
ITSA provides independent Clerk of Works and construction quality inspection services across London, the South East and the UK. We inspect workmanship against drawings, specifications, Building Regulations and relevant British Standards, supported by clear photographic reporting.
We operate with uncompromising honesty and technical discipline, ensuring robust construction verification. Our duty is to maintain quality oversight throughout the build process, calling out defects, non-compliance, and risk without bias while providing technical site assurance.
Assurance is not merely a site visit; it encompasses the systematic verification of construction against design, specification, and standard. We do not rely on 'It looks right.' Our approach includes quality oversight through structured processes, backed by high-resolution reporting and traceable records. This ensures that every element is built exactly as intended, providing comprehensive technical site assurance.
We safeguard our clients’ assets, reputation, and liability exposure through comprehensive construction verification and quality oversight. By early identification of defects and robust documentation, we reduce risk, prevent rework, and ensure a defensible audit trail with effective technical site assurance.

Independent Building and M&E Clerk of Works inspections covering workmanship, materials, finishes, services coordination, drawings, specifications, snagging and defects. Clear photographic reports provide clients with an evidence-based record of construction quality and compliance.

Independent inspection of fire stopping, fire doors, cavity barriers and compartmentation before works are concealed. We provide clear photographic evidence of installation quality, defects and compliance with project drawings, specifications and relevant fire safety requirements.

Independent Clerk of Works and technical consultancy support for projects requiring targeted site inspections, quality reviews, snagging, defects analysis or additional client-side assurance. Flexible input provides clear evidence, practical advice and focused risk control when it is needed most.

Independent condition surveys for buildings, properties and construction projects, identifying visible defects, deterioration, maintenance needs and potential liabilities. Clear photographic reports provide clients with practical evidence to support repairs, investment decisions and risk management.
Looking for independent Clerk of Works support in London, the South East or across the UK? Contact ITSA to discuss site inspections, construction quality assurance, fire compartmentation, snagging and condition surveys.
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