How to Stake Out a Building Pad with a Total Station

Applies to: Topcon GT series, Trimble S series, Leica TS/MS series, Sokkia SRX series total stations

Building pad stakeout defines the horizontal position and finish elevation for every corner and critical point of a structure's footprint. Errors in pad stakeout propagate forward to every subsequent trade — form work, foundation, framing. A total station stakeout done correctly takes a half-day crew about two hours per building; done incorrectly, it generates RFIs and construction delays that cost multiples of that time. This guide walks through the complete stakeout workflow.

Step 1: Set Up on a Control Point and Orient the Instrument

Set up the total station over a primary control point using a tribrach and optical plummet. Center precisely (within 1mm of the monument) and level carefully. In the instrument's survey software (Topcon Magnet Field, Trimble Access, Leica Captivate), start a new job or open the existing project file containing the building pad design coordinates.

Perform a known-point setup: enter the occupied control point coordinates, then sight a second known control point and enter its coordinates as the backsight. The instrument will compute the orientation angle. Before staking anything, confirm the setup by sighting a third independent control point and comparing the instrument's computed coordinates against the published values. Residuals should be under 0.010m (10mm) horizontally. If residuals exceed this, re-level and re-orient before proceeding.

Step 2: Load the Design Points

Import the building pad corner coordinates into the data collector. Design coordinates are typically provided as a CSV or DXF file from the project engineer. Confirm coordinate system — the file's coordinate system must match the field control coordinate system. On State Plane projects, confirm the correct zone is active. On calibrated local coordinate systems, confirm the calibration file is loaded.

Review the design point list before staking. Confirm all corners are present and that the elevations look reasonable for the site grade. Building pad coordinates are typically at finish pad elevation — confirm whether the points represent subgrade, aggregate base, or finished floor elevation, as this affects how much cut/fill the grade stake will show.

Step 3: Stake the Building Corners

Select the first corner point in the stakeout routine. The data collector will display the horizontal distance and direction to move the prism pole. Direct the rodperson to position the prism at the design location. Most systems display go-left/go-right and go-forward/go-back arrows as the rodperson approaches the point.

When the prism is within 0.010m of the design position horizontally, mark the point. Drive a wood hub flush to the ground at the design location. Mark the hub with a nail or tack at the exact prism position. Write the point ID and design elevation on a grade lath and drive it adjacent to the hub. Mark cut or fill: if the design elevation is 1.200m above the existing ground at that point, write "FILL 1.200m" on the lath.

Repeat for all corners. On rectangular buildings, stake all four corners and verify the diagonal distances in the field match the design geometry within 15mm. Diagonal checks catch rotational errors that individual corner residuals can miss.

Step 4: Set Offset Stakes if Required

For building pads where the exact corners may be disturbed during grading, set offset hubs 1-3m outside the building footprint on each corner line. Offset stakes preserve the layout even after the original corner hubs are lost during earthwork. Record the offset distance and direction on the grade lath.

Step 5: Close on a Third Control Point

After completing stakeout, sight a third independent control point and record the closing residual. This verifies the instrument orientation did not drift during the layout (which can happen if the tripod settles or is bumped). Residuals under 0.015m are acceptable; larger residuals require review of staked points for potential re-staking.