Why Are 9,589 Ottawa Rental Units Still Empty?

Why Are 9,589 Ottawa Rental Units Still Empty? Why Are 9,589 Ottawa Rental Units Still Empty? Austen June 17, 2026 · 5 min read The Impossible Math of New Construction A 6.7% vacancy rate for brand-new apartments sounds impossible - until you see the rent prices. Here's the reality: Ottawa has 9,589 purpose-built rental units under construction right now, yet developers can't fill the ones they've already built [4] . New apartments sit empty at rates seven times higher than older buildings, where vacancy hovers under 1% [1] . This isn't a supply problem. It's an economics problem. The issue is brutally simple. Construction costs have hit levels where new units must charge rents most Ottawa residents simply cannot afford [2] . Will McDonald, Director of Strategic Projects for the City of Ottawa, put it plainly: "The cost to develop new units requires rents to be set at levels that people cannot afford" [3] . Developers aren't being greedy. They're trapped by math. Build a new unit, and you need to charge enough to cover land acquisition, construction labor, materials, financing, and profit. That number lands well above what the average renter can pay. So these buildings open with marble lobbies and rooftop terraces, priced for a tenant base that doesn't exist in sufficient volume. Meanwhile, older rental buildings - the ones that historically provided lower rents - are disappearing [1] . When Developers Start Giving Things Away Developers know they have a problem. You can see it in the incentives. "A lot of [developers] will give maybe one month of free rent, or two months of parking without any charge," notes Cortellino [2] . That's not normal market behavior. That's desperation dressed up as a promotion. When you're offering free rent just to get someone through the door, you're acknowledging your product is mispriced for the market. But here's the trap: they can't lower the rent permanently. The building's financing depends on hitting certain revenue targets. Cut rents too much, and the whole project goes underwater. So they offer temporary concessions, hope vacancy drops, and pray the market shifts before their cash flow collapses. It won't. Not unless something fundamental changes. The Tenant Who Vanished Ottawa's rental market was built on a specific assumption: steady growth in international migration, particularly international students. Sandy Hill, for instance, thrived on student renters [3] . Then that pipeline shut off. International student numbers collapsed. Migration flows dried up. And suddenly, the tenant base that was supposed to absorb all this new supply simply wasn't there anymore. The market went from under 2% vacancy to 3.5% overall - approaching what economists call a "balanced market" [6] . For tenants, that's good news. For developers who bet millions on continued demand growth, it's a nightmare. Secondary condo rentals tell the same story. Lease transactions hit a four-year low in 2024, with just 977 deals [4] . Investors are walking away. They're either converting units back to owner-occupied condos or exiting rental real estate entirely. When your business model depends on scarcity and prices keep softening, why stay? The Pipeline That's Slowing Down Developers aren't stupid. They see what's happening. Ottawa has 115,277 purpose-built rentals proposed, with 60% already approved - that's 69,354 units with municipal green lights [4] . But units under construction? Down to an 11-quarter low [4] . Builders are hitting pause. The "precarity mindset" has set in [5] . Why start a new project when your current buildings are hemorrhaging cash on incentives? This is where the market breaks. We need more rental housing, particularly affordable rental housing. But the economics make it impossible to build affordably, and the demand for luxury units is saturated. Developers are stuck between a market that needs cheap housing and a cost structure that only allows expensive housing. No one wins. What Actually Fixes This The answer isn't more supply - at least, not the supply we're currently building. Adding another thousand units at $2,500/month doesn't help renters priced out at $1,800/month. The gap between construction costs and affordable rents is a policy problem, not a market problem. Developers can't solve this alone. They need regulatory changes that reduce land costs, tax incentives that offset construction expenses, or direct subsidies that bridge the affordability gap. Otherwise, we'll keep building units no one can afford while the older, cheaper stock continues to vanish. Ottawa's vacancy rate is climbing, but it's not because we solved the housing crisis. It's because we built the wrong thing at the wrong price for tenants who aren't there anymore. Until construction economics change, those 9,589 units will keep sitting empty - and the people who actually need housing will keep getting squeezed out. Sources [1] Why Ottawa's Rental Market Feels Tight Even When Supply Is Rising [2] Why Ottawa's New Rental Units Are Sitting Empty: Vacancy Rates Surge to 6.7% in 2025 [3] Q&A: Affordability, Supply and Availability in Ottawa's Rental Market [4] Ottawa Rental Vacancy Increases as New Completions Continue to Grow [5] Ottawa Housing Market Faces 'Precarity Mindset' and Rental Supply Surge [6] Responding to Ottawa's Historic PBR Surge and Changing Renter Demographics Austen View more posts → Published with Austen — goausten.ai