Turnkey EPC
Turnkey EPC is a delivery model in which one contractor takes single-point responsibility for engineering, procurement and construction, and hands over a completed, commissioned facility — the client "turns the key". In MEPF it also usually means the contractor files the statutory approvals.
Why it matters on an MEPF project
The value of turnkey is not the single invoice; it is that every hand-off — survey to design, design to approvals, procurement to installation, installation to testing — sits inside one contract, so no interface is the item nobody priced. On a multi-vendor project each of those arrows is a contract boundary and, contractually, often nobody is answerable for a slip at it.
The cost of turnkey is dependence on one vendor's capacity and the reduced visibility of per-trade rates. It suits new builds, expansions, approvals-heavy scopes, tight programmes and clients without an in-house MEP manager; a single-trade retrofit or a very large project with a full-time PMC can do as well with specialists.
How it's specified in practice
| Parameter | Typical / working position | Governing reference |
|---|---|---|
| Front end | Survey, design, engineering, BOQ, estimate | Design basis to NBC / CEA / IS |
| Approvals | Fire NOC, CEIG, DISCOM, pollution-board consents | State acts and regulations |
| Build | Procurement, vendor coordination, installation | Approved makes; type-tested equipment |
| Close-out | Testing, commissioning, documentation, handover, AMC | Test records against design values |
Common mistakes
- Awarding turnkey on an incomplete BOQ and discovering the scope in variations.
- Splitting trades to save money, then paying in coordination failures.
- Treating commissioning as a day rather than a phase.
- Accepting handover without as-builts, test certificates and the approvals file.
Related on this site
Frequently asked
Does turnkey EPC include statutory approvals?
It should say so. In MEPF the drawings the authorities approve are the contractor's, so the contractor is best placed to file them — but the contract has to name the approvals and the applicant, and the statutory fees are usually outside the price.
When is turnkey the wrong choice?
A single-trade retrofit under an existing consultant's design, a site with framework vendors already in place, or a very large project with a full-time PMC to run the interfaces — there, separate specialists can be the better fit.
Standards referenced: Contract form (lump-sum / item-rate) · NBC 2016 · CEA (Safety) Regulations 2023