September 30, 2026

Owner's representative cost in Ontario, and how fees are set

What an owner’s representative costs in Ontario comes down to one thing: how many hours of a senior person’s time your project needs, and at what rate. The fee can be quoted four ways (a percentage of construction cost, a monthly retainer, an hourly rate or a fixed fee), but every one of them is that same arithmetic in a different wrapper. Because the hours don’t grow in step with the budget, the fee is a larger share of a small project than a large one. In our illustrations below it runs from roughly 2% of construction cost on a $2M project to a little over 1% on a $50M one.

Those figures are illustrations, not a price list, and we show how they’re built so you can rebuild them for your own project. No Canadian professional body publishes a fee schedule for owner’s representation the way the architects’ and engineers’ associations do for design, and most fee ranges online describe the US market. What we can give you is how the fee is put together, what it should cover, and how to tell two proposals apart.

In short:

• Hours set the fee. Whatever the model, a proposal is someone’s estimate of the hours their people will spend on your project, multiplied by a rate. Ask for both numbers.
• Percentage falls as projects grow. A $2M fit-out and a $20M building both need meetings, reports, budget reviews and closeout. The larger one needs more of each, but not ten times more.
• The model should suit the stage. Hourly or fixed fees fit early, defined tasks. A monthly retainer or a percentage fits a full engagement through construction. Most full engagements end up as a mix.
• Compare scope, not totals. Two proposals at the same price can cover very different amounts of work. Put them side by side by phase and by hours before you compare the bottom line.
• Budget it as a soft cost. The fee sits with design, permits and legal in your project budget, not inside the construction contract, and HST is added on top.

What an owner’s rep does day to day is covered in what an owner’s representative actually does. This article is about what it costs and how to judge whether a quote is fair.

How do owner’s reps charge?

There are four common fee models. None of them is better in the abstract. Each one suits a different kind of engagement, and each one puts the risk of the unknown in a slightly different place.

The clearest Ontario reference for how professional fees should be structured comes from the engineers rather than the owner’s rep trade. The Consulting Engineers of Ontario 2020 Fee Guideline (ACEC Ontario, 2020) sets out the same three methods most owner-side consultants use: time basis, fixed fee and percentage of construction cost. For project management and construction management, its preferred method is time basis, the method it recommends when scope is hard to define in advance. That’s a useful starting point for thinking about owner’s representation too, since the work is similar and just as hard to define on day one.

Hourly

Hourly billing is the most transparent model and the one professional guidelines favour when scope is uncertain. The ACEC Ontario guideline recommends time basis “when the scope of engineering services is difficult to determine or cannot be determined,” and says the firm should give the client regular status and fee reports with updated forecasts. That’s a fair thing to ask of an owner’s rep on hourly terms as well: a monthly statement of hours by person, and a forecast of where the total is heading.

The practical drawback for an owner is budgeting. You know the rate but not the total. Some owners ask for an upset limit, a cap on the hourly total. The same guideline discourages those caps on the grounds that they force the consultant to define tasks before the project is defined, which then turns every new request into a scope discussion. A forecast you review monthly usually works better than a cap set on day one.

Fixed fee

A fixed fee is a quoted price for a defined piece of work. It suits short, well-described tasks: reviewing a pro forma before you buy a site, checking a design-stage estimate, reading a construction contract before signing, or levelling bids at tender. The RAIC’s guidance on architectural fees makes the point that a fixed fee only works when “both the client and the architect must thoroughly understand and agree on all tasks required and on the project schedule.” The same holds for an owner’s rep. If the task list is vague, the fixed fee is really an estimate with a change process attached.

A few days of fixed-fee work on a defined question is also a low-risk way to see how a firm thinks before committing to more.

Monthly retainer

A retainer buys a set level of involvement each month, often described in days per week. It’s common during construction, when the rhythm is predictable: site meetings, progress claim reviews, change management, a monthly report. It’s simple to budget and simple to administer.

The question to settle up front is duration. A retainer is priced against a schedule. If construction runs three months longer than planned, the retainer runs three months longer too, unless the agreement says otherwise. Ask how an extension is handled before you sign, not when it happens.

Percentage of construction cost

A percentage fee ties the owner’s rep fee to the size of the construction contract. It’s familiar to owners because design fees are often quoted this way, and it’s easy to put in a pro forma early.

It needs two definitions to work. First, which cost: the construction contract value, or the total project cost including land, design and financing. The same fee is a very different percentage of each, so a percentage quoted without its base tells you little. The ACEC Ontario guideline defines construction cost as the contract price including the contractor’s overhead and profit and applicable taxes, except HST. Second, when it’s measured: the estimate at the start, or the final cost. If the fee moves with the final cost, changes during construction change the fee. That isn’t a reason to avoid the model, but it’s worth agreeing whether the percentage is fixed to the budget at award, so the fee is settled early and stays settled.

The same guideline also notes that below about $1,000,000 of construction, a percentage method produces a fee out of proportion to the work because the consultant’s fixed costs don’t shrink with the project. The same logic applies to owner’s representation on small projects, which is one reason small engagements are usually hourly or fixed.

Hybrids

Most full engagements combine models: hourly or fixed through feasibility and design while scope is forming, a monthly retainer through construction, and a fixed fee for closeout.

What sets the fee

The number inside the model comes from a handful of things, and some of them are within your control.

Hours, and how they spread across the project

An owner’s rep’s time isn’t spread evenly. Preconstruction is often the most demanding stretch per week, because that’s when budgets, procurement strategy, the design team’s scope and the construction contract all get set. Construction is steadier but longer. Closeout is short and easy to underestimate, because deficiencies, commissioning, holdback release and turnover documents all land at once.

The biggest single variable is how much involvement you want. One day a week of a senior person during construction is a very different engagement from three days a week plus a coordinator. Both are legitimate. The first suits an owner with some experience and a straightforward building; the second suits a complex building, an owner with no in-house team, or a project with several stakeholders who all need reporting.

The rate, and what’s in it

An hourly charge-out rate is not a salary. For reference, Job Bank reports wages for construction managers (NOC 70010) in the Toronto region from $32.05 an hour at the low end to $112.50 at the high end, with a median of $51.28 (Statistics Canada data for 2023–2024, updated November 2025). A firm’s rate is higher than the wage of the person doing the work because it also carries benefits, time that can’t be billed, training, insurance, office costs, the risk of the engagement and profit. The ACEC Ontario guideline lists most of those same factors as the basis for consultants’ rates.

Rates vary with seniority, and a well-built proposal uses each person where they fit: the senior person for the decisions, the coordinator for the tracking.

Project size, type and complexity

A tenant fit-out in an existing office building, a new mid-rise residential building and an industrial facility with heavy mechanical systems each need a different amount of attention per dollar. Renovations in occupied buildings, heritage work, phased construction and projects with complex approvals all take more time than their budgets alone would suggest. So do projects where the owner has several internal stakeholders who each need to sign off on decisions.

Delivery model and contract

A stipulated price contract under CCDC 2 asks different things of the owner’s side than a construction management arrangement under CCDC 5A or 5B, or a cost-plus contract. Cost-plus and construction management arrangements generally need more review of costs as they’re incurred. The difference between those roles is covered in owner’s rep or construction manager.

When you bring them in

Starting early can mean more total hours on paper, because the engagement is longer. It usually means fewer hours spent on problems during construction, because the budget, schedule and contract were set up with care. Starting mid-construction is shorter but tends to be more intensive per week. The timing question on its own is in when to bring in an owner’s rep.

What the fee typically covers

A full engagement from feasibility to closeout usually includes most of the following. A partial engagement covers some of it. The table is here so you can check a proposal against it and ask about anything that’s missing.

What’s usually outside the fee

These are commonly billed separately or not provided at all. Check each one:

• Disbursements: travel outside the GTA, printing, courier, software licences for project tools. The ACEC guideline notes disbursements are typically billed at cost plus an agreed mark-up.
• Specialist consultants: a quantity surveyor, a scheduling specialist, a building envelope consultant or a commissioning agent, if the project needs one.
• Legal advice: an owner’s rep will review a contract from a construction point of view, but it doesn’t replace your lawyer.
• Design: an owner’s rep manages the design team; it doesn’t design or stamp drawings.
• Extended time: work beyond the scheduled completion date, if the project runs long.
• Claims and disputes: support through a formal claim, adjudication or litigation is usually quoted separately, often at a higher rate for testimony. The ACEC guideline suggests expert testimony be billed at 1.75 to 2.25 times the usual rate.
• HST: Ontario’s HST rate is 13% and applies to professional fees. Whether you can recover it depends on your own tax position, which is a question for your accountant.

Worked examples at $2M, $10M and $50M

These three examples show how the fee is built. They are illustrations of the arithmetic, not quotes and not survey data. Every number in them is an assumption we’ve stated so you can change it.

The assumptions:

• One senior owner’s rep carries the engagement. On the larger project, part of the time is a coordinator’s.
• For simplicity, all hours are priced at a single blended rate of $175 an hour. That rate is an assumption chosen to make the arithmetic readable, not a market figure. The rate in the proposals you receive may be higher or lower, and the hours will vary more than the rate.
• Construction value excludes HST, land, design fees and financing.
• Disbursements and HST are excluded from the fee.

Three things are worth taking from this.

The percentage falls as the project grows. The $50M project is 25 times the size of the $2M one, but it needs about 13 times the hours. The fee grows; its share of the budget shrinks. That’s why a single percentage quoted for “owner’s rep fees” without a project size attached isn’t much help.

Involvement moves the number more than the rate does. If the $10M project had two days a week of senior time during construction instead of 12 hours, construction hours would go from 624 to 832 and the fee would rise by about $36,000. Changing the rate by $25 an hour moves the total by about $22,600. The level of involvement is the thing to discuss first.

Duration matters. If the $10M project’s construction ran 13 weeks long at the same weekly effort, that’s another 156 hours, or about $27,300 at the assumed rate. This is why the extension terms in a retainer or hourly agreement matter as much as the headline number.

To rebuild this for your own project, take the proposal’s weekly hours by phase, multiply by the weeks in your own schedule, and multiply by the rates quoted. If a proposal doesn’t give you enough to do that, ask for it.

How the fee sits in the rest of the budget

The fair comparison for an owner’s rep fee is the total project budget, because that’s where it sits: alongside design fees, permits, legal, insurance, financing and contingency. It’s a soft cost, paid by you directly, not part of the contractor’s price.

For context on the size of other professional fees, the same ACEC Ontario guideline suggests typical engineering design fees for buildings as a percentage of construction cost. For a building costing $2M to $4M, the suggested range is 8.30% to 12.86%; for $8M to $16M, 6.10% to 10.60% (ACEC Ontario, 2020). Those figures cover engineering design only and exclude contract administration and project management. They’re not a benchmark for owner’s representation, but they show that professional services are a normal and material part of any project budget, and that the owner’s rep fee is typically one of the smaller lines in it.

We’d caution against the other comparison you’ll often see, which is the fee set against a promised saving. No one can honestly tell you in advance what an owner’s rep will save on your project, because the answer depends on decisions that haven’t been made yet. What you can judge is the work in the proposal: whether it covers the phases where your project’s big decisions will be made, and whether the person doing it has made those decisions before. If you’d like to see the kinds of problems early budget work catches, the real cost of skipping preconstruction covers it.

On most projects, the owner’s rep fee is a line in the soft-cost budget from the first pro forma. If you’re financing the project, include it in the budget you present to the lender so it’s funded with the other soft costs rather than found later. If you’re a tenant doing a fit-out, check whether your lease’s tenant improvement allowance can be applied to professional fees; some leases allow it and some limit the allowance to hard construction costs.

How to compare two owner’s rep proposals

Proposals rarely arrive in the same format, so the work is putting them on the same footing. This is the checklist we’d use ourselves.

1. Name the people. Who will actually do the work, and what have they built before? Ask for the senior person’s time commitment in hours or days per week, by phase.
2. Break the fee down by phase. Feasibility, design, tender, construction and closeout, each with hours and rates. A single lump figure can’t be compared with anything.
3. Convert everything to hours × rate. A retainer, a percentage and an hourly quote can all be turned into implied hours. Divide the fee by the rate to see how much time is really on offer.
4. Check the base. If the fee is a percentage, confirm whether it’s of construction cost or total project cost, whether HST is excluded from the base, and whether it’s fixed at award or moves with the final cost.
5. Read the exclusions. Go through the list in the section above and mark what each proposal includes, excludes or doesn’t mention.
6. Ask about extensions. If construction runs long, what does the next month cost, and does it need your approval first?
7. Ask for the rate for extra work. Every project has requests nobody planned for. Know what they cost before they come up.
8. See a sample report. Ask for a redacted monthly report from a past project. It’s the most direct evidence of what you’ll receive every month.
9. Check the insurance. Ask for professional liability coverage and confirm it’s appropriate to the project’s size.
10. Check the exit. How can either side end the agreement, and what’s owed if they do?

Laid out this way, a proposal with fewer senior hours may be cheaper and still right for a simple project, and one with more may be worth it on a complex one. You can now see which is which.

Questions to ask in the interview

A few questions worth asking in the interview, beyond what the proposal says:

• “Walk us through a project where the budget moved during design. What did you do, and when?”
• “What would you want to see from our design team in the next two months?”
• “What does your monthly report tell us that the contractor’s report doesn’t?”
• “What wouldn’t you take on as part of this engagement?”

Listen for specifics: drawings, meetings and documents rather than general principles.

When you may not need one

An owner’s rep isn’t the right answer for every project.

You have the capacity in-house. An organization with a facilities or development team that has delivered projects of this size and type may already have the judgment it needs. Outside help might still be useful for a peak of work or a specific question, but not a full engagement.

The project is small and simple. A straightforward renovation with a trusted contractor and a clear scope often doesn’t need ongoing owner-side management. The fee, as a share of a small budget, may be hard to justify.

You’re repeating a project you’ve done before. A second building with the same design team and contractor, on a similar site, carries less uncertainty than the first.

You only need one piece of advice. Many owners don’t need a full engagement. They need a budget checked before they buy, a contract read before they sign, or bids levelled before they award. Those are defined tasks with fixed fees, and they’re often where the most useful hours of the whole project are spent. Why independent estimates pay for themselves looks at one of those tasks in detail.

On the other side, an owner’s rep usually earns its fee when the owner has little construction experience and a lot at stake, when the project is complex or has several internal stakeholders, when the owner’s own people don’t have the time, or when the budget and schedule leave little room.

Frequently asked questions

How much does an owner’s representative cost per hour in Ontario?

There’s no published schedule of owner’s rep rates in Ontario. Rates depend on seniority and the firm, and a charge-out rate covers much more than a salary: benefits, insurance, non-billable time, overhead and profit. The Toronto-region median wage for construction managers is $51.28 an hour (Job Bank, 2023–2024), and a firm’s rate will sit well above the wage of the person doing the work. Ask each firm for its rates by person, in writing.

What percentage of construction cost is an owner’s rep fee?

It depends mostly on project size and how much involvement you want. Our worked examples above, built on stated assumptions, come out at roughly 2.2% on a $2M project, 1.6% on $10M and 1.2% on $50M. Those are illustrations of how the arithmetic works, not market data. Always check whether a percentage is of construction cost or total project cost, since the difference is large.

Does the owner’s rep fee include HST?

Usually not. Fees are normally quoted before HST, which is 13% in Ontario, so a $100,000 fee is $113,000 paid. Whether you can claim the HST back as an input tax credit depends on your business and the use of the building, so check with your accountant before you finalize the budget.

Can I hire an owner’s rep for just part of a project?

Yes. Many engagements are partial: feasibility only, tender and contract only, or construction only. Starting with one defined piece of work is a common way to begin, and it lets you see how a firm works before you commit to more.

Getting a fee you can plan around

The most useful thing you can do before asking for proposals is write down what you want help with, phase by phase, and roughly how involved you want someone to be. With that in hand, every proposal you receive can be broken into hours, rates and scope, and compared on equal terms.

If you’d like to talk through what your project needs and what a sensible engagement would look like, our owner’s representation team is happy to start there. We’ve been making these decisions on projects for more than 20 years, with experience built at PCL Constructors and Oxford Properties. The first conversation is about your project and what it needs.