Custom homes are not built the day the foundation is poured. Before the foundation is built, the construction site must undergo its own preparation.
Site preparation for custom homes can include clearing the site and building access, excavation and grading, construction site drainage, and site preparation for construction of the foundation.
These all need to be done correctly because the structure built after is dependent on the preparation of the site. It is helpful for Vancouver-area build site clients to know the site preparation process before the construction of the foundation.
What Is Site Preparation for Custom Homes?
Site preparation is the work necessary to transform an existing property into a construction site.
Each property varies at the outset.
One property may be essentially an empty, flat lot. Another may contain an older property that needs removal. A North Shore property may have steep, rocky, wooded, inaccessible, or even an adverse drainage situation.
Therefore, site preparation for custom homes has to be estate specific and be based on the construction plans.
Capilano Earthworks prepares sites for construction in accordance with the needs of the project and the site conditions.
Before Excavation Begins Custom Homes Are Reviewed
Excavation equipment should not show up to the site to dig without advance planning.
Contractors must familiarize themselves with the site.
Reviewing Construction Plans
Approved architectural and engineering plans provide important details about the proposed home.
The excavation crew must engage the plans and specifications to prepare the site in accordance to the intended construction.
This may include a review of:
Careful review at this point in the process may prevent unnecessary excavation.
Understanding Site Conditions
What is already there may be as important as what will go there.
Changes in soil type, rock type, slope and intercepting site elements such as structures, vegetation, access and neighbouring and nearby structures and buildings, may affect site preparation.
Site conditions on Vancouver may be very different from nearby site conditions on the North Shore.
Clearing the Construction Area
The proposed construction area must be cleared.
Depending on the site, clearing may involve removing vegetation, junk and debris, unwanted landscaping and material, and other physical barriers.
Existing Structures
Demolition of an existing structure is required if a custom home is to be constructed.
The removal of an existing structure is only part of the preparation for new construction.
The old material must be removed and the site is prepared for the new foundation.
Capilano Earthworks can offer both excavation and demolition services, helping maintain the consistency of the early stages of construction.
Construction Access is Established
An excavator needs space to operate, and so do the haul trucks. 11 This can be easy to manage on agricultural property. However, it is more challenging on a residential project.
Why Access is Important
Access concerns:
In residential areas, established neighborhoods have surrounding homes, landscaping, fences and other site elements that restrict access.
A contractor must evaluate how the site can accommodate the movement of materials and equipment without causing unnecessary disturbance.
Foundation Excavation
Following site preparation and site layout, foundation excavation of the home can be initiated.
This is the first step of the project that begins to make the planned construction visible on the property.
Excavation to Specified Depth and Dimensions
Foundation excavation must be in accordance with the construction specifications.
Dimensions and depth of the excavation fit within the work area of the foundation contractor.
Over-excessive excavation results in an excess of work and unplanned additional materials, while under-excavation can result in delaying the next step of the project.
Accuracy in excavation ensures a smooth project flow with minimal delays.
Unexpected Ground Conditions
Not everything that lies beneath the surface is predictable.
Excavation may result in encountering rocks, poor material, water, old, unused construction materials, and other obstacles.
Experienced excavation contractors have to identify certain conditions and determine the correct next actions in collaboration with the relevant project professionals when needed.
Soil and excavated material have to be managed.
Excavating a custom-home foundation involves a lot of material that has to be removed. Some soil may be usable on the site, but other material needs to be hauled off-site.
Material management should be balanced with excavation. The contractor has to think about temporary storage space, truck access, and the material that is needed for backfilling and grading.
Always thinking about drainage is essential due to the high rainfall and the potential drainage issues during and after construction in BC's coastal region.
During site preparation, you have to consider how drainage will impact:
The drainage system will depend on the site and the building design.
Excavating the soil clears the space and creates the elevation and openings that allow drainage systems to perform their planned functions.
Grading plays a huge role in where the water on the property flows to, how driveways access the property, how landscaping is planned, and how the finished home will relate to neighboring properties.
Grading is especially difficult on a sloped property.
Capilano Earthworks designs site grading plans with site specific considerations and project requirements in mind.
Good site preparation often involves excavation to allow for retaining wall structures.
These are important for providing usable space around a home and representing grade changes.
Retaining walls should be constructed according to their design. Erection of improvised retaining walls is to be avoided.
There will be some site preparation activities that must occur before the foundation is laid.
Most of the major site work will have already been conducted by the time the foundation contractor is ready to begin.
The site preparation must have been done according to the site plans and the construction sequence to the extent that the:
The complexity and uniqueness of custom built homes means that the construction sequence will vary.
There are many risks that can occur if site preparation is not done correctly.
Most of the construction defects that occur later on in the project can be attributed to faulty site preparation. For example, poorly prepared site grading can lead to issues with water drainage and negatively impact other steps of the construction process. Poor excavation can impact the foundation of the building.
The goal should always be so that site preparation is done only once, and appropriately.
Capilano Earthworks offers excavation and demolition services for all your residential construction needs, emphasizing quality work and attention to site conditions, project requirements, and flexible scheduling.
Custom home site preparation for 2026 is made easier with Capilano Earthworks’ excavation services, which should be engaged before any digging begins.
If you want to know what work Capilano Earthworks will be doing on your custom home site and what excavation and preparation works will be done on the site to help with the foundation of your custom home, give Capilano Earthworks a call.
Build your dream home with Capilano Earthworks.
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