The housing market has changed dramatically over the last few years. Rising construction costs, challenging financing conditions, shifting demand, and the transition from condominium development toward purpose-built rental have forced developers to rethink long-standing assumptions about how projects are designed, financed, and positioned.
At the same time, sustainability requirements have not disappeared. If anything, the conversation has evolved. Rather than asking whether sustainability is important, many developers are now asking a more practical question: how can sustainability support project viability, long-term asset value, and profitability in an increasingly challenging market?
During a webinar hosted by Tim Weber, CEO of Diverso Energy, Jenny McMinn of Windmill Development Group, and Bram Adlin of Smith + Andersen explored how geothermal and building electrification are helping developers navigate this transition. The discussion revealed a growing industry consensus: sustainability works best when it stops being viewed as a compliance exercise and starts being viewed as a business strategy.
Sustainability Is Moving Beyond Compliance
For years, programs such as the Toronto Green Standard (TGS), LEED, and more recently CMHC financing requirements have played an important role in increasing the adoption of sustainable building practices.
Initially, many developers viewed these standards as requirements that needed to be satisfied. However, the industry has evolved considerably. As more projects have incorporated technologies such as geothermal, heat pumps, high-performance envelopes, and low-carbon mechanical systems, developers have gained firsthand experience with their benefits.
What began as a compliance exercise has increasingly become standard practice.
The reality is that many developers who were initially hesitant to adopt new technologies have discovered that implementation was far less disruptive than anticipated. More importantly, they have seen tangible benefits in operating performance, carbon reduction, resilience, and long-term asset value.
Municipal standards helped raise the floor, but increasingly the market itself is pulling projects toward higher performance.
The Shift from Condominiums to Rental Has Changed the Conversation
One of the most significant market changes is the growing emphasis on purpose-built rental development. In the condominium market, project success was often measured by sales velocity. Developers could focus on construction costs, deliver units, and exit the project after completion. Long-term operating performance was rarely the primary consideration.
Rental projects operate under a fundamentally different business model. Whether the owner intends to hold the asset long term or sell it to an institutional investor, operational efficiency, durability, resilience, and future-proofing become significantly more important. Pension funds, REITs, and institutional buyers are evaluating assets over decades rather than years.
As a result, sustainability is increasingly being viewed through an investment lens rather than a compliance lens. The conversation is no longer simply about achieving a carbon target. It is about protecting long-term asset value.
Future-Proofing Is Becoming a Major Driver
One theme that emerged repeatedly throughout the discussion was uncertainty. Not uncertainty about geothermal technology itself, but uncertainty about future regulations, carbon policies, energy pricing, and investor expectations.
Institutional owners are increasingly concerned about what may happen ten or twenty years from now. New regulations can emerge quickly, and assets that appear efficient today can become functionally obsolete in a relatively short period of time. This concern is driving interest in infrastructure that cannot easily be added later.
Geothermal is a prime example. While items such as rooftop equipment or domestic hot water systems can often be upgraded after occupancy, installing a geothermal field beneath a fully occupied residential tower is significantly more challenging. Many owners view geothermal as a form of insurance against future carbon regulations and energy market uncertainty.
The value is not only in today’s performance, but in preserving flexibility and competitiveness over the life of the asset.
Electrification Is the Destination—Geothermal Is One of the Best Pathways
Electrification is the goal, and geothermal is one of several technologies available to help achieve building decarbonization, alongside air-source heat pumps and other electrified solutions. However, not all electrification strategies are equal.
The industry has largely moved beyond asking whether buildings should be electrified and is now asking how to deliver electrification efficiently. This is where geothermal often stands apart.
Ground-source systems can provide heating and cooling using significantly less electricity than many alternative low-carbon technologies, particularly in larger multi-residential buildings. They also perform well during extreme weather conditions and offer long-term resilience advantages that are increasingly valued by owners and investors.
That does not mean geothermal is appropriate for every project. Site conditions, geology, project scale, and development objectives all matter.
The key takeaway is that successful decarbonization strategies are no longer measured solely by carbon reduction. Efficiency, resiliency, and lifecycle performance are becoming equally important criteria.
The Lowest-Carbon Energy Is the Energy You Never Need
Before selecting any heating or cooling technology, developers should focus on minimizing the building’s overall energy requirements through better design. Building orientation, envelope performance, glazing ratios, thermal bridging, and passive design strategies all influence long-term energy demand. Interestingly, many of these measures can create benefits beyond sustainability.
For example, reducing excessive window-to-wall ratios can improve comfort, lower energy use, reduce carbon emissions, and often decrease envelope costs at the same time. The lesson is simple: sustainability and economics are not necessarily competing objectives. In many cases, they reinforce one another.
Innovation Is Increasingly About Application, Not Technology
Geothermal is not a new technology. In fact, many of the core technologies in use today have remained largely unchanged for decades. What is changing is how those technologies are being applied.
Some of the most successful recent projects are not using radically new equipment. Instead, they are integrating proven technologies in new ways that improve cost effectiveness, reduce construction impacts, simplify ownership structures, and create stronger business cases.
One major shift is the evolution of geothermal from a capital investment to an energy service. Delivered as a utility, this model enables developers to avoid the upfront capital costs and operational complexity of managing the system. Instead, the geothermal provider designs, builds, owns, and operates the system, in exchange for a predictable monthly energy charge recovered through residents.
Examples such as geothermal-powered low-rise communities show how innovative delivery models like these can unlock lifestyle benefits at scale: eliminating outdoor air-conditioning units, freeing up yard space, and stabilizing year-round temperatures—all while staying cost-competitive with conventional construction.
The innovation is often found in the process rather than the equipment itself.
The Last Mile of Decarbonization Is Often the Hardest
A recurring theme throughout the webinar was the challenge of achieving the final stages of decarbonization.
Reducing building emissions by 50%, 70%, or even 80% is increasingly achievable using technologies that are well understood and commercially viable.
The final 20%, however, can be significantly more complex.
Domestic hot water production remains one of the largest challenges in multi-residential buildings, particularly for projects targeting full electrification. Achieving net-zero carbon often requires additional heat pumps, storage systems, and more sophisticated mechanical strategies.
This does not mean every project needs to pursue absolute zero carbon today.
For many developments, a phased approach may deliver stronger business outcomes. Designing a building that achieves substantial emissions reductions while preserving flexibility for future upgrades can often be a practical and financially responsible strategy.
The right solution depends on project goals, ownership structure, investor expectations, and long-term plans for the asset.
Collaboration Remains the Most Valuable Tool
Perhaps the strongest message from the discussion was that successful sustainability outcomes are rarely driven by a single technology.
They are driven by collaboration.
Developers, engineers, sustainability consultants, utility providers, financiers, and municipal stakeholders all play a role in finding solutions that balance performance, risk, cost, and constructability.
The most successful projects do not approach sustainability as an isolated objective. Instead, they integrate energy performance into broader conversations about financing, marketability, resilience, asset management, and long-term value creation.
As the housing market continues to evolve, that integrated approach will become increasingly important.
The Takeaway
The housing market may be in transition, but the momentum toward lower-carbon development continues to grow.
What has changed is the rationale.
Sustainability is no longer being driven solely by municipal standards or certification programs. Increasingly, it is being driven by economics, investor expectations, financing requirements, future-proofing concerns, and long-term asset performance.
Geothermal is emerging as one of the technologies helping bridge those objectives.
For developers navigating today’s market, the opportunity is not simply to build greener buildings. It is to build more resilient, efficient, and valuable assets that remain competitive for decades to come.
In an industry facing unprecedented change, that may be one of the strongest business cases for sustainability yet.