Main Floor & Footing Elevation Surveys
A Main Floor Elevation Survey measures the height of the main floor of the building under construction to ensure that it has been built to the correct height. This survey should be completed as the floor joists and main floor sheeting are being put down.
A Footing Elevation Survey measures the height of the footing — the concrete outline upon which basement walls are poured. This survey is completed very early in the construction state.
Depending upon the age of the neighbourhood, the local municipal bylaws and whether this is new construction or a renovation, either the Main Floor Survey or the Footing Elevation Survey will be required, not both.
These surveys are particularly important as a structure built too low may have sewage issues (e.g. it won't drain properly). Structures that are too high look out of place relative to their neighbours additionally they may violate the maximum height allowed for a structure. Each municipality sets its own tolerance for how high or low a structure may be relative to the approved Development Permit and Plot Plan.
When completed Axiom Geomatics will provide a Main Floor Elevation Certificate indicating that the survey's completeness and findings.
What happens if my main floor is too high?
If the structure exceeds the maximum height the roof may need to be re-archited to be flatter. In most cases the builder is able to remediate the existing structure so it is within acceptable tolerance levels, however this varies on a case-by-case basis.
What happens if my main floor is too low?
Too low may cause conflicts with water/sewer/gas/electrical lines that go under the foundation. In most cases the builder is able to remediate the existing structure so it is within acceptable tolerance levels, however this varies on a case-by-case basis.
Do I need a Main Floor or Footing Elevation Survey?
This depends on which municipality you live in.