Building Decarbonisation Projects at Williamson Park, The Storey and City Lab

Phase 1 – Pre-Construction Services (RIBA Stage 4)

The initial appointment will be for the pre-construction services, which encompass the

completion of RIBA Stage 4 (Technical Design). The contractor will be responsible for

providing detailed input on the buildability of the design, collaborating with the design team

to ensure constructability, and contributing to cost estimation, planning, and risk

identification during this phase.

Key Responsibilities for RIBA Stage 4:

• Provide buildability input to ensure the design can be practically constructed and meets the

required performance specifications.

• Assist with detailed cost estimation, including providing open book pricing.
• Contribute to risk management by identifying potential risks and proposing mitigation

strategies.

• Review and validate the design to confirm that it aligns with project requirements and is

feasible for construction.

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Phase 2 – Construction Works (RIBA Stage 5 and 6)

The ITT also includes the potential for the appointed Contractor to undertake the

construction works, which cover RIBA Stage 5 (Construction) and RIBA Stage 6 (Handover

and Close Out). However, the appointment for these stages is not guaranteed at this point.

Upon the completion of RIBA Stage 4, a formal review will be conducted to assess the

Contractor’s performance and the project’s requirements.

The Council reserves the right to proceed with the contractor for the construction works,

subject to satisfactory performance during RIBA Stage 4, confirmation of costs, and overall

project alignment. A break clause will be in place, allowing the Council to either proceed with

the appointed Contractor or re-tender for the construction works.

The Council retains Intellectual Property over full design work specific to the sites of this

project for use with another contractor if required.

Key Points for RIBA Stage 5 and 6:

• The ITT outlines the requirements for both pre-construction services and potential

construction works, but the contractor is only guaranteed the work for RIBA Stage 4.

• Following the completion of RIBA Stage 4, the Council will review whether to appoint the

contractor for RIBA Stage 5 and 6 based on performance, costs, and other considerations.

The main contract is subject to obtaining all necessary planning consents. The responsibility

for securing these consents will primarily rest with the Council. However, the appointed

contractor will be expected to provide technical support and relevant information as

required during the planning process.

The contractor must be aware that no construction works, particularly any equipment

ordering or significant on-site activities, can commence until all planning permissions are

secured. The timeline for the project may be extended if planning approvals are delayed.

Coordination with external parties, may also impact the timing of planning approvals and

should be factored into the project delivery plan.

The project is partially funded through the Public Sector Decarbonisation Scheme (PSDS),

and the key funding condition is that the project must be fully delivered, reach Practical

Completion (PC), and be signed off by the end of January 2026. This is the final deadline for

the project, and all works must be completed, tested, commissioned, and handed over

before this date to ensure compliance with funding requirements.

While an initial target of December 2025 has been identified for completion, this is flexible to

avoid unnecessary risk. The Council prefers to extend the timeline if required to ensure

quality and performance, rather than rush delivery.