What a turnkey construction contract should include
A turnkey arrangement works best when the responsibilities of the client and contractor are clearly documented. The objective is not simply to use the phrase “turnkey,” but to define exactly what is included in the final handover.
Scope and drawings
The agreement should identify the approved drawings, BOQ or specification schedule and the boundaries of the contractor’s scope. Any client-supplied material, specialist work, statutory fee or third-party consultant service should be listed separately.
Material specifications
Define brands, equivalent-substitution rules, allowances and the approval process for finishes. If a brand becomes unavailable, the process for choosing an equivalent should be documented. Where an allowance is used, record whether it covers supply only or supply and installation.
Milestones and programme
Major stages such as foundation, RCC, masonry, MEP, plaster, flooring, painting, interiors and handover should be part of the execution plan where relevant. The agreement should also explain dependencies such as approvals, client decisions, site access and payment milestones.
Variations and change control
Changes requested after the agreed scope should be documented with commercial and timeline impact before execution whenever practicable. A simple written variation register can prevent disputes about whether an item was included in the original price.
Quality checks and approvals
Define how samples, mock-ups, concealed services, waterproofing, reinforcement, finishes and snagging will be inspected or approved. Responsibility for consultant approvals and client sign-offs should be clear before those activities affect the programme.
Payments, retention and handover
Payment milestones, invoice requirements, retention if applicable, completion checks, snag closure, project records and warranty or defect-liability obligations should be stated clearly. The handover list can include approved drawings, test records, warranties, manuals and keys where relevant.
What to confirm before signing
Confirm inclusions, exclusions, taxes, authority fees, utility connections, temporary works, debris removal, external development, escalation rules and the process for delay or suspension. A detailed scope backed by drawings and specifications is more useful than a short “all-inclusive” description.