October 21, 2026

CCDC 17 Trade Contracts: What Owners Sign Under CCDC 5A

CCDC 17 is the standard contract you sign with each trade contractor when you build under construction management for services, CCDC 5A. The trade agrees to do its package of work for a fixed price, the construction manager administers the contract on your behalf, and you are the party the trade invoices, the party that holds its holdback, and the party its lien rights run against. On a typical 5A project that means a separate CCDC 17 for every package: excavation, concrete, steel, mechanical, electrical, envelope, finishes. The current edition is CCDC 17 – 2025, released on June 30, 2025 alongside new editions of 5A and 5B.

This article is for the owner who has already chosen 5A (the choice itself is covered in CCDC 5A vs 5B): what the 2025 edition changed, how CCDC 17 differs from CCDC 2, and how to administer a dozen of these contracts at once in Ontario. It isn’t legal advice.

What CCDC 17 is and where it sits

The Canadian Construction Documents Committee describes CCDC 17 – 2025 as “a standard contract form between Owner and Trade Contractor to perform the Work for a single, pre-determined fixed price, regardless of the Trade Contractor’s actual costs.” It adds that the form is “specifically for use where the project is performed under the CCDC 5A Construction Management method of contracting.” Its full name is the Stipulated Price Contract for Trade Contractors on Construction Management Projects.

So CCDC 17 is a lump-sum contract, like CCDC 2, but written for a project with no general contractor. Under 5A the construction manager is your advisor and agent in a limited capacity. The Ontario Association of Architects’ 2026 practice tip on CM contracts puts the arrangement this way: the owner contracts with the CM for its services on CCDC 5A “and directly with all trade contractors for their performance of the construction work using the companion CCDC 17 document.” The CM coordinates the trades, but “has no direct contractual relationship with the trade contractors and is not directly responsible for the trade contractors’ performance.”

The OAA’s earlier tip on the form makes the comparison owners find most useful: the trade contractors under CCDC 17 “would be the same as subcontractors under CCDC 2, 3 or 5B” (OAA PT.23.15, 2022). The work they do is the same. What changes is that the contract, and everything that comes with it, is in your name.

Who does what on a 5A project

Sources: CCDC’s description of the form and the two OAA practice tips above.

Note two things. The CM certifies trade payments, not the consultant, which the OAA says leaves the consultant with “less involvement and knowledge about the project’s financial progress,” though it still helps certify substantial performance for “many separate trade contracts.” And interpretation is split: the CM decides on performance of the work, the consultant on the design.

Can it be used without a construction manager?

The form names a construction manager throughout, to certify payments, issue instructions and administer changes, and CCDC describes it as a 5A document only. One published set of supplementary conditions, from Manitoba Housing (2020), was written for trades that had been subcontractors to a general contractor on the same project and were now contracting with the owner directly, but it still kept a construction manager in place. If there’s no CM on your project, ask your lawyer which form fits.

What changed in CCDC 17 – 2025

CCDC 17 was last updated in 2010. The 2025 edition came out on June 30, 2025 with CCDC 5A, 5B and 30 (BLG, July 2025). CCDC’s document list still shows both editions. Dentons (September 2025) advises using CCDC 17 – 2025 with CCDC 5A – 2025 so the new early occupancy, insurance and takeover provisions flow down from 5A to each trade.

The changes that apply to CCDC 17 specifically:

Sources: BLG (July 2025), Clark Wilson (August 2025) for the clause numbers, Miller Thomson on what Ready-for-Takeover now triggers, and Pallett Valo on the 28-day payment term and the waiver. The consequential damages waiver and adjudication are reported for all the 2025 forms, 17 among them.

Two changes often reported alongside these, termination for convenience and the removal of cash allowances, are described for 5A and 5B only in the sources we found. If either matters on your trade contracts, check the CCDC 17 text itself.

What the changes mean for an owner

The 28-day term matches Ontario’s Construction Act, so the payment terms no longer need rewriting in supplementary conditions.

Ready-for-Takeover matters more on a 5A project because each trade finishes at a different time; steel may be done a year before millwork. Settle with your CM and lawyer how it will be confirmed contract by contract, when each warranty starts, and how that lines up with the day you take over the building. How the milestone differs from substantial performance is set out in substantial performance in Ontario.

CCDC 17 vs CCDC 2

Both are stipulated price contracts. What differs is who coordinates, who certifies and how many contracts you hold.

Sources: the OAA practice tips cited above, OAA PT.23.11 on CCDC 2 – 2020, and Ontario’s constructor guideline.

The coordination row is the one owners feel most. Under CCDC 2, if drywall can’t start because framing is late, that sits inside the general contractor’s subcontracts. Under CCDC 17 both trades contract with you, so the delayed trade’s claim is against you, and recovering from the trade that caused it is a separate matter under a separate contract. On 5A you see and control the price of every package, and you carry the coordination risk a general contractor would otherwise carry.

Running a dozen trade contracts at once

A 5A project runs many CCDC 17s at the same time, each with its own invoices, holdback, changes and closeout. Here’s what that looks like in Ontario.

Payment: one clock per trade

Each trade under CCDC 17 is a “contractor” under Ontario’s Construction Act, because it contracts with you directly. The Act’s definition also covers a person contracting with “an agent of the owner” (s. 1(1)), so routing paperwork through the CM doesn’t change that. For each trade, every month:

1. The trade gives a proper invoice. Since January 1, 2026, an invoice missing information is deemed proper unless you give notice within 7 days (s. 6.1(2)).
2. The CM reviews it and certifies the amount. The invoice itself can’t be made conditional on prior certification (s. 6.3(2)), but certification after the invoice is allowed (s. 6.3(3)).
3. If you dispute any part, you give a notice of non-payment within 14 days (s. 6.4(2)). Undisputed amounts are still due.
4. You pay within 28 days of receiving the proper invoice (s. 6.4(1)).
5. The trade then has 7 days after receiving full payment to pay its own subcontractors for their share (s. 6.5(1)).

With twelve active trades that’s twelve sets of deadlines a month, plus the CM’s own invoice. Owners who handle this well set one monthly invoice date for every trade in the supplementary conditions, so the clocks run together, and give the CM a fixed number of days to certify, leaving room for your own approval and payment run. The full sequence for a single contract is in our guide to construction liens and holdback in Ontario.

Holdback and lien periods: one ledger per contract

The Act requires “each payer upon a contract or subcontract” to retain 10% of the price of services and materials as they’re supplied (s. 22(1)). On a 5A project you’re the payer on every CCDC 17, so you keep a separate holdback for each trade, and for the CM’s own contract.

Each trade contract also reaches substantial performance on its own, and each published certificate starts its own 60-day lien period (s. 31), so early trades can be due their holdback long before the building is finished. CCDC 17 has provided for progressive release of holdback since the 2010 edition (GC 5.6), and Clark Wilson’s review of the 2025 forms says progressive release now applies to all work.

Since January 1, 2026, annual holdback release is mandatory, and each contract has its own anniversary: a trade signed in March and one signed in September release six months apart. Where a trade fails to pay, your liability to its lien claimants is limited to the holdback you were required to retain (s. 23(2)), so keep the ledger accurate for every contract. For each trade contract it needs the contract date and anniversary, holdback retained, annual release notices given and paid, the substantial performance certificate and publication dates, the lien expiry date, and any written notices of lien.

Changes: through the CM, into a specific contract

Changes under CCDC 17 follow the pattern of change orders under CCDC 2: a Change Order when price and time are agreed, a Change Directive when they aren’t and the work has to proceed. The 2010 form’s table of contents has the same Part 6 headings as CCDC 2, and the CM administers them.

On a 5A project one design change often touches several contracts. Moving a wall can mean framing, electrical, sprinkler and finishes changes: four trades, four Change Orders, four invoices. Three things keep this under control:

• One change log, across every contract. Each design change gets a number, and each trade’s Change Order references it, so you can see the total cost of a decision rather than four fragments.
• Agreed markups in every trade contract. If the same markups apply across all trades, pricing is quicker and easier to check. Manitoba Housing’s published set, for example, fixes 10% overhead and 5% fee on a trade’s own work and 5% and 5% on its subcontractors’ prices, with no markup on credits (Manitoba Housing, 2020). Those are one public owner’s numbers; set your own with your CM and lawyer.
• A turnaround time. The same Manitoba set asks for a quotation within 21 calendar days of the CM’s request, open for acceptance for 15 days. Whatever numbers you choose, a written turnaround stops changes from sitting unpriced while the work goes ahead.

Coordination and delay between trades

This is where 5A asks the most of an owner. The OAA’s recommended amendment to the delay clause (GC 6.5.1) deals with delays caused by “the Owner or anyone employed or engaged by them”, and limits what the owner pays for them to direct costs. On a 5A project, the other trades are among the people you’ve engaged, so a delay one trade causes another can come back to you as a claim. The OAA’s recommendations for the 2010 edition also reinforce each trade’s responsibility “to properly co-ordinate the Work” and give the owner a right to recover from a trade its reasonable costs, including extra consultant fees, of a delay it caused (OAA PT.23.15).

In practice, the protection is mostly the CM’s master schedule:

• Make the master schedule a contract document for every trade, and require each trade to perform to it, as updated. Manitoba Housing’s set adds a duty to perform the work to the submitted construction schedule (GC 3.5).
• Require each trade to give the CM notice of delay promptly, with the cause, so the delay can be traced to its source while the facts are fresh.
• Ask the CM to record trade-to-trade handovers (area turned over, date, condition) in its daily reports, so a delay claim made months later can be checked against what happened.
• Consider whether to ask for float to be shared. Manitoba Housing’s set says any contingency time built into the contract is applied first, before a delay counts.

Since 2026, time extensions and delay claims can go to adjudication (Pallett Valo, March 2026), and related adjudications under separate contracts can be heard together by one adjudicator if the parties agree (s. 13.8(1)). On a 5A project one event can produce claims under several contracts, so it’s worth agreeing in the SCs that you’ll consolidate where you can.

Insurance: one program or many policies

With no general contractor, nobody carries a project-wide policy by default. You decide, with your broker, whether to buy wrap-up liability and builder’s risk for the whole project yourself or have each trade insure its own work.

The British Columbia government publishes the supplementary conditions it uses for owner-insured CCDC 17 projects, and they show what an owner-controlled program looks like (BC Risk Management Branch, January 2023, revised March 2023). The owner buys a commercial general liability wrap-up covering the owner, trades, their subcontractors and the consultants, plus course of construction (builder’s risk) coverage for the work. Each trade still carries its own automobile liability, any specialty cover its work calls for, and its own CGL whenever the wrap-up isn’t in force, and pays the deductibles on the owner’s policies except for flood and earthquake. The figures are set for BC ministry projects; the structure is what’s useful.

Insurance timelines in the 2025 form run to Ready-for-Takeover, and early occupancy shifts insurance for the occupied part to you. Pallett Valo advises notifying insurers first, since early use “affects builder’s risk and liability coverage.” With phased occupancy, give your broker the CM’s occupancy plan as well as the schedule.

The constructor role

Under Ontario’s Occupational Health and Safety Act, the constructor is responsible for health and safety on the project. The Province’s constructor guideline says an owner who contracts with more than one contractor, with no one agreeing to take on the role, will likely be deemed the constructor. That’s the default on 5A. The OAA recommends delegating the role to the CM through supplementary conditions, and that the owner “also amend its contracts with trade contractors to recognize this role being undertaken by the CM.”

So the CCDC 17 supplementary conditions should name the CM as constructor if that’s the arrangement, and the CM has to actually control the site to match. Manitoba Housing does the equivalent under Manitoba’s law, naming the CM as the “prime contractor” in GC 9.4. Settle it before mobilization.

Supplementary conditions owners add to CCDC 17

The OAA calls it “unusual” to use CCDC contracts without supplementary conditions. These amendments come from published sets (the OAA’s for the 2010 form and Manitoba Housing’s 2020 set), as examples to discuss with your lawyer. Insurance and the constructor role are covered above.

Roles and interpretation. The OAA’s main concern with the 2010 form was the split between the CM (performance of the work) and the consultant (design). It argued the two can be “one and the same” and that the split “may cause considerable confusion.” Its recommended conditions let the CM give a first interpretation and refer anything unresolved to the consultant for a finding. The 2025 edition clarifies the roles, but check that your SCs leave no question as to who decides what.

Administration through the CM. Manitoba Housing routes instructions through the CM, including the owner’s right to ask for removal of a trade’s supervisor or employee for reasonable cause.

Closeout documents per trade. Manitoba Housing requires each trade to hand over warranties, manuals, test reports and as-builts promptly after its substantial performance certificate, with anything outstanding due with its final payment application. Ask the CM to track them trade by trade as each one finishes.

Changes and delay. Fixed markups and a quotation turnaround, as above. Manitoba Housing also requires a trade to mitigate a delay before it’s compensated, limits delay claims to actual costs with no profit or overhead, and lets the owner, through the CM, direct a trade that falls behind schedule to add overtime and equipment at its own cost.

Set-off. A clause letting you set off amounts owed by the trade against payments due. Use with care in Ontario: anything you don’t pay still needs a notice of non-payment within the Act’s timelines.

Bonds. Manitoba Housing asks for a performance bond of at least 50% of the Contract Price before work starts. Set security by package size: a structure or mechanical contract carries more risk than a signage package.

Termination. Manitoba Housing adds an owner’s right to terminate without default, paying for work done and direct termination costs but not lost profit. The 2025 edition added termination for convenience to 5A and 5B; check whether your CCDC 17 – 2025 form already contains an equivalent before adding one.

Don’t copy another province’s set

Sets from other provinces aren’t drafted for Ontario law. Manitoba Housing’s makes payment due 30 days after the payment certificate; in Ontario the 28-day clock runs from the proper invoice, so that clause would conflict with the Act. Start from the 2025 form and the Construction Act, and have your lawyer draft Ontario wording for any idea you take from another set.

Before you sign: a checklist for CCDC 17

Each of these should have a written answer before the first trade contract goes out.

1. Is it CCDC 17 – 2025? And is it paired with CCDC 5A – 2025, with supplementary conditions drafted for the 2025 editions?
2. Is there one set of SCs for every trade? A common set with a short schedule per package beats a dozen variations.
3. Do the package scopes cover everything once? A scope matrix assigning every specification section, plus temporary services, hoisting, protection and cleanup, to one trade.
4. Who is the constructor? Named in the 5A contract and every CCDC 17, and matching who actually runs the site.
5. Who decides what? The CM’s and consultant’s roles on interpretation, payment certification, changes and substantial performance, written down.
6. Is the payment calendar set? One invoice date for all trades, a certification turnaround for the CM, and your own approval and payment days, inside 28 days.
7. Is the holdback register ready? One line per contract, with anniversaries, release notices, certificates and lien expiry dates.
8. Are change markups and turnarounds the same for every trade? And is there one change log across all contracts?
9. Is the master schedule a contract document? With a duty to perform to it, notice of delay requirements and a record of handovers between trades.
10. How is the project insured? An owner-controlled program or trade-by-trade policies, confirmed with your broker, including what happens on early occupancy.
11. What security does each trade give? Performance and labour and material payment bonds, or other security, set by package size.
12. How will Ready-for-Takeover and warranties work for each trade? And how do they line up with the date you take over the building?
13. What does closeout look like per trade? Warranties, manuals, as-builts and training, collected as each trade finishes.

Frequently asked questions

What is a CCDC 17 contract?

CCDC 17 is the Canadian standard form stipulated price contract between an owner and a trade contractor on a construction management project. The trade does its package of work for a fixed price, the construction manager administers the contract, and the owner pays the trade directly. It’s used with CCDC 5A. The current edition is CCDC 17 – 2025, released June 30, 2025.

What’s the difference between CCDC 17 and CCDC 2?

Both are fixed-price contracts. CCDC 2 is one contract with a general contractor for the whole project, with the consultant certifying payment. CCDC 17 is one contract per trade on a CCDC 5A project, with the construction manager certifying payment. Under CCDC 17 you hold every trade contract, so holdback, lien periods and coordination between trades sit with you rather than a general contractor.

Who is the constructor under CCDC 5A and CCDC 17?

In Ontario, likely the owner, because an owner contracting with several contractors, with no one agreeing to take on the role, will likely be deemed the constructor. The OAA recommends delegating the role to the construction manager in the supplementary conditions, amending each CCDC 17 to match, and the CM then has to actually control the site.

Does CCDC 17 work with CCDC 5B?

No. Under CCDC 5B the construction manager holds the trade contracts as its own subcontracts, often on the CCA 1 stipulated price subcontract. CCDC 17 is for trades that contract directly with the owner, which is the CCDC 5A model. The difference between the two CM contracts is set out in CCDC 5A vs 5B.

Where to start

If you’re about to let the first trade packages on a 5A project, settle the common terms once, before the first contract is signed: the SCs every CCDC 17 will carry, the constructor arrangement, the payment calendar and the holdback register. Changing them later means amending every contract.

Our construction management experience was built at PCL Constructors and Oxford Properties, on Toronto projects including CityPlace for Concord Adex (eight condominium towers, delivered as two back-to-back $540M construction management assignments), 3 Swift and 1266 Queen Street West. We help owners set up and run CM projects, including the trade contract terms and the payment and holdback process behind them, as part of our construction consulting work. After 20+ years on CM projects, the checklist above is where we’d start with you.