞 0300 1234 151 (ask for Mining)
Pydar House, Pydar Street, Truro, TR1 1XU