Soakaway problems in Lagos: what you need to know
Soakaway and septic tank issues are one of the most unpleasant and costly home problems in Lagos. Most homeowners only notice a problem when it is already serious.
Warning signs your soakaway needs attention
- Drains are slow throughout the entire house (not just one point)
- Gurgling sounds from toilet or sinks
- Bad smell from drains, especially in the morning
- Pooling water in the yard or garden
- Toilet water rising and draining slowly
If you see more than two of these, your soakaway is likely full or blocked.
Soakaway emptying costs in Lagos (2026)
| Tank Size | Emptying Cost |
|---|---|
| Small (residential, 1,000-2,000L) | N20,000 - N40,000 |
| Medium (3,000-5,000L) | N35,000 - N60,000 |
| Large (above 5,000L) | N60,000 - N120,000 |
Costs vary based on access (how close the vacuum truck can get) and distance from the disposal site.
How often should you empty your soakaway?
Every 1-3 years for a typical Lagos household. High-occupancy buildings (blocks of flats) may need emptying annually.
Building a new soakaway in Lagos
If your soakaway is damaged or too small for your building, a new one can be excavated and built. Expect to pay N80,000-N250,000 for a standard residential soakaway, including excavation, rings, and connection.