Site surveys come in different forms depending on what stage your project is at and what you need to know. A topographical survey, for example, maps the contours, features and levels of your land — helping architects and engineers design appropriately around slopes, access points and neighbouring properties. A soil investigation can uncover whether foundations need to be deeper, wider or reinforced, which is critical to getting accurate build costs and complying with Building Control.

Boundary surveys are equally important, especially on the island where historic records can be inconsistent and neighbour disputes are best avoided. Many homeowners assume that an old hedge line or fence defines their ownership, but in reality the legal boundary could be several metres off. Getting this wrong can lead to tension, delays in approvals, or even enforced redesigns after work has begun.

Drainage is another major factor. Many plots on the Isle of Man, especially in rural areas, don’t connect to mains drainage and require soakaways or septic systems. The feasibility of those systems — including how the ground absorbs water and how close you are to watercourses — will affect both the design and the cost. A drainage survey can tell you whether your proposed solution is realistic, or if alternatives need to be considered.

The Isle of Man Government encourages developers to commission professional assessments early in the design process to reduce long-term risk. If you’re submitting plans to Building Control or the planning department, surveys provide evidence that the project is viable, and help demonstrate your compliance with relevant standards. More importantly, they reduce the chance of nasty surprises when you break ground.