Small and mid-size engineering and architecture practices across Ontario, where the firm's Certificate of Authorization — and the responsible professional named on it — is usually worth more protecting than almost anything else in the deal. Most of these sales are structured as share purchases specifically to keep that certificate, and the project backlog behind it, intact.
Part of Professional Services — see the family overview.
Every figure below is a typical Canadian deal-market pattern, not a valuation — use it to sanity-check what you're being told.
| Metric | Typical benchmark | Use this to |
|---|---|---|
| Backlog is the asset | A firm's signed project backlog and pipeline of committed work is typically weighted as heavily as its historical earnings, since it's the clearest signal of near-term revenue.† | Weigh contracted backlog alongside trailing earnings, not just the historical numbers on their own. |
| Responsible-professional risk | A firm's Certificate of Authorization is tied to a specific responsible professional of record — losing that person without a timely, qualified replacement is one of the few things that can actually stall a deal outright.† | Confirm the responsible professional's plans, and any succession candidate, before you get attached to a firm's numbers. |
| Fee structure and repeat-client mix | Firms with a higher share of repeat institutional or municipal clients, and fee structures that aren't purely project-by-project, tend to be viewed as more durable.† | Separate one-off project revenue from repeat-client relationships when comparing two firms of similar size. |
| E&O claims history | A clean professional-liability claims history is a meaningful value driver in this sector, given how directly it affects future insurability and premiums.† | Treat a clean E&O history as part of the price, not just a diligence checkbox. |
| Staff licensing depth | How many licensed professionals — beyond the one responsible professional — the firm carries affects both its capacity to keep the certificate valid and its resilience if any one person leaves.† | Look at licensed-staff depth, not headcount alone, when assessing how much of the firm's capability is genuinely transferable. |
A firm's Certificate of Authorization (PEO) or Certificate of Practice (OAA) is tied to a responsible professional of record, and continuity of that person — or a timely, qualified replacement — is typically a hard condition of closing, not a negotiable one.
Share sale is the default structure specifically because it lets the certificate, the project backlog, and existing client contracts stay in place, rather than being re-applied for or reassigned one by one.
Professional-liability (E&O) insurance run-off coverage for work completed before closing is a standard, separate line item from the buyer's own go-forward coverage — the two aren't interchangeable.
The same sequence underlies almost every engineering or architecture firm deal — what changes from deal to deal is how long each step takes, and which one becomes the bottleneck.
Reaching an agreement
The offer sets price and key terms — for a engineering or architecture firm it should build in the conditions that actually matter from day one, not just financing.
usually 1–2 weeks†The APS fixes price, structure — asset or share — and closing date, plus the reps, warranties, and holdbacks that protect you if diligence turns up something different than promised.
1–3 weeks to negotiate†PEO/OAA Certificate of Authorization, Responsible-professional continuity, Project backlog/contracts, E&O insurance & run-off, Staff (licensed professionals) all start moving at once, on separate clocks — this is usually where engineering or architecture firm deals are won or lost.
often the critical path†Getting to closing
Corporate, PPSA lien, and litigation searches confirm what you're actually buying; we chase down licence standing and records the seller doesn't always have to hand.
2–4 weeks, in parallel†Funds, keys, and signed documents change hands, alongside any inventory count and interim authorizations that bridge the gap until final transfers are confirmed.
1 day, once conditions are met†We track final licence confirmation and the staff transition through to completion — nothing is left for you to chase once the deal is done.
1–2 week tail†This is the first real decision in almost every engineering or architecture firm deal — and it changes what you're buying, what you're taking on, and how it's taxed.
| Question | Asset purchase | Share purchase |
|---|---|---|
| What you buy | In the rare case an asset structure were used, the firm's contracts, equipment, and goodwill — but this isn't how most licensed practices are sold. | The shares of the firm's corporation — its Certificate of Authorization, its backlog, its liabilities, and its history. |
| Certificate of Authorization/Practice | Would need to be newly applied for by the buying entity — a real setback to the backlog and existing project relationships. | Can generally continue under the corporation, provided a qualifying responsible professional remains, or is timely replaced. |
| Responsible-professional continuity | Not applicable in the same way — the certificate would be reapplied for regardless. | A hard condition of closing — the named responsible professional's status, or a qualified successor, is confirmed before the deal proceeds. |
| Project backlog & contracts | Individual client and project contracts would need consent to assign, one by one. | Generally continues with the corporation, without needing to reassign each contract individually. |
| E&O insurance | Would need new coverage arranged from scratch by the buying entity. | Run-off coverage for prior work is arranged alongside the buyer's ongoing coverage — both get reviewed as part of closing. |
| Tax angle | Generally less tax-efficient for the seller, which is part of why it's rarely used here. | Seller may access the lifetime capital gains exemption on qualifying shares. |
| Typical use in an engineering/architecture deal | Uncommon for a full-firm sale — occasionally used for a partial asset or team acquisition. | The standard structure for buying or selling an established engineering or architecture practice in Ontario. |
In the rare case an asset structure were used, the firm's contracts, equipment, and goodwill — but this isn't how most licensed practices are sold.
The shares of the firm's corporation — its Certificate of Authorization, its backlog, its liabilities, and its history.
Would need to be newly applied for by the buying entity — a real setback to the backlog and existing project relationships.
Can generally continue under the corporation, provided a qualifying responsible professional remains, or is timely replaced.
Not applicable in the same way — the certificate would be reapplied for regardless.
A hard condition of closing — the named responsible professional's status, or a qualified successor, is confirmed before the deal proceeds.
Individual client and project contracts would need consent to assign, one by one.
Generally continues with the corporation, without needing to reassign each contract individually.
Would need new coverage arranged from scratch by the buying entity.
Run-off coverage for prior work is arranged alongside the buyer's ongoing coverage — both get reviewed as part of closing.
Generally less tax-efficient for the seller, which is part of why it's rarely used here.
Seller may access the lifetime capital gains exemption on qualifying shares.
Uncommon for a full-firm sale — occasionally used for a partial asset or team acquisition.
The standard structure for buying or selling an established engineering or architecture practice in Ontario.
We tell you which structure fits — before you sign anything.
Different lists depending on which side of the deal you're on — both matter for how smoothly closing goes.
No open-ended hourly surprises — the cost is confirmed in writing before any work begins.
| Type of work | Fee | How it's confirmed |
|---|---|---|
| Straightforward purchase or sale | Starting from $3,388.87 Our charges · taxes included | Confirmed in writing once we see the agreement. |
| Larger or more complex deal | Quoted to scope | Short call → fixed written quote before any work begins. |
| Searches, filings & third-party fees | At cost | Itemized on your invoice, not marked up. |
A small practice with one responsible professional selling to a qualified successor already inside the firm, and a straightforward backlog.
Start my file →A multi-partner firm, a sale where the responsible professional's succession still needs to be arranged, or a firm with significant institutional contracts requiring individual consent to assign.
Book a consultation →Not sure which you are? That's our job to figure out, not yours. As a rough guide, most deals under a couple of million dollars are the first kind — above that, you're usually in Mergers & Acquisitions territory.
†Typical patterns across Canadian deals — not a quote or advice; every deal is confirmed on its own facts.
That gets planned for before you sign, not discovered afterward — the certificate needs either their continued involvement for a defined handover period or a qualified, college-approved successor already lined up. A responsible-professional exit with no succession plan is one of the few things that can genuinely stall this kind of deal.
Because it lets the Certificate of Authorization, the existing backlog, and signed client contracts stay in place with the corporation, rather than needing to be reapplied for or individually reassigned. An asset structure would mean starting several of the firm's most valuable relationships over from scratch.
Not necessarily to hold the shares, but the firm still needs a qualifying responsible professional named on its certificate to keep operating — that could be you, an existing partner, or a new hire, depending on how the deal is structured. What works for your specific situation gets confirmed with the college before you commit.
It covers claims that might arise later from work the firm completed before closing, separate from whatever go-forward coverage the buyer arranges. Both get reviewed and priced as part of the deal — run-off isn't something you want to discover you're missing after a claim shows up.
Generally yes on a share sale, since the contracting entity doesn't change. Individual contracts can still carry their own change-of-control or consent clauses worth checking, particularly on larger institutional or municipal engagements.
| Resource | Official link |
|---|---|
| Professional Engineers Ontario (PEO) Certificate of Authorization requirements | Visit www.peo.on.ca |
| Ontario Association of Architects (OAA) Certificate of Practice requirements | Visit www.oaa.on.ca |
Where we close engineering or architecture firm deals
Tell us about your engineering or architecture firm deal — we'll point you the right way and confirm the cost in writing before any work begins.