Cost and turnaround time


  • Established on a case-by-case basis. For example, in the Montréal area and its surrounding suburbs, a geotechnical investigation for soil bearing capacity can cost approximately $3,500 to $9,500 for “small” residential (single family to approximately triplex), commercial or industrial projects of up to 3 stories.

Turnaround time

  • Established on a case-by-case basis. The delivery times vary depending on possible fieldwork dates and the availability of our geotechnical team.

Questions? Appointment?

You can call us at 514 990-2063 or fill out the form below and we will contact you as soon as possible.

Quality and credibility

The geotechnical studies carried out by our specialists are prepared and/or supervised by an engineer in accordance with the National Building Code, the standards of the Canadian Foundation Engineering Manual and the Unified Soil Classification System (USCS). Our specialists have a quality management system for activities related to geotechnics (equipment, in situ tests, laboratory tests, etc.).

Multitest as well as these specialists are covered by errors and omissions liability insurance.

What is it about?

Generally, the purpose of a geotechnical investigation is to determine the properties of the soil and rock, as well as the local groundwater conditions, in order to establish the geotechnical parameters of the site and to make recommendations for the design and construction of the proposed works.

There are several types of geotechnical studies covering aspects such as soil bearing capacity, slope stability, septic system installation and materials testing. For more details, we invite you to consult the “LEARN MORE” section below.

Learn more about our geotechnical tests

Soil bearing capacity

This study is used to determine the characteristics and composition of the soil under a proposed or existing building. This test determines if the soils of the site under study are suitable to receive a load (a building in many cases).

Slope stability

This study is used to determine the characteristics of a slope in order to plan the location of a building or a proposed expansion. This test determines the areas at risk of landslides and may include the bearing capacity of the soil.For example, in the Montréal area and its surrounding suburbs, a geotechnical investigation for slope stability can cost approximately $10,000 to $13,000 for “small” residential (single family to approximately triplex), commercial or industrial projects of up to 3 stories.

Septic system installation

This study is used to determine the soil characteristics at the location of a proposed septic system (septic tank and leach field which is also called drain field or absorption bed). This plan is used by a contractor to complete the proper installation of a septic system and associated facilities.

Materials control and other tests

It is normally recommended to proceed to a qualitative control of the various stages of the construction in order to ensure the quality and the stability of a projected work. Multitest is able to carry out this aspect such as the inspection of the foundation soils before the concreting of the footings and the control of the backfilling, compacting, concreting, paving, etc.

Other tests are possible such as a short soil bearing capacity study, the control of the soil compaction with a nucleodensimeter, the quality and the resistance of the concrete (for example to check the state of the foundation walls of a building). Please contact us according to your needs.

FAQ on geotechnical studies

Is it mandatory?

For “small” buildings (maximum of 600 m2, i.e. approximately 6,500 ft2, and three stories), some municipalities may require geotechnical studies; this is often the case for:

  • Building extensions or new constructions located on the waterfront or on a mountainside;
  • Known areas with low soil bearing capacity;
  • Areas where significant backfill activity has occurred in the past;

Except for the situations mentioned above, for such “small” buildings, it is often at the discretion of the owner, but we strongly recommend it for any construction project to secure your investment and avoid unpleasant surprises.

For larger buildings, a geotechnical study is mandatory according to the National Building Code.

Garantie construction résidentielle (GCR) requires a geotechnical study for certain buildings, notably divided condominiums of more than 5 units. For more details, refer to section 87 of the Regulation respecting the guarantee plan for new residential buildings (chapter B-1.1, r. 8).

What type of equipment do you use?

The equipment chosen depends on several factors (type of test, type of building, regional soil types, etc.). For example, for soil bearing capacity, when possible, we use an excavator to minimize the cost of the study; however, some files require much more expensive drilling machinery (geotechnical drill rig).

How can i get the lowest possible price?

If you provide the equipment required for the surveys (test pits with an excavator or boring with a geotechnical drill rig, as recommended by our engineer), this can reduce the cost of our work. The type of equipment required is established on a case-by-case basis for each file and is confirmed before the contract is signed.

Will you determine the water table (groundwater level)?

This depends on the type of study. For the bearing capacity of the soil carried out with an excavator by way of test pits (also called trenching or exploration wells), the level of the water table, if it is not encountered during our work, will be estimated by the visual observations of the specialist in the test pits. In the case of a soil bearing capacity study carried out with a geotechnical drill rig, it will be measured with a water well(s) installed in any borehole done. Remember that the groundwater level varies during the year (mainly seasonally) and can therefore change.

Who uses this report?

It is used primarily by the designers of the proposed building (architects, structural engineers, civil engineers and builders); therefore, it is essential to ensure that a copy of the geotechnical study is forwarded to them as soon as possible, as the results can have a significant impact on aspects such as site preparation, type of foundation or location of a proposed building.

In the case of an existing building, this study is used by the expert conducting the investigation of the identified building problem.

What types of recommendations do the most common geotechnical studies offer?

  • Identification of geotechnical issues related to the project
  • Preparation of the site according to the construction project
  • Recommendations regarding the foundation: types of footings, raft foundation (slab serving as foundation), piles, etc.
  • Building drainage
  • Specific characteristics of commercial, industrial or institutional buildings
  • Temporary support structures (e.g. decontamination under a building or near the public domain; construction of a building with several underground levels or near the public domain) or permanent support structures (e.g. construction of a building with underground garages or of a retaining wall on a sloping ground)
  • The type of wastewater treatment system (septic installation) if applicable
  • The stability of a slope on the property (risk of destabilization)

Some testimonials from our clients

“Service worthy of note, courteous, prompt and simply genuine. My sincere congratulations to the entire team and good continued success!”

George Mardik, real estate broker │ Royal LePage Altitude │Google review, Greater Montréal

“Ultra professional and competent service. They took the time to listen to my situation and explain to me what applied to standards and show me the tests that could be done. There is no pressure to sell tests that you don’t need. You really feel like they’re looking to do what’s best for the customer without artificially inflating the bill.

In the construction industry, where we are often confronted with profiteering or downright dishonest individuals, this kind of service gives faith in humanity!”

Thanak, Google review, Greater Montréal

“I highly recommend Multitest. They took the time to give me good advice as I dealt with a delicate situation. I felt supported and 100% confident with this team. Rigor, efficiency in communications, respect for the estimate. A great experience.”

Daphné Caron, Google review, Greater Montréal

“I had to do a soil test quickly. The folks at Multitest gave me a competitive price the day after I called. The work was carried out cleanly, on time and for the price submitted. I am very happy with my experience with Multitest!”

Georges East, Montréal

“Many thanks for your excellent service and the speed of your results. I regularly refer Multitest to my clients and this file confirms once again why I recommend you.”

Stéphane Dufour, building inspector │ L’inspecteur Urbain – building consulting services

Main areas served by our geotechnical study experts

North Shore of Montreal

We serve the North Shore of Montreal, including Laval, Mascouche, Terrebonne, Mirabel, Saint-Jérôme, Le Gardeur, Deux-Montagnes, Saint-Eustache, Pointe-Calumet, Saint-Joseph-du-Lac, Sainte-Marthe-sur-le-Lac, Blainville, Boisbriand, Bois-des-Filion, Lorraine, Rosemère, Sainte-Anne-des-Plaines, Sainte-Thérèse, Charlemagne, L’Assomption, Repentigny, Saint-Sulpice and L’Épiphanie.

City of Montreal

We serve the greater city of Montreal, including the following boroughs: Ahuntsic-Cartierville, Anjou, Côte-des-Neiges–Notre-Dame-de-Grâce, Lachine, LaSalle, Le Plateau-Mont-Royal, Le Sud-Ouest, L’Île-Bizard–Sainte-Geneviève, Mercier–Hochelaga-Maisonneuve, Montréal-Nord, Outremont, Pierrefonds-Roxboro, Rivière-des-Prairies–Pointe-aux-Trembles, Rosemont–La Petite-Patrie, Saint-Laurent, Saint-Léonard, Verdun, Ville-Marie and Villeray–Saint-Michel–Parc-Extension.

South Shore of Montreal

We serve a large portion of Montérégie, including Longueuil, Greenfield Park, Saint-Hubert, Brossard, Belœil, Boucherville, Candiac, Carignan, Chambly, Châteauguay, Delson, La Prairie, McMasterville, Mont-Saint-Hilaire, Otterburn Park, Saint-Basile-le-Grand, Saint-Bruno-de-Montarville, Sainte-Catherine, Saint-Constant, Saint-Isidore, Sainte-Julie, Saint-Lambert, Saint-Philippe, Saint-Jean-sur-Richelieu and Varennes.