CostBuildrGrey Structure Cost Estimation Guide
Grey structure is the skeleton of your house—everything from the foundation to the roof slab, including walls, columns, beams, stairs, and rough plumbing/electrical conduits. It does not include plaster, paint, tiles, fixtures, or any finishing work. Knowing what falls under grey structure helps you negotiate contractor rates and avoid disputes later.
What Grey Structure Includes
Grey structure covers excavation, foundation (footings, DPC, plinth), brick or block walls, RCC columns and beams, roof and floor slabs, staircase structure, parapet walls, and rough-in for plumbing pipes, electrical conduits, and drainage lines. It also includes curing of concrete elements.
The structure is considered 'grey' because it remains unfinished—bare concrete and exposed brick—ready for the finishing phase. Steel and cement are the two biggest material costs, together representing about 50–55% of the total grey structure expenditure.
Typical Cost Percentages Within Grey Structure
Within the grey structure budget, foundation work typically takes 18–22%, walls account for 20–25%, roof slabs consume 25–30%, and plumbing/electrical rough-in takes 10–12%. The remaining 8–12% goes to miscellaneous items like scaffolding, formwork (shuttering), water supply for curing, and contractor overhead.
For more granular budgeting, estimate each room independently. A standard 12×14 ft bedroom requires roughly 56 sq ft of slab, 52 running feet of 9-inch wall, one window opening, and one door opening. Each bathroom adds plumbing rough-in costs of PKR 25,000–40,000. Summing room-level estimates helps cross-check your contractor's lump-sum quote.
How to Reduce Grey Structure Cost
Use load-bearing wall construction instead of a full frame structure for houses up to two stories—this eliminates most columns and beams, saving 10–15% on grey structure. Optimize room sizes to standard brick module dimensions (multiples of 9 inches) to reduce brick cutting waste.
Choose a simple rectangular footprint; L-shaped or irregular plans increase foundation and slab formwork costs. Buy steel and cement in bulk at the start of the project when you can lock in prices—these two materials alone account for over half of your grey structure bill.
Частые вопросы
Does grey structure include plumbing and electrical?
Grey structure includes only the rough-in—empty conduit pipes embedded in walls and slabs for wiring, and basic drain/supply pipe layout. Actual fixtures, wires, switches, and sanitary fittings are part of the finishing phase.
How long does grey structure take to complete?
For a typical 5–10 marla house, grey structure takes 3–5 months depending on weather, labor availability, and design complexity. Allow at least 21 days of curing time for the roof slab before removing shuttering.
What is the grey structure cost per square foot?
In 2024–2025, grey structure costs approximately PKR 2,500–3,500 per square foot of covered area in Pakistan, depending on city, number of stories, and soil conditions requiring deeper foundations.