Good evening everyone,
We are planning to purchase a plot of land in the HS district. It is not yet decided whether we will build with or without a basement.
I have requested soil investigation quotes from two companies. One offer is clearly more detailed and also more expensive. As a layperson, the main points seem to be:
Offer A:
- Two dynamic core drillings with a diameter of 36/50 mm (1.4/2 inches), including identification and description of the soil by the operator, drilling depths up to 5.0 m (16.4 ft)
- Ten soil sample collections, geological assessment of the bore material as well as organoleptically detectable contamination
- One dynamic probing of 5 m (16.4 ft) according to DIN EN ISO 22476-2
- Evaluation including recording of bore points, allowable soil bearing capacity, design groundwater level, foundation recommendation, waterproofing, bedding modulus
Offer B is much shorter in description but also less expensive:
- Site investigation including travel, two small dynamic drillings, tabular evaluation, and topographic site survey.
- Additionally, "light dynamic probing" can be booked for 100 euros each.
There is no information on depths or soil samples.
Could anyone help evaluate these two offers?
Thanks and best regards
We are planning to purchase a plot of land in the HS district. It is not yet decided whether we will build with or without a basement.
I have requested soil investigation quotes from two companies. One offer is clearly more detailed and also more expensive. As a layperson, the main points seem to be:
Offer A:
- Two dynamic core drillings with a diameter of 36/50 mm (1.4/2 inches), including identification and description of the soil by the operator, drilling depths up to 5.0 m (16.4 ft)
- Ten soil sample collections, geological assessment of the bore material as well as organoleptically detectable contamination
- One dynamic probing of 5 m (16.4 ft) according to DIN EN ISO 22476-2
- Evaluation including recording of bore points, allowable soil bearing capacity, design groundwater level, foundation recommendation, waterproofing, bedding modulus
Offer B is much shorter in description but also less expensive:
- Site investigation including travel, two small dynamic drillings, tabular evaluation, and topographic site survey.
- Additionally, "light dynamic probing" can be booked for 100 euros each.
There is no information on depths or soil samples.
Could anyone help evaluate these two offers?
Thanks and best regards
Hello, I’d like to join the discussion on this topic.
I’m building on a slope with a total height difference of about 15m (49 feet). The area where the house is located has a height difference of approximately 3.5m (11.5 feet).
I have received three quotes for a geotechnical site investigation. Two of them, as mentioned above, are 2+1 and 3+1 point tests and cost between €1450 and €1700. A third quote includes 8 dynamic cone penetration tests and 3 heavy dynamic probing tests, priced at around €3100.
I understand that I might have to spend a bit more on a site investigation when building on a slope, but is the last offer somewhat excessive, or is it the only reasonable one that provides a comprehensive examination?
Thank you very much in advance for your answers.
I’m building on a slope with a total height difference of about 15m (49 feet). The area where the house is located has a height difference of approximately 3.5m (11.5 feet).
I have received three quotes for a geotechnical site investigation. Two of them, as mentioned above, are 2+1 and 3+1 point tests and cost between €1450 and €1700. A third quote includes 8 dynamic cone penetration tests and 3 heavy dynamic probing tests, priced at around €3100.
I understand that I might have to spend a bit more on a site investigation when building on a slope, but is the last offer somewhat excessive, or is it the only reasonable one that provides a comprehensive examination?
Thank you very much in advance for your answers.
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