Housing development across Canada is increasingly hitting a basic but critical obstacle beneath the streets: water and sewer systems that cannot keep up with the pace of urban and suburban growth. As municipalities grapple with aging pipes, rapid population increases, and the soaring cost of upgrades, housing projects are being delayed, fewer homes are reaching the market, and the expense of new infrastructure is being passed on to buyers and renters.
Infrastructure Under Pressure
Economists, developers, and municipal leaders warn that water and wastewater systems are becoming a major limiting factor for housing construction in many parts of Canada. According to Statistics Canada, more than 11 per cent of the country's water and wastewater assets are in poor or very poor condition, requiring an estimated $100 billion or more in upgrades. This aging infrastructure is particularly stressed in fast-growing regions.
One high-profile example is Killam Apartment REIT, one of Canada's largest residential landlords, which paused new developments in Halifax largely due to water and wastewater bottlenecks. The city is now undertaking a multibillion-dollar infrastructure overhaul while working with the province to fast-track approvals and relieve pressure on existing systems.
The Scope of the Problem
Housing economist Mike Moffatt, founding director of the Missing Middle Initiative, notes that water and wastewater systems built decades ago are struggling to support the level of growth now being planned. While only a few communities have reached hard capacity limits, many more are approaching them as population growth accelerates. He points to parts of eastern Ontario, the Kitchener-Waterloo region, and Greater Vancouver as areas where infrastructure pressures are emerging.
Moffatt warns that many municipalities could hit capacity constraints within the next five to 15 years. “When those limits are reached, governments will have very expensive, capital-intensive decisions to make,” he says. The challenge is particularly acute for smaller communities; a town of roughly 10,000 people may face infrastructure upgrades costing $100 million to $200 million, an investment that is hard to justify without certainty that growth will actually occur. “That will be the tip of the iceberg,” he adds.
Visible and Hidden Delays
The most visible cases involve projects being delayed because servicing is not available. However, the larger issue may be less visible: many communities simply do not open land for development at all because they know the infrastructure cannot support it. Developers report that this issue is already shaping decisions on the ground, with projects being scaled back or relocated to areas with more capacity.
The problem extends beyond zoning approvals or land availability. As Moffatt explains, “You can’t build a house if you can’t flush the toilet.” This basic reality is forcing municipalities to confront a growing infrastructure deficit that threatens to undermine housing targets across the country. Without significant investment in water and wastewater systems, the housing crisis could deepen as new construction grinds to a halt in areas where pipes and treatment plants have reached their limits.
