A survey that only captures width and height guarantees a variation order later. Here is the full list of what a competent survey records before a price is issued.
Most signage disputes trace back to a survey that recorded a dimension and nothing else.
A sign is fixed to a substrate, powered from a supply point, reached by a specific access method and approved under a specific framework. Any one of those four unknowns can change the cost after the order is placed. Recording them before quotation is considerably cheaper than discovering them on installation day.
Dimensions and setting out
Overall fascia width and height, the usable signage zone once the shopfront frame and any bulkhead are deducted, the centre line, and the levels of adjacent tenant signage the new sign must align with.
Substrate and fixing
What the sign is actually fixing into: blockwork, concrete, gypsum, ACP over a void, glazing frame or curtain wall. Each demands a different anchor. A survey that records "wall" is not a survey.
Electrical provision
Whether a supply point exists, where it terminates, its capacity, and whether it is switched or timed. Illuminated signage installed with no confirmed supply is a sign that does not light.
Access
Working height, ground conditions, whether a manlift can be positioned, whether the frontage is over a public footway, and what access windows the property or mall operator permits.
Approval context
Property ownership, landlord requirements, any tenant design manual in force, and the applicable framework for that sign type and location. Requirements vary by location, sign type, authority and property owner, and should be confirmed against current official guidance for every project.
Existing condition
Photographs of the frontage before any work begins, recording pre-existing damage. This protects both parties.