Greenhouse construction cost varies enormously based on frame material, covering, and climate control features — a basic bamboo-and-plastic tunnel and a steel-framed, ventilated structure of the same footprint can differ in cost by 5-10x. This calculator estimates total construction cost from your dimensions and the specific materials and systems you choose.
Base Structure Cost = Floor Area (Length × Width) × Cost per sq ft (based on Frame Type), then adjusted upward for covering material grade, and further increased for any ventilation or heating systems added. Height affects both material quantity and wind-load bracing requirements.
| Frame Type | Cost per sq ft (PKR) | Expected Lifespan |
|---|---|---|
| Bamboo/wood | 150-250 | 3-5 years |
| GI pipe | 300-450 | 10-15 years |
| Galvanized steel | 500-800 | 20+ years |
For a 30 ft × 96 ft (2,880 sq ft) GI pipe structure with polyethylene covering and natural ventilation, at PKR 375/sq ft base: Base cost = 2,880 × 375 = PKR 1,080,000. Adding a basic exhaust fan ventilation system (typically +8-12% of base cost) brings the total closer to PKR 1.2 million, before land preparation and irrigation infrastructure, which are usually budgeted separately.
GI pipe frames offer the best balance of cost and durability for most small commercial growers — roughly double the lifespan of bamboo at about 1.5-2x the cost, while galvanized steel is usually only justified for larger operations planning 15+ years of use.
Natural ventilation (roof vents, roll-up sides) adds relatively little — around 5-8% of base structure cost. Active systems like exhaust fans and evaporative cooling pads can add 15-30%, but are often necessary in hot climates to keep summer temperatures manageable.
Polyethylene film is cheaper upfront but needs replacement every 2-4 years due to UV degradation. Polycarbonate sheeting costs more initially but lasts 10+ years, making it the better long-term value for permanent structures despite the higher entry cost.
Taller structures (12+ feet at the gutter) cost more per square foot due to increased material and bracing needs, but they improve air circulation and temperature buffering — a worthwhile trade-off in hot climates even though it raises upfront cost.