Underground Water Tank Cost in Lahore – RCC, Plastic & Coated Options (2025)
Installing an underground water tank is a key part of home construction and renovation in Lahore. With rising water needs and society regulations, understanding underground water tank cost in Lahore is crucial for both homeowners and contractors. The market offers a full range of RCC (reinforced cement concrete), plastic, and fiber-coated water tanks, each with its own cost structure, maintenance needs, and durability profile. Knowing current rates per gallon and per square foot helps you make informed choices for capacity, materials, and waterproofing, ensuring your home meets all reliability and safety standards.
Why Is an Underground Water Tank Essential for Lahore Homes?
- Underground water tanks are mandatory for residential buildings over 3 marlas, as per LDA regulations.
- They ensure consistent water supply, protect against heat and contamination, and improve property value.
RCC, Plastic & Coated Tank Prices in Lahore
| Tank Type | Cost (PKR/gallon) | Cost for 1,500 Gallons | Cost (PKR/sq.ft) |
|---|---|---|---|
| RCC (Brick + Concrete) | 50 – 80 | 75,000 – 120,000 | 800 – 1,100 |
| RCC with Waterproofing | 80 – 100 | 110,000 – 150,000 | 1,000 – 1,250 |
| Fiber/Plastic | 100 – 150 | 150,000 – 200,000 | 1,200 – 1,400 |
- Add PKR 30,000–50,000 for excavation, steel shuttering, and manhole cover.
- Rates reflect finished price with basic waterproofing.
How to Calculate Water Tank Size and Cost
- 1 cubic foot = 7.48 US gallons.
- Base Area (sq.ft) = (Capacity in Gallons ÷ 7.48) ÷ Depth (ft)
- Example: For a 1,500-gallon tank (5 ft depth),
1,500 ÷ 7.48 = 200.5 cu.ft
200.5 ÷ 5 = 40.1 sq.ft
Ask for costs by both gallon and sq.ft rates to compare quotes easily.
Best Waterproofing for Underground Water Tanks in Lahore
| Waterproofing Type | Cost (PKR/sq.ft) | Benefit |
|---|---|---|
| Bitumen | 60 – 80 | Basic joint waterproofing |
| Crystalline (Sika) | 100 – 150 | Deep, long-term protection |
| Epoxy | 150 – 200 | Premium, chemical resistant |
- Crystalline is most recommended for RCC tanks in modern Lahore construction.
Recommended Water Tank Design by House Size
| House Size | Gallons Needed | Base Area (5ft deep) | Typical RCC Tank Cost (PKR) |
|---|---|---|---|
| 5 Marla | 800–1,000 | 21–27 sq.ft | 65,000 – 90,000 |
| 10 Marla | 1,200–1,500 | 32–40 sq.ft | 110,000 – 150,000 |
| 1 Kanal | 2,000–3,000 | 53–80 sq.ft | 200,000 – 300,000 |
- RCC tanks use 9″ brick walls and waterproof slabs for maximum durability.
- Plastic or fiber tanks are best for speed and low maintenance.
- Always ensure GI/UPVC pipes, water stops, and proper admixtures are included for RCC tanks.
RCC vs Plastic Water Tank Comparison – 2025
| Feature | RCC | Plastic/Fiber | RCC with Coating |
|---|---|---|---|
| Durability | 15+ years | Moderate | Highest |
| Upfront Cost | Moderate | Highest | High |
| Maintenance | Moderate | Low | Low |
| Install Speed | On-site, slower | Fast (prebuilt) | Moderate |
| Waterproofing | Needed | Built-in | Advanced coating |
FAQs
Q: Which waterproofing is best for underground tanks?
A: Crystalline is best for RCC tanks.
Q: Why compare per gallon and sq.ft rates?
A: This ensures fair pricing and avoids overcharging.
Q: Can plastic tanks be installed underground?
A: Yes, for shallow use, but RCC is preferred for large, permanent setups.
Conclusion & Action Steps
- RCC tank cost: PKR 800–1,100/sq.ft or 50–80/gallon (best longevity).
- Plastic/fiber tanks: PKR 1,200–1,400/sq.ft or 100–150/gallon (for quick setups).
- Use both capacity (gallon) and area (sq.ft) calculations for the best result.
- Always ensure a quality waterproofing solution for long service life.
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