Frequently Asked Questions (FAQ)
Yes, soil investigation is mandatory in Singapore for any construction project involving foundations, tunnel or earthworks. It is a legal requirement under the Building Control Regulations by Building and Construction Authority (BCA).
A soil investigation identifies the subsurface conditions for a construction project to ensure the foundation’s stability, safety and durability. This is crucial for designing a foundation that can properly support the structure, preventing future issues like foundation failure (settlement, cracking), project delays, and unnecessary costs.
By investing in a professional soil investigation in Singapore, you gain confidence that your project is safe, efficient, and built to last.
On average, most soil investigation field work in Singapore can be completed within 1 week onsite for one borehole. The duration of a soil investigation depends on the project size, soil, site, weather conditions and number of boreholes required.
The entire process — from initial planning to the final report, includes on-site field work and laboratory testing which can be more time-intensive. Factors such as weather conditions, local soil characteristics, and permit approvals from the relevant authorities can also influence the overall timeline.
During a typical soil investigation, boreholes are drilled to specified depths to obtain undisturbed soil samples for laboratory analysis. In-situ tests such as the Standard Penetration Test (SPT) are also carried out on-site to provide immediate data on soil resistance and strength characteristics.
Soil investigation services in Singapore are essential for building developers, contractors, architects, and structural engineers who are planning to construct any new structure — from small houses to large-scale infrastructure projects. These services ensure compliance with BCA safety and stability requirements, reduce construction risks, provide cost-effective solutions, and help achieve a secure and reliable foundation.
The soil investigation work is carefully planned to minimise disruption.
After completing the investigation, all boreholes are properly reinstated (sealed) and the surface is restored. Our team takes every effort to return the area as close as possible to its original condition, ensuring the site remains safe and tidy.
The number of boreholes required depends on the project’s size, height and complexity.
Refer to BCA website for more information or click here.
- Ensure Structural Stability
- Prevent Unexpected Costs
- Supports Regulatory Compliance
Ideally, soil investigation should be conducted at the earliest stages of a project, during the planning and design phases before construction begins. This allows structural and geotechnical engineers to work with accurate parameters, minimising design changes and ensuring regulatory submissions proceed smoothly.
The cost varies widely, including but not limited to project size, borehole quantity, topography and tests required.
Contact us with your project address and details. We’ll advise on the recommended scope, number of boreholes (if required), and provide a quotation.