Grey Structure vs Turnkey: Where Construction Budgets Actually Go
Two quotes for the same house can look wildly different if one covers only the grey structure and the other is turnkey. Here's how to compare them properly.
"Grey structure" refers to a building's foundation, structural frame, roofing and brickwork — the shell of the house without any finishing work. "Turnkey" refers to a complete build, ready to move into, including flooring, paint, kitchen fittings, bathroom fixtures, doors, electrical fittings and final touches. The difference between the two isn't cosmetic — it typically represents a large share of total project cost, so it's essential to know which one a quoted rate actually covers.
As a rough illustrative pattern (actual rates vary by contractor, material choices and market conditions, and should always be confirmed directly rather than assumed), grey structure work tends to represent roughly 55–65% of a turnkey build's total cost, with finishing, fixtures and fittings making up the remainder. This means a per-square-foot grey structure rate can look deceptively affordable if a buyer mistakenly compares it against a turnkey rate from a different contractor.
Quality tier — commonly described as Standard, Premium or Luxury — affects both grey structure and finishing costs, but tends to affect finishing costs more sharply. The difference between standard and luxury structural work (steel grade, cement quality, foundation depth) is real but proportionally smaller than the difference between standard tile-and-paint finishing and imported marble, custom joinery and designer fixtures.
When comparing quotes from different contractors, always ask for a written breakdown by category — structure, electrical, plumbing, finishes, fixtures — rather than accepting a single lump-sum per-square-foot figure. This makes it far easier to spot where one contractor is cutting costs (often electrical wiring gauge or plumbing pipe quality, which aren't visible after walls are finished) compared to another.
Finally, budget a contingency of roughly 8–12% above any quoted figure for a full build, regardless of contractor. Material price fluctuations, minor design changes mid-construction, and unforeseen site conditions (particularly on sloped or hill-region plots) are common enough that treating the initial quote as a hard ceiling tends to create friction later in the project.