Survey Services for Main Contractors: Which Survey Output Do You Need?
This guide helps main contractors choose the right survey output for construction projects.
Survey Output Options for Main Contractors
Topographical survey — Existing site conditions for tender and design.
Measured building survey — Existing building drawings for conversion and extension.
Setting out — Position design on site during construction.
Monitoring surveys — Track structural movement during works.
As-built survey — Final dimensional record of completed works.
Choosing the Right Survey Output
Tender package — Topographic survey and measured building survey for competitive tendering.
Construction — Setting out and monitoring during works.
Completion — As-built survey for handover and snagging.
Which Survey Output to Choose as a Main Contractor
As a main contractor or construction company, the right survey output depends on the project stage and the specific need. The five survey output options are topographical survey (existing site conditions for tender and design — typically commissioned by the developer or the design team, with the contractor receiving the CAD pack as a reference for pricing and construction), measured building survey (existing building drawings for conversion and extension — typically commissioned by the developer or the design team, with the contractor receiving the CAD pack as a reference for pricing and construction), setting out (position design on site during construction — typically commissioned by the contractor for construction programme, with the surveyor transferring the design to ground with tolerances), monitoring surveys (track structural movement during works — typically commissioned by the contractor where the proposed works could affect a neighbouring building under the Party Wall etc. Act 1996, with trigger levels and reporting frequency), and as-built survey (final dimensional record of completed works — typically commissioned by the contractor for handover and snagging, with the deliverable issued as a final set of measured drawings for the O and M file). The three typical project stages where each output is used are tender package (topographical survey and measured building survey for competitive tendering — issued as a CAD pack with scope and scale), construction (setting out and monitoring during works — scheduled in line with the construction programme, with setting out at construction phases and monitoring at frequency), and completion (as-built survey for handover and snagging — issued as a final set of measured drawings for the O and M file). To commission a survey, send a brief covering the site address, the deliverable list, the deliverable format (DWG and PDF are standard; RVT and IFC for BIM projects; E57 for raw point cloud; CSV for monitoring readings; XLS for schedules), the coordinate system (OS National Grid with Ordnance Datum Newlyn heights is the UK convention), the deliverable scale, and the target turnaround. icelabz responds within twenty-four hours with a fixed-fee quote, and the on-site attendance is typically scheduled within five to ten working days of instruction. For projects where the surveyor needs access to active construction sites, the brief should set out the site induction, PPE, and signing-in requirements at quotation stage. A signed accuracy statement is the QA evidence for downstream design, setting out, and construction use, and all icelabz surveys are issued under the RICS Measured Surveys of Land, Buildings and Utilities standard (3rd edition).