Ontario Notice of Project: when a constructor must file

September 29, 2026·14 min read

Begin with the project, not with a form

An Ontario contractor accepts a project with a modest initial estimate. Before work begins, a design change adds structural repair and pushes the value higher. Someone asks whether the project needs a Notice of Project. Another person points to a completed Form 1000 in the site file and says the paperwork is done. Those are different questions. The constructor needs to test the actual project against section 6 of Ontario's Regulation for Construction Projects, then use the proper notice route if the section applies. Form 1000 registration is a separate requirement under section 5.

The safest first step is to identify the project scope, the constructor, the anticipated cost of labour and materials, and whether any listed section 6 activity or feature is present. Do this before the start date is promised. Ontario's File a work notice guidance says constructors must notify the ministry before construction begins on projects meeting section 6. It points readers to the regulation for the complete trigger list. A project below the familiar cost threshold may still meet another listed condition.

This guide is for Ontario projects under the provincial construction regulation. It does not turn a client filing rule, municipal building permit, environmental approval or another province's requirement into an Ontario Notice of Project. It also does not decide whether a complex arrangement is legally one project or several. Where the project boundary or constructor identity is genuinely disputed, resolve that question with appropriate project and legal advice before treating a filing answer as final.

What section 6 asks you to check

Section 6 applies when any listed project condition is met. The first is cost. For an ordinary project, the expected total cost of labour and materials must exceed $50,000. The regulation has a separate $250,000 cost figure for a project confined to a factory that manufactures or assembles automobiles. The second figure is not a general industrial or manufacturing threshold. The word exceeds also matters. Do not turn a precise threshold into a rule that every project at exactly the stated amount necessarily meets the cost paragraph.

The cost paragraph is not the whole list. Section 6 also addresses specified building height or structural alterations, demolition, certain bridges and retaining structures, compressed-air work, entry into a tunnel or similar structure, specified trench work, and work that the regulation requires a professional engineer to design. Read the current full text of O. Reg. 213/91 against the actual drawings and method. A project may meet one of those categories even when the expected labour and materials cost is lower than the ordinary cost trigger.

Use a short screening note rather than a single yes or no checkbox. For each possible section 6 route, record the project fact that matters and where it came from. A cost estimate should have a date and scope. A building height should be traceable to the drawings. A trench answer should reflect dimensions and whether a worker may enter. Engineering design should be identified by the specific regulatory requirement, not just by the fact that an engineer was consulted voluntarily. A clear screening note helps the team see which changed fact might require the decision to be revisited.

The ministry's filing page gives the cost examples and directs constructors to section 6 for the complete conditions. Treat that page as official process guidance. Treat the current regulation as the primary statement of the legal triggers. If a short website summary and the full regulation appear to differ, do not silently choose the simpler reading. Check the current consolidated text and seek clarification for the project facts.

Fix the constructor and project boundary first

The section 6 notice is a constructor task. A property owner, general contractor and trade contractor may all use the word project differently in conversation. The filing decision needs the actual constructor and the scope of the project under the Occupational Health and Safety Act and its construction regulation. A trade contractor's separate purchase order is not automatically a separate regulatory project. Nor does a commercial contract title decide who the constructor is.

Identify the organisation that has the constructor role for the relevant project and record who within that organisation will prepare, review and submit the notice. A client may ask a subcontractor to collect information, but an internal assignment should not obscure the constructor's regulatory obligation. If several contractors will start at different times, the notice decision should be made for the project as a whole with the available scope, not for the first crew alone.

Project boundaries can be difficult where work is split by phase or area. Section 4 permits a Director to designate a part of a project as a project. That is a formal legal route, not permission for an employer to divide work informally until each portion falls below a cost threshold. When the planned division is material to the section 6 outcome, obtain a decision on the real project structure and retain it with the notice screening record.

Make the cost estimate fit the rule

The cost condition uses expected total cost of labour and materials for the project. A team should therefore avoid using only its own subcontract value, only the purchase order for one trade, or only a remaining balance after work has started. Record the estimate for the project being screened and the basis on which it was prepared. The law asks what was expected, so a dated estimate is useful evidence of the decision at the time it was made.

Scope changes deserve a new check. If an early estimate was below the applicable cost trigger but later approved work changes the expected total, revisit section 6 before the changed work proceeds. Do not assume the original negative decision lasts forever. Conversely, a project that already meets a non-cost section 6 condition does not need to wait for an estimate to cross the cost threshold. The listed conditions are alternatives.

The automobile-factory cost provision has a narrow scope. The ministry describes it as a project confined to a factory that manufactures or assembles automobiles. Avoid applying $250,000 to a warehouse, parts supplier, general industrial plant or a project merely connected to the motor industry. If the work straddles factory and other premises, the word confined is a reason to check the statute and project facts carefully rather than borrowing the higher amount.

Read the non-cost triggers from the current regulation

The section 6 list includes technical descriptions, not broad labels such as big building or serious excavation. For example, building height and storeys have their own wording, and the demolition provision refers to both height and floor area. The trench provision has dimensions and an entry condition. Do not replace those tests with a general impression that work is dangerous, or with the opposite assumption that low-value work can never trigger a notice.

Ask the designers and site planners for the facts needed to apply each relevant paragraph. Record the drawings, method statement and expected sequence used. If a structural design changes during procurement, confirm whether a listed trigger has appeared. Where the project includes a special operation, check whether the general Notice of Project is required and whether a separate special notice is also required. Filing one form should never be assumed to satisfy a different statutory notice without checking both rules.

Ontario's work notice index lists several other notice categories, including trench work, asbestos removal, suspended platforms and other specified activities. Their triggers and filing procedures differ. This article does not collapse them into the Notice of Project. A good project notice register identifies each required notice by legal source, triggering activity, responsible filer, recipient, timing, evidence and site-copy requirement.

File before the start of a section 6 project

Where section 6 applies, the constructor must follow its notice provisions before beginning work. The ministry's current guidance offers an online filing route through an Ontario.ca Login and also describes paper submission. Read the current section 6 process before relying on an old saved instruction. A filing should match the project that will actually proceed, including its location, constructor and scope.

Assign a person to make the submission and a second person to check that it has been completed. Capture the signed completed notice and proof of submission or acknowledgement available from the filing route. Tell the site team where the current copy is kept. A draft form waiting in a browser is not a completed filing, and an email saying someone will file later is not evidence that notice was given. Schedule the internal check early enough to correct missing information before work begins.

Section 6 contains provisions for specified methods and exceptional circumstances. Do not describe those as a general right to start any project without notice. A team considering a special path should read the current regulation and document why that path fits the exact facts. Emergency work should be treated as an exception governed by its stated conditions, not as a convenient label for an ordinary compressed schedule. Keep the inspector contact and any later required document with the project record.

Keep the completed notice where the rule expects it

Section 6 requires the constructor to keep the completed notification form posted in a conspicuous place at the project or available there for an inspector to review. The ministry filing guide also says a signed copy of the completed form, whether filed online or on paper, must be posted or available at the project. This is a site evidence duty. A confirmation hidden in a head-office inbox may be hard for the person at the project to produce.

Decide how the site will satisfy the posting or availability rule in its actual circumstances. Identify the current form, its location and the person who can produce it. On a mobile or changing project, check that the copy travels with the project information. A team should not post an unsigned draft while the signed completed version remains elsewhere. If the filing process produces an electronic copy, ensure it remains accessible when the usual manager is absent or the network is down.

When the project description changes, compare the change with the notice already filed. The article does not claim that every small change legally requires a new Notice of Project. The operational question is whether the notice and the section 6 screening still accurately describe the work and constructor. Record the decision and obtain current ministry guidance where amendment or resubmission is uncertain. Keep the previous version and the reason for any new filing so the sequence can be explained.

Form 1000 is not the Notice of Project

The adjacent section 5 requirement is easy to confuse with section 6. Ontario's ministry guidance says that before beginning work at a project, every constructor and employer engaged in construction must complete an approved registration form known as Form 1000. The ministry says Form 1000 is not submitted to it, but it must be at the project while the employer is working there. Section 5 also directs the constructor to obtain completed forms from employers at the project and keep a copy there while they work.

This distinction has two practical consequences. A completed Form 1000 does not substitute for a required Notice of Project. A Notice of Project filing does not eliminate the separate registration forms from the constructor and employers. The forms have different purposes, trigger wording and handling. Keep separate entries in the site document register so the team does not tick one box and lose the other.

When a new subcontractor arrives, collect its Form 1000 as required before its work starts. Check whether the new work changes the project description or adds a special notice condition. Do not claim that every new employer arrival requires a fresh general Notice of Project. The site document check is broader than the filing decision, and each obligation should be assessed on its own legal terms.

A trench can need notice even if section 6 does not apply

Section 7 of the construction regulation provides a separate trench-notice path where section 6 does not apply and the project includes a trench more than 1.2 metres deep into which a worker may enter. The constructor must give the specified notice before work at that project begins. This is another reason a negative section 6 screen must not be treated as a declaration that no notice of any kind is required.

The exact trigger depends on both depth and worker entry. Keep the excavation plan and the site condition under review. An initial design with no worker entry may change when access or installation methods are revised. The ministry's notice page lists a dedicated notice of trench work. Do not send a generic Notice of Project simply because the team has found a trench; work out which section applies and what form the ministry currently asks for.

Other special activities have their own rules. If asbestos removal, diving, window cleaning, tunnelling or a specified suspended-platform activity is planned, use the official index and relevant regulation to determine the separate filing. A single construction project may have several notices and distinct deadlines. One internal owner can coordinate the register, but that coordination should not blur who has each statutory filing duty.

Build a pre-start evidence packet

A concise packet prevents the filing decision from being reconstructed after an inspector arrives. Include the dated section 6 screening, project description, labour and materials estimate, relevant drawings or method extracts, constructor identity, the filed and signed Notice of Project if required, the submission evidence, the site copy location, and a list of separate notices considered. Include Form 1000 records under their own heading. Where a trigger does not apply, note the fact that supports that conclusion rather than leaving a blank cell.

The packet should be proportionate. It is not a demand to upload every design file into one system or to create a new statutory certificate. The aim is to let a successor understand why the constructor decided to file or not file, what facts were current, and how the site can produce the required form. Sensitive commercial values and personal details should be accessible only to those who need them while the statutory site-copy requirement is still met.

Use a change marker. New structural work, revised trench dimensions, altered project cost, a changed constructor or a new special operation should prompt a fresh look at the relevant notice screen. Assign that review to someone who actually hears about project changes. A document controller cannot update the notice register if the planner never tells them the scope has changed. A short pre-start meeting agenda item is often more effective than a long policy nobody opens.

Three examples of the screening decision

Example one: a low-cost project with a listed structural feature. A constructor expects the labour and materials cost to remain below the ordinary cost figure. The work nevertheless includes a section 6 structural condition. The constructor must assess the listed non-cost trigger, rather than stop the analysis at the estimate. Obtain the drawings and current regulation text before deciding which notice route applies.

Example two: a project in an automobile assembly factory. The team sees the higher $250,000 cost figure on the ministry page. It must first determine whether the project is confined to a factory that manufactures or assembles automobiles. If it is not, the higher figure cannot be copied into the screening note. Even if it is, the non-cost section 6 conditions still have to be checked.

Example three: a small trench job. The constructor decides section 6 does not apply, but a worker may enter a trench more than 1.2 metres deep. Section 7 has its own notice condition. The team should use the proper trench notice route, keep the evidence and still complete the section 5 registration duties. The absence of a general Notice of Project does not end the broader notice check.

These examples show a method, not a legal decision for a reader's undisclosed project. Project definitions, measurements and the current regulation control the real outcome.

A final decision check for the constructor

Before scheduling the start, confirm the project boundary and constructor. Test every relevant section 6 condition against dated project facts. If section 6 applies, submit the required Notice of Project through the current ministry process before work begins, subject only to a genuinely applicable statutory special provision. Keep the signed completed notice posted or available at the project. Complete and collect section 5 registration forms separately. Check section 7 and other special notice categories even if the general section 6 answer is no. Assign someone to revisit the decision when scope, methods or parties change.

For a wider Canadian construction program, use the Canadian construction compliance guide. If you are considering software to organise project records, ask Complys Canada to demonstrate its current capabilities against your actual notice, Form 1000 and site-copy workflow. This article makes no claim that Complys files notices, determines a legal trigger or validates a completed ministry form. The constructor remains responsible for the filing decision and its project evidence.