Grey Structure vs Turnkey: What You're Actually Paying For

If you've collected a few construction quotes for the "same" house and found them wildly different, the most common reason isn't that someone is overcharging — it's that the quotes cover different scopes entirely.

Grey structure

This is the building's skeleton: foundation, walls, columns, beams, roof slab, and basic plumbing/electrical rough-in (pipes and conduits in the walls, before fixtures). No plaster finish, no paint, no tiles, no doors, no fittings. A grey structure quote gets you a weatherproof shell you could theoretically live in with camping furniture, nothing more.

Turnkey

Turnkey means genuinely move-in ready: plaster, paint, flooring/tiling, doors and windows, electrical fixtures and switches, sanitary fittings, kitchen cabinetry — everything finished. "Economy," "mid-range," and "premium" turnkey tiers differ mainly in the quality and brand of finishing materials, not the scope of what's included.

Why this matters when comparing quotes

A grey-structure quote and a turnkey quote for the identical house can differ by roughly 2-3x per square foot — not because one builder is dishonest, but because they're pricing completely different amounts of work. Before comparing any two quotes, confirm exactly which of the two scopes (or something in between) each one covers.

Where most budget overruns actually happen

Finishing, not structure, is where costs most often run over budget — because finishing choices are the ones you keep changing your mind about mid-project (a different tile, a better fixture, an upgraded kitchen). The structure, once built, is fixed; the finishing budget is where flexibility (and overspend) lives.

Run your own numbers, by tier, on our construction cost calculator — it shows the low/likely/high range and material vs labour split for each tier separately, so you can see exactly where a grey-structure budget ends and a turnkey one begins.

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