Software can look at a week of site photographs and tell you what appears to have changed. That is useful for management and dangerous as a basis for payment, because progress in Canadian construction is a certified position with legal consequences attached.
Key takeaways
The pitch is compelling: photograph the site, and know where the job actually is rather than where the last progress meeting said it was. The capability is real, the wording matters enormously, and the difference between a management tool and a payment tool is where firms get into trouble.
Read the documentation rather than the marketing. Procore's Analyze Photos with Assist describes its Progress Summary as a concise overview of visible work completed or ongoing in the selected images, generated from a selection of up to 40 images per gallery page, with the feature in open beta and the instruction to review the created content for accuracy. Its Project Progress Update starter agent extracts key progress updates from a daily log to create a concise, actionable summary for the project team.
Note what those descriptions carefully do not say. Neither claims a percentage. Neither claims a comparison to the schedule. Neither claims to see what is behind a wall. "Visible work completed or ongoing" is an accurate and modest description of what an image can support, and you should hold any vendor to the same standard.
A single photograph is weak evidence of progress. Two photographs of the same vantage point a week apart are much stronger, because the question becomes comparative rather than absolute: what is different. That is why the capture standard matters more than the model. Fixed vantage points, consistent times, consistent framing.
Used that way, photo analysis answers the questions that actually cause schedule slip. Has anything changed on the third floor in nine days. Did the north elevation scaffold come down when the schedule said it would. Are there materials sitting in the same place they were in three weeks ago. Those are prompts to ask a question, and they are worth a great deal to someone managing five sites from an office.
Concealed work. Mechanical and electrical rough-ins disappear behind drywall; waterproofing disappears under backfill; fireproofing disappears above ceilings. On most projects, the trades whose progress is hardest to verify visually are also the ones with the largest progress claims. A photo-based read will systematically under-see the work that matters most financially, and it will do so silently.
The second weakness is that visible does not mean complete. A wall that is up is not a wall that is inspected, taped, primed and accepted. Progress against a contract is a function of the schedule of values, not of what the camera can see, which is why Procore's schedule tool and the payment process live separately from the photo tool.
This is the part that turns a software question into a legal one. In Ontario, substantial performance under the Construction Act is a defined milestone that gets certified, and certification sets statutory clocks running — including the ones governing lien rights and holdback release. Our sister firm's explanation of substantial performance under Ontario's Construction Act sets out how that works, and its answer on construction lien deadlines in Ontario covers the timing consequences. Payment disputes that arise along the way may go to adjudication.
The statutory mechanics behind that certification are specific. Ontario’s Construction Act requires every payer to retain a holdback equal to 10 per cent of the value of services or materials actually supplied, held until the liens that could attach to it have expired, been satisfied or otherwise resolved. That holdback is not released casually either: following each anniversary of the contract, the owner must publish notice of the intended release within 14 days of the anniversary, then pay the accrued holdback between 60 and 74 days after that notice is published — unless a lien is still outstanding. A photo-based progress read has no role in any of those dates; only a certification does.
None of that should ever rest on an inference from photographs. The rule to write into your process is short: an image-derived progress read may inform a certification, may support a challenge to a trade's claim, and may never be the basis of one. A person with the authority and the professional obligation certifies, having looked.
Where a photo read belongs, and where it does not
Belongs: weekly management reporting, spotting stalled areas, challenging an inflated progress claim before the meeting, evidencing site conditions on a given date, briefing a client who is not on site.
Belongs, with care: flagging a schedule variance for investigation. The flag is the output; the investigation is the work.
Does not belong: certifying payment, determining substantial performance, releasing holdback, or supporting a delay claim on its own.
A developer with four low-rise projects in the Greater Toronto Area, one project manager covering all four, and monthly draws that are consistently argued about.
The standard: six fixed vantage points per building, photographed every Monday and Thursday at the same times, location services on, filed automatically to the project. Roughly fifty coverage images a week per site — comfortably within the selection limits of the analysis tools.
Each Friday the project manager generates a progress summary per site from that week's coverage set and reads it against the schedule. On three of the four sites it says what everyone expected. On the fourth it describes the same second-floor condition it described eleven days earlier, which prompts a phone call, which surfaces that a mechanical subtrade has been pulled to another job.
That is the whole value: eleven days of drift caught in a Friday reading rather than at the next site meeting. When the monthly draw arrives, the photo record is used to interrogate the claim — the trade claiming 70% on an area the camera says has not changed since the 9th gets a question, not a rejection — and then the certification happens the way it always did, by a person who goes and looks. The record simply makes the conversation short and specific.
You can get a number out of most tools. Whether it means anything depends entirely on whether the work is visible and whether the baseline is defined, and it is not a number to put in a payment application. Use it as a comparison over time on the same vantage points, where the error at least stays consistent.
They improve coverage, particularly on sitework and roofs, and they add cost and a capture routine that has to be maintained. Start with fixed-point phone photography, because a standard people actually follow beats better equipment used inconsistently.
As a report, usually and gladly — it is more informative than a paragraph of text. As a basis for certifying payment, expect and welcome resistance, because that is not what it is for.
A 30-minute call is enough to tell you whether AI pays for itself here.
