When an FDI client (Korean, Japanese, Singaporean) prepares a new office fit-out — whether a floor in a Grade A office tower like Bitexco or an operations area inside an industrial park (IP) — the first question is usually not “what should the design look like” but “how should delivery be organised”. There are two main routes, and this choice affects the schedule, the budget and the stress level of the whole project more than almost any other decision.

This article is a straight comparison of the two models — turnkey Design & Build (design + construction under a single General Contractor) and separate design + competitive construction tender — so you can choose the right one for your context.

How do the two models differ?

Model 1: Separate design + competitive construction tender

The client hires a design house to produce the concept, the technical documentation and the itemised quantity take-off. That package is then issued to 3–5 construction contractors for bidding; the best price wins and a construction contract is signed.

This is the classic design-bid-build model: transparent on price competition, and a good fit for organisations with an in-house project management (PM) team strong enough to coordinate two independent contractors.

Model 2: Turnkey Design & Build (single General Contractor)

A single firm is responsible for both design and construction. The client signs one contract and works with one point of contact from concept to handover. The General Contractor (GC) and quality control (QC) roles stay in-house within that one firm; specialist packages such as MEP (mechanical, electrical and plumbing) and fire safety (PCCC) are executed by licensed specialist partners, but the GC remains the single party accountable to the client.

Comparing the two models on 4 axes that matter

Schedule

With the separate-tender model there is a dead gap between design completion and contractor selection — tendering, clarifications and negotiation typically take several weeks to several months. If the design documentation lacks detail, the builder keeps going back to the designer with questions, stretching the timeline further.

Design & Build allows phase overlap (fast-tracking): while the design team is still finalising technical details for zone A, the construction team is already procuring materials and starting zone B. This is why FDI corporations with hard opening deadlines (set by group financial calendars) usually lean towards turnkey.

Accountability — the point FDI clients care about most

In the two-contractor model, when a defect appears — say a cracked gypsum ceiling, or an electrical system that does not match the drawings — the question “whose fault is it” quickly turns into a blame game: the designer says the builder built it wrong, the builder says the drawings were incomplete. The client stands in the middle, losing time as referee.

Design & Build removes that seam of responsibility. One party is accountable for both design and construction — there is no one else to blame. For FDI companies run under strict governance standards, a single point of accountability is a major value, worth trading away some pure price competition.

Cost and variation risk

This is where many clients get it wrong. A separate tender looks cheaper because of price competition. But the variation risk (scope-change cost creep) is higher: contractors bid low to win, then exploit unclear points in the design documentation to claim variations during construction. The final total cost often exceeds the original winning bid by a significant margin.

For reference, office fit-out costs in Vietnam typically fall into the following ranges (in million VND per m², excluding heavy MEP/fire-safety works and loose furniture):

  • Basic office in an industrial park / factory-building office: around 4–8M VND/m²
  • Standard corporate office: around 8–14M VND/m²
  • Premium office in a Grade A tower (such as the Bitexco area): from 14M VND/m² upward

These ranges depend heavily on the ceiling system, finish materials, MEP density and each building’s own fire-safety requirements — so treat them as reference figures, not a quotation. A real quotation is only accurate once an itemised quantity take-off is done on your specific documentation.

In the turnkey model with the price locked to the signed BOQ, the number on the contract is the number you pay — no surprise variations outside the agreed scope, and any change of scope becomes a transparent addendum agreed before work proceeds. You trade a little theoretical floor price for budget certainty. For FDI finance departments that need the budget locked from the start of the year, that certainty usually matters more than a few percentage points of savings on paper.

Coordination risk

A separate tender puts the coordination burden on the client or their PM: managing the interface between designer and builder, and between the builder and the MEP/fire-safety subcontractors. If the in-house team is thin — very common for FDI branches newly arrived in Vietnam — this is the most fragile point.

Why FDI clients tend towards Design & Build

Summing up, three reasons come back again and again:

  1. A single point of accountability — a fit with the governance culture of foreign corporations.
  2. Schedule certainty — meeting opening deadlines set by the group calendar.
  3. A budget that can be locked from the start — no surprise variations midway.

Beyond that, the language barrier is a practical factor: Korean, Japanese and Singaporean clients need bilingual Vietnamese–English documentation and contracts so legal and finance teams at head office can approve them. A General Contractor working bilingually removes considerable friction compared with coordinating two contractors who only speak Vietnamese.

Which model does AIC follow?

AIC operates on the turnkey Design & Build model — keeping the GC + QC roles in-house as a single point of contact (see our office fit-out service in detail). Specialist MEP and fire-safety (PCCC) acceptance packages are executed by licensed specialist partners, but General Contractor responsibility and quality control are never “outsourced” — AIC remains the party accountable to you.

A few practical points about how we work:

  • A bill of quantities (BOQ) with pricing within 4 hours of receiving complete input information — so you have a basis for a fast decision instead of waiting weeks.
  • Bilingual Vietnamese–English documentation and contracts — built for internal approval inside FDI corporations.
  • Price locked to the signed BOQ — no surprise variations outside the agreed scope; any change of scope becomes a transparent addendum agreed before work proceeds.
  • warranty of up to 24 months plus 3 scheduled maintenance visits (months 3, 6 and 9 after handover).

On production capacity: AIC runs two in-house workshops (1,200m² and 600m²) plus a 5-floor showroom, with 10 years in the trade (since 2016 under the predecessor Nhân Việt; AIC was founded in 2019). Nine of our clients are FDI enterprises. Delivered projects include East Minerals (office on the 34th floor of Bitexco Financial Tower), CMC, USOL, OH!SOME (Vincom), Droppii and King Coffee — covering both FDI clients and domestic brand chains.

For transparency: AIC does not hold ISO certification or any equivalent certificate. This is a fact we state upfront — if your tender criteria make such certification mandatory, it is a point to weigh candidly right at the contractor-selection stage.

Frequently asked questions

Is Design & Build always cheaper than a separate tender?

Not necessarily. A separate tender can produce a lower floor price through competition, but variation-driven cost creep often pushes the final total above the original winning bid. Design & Build with the price locked to the signed BOQ trades “cheap on paper” for budget certainty. Compare the expected total cost through to handover, not just the initial signed price.

What does an FDI office fit-out typically cost?

It depends on the tier: a basic office in an industrial park runs around 4–8M VND/m², a standard corporate office around 8–14M VND/m², and a premium office in a Grade A tower from 14M VND/m² upward. These are reference ranges — the real figure depends on the ceiling system, materials, MEP density and each building’s fire-safety requirements, and is only fixed after an itemised quantity take-off on your specific documentation.

If MEP and PCCC go through partners, who is responsible when something goes wrong?

In AIC’s turnkey model, even though MEP and fire-safety (PCCC) works are executed by licensed specialist partners, the General Contractor (GC) and quality control (QC) roles stay with AIC. You work with a single accountable point of contact, rather than coordinating multiple contractors yourself or refereeing when an issue arises.

When should you choose a separate construction tender instead of turnkey?

When your organisation has a strong in-house project management team, time to coordinate, and prioritises optimising the floor price through competitive bidding over speed and certainty. Conversely, if the deadline is hard, the in-house team is thin, and the budget must be locked from the start — turnkey Design & Build is usually the better fit for an FDI context.