What Does a Works Over Report Include in Auckland?

A works over report is not a generic drain check. When a proposed building, extension, retaining work or other structure may sit over a council or Watercare-owned drainage asset, the report provides the verified information needed to assess the risk and support the approval process. So, what does a works over report include? It records where the asset is, what condition it is in, and how the proposed work relates to it.

For homeowners, this often becomes relevant after design work has started and a public drain is found beneath, or close to, the intended building footprint. For architects, surveyors and builders, getting this information early can prevent redesign, consent delays and costly changes once construction is underway.

Why a works over report is required

Public wastewater and stormwater assets need to remain protected and accessible. A building placed over a pipe can make future repair difficult, restrict access for maintenance, or create a greater risk if the line fails beneath a structure. The approval authority therefore needs reliable, site-specific evidence before it can consider whether works over the asset are acceptable.

The report is usually prepared following a CCTV drainage inspection and site investigation. It should not rely solely on old records or assumptions about where a pipe runs. Existing plans can be useful, but pipe alignments, connections and depths on site do not always match historic information.

Requirements vary according to the asset owner, the proposed work and site conditions. A report for a simple residential extension may be more straightforward than one for a multi-unit development, deep excavation or work near a large public main. The purpose remains the same: provide accurate drainage evidence for a properly informed decision.

What does a works over report include?

A professional report brings the inspection findings, location information and supporting documentation into one clear record. The exact format can differ, but the following information is commonly needed.

Property and project details

The report identifies the site, usually by street address and legal description where available, along with the client, inspection date and purpose of the investigation. It should describe the proposed project in enough detail to establish why works-over approval is being sought, such as a new dwelling, garage, extension or redevelopment.

This context matters. The reviewer needs to understand whether the asset is affected by a finished building, a new foundation, excavation, retaining wall, driveway or another element of the proposed works.

Identification of the public drainage asset

The report should clearly identify the relevant public asset, including whether it is wastewater or stormwater. Where it can be established through inspection, it may also record the pipe material, approximate diameter and direction of flow.

A key distinction is that private drainage and public drainage are not the same thing. A CCTV inspection may reveal several lines on a property, but the works over report needs to focus on the council or Watercare-owned asset that triggers the requirement. Connections, junctions, access points and manholes may also be recorded where relevant.

CCTV inspection evidence and pipe condition

CCTV footage is central to the report because it gives the reviewer a direct view inside the pipe. The inspection records the condition of the accessible section and identifies issues that may affect the proposal or require attention before construction.

Typical observations can include cracking, fractures, displaced joints, root intrusion, deformation, corrosion, sediment build-up, blockages, intruding connections or sections affected by previous repair work. The report should explain the location and significance of any defect rather than simply state that a problem was found.

Condition evidence protects all parties. If a public asset is already damaged before works begin, the pre-construction record can help distinguish that existing damage from any issue identified later. Conversely, a pipe in poor condition may affect whether building over it is practical at all.

Drain location and site plan

A works over report normally includes a plan showing the surveyed or traced location of the drainage asset in relation to site boundaries and the proposed building footprint. This is one of the most useful parts of the documentation because it turns camera findings into information that designers and consent reviewers can use.

The plan should show enough detail to understand the pipe alignment, relevant access points and the relationship between the asset and proposed structures. Where practical, it may include depths, levels, offsets, pipe sizes and the position of inspection points.

Accuracy is critical here. A line shown generally in the right area is not sufficient if foundation locations, excavation limits or structural elements are close to it. Drain locating should be carried out alongside the CCTV investigation so the report reflects the physical asset on site, not just an estimated route.

Relationship to the proposed works

The report needs to make the practical conflict clear. This usually means showing whether the asset runs beneath the proposed building, close to foundations, within an excavation area or beside a retaining structure.

It may describe available clearances and highlight areas where the proposed design could compromise the pipe or future access. This is especially relevant where the line changes direction, passes near a boundary, or sits at a shallow depth. A pipe that appears clear of a building footprint on a sketch may still be affected by footings, ground beams or construction access.

The report is evidence, not a substitute for structural or civil design. Where changes to design, protection measures, pipe diversion or specialist engineering are needed, those requirements are normally addressed through the appropriate design and approval process.

Photos, screenshots and inspection records

Clear visual evidence makes a report easier to review. Still images captured from CCTV footage can show pipe condition, defects, junctions and other relevant observations. Site photographs may also show access chambers, manholes, inspection locations or physical constraints around the property.

The report should reference the full CCTV recording and inspection log so findings can be checked. Good documentation is specific: it identifies what was observed, where it was observed and how the location was established.

Findings, limitations and recommended next steps

The final section should state the findings in plain language. It may confirm that a public asset has been located, identify its observed condition, and explain the relationship between that asset and the proposed works.

It should also be upfront about limitations. A camera can only inspect sections that are accessible and passable. Heavy debris, a blockage, damaged pipework, inaccessible access points or an unverified connection can limit what can be confirmed. These limitations should be recorded rather than overlooked, as they may require cleaning, further investigation or revised information.

Recommendations may include drain cleaning before a further CCTV inspection, additional locating, design review, repair of defects, or discussion with the relevant approval authority. The right next step depends on the findings, not a one-size-fits-all checklist.

What a works over report does not do

A works over report supports an application or assessment, but it does not by itself grant permission to build over a public asset. It is also not a building consent, a structural producer statement or a pipe diversion design.

This distinction avoids a common project problem: assuming the report means the drainage issue has been resolved. The report provides the factual basis for decisions. Approval conditions, design changes and construction requirements may still follow.

When to arrange the inspection

The best time is before plans are locked in. If there is any indication of a public drain crossing the property or running near the proposed construction area, early CCTV inspection and locating give the design team options. Moving a building footprint on paper is usually simpler than changing foundations after consent documentation is underway.

For established projects, arrange the inspection before excavation begins. Once heavy machinery is on site, access to chambers can be obstructed and the consequences of an unknown pipe alignment become more expensive. Drainage TV Ltd prepares works over reports using CCTV inspection and practical site information so project teams can act on clear evidence.

A useful report does more than satisfy a document request. It gives the people making decisions a clear view of what is below the ground, before the work above it becomes difficult to change.