Density bonuses allow developers to build more floor space than zoning normally permits, in exchange for providing public benefits like affordable housing or open space. A recent report by Urban Systems Ltd. for the City of Victoria helps illustrate how much extra value a density bonus may be able to bring to communities without impacting the viability of developments.

What Are Density Bonuses and Why They Matter

Density bonuses (also called density bonusing or density bonus contributions) enable municipalities to offer developers additional floor area beyond the “as-of-right” zoning limits, in exchange for specified public benefits such as affordable housing, public art, or parkland. Municipalities may adopt density bonus systems as a voluntary tool to:

• Augment public amenities that lie beyond what development cost charges or permit fees can fund.
• Increase certainty and transparency by setting fixed bonus rates rather than negotiating site-by-site.
• Target incentives toward housing forms (e.g. family-sized units, green buildings) or neighbourhood goals. 

Density bonuses capture a share of the increased land value (“land lift”) created by higher permitted densities and recycle it into community benefits. Properly calibrated, they deliver public benefits with minimal impact on housing viability or supply

What Is “Land Lift,” and How Do You Measure It?

“Land lift” simply means the extra value a piece of land gains when its allowed building size goes up. If a site that can normally support 16,000 square feet of building (a Floor-Space Ratio, or FSR, of 1.6 on a 10,000-square-foot lot) is then permitted to rise up to 25,000 square feet instead (an FSR of 2.5), that extra 9,000 square feet can be sold or rented, and that potential income adds to what a developer can pay for the land in the first place.

To estimate land lift:

1. Project total revenue under the base FSR (using local sales or rental rates).
2. Subtract all expected costs—construction, professional fees, financing charges, developer profit, and closing costs—leaving what’s called the “residual land value.”
3. Repeat the same calculation with the higher FSR.
4. The difference between the two land values is the lift.
   

This can show how much extra a buyer might pay if bonus density is available.

Turning Land Lift into a Bonus Fee Based on a 75% Capture Assumption

Once the total lift is known, an assumption is made on how much of it the city will “capture” through a bonus fee. While other cities may assume different percentages for this, Victoria’s study assumed the city would keep 75% of the lift, leaving 25% for the developer’s extra profit. Victoria’s study assumed the city would keep 75% of the lift, leaving 25% for the developer’s extra profit. Other municipalities may choose capture rates anywhere from roughly 25% to 80%, depending on local market and policy priorities.

The fee per square foot of bonus space was calculated:

Bonus fee = (Land lift × 0.75) ÷ Incremental square feet

For example, if land lift is $2 million and there is a gain of 9,000 bonus square feet, then:

$2 million × 0.75 = $1.5 million
$1.5 million ÷ 9,000 sf = $167 per bonus sf

In practice, Victoria’s individual sites showed bonus fees more in the $42 to $122 per square-foot range, depending on local land prices. It’s important to remember that even a relatively small fee can generate significant community benefits without making a project unprofitable.

Adjusting for Different Neighbourhoods and Site Conditions

Not every lot behaves the same way. A high-demand downtown parcel will show a much larger land lift than a site in a quieter residential street, and properties with difficult soils or steep grades have higher construction costs that eat into lift.

To adjust:

• Check recent land sale prices in the exact neighbourhood.
• Ask a builder or engineer about extra costs tied to soil, slope, or heritage requirements.
• Re-run the simple pro-forma at different land-price and cost assumptions.
  

By testing both “best-case” and “hard-case” scenarios, you can advise sellers on a realistic bonus fee range—high enough to deliver public benefits, yet low enough that developers still make a sound return on their investment.

Why a Small Fee Can Matter Locally but Not City-Wide

Victoria’s city-wide model showed that adding a $10 per-square-foot density bonus fee would reduce overall housing capacity by less than 0.5%. A $10 fee on 9,000 bonus square feet generates $90,000 for the city or community amenities. It is important to note that this result is specific to Victoria’s market assumptions; other cities with different land values, construction costs, or development pipeline constraints may see larger impacts.

When marketing a parcel or advising a client, emphasize that modest fees can fund critical benefits without hurting overall housing delivery. This dual perspective helps landowners and developers see the win-win of extra community value, with no major downside to project viability.

Staying Informed

Density bonus opportunities often arise in response to new municipal or provincial rules. In Victoria, updates to the Official Community Plan in 2023 and recent provincial housing legislation prompted the density bonus re-evaluation. As a result, the city is now considering a bonus for family housing, allowing an extra 0.15 FSR for projects that deliver at least 15% three-bedroom units.

To stay ahead:

• Monitor city planning department announcements and public notice boards for OCP amendments or bylaw updates.
• Sign up for newsletters or attend council and advisory committee meetings.
• Look for gaps in policy, such as missing incentives for seniors’ housing or green-building features.