Zero compromise on specification. Verified at every milestone.
Modern Clerk of Works oversight that protects your asset value.
In today's pressured delivery environment, inconsistent supply chain quality can lead to embedded errors and compliance failures. Operating with the technical rigour of a modern Clerk of Works, Tarj Construction provides independent, stage-by-stage verification across London and Essex. We protect developers, funders, and housing associations from 'specification drift', ensuring the final build satisfies Tier-1 structural warranty providers and eliminates long-term reputational risk in both new builds and large-scale refurbishments.
Comprehensive Quality Control & Assurance
Rigorous physical verification from groundworks to Practical Completion.
Technical Milestone Inspections
Executing targeted, milestone-based inspections across London and Essex to verify that the physical build strictly adheres to the approved design intent and UK Building Regulations.
Material Compliance & Workmanship
Protecting your asset from unauthorised 'value engineering' by ensuring all materials and site execution meet the exact project specification.
Active Defect & Snagging Management
Intervening proactively during the build phase to resolve non-conformances before they become embedded latent defects in complex conversion projects.
Digital Evidence & PC Readiness
Building a robust, photographic audit trail that guarantees a smooth handover to the client and latent defect insurer.
The Commercial Value of Independent Oversight
Protecting your profit margins, your timeline, and your asset's long-term reputation.
Defect Prevention & Margin Protection
Specification Integrity & Asset Value
De-risking Practical Completion (PC)
Structural Warranty & Insurer Confidence
Rigorous. Independent. Traceable.
Our methodology for enforcing site-wide quality control.
01. Pre-Commencement Specification Review
02. Inspection & Test Plan (ITP) Integration
03. Scheduled & Unannounced Site Audits
04. Non-Conformance (NCR) & Defect Logging
05. Corrective Action (CAP) & Remedial Verification
06. Practical Completion (PC) & Handover Assurance
Frequently asked questions
Most handover delays occur because latent defects are only discovered at Practical Completion (PC). By catching Non-Conformances (NCRs) during the build—while walls are open and the responsible trades are still mobilised across your London or Essex site—we ensure a seamless handover, protecting you from delayed PC and Liquidated Damages (LADs).
It shares the core objective of quality, but is modernised for the Building Safety Act era. We combine 'eyes on site' with digital, geo-tagged reporting. This ensures physical workmanship is matched by the 'Golden Thread' digital records required by modern regulators and funders.
No. The Principal Contractor retains responsibility. However, internal QC teams are often conflicted by programme pressures. We provide an uncompromised, independent 'second pair of eyes' that ensures technical standards are never sacrificed, especially in complex conversion projects.
We conduct strict 'Regulation 7' checks and on-site material verification. This protects developers from unauthorised 'value engineering' or illegal product substitutions—particularly concerning Part B fire safety materials. We ensure the specification you paid for is exactly what is installed.
Our frequency is risk-based and aligned with your master programme. We integrate our visits with 'hold-points' defined in the Inspection & Test Plan (ITP)—such as fire-stopping and building envelope closure—ensuring we are present before high-risk elements are concealed.
Yes. Tier-1 structural warranty providers demand absolute proof of compliance. Our staged reports and non-conformance close-out logs provide the exact third-party verification that underwriters and Building Control inspectors require for a smooth sign-off.




