Can I use the NEC3 PSSC for the appointment of an architect on a construction project (circa £10m)?
Yes, it can be.
However, if you were appointing the architect to lead up contractually a profesional team of say structural engineer, mechanical and electrical engineer, quantity surveyor, project management adviser, Supervisor once construction starts etc i.e. they are subconsultants to the architect then, at this value, I would probably use the full Professional Services Contract (PSC) for all but the simpler types of buildings.
However, if you were appointing the architect to solely do architect duties and then the Project Manager’s role under the Engineering and Construction Contract, I would lean much more towards using the Professional Services Short Contract (PSSC), which I would also use for the other individual professional appointments.