Introduction

The construction of a cesspool or septic tank is one of the most important stages for residences and holiday homes that are not connected to the sewage network. A properly designed and constructed system ensures hygiene, safety, and proper operation for many years. In the following guide, we present the types of cesspools/septic tanks, the materials required, the construction process, and the cost in Greece.

1. Types of Cesspools & Septic Tanks in Greece

1.1 Absorbent Cesspool (Soakaway)

The most common type, allowing the absorption of wastewater into the ground.

• Suitable for: Holiday homes, residences in areas with good soil drainage.

• Pros: Low cost, simple construction.

• Cons: Not allowed everywhere due to regulations.

1.2 Watertight Septic Tank (Sealed)

Completely closed and impermeable.

• Suitable for: Residences where the soil or legislation does not allow absorption.

• Pros: Absolute sealing, no leakage into the environment.

• Cons: More frequent emptying required, thus higher maintenance costs.

1.3 Two-Chamber / Three-Chamber System (Sedimentation System)

The first chamber holds solids, the second serves as an absorption or further treatment space.

• Pros: Longer lifespan and better sedimentation.

• Cons: Requires more space.

2. How a Cesspool is Constructed

The basic process includes:

2.1 Excavation to the required depth

Depending on the type and capacity.

2.2 Installation of Cesspool Rings

Usually made of reinforced concrete (high-strength concrete) for maximum durability.
The rings ensure:

• Stability.

• Proper insulation.

• Resistance to pressure.

• Easy access to the interior.

2.3 Waterproofing (for watertight tanks)

With special mortars, asphalt coatings, or cement-based sealants.

2.4 Lids and Manholes

For cleaning, ventilation, and easy access.

3. Cost of Cesspool Construction in Greece

The cost depends on:

• Type of system (watertight / absorbent).

• Capacity (cubic meters).

• Excavation depth.

• Soil type.

• Price of rings and lids.

• Transport and labor costs.

Indicative prices:

• Absorbent cesspool: 500€ – 1,200€

• Watertight septic tank: 800€ – 2,000€

• Two/Three-chamber system: 1,200€ – 2,800€+

Prices vary significantly by region and access difficulty.

4. Maintenance – What to Watch Out For

✔ Regular cleaning & emptying: Prevents overflow and bad odors.
✔ Do not throw trash or chemicals inside: They destroy the sedimentation system.
✔ Monitor water level: If it rises too quickly, there may be an absorption problem.
✔ Check for watertightness: To avoid cracks and leaks.

5. What to Check Before Building

• Local legislation.

• Distance from neighboring properties.

• Distance from wells or water tables.

• Proper location selection on the plot.

• Sufficient access for the sewage truck.

• Selection of quality rings for maximum lifespan.

Conclusion

The correct choice and construction of a cesspool ensures safety, hygiene, and smooth operation for years. By using quality materials — especially the rings — and choosing experienced professionals, you avoid problems and unnecessary expenses in the future.