Clerk of Works & Site Inspections in London
Defects are cheap to fix while the builder is still on site — and expensive forever after. Wimbledon Surveyors provides clerk of works-style inspections across London, independently checking workmanship at the stages that matter most. Book site inspections.
Why Independent Inspection Pays
Building control checks minimum compliance, not quality. An independent inspector working for you checks the things that cause problems later: damp-proofing details, structural connections, roofing and drainage.
Key-Stage Inspections
We inspect at critical stages — foundations, structure, first fix, pre-plaster, completion — when defects are still visible and correctable.
Clear Reports After Every Visit
Each inspection produces a photographic report listing items for the contractor to correct, creating a paper trail that keeps standards up and disputes down.
From Inspection to Handover
At completion we roll into a full snagging survey, so you take handover with every defect documented.
Protect Your Build
Periodic inspections cost a fraction of the defects they prevent. See our project management services or contact us.
Clerk of Works and Independent Site Inspections
Almost everything that goes wrong with a finished building was visible, briefly, during construction — the missing damp-proof course detail, the under-lapped membrane, the wrong fixings — before it was covered up. A clerk of works is the profession’s answer: an independent, experienced inspector on site regularly, checking materials and workmanship against the drawings and specification while defects are still cheap to fix. We provide clerk of works and site inspection services across London and Essex, for homeowners, developers, landlords, management companies and institutions.
What Our Inspectors Check
- Setting out and substructure — foundations, damp-proofing and drainage before they disappear below ground.
- Structure — steelwork, padstones, wall construction, floor and roof framing installed as designed, coordinated with our structural team.
- Weathering and envelope — roofing, flashings, cavity trays, membranes and insulation continuity.
- First and second fix — services routing, fire-stopping, and the workmanship that determines how a building performs for decades.
- Materials — checking what is delivered and installed matches what was specified and priced.
- Finishes and completion — snagging inspections against a professional standard, not a walk-round with the builder.
Independent Eyes Change Behaviour
The value of a clerk of works is only partly the defects found — it is the defects that never happen because the site knows work will be inspected. Every visit is recorded in a written report with photographs, creating a quality record that supports payment decisions under your building contract, feeds our contract administration where we hold that role, and becomes powerful evidence if disputes arise later. Where matters do escalate, our expert witness surveyors can build on an inspection record that was made contemporaneously — the strongest kind.
Inspection Regimes to Fit the Project
Full-time clerks of works suit major schemes, but most projects are protected well by proportionate regimes: weekly or fortnightly visits, key-stage inspections timed to foundations, structure, pre-plaster and completion, or targeted inspections of high-risk packages such as roofing and waterproofing. For buyers of new-build homes we carry out professional snagging surveys before completion, and for landlords and RMCs we inspect major works funded through service charges — where Section 20 consultation makes independent oversight especially valuable.
Qualified, Experienced, On Your Side
Our inspectors are construction professionals with surveying backgrounds — people who have specified, administered and investigated buildings, and know where corners get cut. Reports are plain-spoken, photographic and actionable: what we found, what standard applies, what must be corrected and by when. If you are committing serious money to construction, the question is not whether you can afford inspection — it is why the work should be trusted without it.
Frequently Asked Questions
A clerk of works independently inspects construction work in progress — materials, workmanship and compliance with drawings and specification — and reports defects while they can still be corrected economically. They act for the client, not the contractor, and their reports form a contemporaneous quality record.
It depends on project pace and risk: full-time on major schemes, weekly or fortnightly on typical refurbishments and extensions, or key-stage visits (foundations, structure, pre-plaster, completion) on smaller works. We recommend a regime proportionate to what is at stake and price it accordingly.
On structural renovations and extensions, usually yes — a modest inspection fee routinely intercepts defects that would cost multiples to open up and fix after completion, and the inspection record strengthens your position on payment and defects under the contract.
Building Control checks compliance with minimum Building Regulations at a handful of statutory stages. A clerk of works checks your project against its full specification and quality standard, far more frequently and solely in your interest. One is a legal minimum; the other is quality assurance.
Yes — professional snagging surveys before or shortly after completion, producing a schedule of defects the developer must address, from cosmetic finish issues to non-compliant workmanship the untrained eye misses.