Guide
How Foundation Repair Works
What actually happens when I get foundation work done?
The sequence is assessment, diagnosis, specification, quoting, permits where applicable, the work itself, and documentation. The step that most often gets skipped is diagnosis: a quote that names a repair without explaining what caused the problem is a price, not a plan. For anything structural, an engineer's specification before quoting is what lets you compare contractors on equal terms.
We are a referral service, not a contractor. Your request goes to an independent Calgary foundation company.
Published by Calgary Foundation Pros. Last updated August 16, 2026. This is general guidance for Calgary homeowners, not an engineering assessment of any specific property, and it is not a substitute for a professional engineer where one is warranted.
Foundation work is unusual among home repairs in that the diagnosis is frequently sold by the same party that sells the remedy. That is not automatically a problem, but it does mean it is worth understanding the process well enough to tell a thorough assessment from a sales visit.
Step 1: the assessment
A useful assessment looks at more than the crack. It should cover the foundation inside and out, the grading and drainage around the house, the condition of doors, windows and floors throughout, and any history of water, renovation or nearby excavation.
You should come away knowing what was observed and measured, not just what is being proposed.
- Crack locations, directions, widths and whether the faces are displaced
- Whether any wall is out of plumb, measured rather than estimated
- Floor elevations where settlement is suspected
- Grading, downspouts, window wells and any hard surfaces draining toward the house
- Evidence of past water: efflorescence, staining, previous repairs
- Whether monitoring is needed before deciding anything
Step 2: diagnosis, which is the part people skip
The single most useful question to ask is what caused this. A repair that addresses the crack without addressing the cause tends to produce a repeat, and the second repair is rarely cheaper than the first.
Be wary of any proposal that does not include an answer. It is also fair to ask what would happen if you did nothing for a year, because an honest assessor can answer that, and the answer is genuinely different for a stable vertical crack than for a bowing wall.
Step 3: when an engineer belongs in the process
For anything showing structural markers, an engineer's assessment before quoting is worth the delay. The reason is structural in a different sense: the party assessing the problem and the party selling the remedy should ideally not be the same one.
An engineer's report also converts a set of competing sales opinions into a single specification that quotes can be compared against, which usually saves more than the report costs. It is the document a future buyer's inspector will want to see too.
- Any horizontal crack in a basement wall
- Any crack where the faces are displaced
- Measurable ongoing movement
- Any proposal involving underpinning or piles
- Anything affecting how load travels through the building
Step 4: comparing quotes
Quotes for foundation work are notoriously hard to compare because contractors bundle differently. Two prices for the same wall can differ by a factor of three simply because one includes reinstatement and the other does not.
Get everything in writing and compare these line by line rather than comparing totals.
- Exactly what is being repaired, and over what length
- Which method, and why that one
- Whether drainage correction is included or excluded
- Whether excavation reinstatement, landscaping and hard surfaces are included
- Whether permits and engineering fees are inside or outside the price
- What the warranty covers, for how long, and whether it transfers on sale
- What happens if the repair does not resolve the problem
Step 5: permits and inspection
Structural work generally requires a permit, and permitted work is inspected. This is a protection rather than an obstacle: it produces a record that the work was done to a specification and checked by someone with no stake in the outcome.
Work done without required permits can complicate a future sale and can affect insurance. Ask directly whether a permit is required and who is responsible for obtaining it.
Step 6: what to keep afterward
Foundation repair documentation has real value at resale, because a buyer's inspector will find the evidence of past work and the alternative to documentation is speculation.
- The engineer's report and any stamped drawings
- The permit and the final inspection record
- The contractor's scope of work and final invoice
- The written warranty, and whether it transfers
- Photographs taken before, during and after
- Any monitoring records from before the repair
Questions people actually ask
How long does foundation repair take?
It depends entirely on the method. A single interior crack injection is usually a few hours in one visit. An interior drainage system typically runs a few days. Exterior excavation is a multi-day project, and underpinning or piling can take one to several weeks depending on the length of footing involved and the access available.
Do I need to move out during foundation repair?
Usually not. Most residential foundation work is carried out with the house occupied, including underpinning, which is sequenced specifically so the structure is never unsupported over a significant length. The affected area becomes unusable and the work is noisy and dusty, but the house generally remains habitable.
How do I compare foundation repair quotes fairly?
Compare scope rather than totals. Establish what is included for excavation reinstatement, drainage correction, permits, engineering and landscaping, since those are the items most often bundled by one contractor and excluded by another. The cleanest way is to get an engineer's specification first, then ask everyone to quote against it.
Does foundation work need a permit in Calgary?
Structural work generally does, and permitted work is inspected. Ask directly whether a permit is required for the proposed scope and who will obtain it, and keep the permit and final inspection record afterward. Unpermitted structural work can complicate resale and may affect insurance.
Want someone to look at your specific case?
General guidance only goes so far. Send a description and a postal code and it goes to an independent Calgary foundation contractor.
We are a referral service, not a contractor. Your request goes to an independent Calgary foundation company.