Ontario Housing Development Charges Explained: How Fees Show Up in New-Home Prices

Development charges are one-time fees that Ontario municipalities impose on new development to recover the capital costs of infrastructure needed to serve that growth. They are authorized by provincial legislation — specifically, the Development Charges Act, 1997 — and can only be triggered by defined planning approvals such as the issuance of a building permit, the passing of a zoning by-law amendment, or the approval of a plan of subdivision.

That last point matters. DCs are not a general tax. They are not charged on existing homes. And they are not an ongoing annual fee. A development charge is assessed once, at a specific moment in a project's lifecycle, to fund a specific category of growth-related capital spending.

What DCs Are Not: Three Common Confusions

Homebuyers and even some real estate professionals frequently confuse development charges with two other municipal tools that can also appear on closing statements. Here is how they differ:

Ontario's provincial guidance on these tools clarifies that they are designed to work together without double-charging the same costs. A cost recovered through DCs cannot also be recovered through a CBC, and vice versa.

DCs are not a blank cheque for municipal spending. The Development Charges Act restricts them to capital costs for a defined list of eligible services — and explicitly excludes operating expenses.

Eligible Infrastructure Categories

The Act permits DCs to fund growth-related capital across a broad range of service categories: water supply and distribution (treatment plants, trunk mains, pumping stations), wastewater collection and treatment, roads and related infrastructure (arterial roads, traffic signals, grade separations), public transit (fleet expansion, stations, dedicated right-of-way), police and fire services (new stations, vehicles, and equipment for growing areas), parks and recreation (community centres, playing fields, trails), library services, paramedic services, and in some cases waste diversion and management facilities.

In practice, the balance varies dramatically between municipalities. In Toronto and Ottawa, roughly half of DC revenue is directed toward public transit and roads. In York Region, water and wastewater account for nearly 45% of DC collections. These differences reflect whether a community is growing through suburban expansion, where new pipes and roads dominate, or through urban intensification, where transit and community facilities carry more weight. The federal government's recent Bill C-26, which targets $1.7 billion toward housing-enabling infrastructure, is designed in part to offset exactly these costs so that municipalities can reduce DCs without gutting their capital plans.

Development charge rates are not arbitrary. The Development Charges Act requires every municipality to complete a formal background study before it can pass or renew a DC by-law. That study must identify three things: how much growth is expected, what infrastructure that growth will need, and what the capital cost of providing that infrastructure will be.

The Background Study Process

A typical DC background study involves several steps:

1. Growth forecasting — the municipality projects population, housing unit, and employment growth over the by-law's term (typically five to ten years), drawing on provincial growth plans and local official plan data
2. Service standard analysis — for each eligible service category, the study calculates the municipality's historical service level (e.g., kilometres of road per capita, library square footage per thousand residents) and applies that standard to the projected growth
3. Capital cost estimation — engineers and planners estimate the cost of the specific infrastructure projects needed to maintain the service standard as the community grows
4. Deductions — the Act requires certain mandatory deductions, including a share of costs attributable to replacement or benefit to existing residents, grants or subsidies expected from other governments, and any excess capacity that already exists
5. Rate calculation — the net eligible capital cost is divided across the projected number of new housing units or non-residential floor area to produce a per-unit or per-area charge

Background studies must be made publicly available, and municipalities are required to hold at least one public meeting before passing a new DC by-law. The by-law itself has a maximum life of five years for residential DCs before it must be renewed with an updated study.

Why Rates Vary So Much Between Municipalities

The result of this process is that DC rates reflect each municipality's unique combination of growth pace, infrastructure age, service ambitions, and existing capacity. A fast-growing suburban municipality building entirely new water and road networks from scratch will produce very different rates than a mature urban centre expanding through infill. With Ontario's housing start forecast recently revised downward, the growth assumptions underlying current DC rates face additional scrutiny.

Here is how 2025 rates compare across select Ontario and Canadian municipalities, based on CMHC's development charge data collection:

Single-Detached Home DC Comparison (2025)

*Markham figure includes city-wide, York Region, GO Transit, and education DCs combined.

Large Apartment (2+ Bed) DC Comparison (2025)

These figures are inclusive of both municipal and regional charges where applicable. The key takeaway: in many GTA municipalities, a single development charge now exceeds the median annual household income in Ontario.

Indexing: Why Your DC Can Change After You Sign

Many Ontario municipalities index their DC rates periodically — often every six months — using construction cost indices published by Statistics Canada. The City of Oshawa, for example, indexes DCs on January 1 and July 1 each year.

This means the DC amount written into your purchase agreement today may not be the DC amount assessed when the builder pulls the building permit months or years later. For pre-construction buyers, this creates real budget uncertainty. Unless your agreement of purchase and sale explicitly caps DC adjustments, the difference flows to your closing statement.

Here is the part that trips up most buyers: development charges are technically assessed on the developer or builder, not the homebuyer. They are payable to the municipality, most commonly when a building permit is issued. But in practice, builders treat DCs as a project cost and pass them through to buyers — either baked into the listed purchase price or itemized as a separate closing adjustment.

The Timing Mismatch

The challenge for pre-construction buyers is timing. You sign a purchase agreement in year one. The builder applies for a building permit — and pays the DC — in year two or three. If DC rates have been indexed upward in the interim, the increase shows up on your Statement of Adjustments at closing.

Industry guides for Ontario pre-construction purchases estimate that total closing costs (including DCs, land transfer tax, HST adjustments, and legal fees) typically range from 1.5% to 4% of the purchase price. In municipalities with six-figure DCs, development charges alone can be the single largest closing adjustment — larger than land transfer tax, larger than the HST rebate clawback.

The Bellisario Warning: When Closing Costs Cross the Line

How far can a builder go in passing costs to buyers at closing? A 2025 Ontario Superior Court decision drew a sharp line.

In Bellisario v 2200 Bromsgrove Development Inc, forty buyers of a Mississauga townhouse project received Statements of Adjustments that included surprise charges ranging from roughly $62,000 to over $111,000 per unit — described as "site energization" and utility infrastructure costs. The court ruled that the developer could not use vague contract language to shift core construction costs onto buyers after the fact. Costs paid to the developer's own subcontractors are part of the cost of doing business, not a legitimate pass-through charge.

The ruling reinforced a key principle: if a fee is not clearly authorized by the contract, it cannot be enforced. Builders can pass through genuine third-party municipal charges (like DCs), but they cannot repackage their own costs under ambiguous labels.

How DCs Show Up in Different Purchase Scenarios

On March 30, 2026, Canada and Ontario announced a joint commitment that directly targets the development charge burden. The Ontario backgrounder on the partnership outlines the key elements:

• $8.8 billion over 10 years in cost-matched infrastructure funding from both governments, flowing through the Build Communities Strong Fund
• Priority municipalities will be required to commit to residential DC reductions of 30% to 50% for a minimum of three years
• Municipalities that have already reduced DCs can be recognized, provided they maintain reductions for at least three years
• The infrastructure funding is intended to offset the financial impact of DC reductions on municipalities — all three levels of government share the cost
• A separate HST rebate removes the full 13% HST on eligible new homes valued up to $1 million, for a maximum rebate of $130,000

This is the most significant policy intervention targeting development charges in Ontario's history. The federal government has also tabled separate legislation directing $1.7 billion to provinces for housing supply, with DC reductions as a central goal. For buyers, the combined effect means that DCs in participating municipalities could drop by tens of thousands of dollars — potentially $60,000 to $90,000 on a single-detached home in the GTA, based on current rates.

For deeper coverage of the announcement itself, see our reporting: Canada and Ontario Commit $8.8 Billion to Slash Development Charges in Half for Three Years.

Not every new home attracts the full DC rate. Ontario has introduced several exemption and discount mechanisms:

Affordable Housing Exemptions

Through Bill 23, the More Homes Built Faster Act, 2022, the province amended the Development Charges Act to create exemptions and discounts for affordable residential units. These took effect on June 1, 2024. The province publishes an Affordable Residential Units Bulletin annually, setting market-based and income-based thresholds for purchase prices and rents that determine eligibility.

Units that meet the bulletin's affordability criteria can qualify for full or partial exemptions from DCs, community benefits charges, and parkland dedication requirements. Some municipalities, such as Niagara Region, have implemented full DC exemptions for units meeting affordable or attainable definitions.

Other Common Exemptions and Deferrals

Beyond the affordability thresholds, municipalities across Ontario offer a range of other DC relief mechanisms. Non-profit and social housing providers often qualify for full waivers or deferrals. Some municipalities exempt secondary suites and garden suites (such as basement apartments and laneway houses) to encourage gentle density. Recent legislative changes have also enabled DC deferrals or installment payments for purpose-built rental developments, and some municipalities offer DC reductions for development within designated brownfield or community improvement areas.

Whether you are buying pre-construction, purchasing a builder-inventory home, or building custom, here are the specific steps to verify what you are paying and why.

Before You Sign

• Ask the builder directly: "Are development charges included in the purchase price, or are they a separate closing cost? If separate, are they capped or subject to indexing?"
• Read the DC clause in the Agreement of Purchase and Sale. Look for language about "development charge adjustments," "levy adjustments," or "municipal charge increases." If the clause is open-ended with no cap, flag it with your lawyer before signing.
• Look up your municipality's current DC rate schedule. Every Ontario municipality publishes its rates online. Search "[municipality name] development charge rates" and compare the published rate to what the builder has quoted.
• Check whether you qualify for any exemptions. If you are purchasing an affordable unit, a secondary suite, or a non-profit-developed home, DC exemptions may apply.

Before You Close

• Review your Statement of Adjustments line by line. Every charge should be traceable to a specific clause in your purchase agreement or to a documented municipal fee.
• Compare the DC amount on your closing statement to the rate in effect when the building permit was issued. If the amount is higher than the published rate, ask for documentation showing the indexing calculation.
• Question any charge you cannot identify. Per the Bellisario ruling, builders cannot enforce fees that are not clearly authorized by the contract. Vague labels like "infrastructure recovery" or "site servicing" warrant scrutiny.
• Confirm the builder has actually paid the DC to the municipality. Your lawyer can verify this as part of the title search and closing process.

Where to Find Official Information

• Municipal website — search for "development charges" to find rate schedules, by-laws, and background studies
• Ontario.ca — the provincial bulletin on DCs, CBCs, and parkland provides the legislative framework
• CMHC — the development charges data portal allows cross-municipality comparison
• Your real estate lawyer — the single most important resource for reviewing DC clauses and closing adjustments in your specific transaction