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Cost

How to estimate turnkey construction cost in 2026

A practical guide to converting floor area with foundation, roof and terrace coefficients to estimate the total cost of a townhouse.

The first question almost every homeowner asks is: “How much will my house cost?” The standard method in Vietnam is converted construction area × unit price per m² of the chosen package.

1. Converted construction area

Each element is multiplied by a coefficient relative to floor area:

Element Typical coefficient
Pad footing 30% of ground-floor area
Pile foundation (excl. piling) 40%
Strip footing 50%
Ground and upper floors 100%
Open roof terrace 50%
Reinforced-concrete roof 50%
Metal-sheet roof 30%
Tiled roof on steel truss 70%
Basement 150%

Example: a 5×20 m, three-storey townhouse with piles and a concrete roof:

  • Foundation: 100 m² × 40% = 40 m²
  • Three floors: 100 m² × 3 = 300 m²
  • Roof: 100 m² × 50% = 50 m²
  • Total: 390 m²

2. Multiply by the package rate

At the Turnkey Premium rate of 6,300,000 – 8,300,000 VND/m², the estimate is roughly 2.46 – 3.24 billion VND, depending on the finishes and amenities chosen. Try it with the GVG cost estimator.

3. What changes the final cost

  • Site access: narrow alleys, soft ground needing reinforcement
  • Architectural style: neoclassical detailing adds labour
  • Finishes and fixtures selected
  • Market prices of steel and cement

These figures are indicative. For an exact quote, GVG will survey your site and prepare a detailed estimate free of charge.

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