Two-chamber septic tank (10m3) in solid blockwork with RC cover, and soakaway: cost per unit in Nigeria
Net unit rate in Abuja, excluding overheads, profit and VAT
₦2,356,034per unit
Tender rate about ₦3,144,709 per unit with overheads, contingency, profit and VAT.
Price a BoQ with this rateAs at 15 October 2026, the net unit rate for two-chamber septic tank (10m3) in solid blockwork with RC cover, and soakaway is ₦2,356,034 per unit in Abuja: ₦1,830,704 materials, ₦252,830 labour and ₦272,500 plant. With overheads (7.5%), contingency (5%), profit (10%) and VAT (7.5%) the tender rate is about ₦3,144,709 per unit.
Rate build-up (Abuja, Oct 2026)
| Resource type | Resource | Quantity per unit | Waste | Rate | Cost |
|---|---|---|---|---|---|
| Material | 9" (225mm) solid block | 320 unit | 5% | ₦1,050 | ₦352,800 |
| Material | OPC 42.5 cement, 50kg bag - adopted market average | 45 bag | 3% | ₦12,000 | ₦556,200 |
| Material | Sharp sand, per tonne | 4 tonne | 8% | ₦6,500 | ₦28,080 |
| Material | Granite 3/4", per tonne | 5 tonne | 5% | ₦18,000 | ₦94,499 |
| Material | High-yield rebar 12-16mm, per tonne | 0.35 tonne | 5% | ₦1,050,000 | ₦385,875 |
| Material | Precast soakaway ring 1500mm dia | 4 unit | 2% | ₦75,000 | ₦306,000 |
| Material | 1"x12"x12' plank (formwork) | 15 length | 10% | ₦6,500 | ₦107,250 |
| Plant (days) | Hydraulic excavator 14t | 0.5 day | - | ₦545,000 | ₦272,500 |
| Labour (hours) | Mason / bricklayer | 40 h | - | ₦2,456 | ₦98,250 |
| Labour (hours) | Iron bender / steel fixer | 12 h | - | ₦2,456 | ₦29,475 |
| Labour (hours) | Carpenter (formwork & roof) | 12 h | - | ₦2,784 | ₦33,405 |
| Labour (hours) | Unskilled labourer | 80 h | - | ₦1,146 | ₦91,700 |
| Materials | ₦1,830,704 | ||||
| Labour | ₦252,830 | ||||
| Plant | ₦272,500 | ||||
| Net unit rate per unit | ₦2,356,034 |
Rate by location
Materials, labour and plant are adjusted separately with Buildocrat's location factors.
| Location | Net rate per unit | Tender rate incl. OH&P and VAT |
|---|---|---|
| Abuja (FCT) | ₦2,356,034 | ₦3,144,709 |
| Lagos | ₦2,499,728 | ₦3,336,504 |
| Port Harcourt | ₦2,511,649 | ₦3,352,415 |
| Ibadan | ₦2,200,308 | ₦2,936,854 |
| Osogbo (Osun) | ₦2,211,423 | ₦2,951,690 |
| Kano | ₦2,151,052 | ₦2,871,110 |
| Kaduna | ₦2,176,944 | ₦2,905,669 |
| Enugu | ₦2,263,404 | ₦3,021,071 |
| Benin City | ₦2,292,218 | ₦3,059,530 |
| Uyo | ₦2,381,206 | ₦3,178,307 |
| Jos | ₦2,200,701 | ₦2,937,379 |
| Riverine / creek site | ₦3,039,528 | ₦4,057,001 |
Related water & sewerage rates
- V01 HDPE PE100 SDR17 pipe 110mm laid and butt-fused in trench on sand bed₦10,487 per m
- V02 HDPE PE100 SDR17 pipe 160mm laid and butt-fused in trench on sand bed₦20,958 per m
- V03 HDPE PE100 SDR17 pipe 250mm laid and butt-fused in trench on sand bed₦50,583 per m
- V04 HDPE PE100 SDR17 pipe 400mm laid and butt-fused in trench on sand bed₦124,777 per m
- V05 Ductile iron pipe DN150 laid in trench on sand bed₦55,966 per m
- V06 Ductile iron pipe DN300 laid in trench on sand bed₦124,862 per m
- V07 uPVC sewer pipe 200mm laid on granular bed₦16,957 per m
- V08 DI gate valve DN150 installed in block chamber with cover₦842,811 per unit
- V09 Pillar fire hydrant with isolating valve installed₦1,734,182 per unit
- V10 Bulk water meter DN100 with 2 valves in chamber₦2,817,498 per unit
- V11 Domestic water connection 15mm with meter and stopcock₦71,610 per unit
- V12 Precast manhole 1200mm dia, 2m deep, with D400 cover₦854,353 per unit
- V14 GRP sectional water tank on steel base frame, installed₦382,232 per m³
- V15 Package sewage treatment plant 50m3/day installed on concrete base₦92,587,570 per unit
- V16 Submersible pump 5.5HP installed in borehole with riser and cable₦1,515,016 per unit
- V17 Rapid gravity filter media (graded sand) placed₦61,093 per m³
- V18 Butterfly valve DN300 installed₦1,328,876 per unit
Frequently asked questions
How much does two-chamber septic tank (10m3) in solid blockwork with RC cover, and soakaway cost per unit in Nigeria?
About ₦2,356,034 per unit net in Abuja as at 15 October 2026, or about ₦3,144,709 per unit as a tender rate including overheads, contingency, profit and VAT (Buildocrat Nigeria Construction Rate Book).
What is the rate in Lagos?
Applying Buildocrat's Lagos location factors, the net rate is about ₦2,499,728 per unit and the tender rate about ₦3,336,504 per unit.
What does the rate include?
Materials (1"x12"x12' plank (formwork), 9" (225mm) solid block, Granite 3/4", High-yield rebar 12-16mm, OPC 42.5 cement, Precast soakaway ring 1500mm dia) with waste allowances; labour (Carpenter (formwork & roof), Iron bender / steel fixer, Mason / bricklayer, Unskilled labourer) at all-in rates including feeding, transport, idle time and statutory costs; and plant (Hydraulic excavator 14t) including fuel and operator. Overheads, profit and VAT are excluded from the net rate.
How to cite: Buildocrat, Nigeria Construction Rate Book, https://rates.buildocrat.store/rates/v13-two-chamber-septic-tank-10m3-in-solid-blockwork-with-rc/, prices as at 15 October 2026.