Before even drawing the first wall, the true foundation of a real estate project is hidden... beneath your feet! Soil study, often overlooked, is nonetheless your best insurance against unpleasant surprises (cracks, settlements, extra costs). A glance at its cost, legal framework, and NOVINNTEC, an OPQIBI certified geotechnical study office with competitive rates and responsiveness appreciated by professionals and individuals alike.
Behind NOVINNTEC, there is a team of engineers passionate about geotechnics (yes, it exists!) who have opted for rigor: OPQIBI certification, ten-year guarantee, clean drilling equipment, and a tight schedule.
The result: a quality-price ratio that appeals to both the self-builder of their family home and the developer looking for solid files to submit to the town hall.
- Average deadlines: Respect for your deadlines.
- Coverage: national, thanks to the chaining of files and its own survey team, without additional travel expenses.
- Additional services: foundation sizing, concrete study, study of opening load-bearing walls, study of hatch opening, study of carpentry, structural diagnosis, crack diagnosis.
Building without knowing your ground is like setting sail without sonar. Geotechnical studies assess the nature of the subsoil (clay, sand, rock), its reaction to water and loads, and suggest suitable foundation solutions. This allows for:
- Avoiding structural disorders (cracks, slippage),
- Accurately sizing footings, rafts, or micropiles: thus controlling the concrete budget,
- Meeting the requirements of insurers and regulations (which we come back to).
The standard NF P 94-500 divides geotechnical engineering into five key missions:
G1 (Preliminary Study): basic reconnaissance, risk mapping, and general construction principles (PGC). Often required before the sale of land.
G2 (Design): more detailed, it is broken down into G2AVP (Preliminary Design) and then G2PRO (Project Design). This is where foundations are sized and major construction costs are estimated.
G3: assistance and monitoring during execution, verifying that the assumptions of G2 match the actual ground conditions.
G4: independent supervision for sensitive construction sites (high-rise buildings, industrial sites).
G5: diagnostics on existing structures, investigating the cause of a crack or subsidence.
It is impossible to provide a single rate (area, accessibility, depth of surveys greatly affect the cost), but here are some observed price ranges:
- Soil study G1 price: €600 – €2,000 incl. VAT.
- Soil study G2AVP rate: €1,500 – €3,500 incl. VAT for a single-family home, expect +20% if the project exceeds 150 m².
- Cost of soil study G2PRO: €2,500 – €5,000 incl. VAT, detailed report included.
- Soil study G3 / G4: quoted based on the duration of the project (account for 1% of the foundation budget).
- Soil study G5 price: €2,000 – €3,200 incl. VAT depending on the number of control drillings.
Quick tip: to quickly visualize your expense items, request a detailed soil study quote with a line item for investigations (drillings, penetrometer tests) and a line for sizing.
???? [soil study price](https://novinntec.fr/devis-pour-une-etude-de-sol/)
Since the ELAN law (January 1, 2020), the seller of a building plot located in a "swelling clays" risk area must provide a G1-PGC soil study annexed to the preliminary sales agreement. There's no way around it if your parcel is in the 48% of the territory classified as "medium or high hazard".
For the project owner initiating a construction project:
- G2AVP is required to obtain damage-work insurance.
- G2 becomes essential before filing for a permit in certain municipalities or for buildings subject to the RE2020.
- G3/G4 can be imposed by the technical control on special structures (community swimming pools, tertiary buildings in seismic zones, etc.).
1) Quick Brief & Quote. Fill out an online form, and an engineer will call back within 24 hours.
2) Field Investigations. Core drilling, pressuremeter testing, dynamic penetrometer. NOVINNTEC operates on all types of access and has equipment suitable for sites with limited access.
3) Lab Analyses. Unconfined compression test, Atterberg limits, Proctor test: depending on complexity.
4) Illustrated Report. In accordance with standard NF P 94-500, including: an explanation of soil-related risks, presentation of the conducted surveys, soil profiles, mechanical properties of the soil, information on adjacent structures and foundations, soil bearing capacity, the type of foundations to be implemented, and the required provisions.
Soil study and structural analysis are two essential steps in a construction project. Soil study determines the soil's bearing capacity and the type of foundations required, while structural analysis sizes the foundations (formwork plan, reinforcement, load transfer, etc.). NOVINNTEC has the capability to assist you with both soil study and structural analysis, significantly optimizing the cost of your studies and simplifying your project management by reducing the number of parties involved.
OPQIBI: This label certifies the technical skills and financial stability of the engineering firm.
Ten-Year Warranty: Covers for 10 years the consequences of hidden defects related to the foundations; it is only valid if the recommended construction solution is followed to the letter.
Soil study is not optional: it's the key to durable construction, a controlled budget, and a secure site. NOVINNTEC, with its technical rigor and competitive pricing, positions itself as a prime ally for all your missions, from simple G1 to execution monitoring G4. Before laying the first brick, start by looking beneath the surface: your future building will thank you!
Author Audrey on 21 September 2023
Real estate, vacation rentals : Apartment rental
Author Audrey on 11 December 2023
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