Pre-Construction Services Agreement

How a PCSA fits into two-stage tendering

In a two-stage tender, the first stage selects a contractor based on overheads, programme, capability, and approach. The PCSA then engages that contractor through Stage 4 design — typically 2–6 months — to contribute to design development, advise on buildability, procure long-lead items, and develop a target price.

The PCSA is a commitment to engagement, not to construction. If at the end of the PCSA the parties cannot agree a target price, the relationship can end. In practice, once a PCSA is in place, the parties usually proceed to the main contract.

What services it covers

Typical PCSA services: design review and value engineering, buildability advice, sub-contractor sourcing and pre-qualification, long-lead item procurement, construction programme development, target cost development with the QS, risk register population, and site investigation if required.

The contractor is paid a fixed fee or time-based fee for the PCSA period, typically £30k–£300k depending on project scale. The fee is rolled into the main contract sum if the project proceeds.

Common pitfalls

• No clear scope of services. A PCSA without a defined scope can become "everything the client thinks of" — and the contractor either pads the fee or ends up doing too much for too little.
• No clear exit conditions. If at the end of the PCSA, target price cannot be agreed, what happens? The PCSA should specify whether the design IP transfers to another contractor, whether the existing fee is final, and what notice is required.
• Treating PCSA as a procurement shortcut. The PCSA is meant to develop design and price. Some clients use it to bypass competitive tender; this typically results in poor value because the contractor has no competitive pressure during stage 2.

Related

• What is a tender? →
• What is RIBA Stage 4? →
• What is a cost plan? →