What Are Development Charges? The Fee That Decides Your Project

Rules checked 23 July 2026. DC bylaws are amended regularly — confirm your municipality’s current schedule.

Development charges are the least understood large number in Canadian residential construction. They don’t appear in a construction quote, they aren’t a tax, and most homeowners first encounter them as a surprise line item near the end of the approval process.

For a small project they can be the difference between viable and not. They are also where the three provinces HouseLyft works in diverge most sharply — which makes them the clearest illustration of why identical projects have very different economics depending on which side of a provincial border they sit.

What are development charges?

Development charges (DCs) are one-time fees a municipality levies on new development to fund the growth-related infrastructure that development requires — roads, water and sewer capacity, transit, fire and police facilities, parks.

The logic is that growth should pay for growth: rather than existing ratepayers funding the infrastructure a new unit consumes, the new unit contributes toward it up front.

Three things to be clear about:

They’re charged per unit. Add a second dwelling unit and you have, in principle, created a new unit that attracts a charge. The number of units is what drives the bill, not the square footage.

They’re separate from permit fees. Building and development permit fees cover the municipality’s cost of reviewing and inspecting your project. DCs fund infrastructure. Both appear, and they’re different amounts for different purposes.

They’re set by bylaw and reviewed periodically. Ontario municipalities must complete a Development Charges Background Study before passing a new DC bylaw — identifying projected growth, the infrastructure it requires, and the calculated rates.

How much are they?

We aren’t going to quote a figure, and you should treat any page that quotes a single national number with suspicion. Rates are set per municipality and per unit type, and a number that’s right in one city is wrong in the next.

What to do instead: look up your own municipality’s DC rate schedule. Every Ontario municipality publishes one. Toronto’s sits on the City’s development charges bylaws and rates page, along with the bylaw and background study. Find the residential rate for your unit type and you have the scale of what you’re dealing with — or, if an exemption applies, what you’re avoiding.

Two current Toronto developments worth knowing. Council removed indexing for 2025 and 2026, holding rates at 2024 levels. And under a partnership with the federal and provincial governments announced in June 2026, the City expects to implement development charge reductions of 40 to 60 per cent between 2026 and 2029, depending on unit type. If you’re modelling a Toronto project, the direction of travel on this cost is downward — which is unusual and worth factoring in.

The exemptions that matter to homeowners

This is the money section, and for Ontario homeowners it’s the single most valuable thing in this guide.

Under the More Homes Built Faster Act, 2022 (Bill 23, Royal Assent 28 November 2022), the creation of additional residential units in existing houses and in certain ancillary structures is exempt from development charges. Specifically, the second and third units are exempt from both development charges and parkland dedication.

Three implications:

Adding a suite in Ontario is far cheaper than the sticker fear suggests. A great many homeowners abandon the idea after reading about GTA development charges, not realising the exemption applies precisely to what they’re building.

A fourth unit is not automatically exempt. The exemption attaches to the second and third units. Whether a fourth attracts a charge is a municipal question, and it’s one of the reasons the third-to-fourth unit step is more consequential than it looks.

Some municipalities go further. Toronto’s Development Charges Deferral Program for Ancillary Secondary Dwelling Units, approved by Council in April 2018, defers charges on an eligible laneway or garden suite entirely — collecting them only if a new lot is created through subdivision, condominium or severance within 20 years of the building permit. For an owner who never severs, that’s a deferral that never comes due.

The framing worth internalising: Ontario’s support for secondary suites is a fee you don’t pay, not a cheque you receive. It doesn’t feel like a grant, and it’s frequently worth more than one.

Alberta and B.C. compared

The three provinces handle this quite differently, and it explains a lot about where projects pencil.

Ontario — highest charges, statutory exemption. DCs per residential unit are among the highest in the country, particularly across the GTA. But the province-wide exemption on second and third units means homeowners adding a suite largely sidestep them.

Alberta — no equivalent charge on infill suites. Alberta municipalities don’t levy Ontario-style per-unit development charges on an infill secondary suite. Off-site levies exist and are used primarily for servicing new greenfield development. Combined with the absence of a provincial sales tax, this is why Alberta’s baseline cost of adding a unit is materially lower — a structural advantage rather than a programme, and worth more than any grant. Municipal permit and inspection fees still apply, so confirm your city’s schedule.

British Columbia — charges apply unless exempted, and it’s local. B.C. municipalities levy development cost charges (DCCs), also referred to as development cost levies (DCLs) in some cities. All development within a DCC bylaw area is liable unless exempted by statute.

The statutory exemptions are narrow — self-contained dwelling units no larger than 29 m², and building permits for work not exceeding $50,000 — neither of which covers a typical suite. However, local governments may choose to waive or reduce charges, and a number of B.C. municipal bylaws do exempt one secondary suite in a single-family dwelling or duplex, or a coach or laneway house.

The practical difference: in Ontario the exemption is a provincial entitlement; in B.C. it depends on your municipality’s own bylaw. Check the Province of British Columbia’s DCC exemptions guidance and then your specific municipality’s bylaw. Don’t assume either way.

When you actually pay

Generally at building permit issuance — which is late in the process, after you’ve already spent money on design, drawings and studies.

That timing is why DCs catch people out. By the time the bill arrives, the project is committed. If a charge is going to apply to your project, you want to know at the feasibility stage, not the permit stage.

Where a deferral applies, as with Toronto’s rear-yard suite programme, the charge is calculated but collection is postponed subject to conditions — which is a cash flow benefit and, in that particular case, frequently a permanent one.

How DCs change the maths on a fourplex

This is where the exemption structure becomes strategic rather than administrative.

In Ontario, the second and third units are exempt. A triplex conversion therefore avoids development charges on both added units. A fourplex adds a fourth unit that doesn’t get the automatic exemption — so on a per-unit basis, the fourth unit can carry a cost the second and third didn’t.

Against that, four units unlocks the federal GST rental rebate, which requires four or more stand-alone apartments and relieves the GST — and in Ontario, the provincial portion of HST too — on qualifying new rental construction. That’s a substantial saving that a triplex simply cannot access.

So the third-to-fourth unit decision in Ontario involves two opposing tax effects at once: you may pick up a development charge and you may pick up the GST rebate. Which dominates depends on your municipality’s DC rate and your construction cost, and it is genuinely worth modelling both ways rather than assuming bigger is better.

In Alberta, where the DC side largely doesn’t apply, the fourplex decision turns on financing thresholds and the GST rebate alone — a simpler calculation. Our multiplex development page covers projects at this scale, and our tax and development charge guide goes deeper on both.

Find out what your project would actually be charged

Development charges are knowable in advance, and they’re one of the few large project costs you can establish before spending anything. Whether an exemption applies to your build usually turns on the unit count and your municipality.

HouseLyft’s free property assessment covers what your lot permits and where the cost drivers sit. If your project is at multi-unit scale and you want the numbers modelled properly, get qualified.