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Accurately record what has been installed underground.
MCS Surveyors provide professional as-built underground services surveys to verify the exact location, depth, and alignment of installed subsurface infrastructure. Whether you are completing a civil, commercial, or residential project, our surveys provide the documentation required by councils, asset owners, and developers for final approvals and long-term utility management.
Accurate as built records are essential for confirming that services have been installed according to design specifications and safety requirements. They also play a critical role in reducing risk during future excavation, maintenance, or upgrades. Our experienced team delivers precise, reliable survey data in a format that is easy to interpret and ready for submission.
An as-built underground services survey, also known as an as-constructed or post-construction utility survey, captures the actual location and depth of newly installed subsurface infrastructure. It is conducted after construction or installation is complete and provides a detailed map of how the services have been laid in the field compared to the original design.
This survey is required to verify that underground services meet regulatory and engineering requirements. It also ensures that infrastructure can be easily located in the future, reducing the risk of service strikes or design conflicts. At MCS Surveyors, we produce high-quality, certified as built documentation that meets council and utility authority expectations.
As Built surveys for underground services are commonly required in the following situations:
By engaging MCS Surveyors for your as built utility survey, you can be confident that your project will meet all compliance requirements and provide long-term value to stakeholders.
Our as-built underground services surveys provide detailed, accurate information about all key elements of the installed infrastructure. This typically includes:
Each survey is customised to suit the type of infrastructure installed and the level of detail required. We work closely with contractors and project managers to capture all relevant data before backfilling or project closeout.
At MCS Surveyors, we use a combination of traditional and modern surveying techniques to deliver accurate and reliable results. Our process involves:
We review the approved design drawings and installation records where available, along with any construction logs or trenching documentation. This helps us understand the expected service alignment and depth.
Using total station, robotic survey instruments, and GNSS equipment, our team records the physical location of subsurface infrastructure as observed through open trenches, exposed pits, or surface access points. We can also incorporate trench measurements before backfilling is completed to ensure precision.
Survey data is processed and cross-checked against the original design plans to verify accuracy. Any variances are flagged for review or commentary, helping project teams understand and address changes or deviations from design.
Final as built plans are prepared in CAD and PDF formats and clearly annotated with service types, depths, and horizontal positions. We prepare the deliverables to meet the specific requirements of councils, utility authorities, and design teams.
All surveys are completed in accordance with the Australian Standard AS5488 for subsurface utility information, and we provide quality levels based on the method and accuracy of data collection.
Our as built underground services surveys can be used to capture any subsurface utility or infrastructure element, including:
We are also able to document mixed service corridors, complex reticulation systems, and multi-stage utility installations across large subdivisions or infrastructure projects.
MCS Surveyors is a trusted provider of underground utility surveys across Sydney and New South Wales. With over three decades of combined experience, our team understands the technical, regulatory, and logistical requirements of as built documentation.
To support a complete underground utility solution, we also provide:
Our services can be combined to deliver a full project lifecycle solution from early design through to final handover.
Our 30 years of combined experience in this industry has allowed us to consistently provide the best survey services to our clients for their residential, commercial, civil, and industrial properties in Sydney & Wollongong. Get in touch today for free preliminary advice and quote.
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