Sharp architectural elevation drawing of a modern residential extension, clean steel blue lines on a white background, technical blueprint style, high-contrast, 35mm
Sharp architectural elevation drawing of a modern residential extension, clean steel blue lines on a white background, technical blueprint style, high-contrast, 35mm
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JH Structures

Chartered Structural Engineering & Design

We provide precise structural calculations, detailed drawings, and steelwork specifications for residential extensions and loft conversions across Hampshire, Surrey, and Berkshire.

Technical Expertise

Our Engineering Services

We deliver builder-ready calculations and detailed structural drawings designed to secure building regulations approval and ensure exact execution on site.

Structural Calculations

Extensions & Lofts

Foundations & Steelwork

Accurate structural calculations for steel beams, timber rafters, and concrete elements, fully compliant with current British Standards and building regulations.

Comprehensive structural design packages for complex residential extensions, loft conversions, and internal load-bearing wall removals with clear drawings.

Detailed foundation design, retaining wall specifications, and structural steelwork connection details optimized for straightforward installation by your contractor.

Our Methodology

The Path to Approval

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Initial Review

Rigorous Design

Detailed Drafting

Regulatory Submission

We assess your architectural drawings to identify load paths and structural requirements.

We perform precise calculations to specify structural steel, timber, and concrete elements.

We produce clear, buildable drawings and specifications optimized for your contractor.

We compile the full structural package required for building control sign-off.

Request calculations

Secure Structural Certainty

Submit your architectural plans today for a comprehensive, building-regulation-compliant structural calculation package optimized for your contractor.