Preparing your lot before the foundation: 9 steps that prevent cost overruns

Construction · Published October 6, 2026 · 6 min read · By Groupe Nuvem

1. Check zoning and easements

Even before buying: permitted use (residential, recreational, agricultural), setbacks, shoreline protection strip (10 or 15 m), flood zones and wetlands. The certificate of location and the municipality (or the MRC for unorganized territories) answer within days. In Portneuf and Charlevoix, the shoreline strip and the agricultural zone (CPTAQ) are the two most common traps.

2. Get a soil study

The geotechnical study ($800 to $2,000) tells you the soil type, the depth of bedrock and the water table, and the bearing capacity. It dictates the foundation type, pile length and excavation method. For a cottage on piles, an on-site torque test is often enough; for a house with a basement, the full study is an investment that pays for itself with the first surprise avoided.

3. Survey and stake out

The land surveyor sets the building layout stakes according to the plan and setbacks. It is required for the permit in most municipalities and it is what keeps you from building 30 cm too close to the neighbour's line. Count $800 to $1,500 and two to three weeks of lead time in high season.

4. Get the permit

Plans, layout, soil study if required, septic system (if no sewer) and water supply: the complete file goes to the municipality. Average lead time: 2 to 6 weeks. Nuvem assembles the file with you; the permit is issued in the owner's name.

5. Plan site access

A concrete truck weighs 30 tonnes and an excavator on a float 40: the road must carry the load, with enough turning radius and a driveway entrance approved by the municipality or the Ministry of Transport (numbered road). A temporary crushed-stone road costs $2,000 to $8,000; finding out on pour day costs far more.

6. Clear and strip

Felling, stump removal and stripping of topsoil over the building footprint plus a 3 m working margin. Keep the topsoil in a pile for final landscaping. Preserve mature trees outside the excavation zone: they are valuable and stabilize the soil.

7. Manage water from the start

Watch where water flows in spring. Ditches, culverts, a 2% slope away from the foundation over at least 2 m, a French drain with gravity outlet or a sump: this is when it gets decided. In the clay soils of the Neuville and Donnacona plain as on the slopes of Lac-Beauport, drainage makes the difference between a dry basement and a damp one for life.

8. Plan the utilities

Hydro-Québec: connection request (overhead or underground) 8 to 12 weeks ahead; the pole or trench must be ready. Water: municipal supply or well (drilling $8,000 to $15,000). Wastewater: sewer or a septic system compliant with regulation Q-2, r.22 ($10,000 to $25,000 depending on soil). Telecom: an empty conduit from the street to the house costs $50 today and $2,000 later. Our electrical division coordinates the connection and the electrical service with construction.

9. Choose the right foundation

With the soil study, access and schedule in hand, the choice becomes obvious: concrete for a finished basement, helical piles for a cottage, an addition or a difficult lot. Our helical piles vs concrete comparison details the criteria and prices.

Typical schedule

A well-prepared lot means a foundation poured on schedule and a budget that holds. Entrust us with the foundation, or the whole new-home project: we build in the 28 municipalities of Portneuf, Quebec City, Côte-de-Beaupré and Charlevoix.