Chicago’s Geothermal-Powered High-Rise Could Redefine Sustainable Urban Development

Chicago’s Geothermal-Powered High-Rise Could Redefine Sustainable Urban Development

Chicago is preparing to welcome one of its first all-electric, geothermal-powered residential high-rises—a 33-story tower at 410 N. Elizabeth Street in Fulton Market. The project could demonstrate how large urban buildings can reduce fossil-fuel dependence, lower operating costs and cut carbon emissions without sacrificing density, comfort or year-round reliability. 

A New Model for Chicago High-Rise Construction

The 410 N. Elizabeth Street development is being built by Tree Street Group in partnership with Magellan Development Group and Mark Goodman & Associates. The first phase will deliver 383 apartments, including 77 designated affordable units, while a planned second tower would bring the overall development to more than 724 residences and 146 affordable homes. 

The project is also expected to include ground-floor retail, public green space and a 30-foot-wide pedestrian walkway along the southern edge of the site. This combination of residential density, community amenities and low-carbon infrastructure positions the development as more than an individual apartment building; it is intended to serve as a model for sustainable neighborhood-scale growth.

At the center of the project is a closed-loop geothermal heating and cooling system. Construction crews began drilling approximately 65 wells, each extending about 820 feet below the site. At that depth, ground temperatures remain close to 55 degrees Fahrenheit throughout the year, creating a stable thermal resource that can support the building in both winter and summer. 

Unlike conventional heating and cooling systems that generate or dispose of heat using combustion equipment and air-conditioning condensers, geothermal systems move heat between a building and the ground. During winter, heat pumps extract heat from the ground and transfer it indoors. During summer, the system reverses the process, removing heat from apartments and transferring it into the earth.

How the Geothermal System Works

The geothermal installation at 410 N. Elizabeth Street will use underground piping connected to building heat pumps. Water or a water-based fluid will circulate through the closed-loop network, exchanging heat with the surrounding soil and rock.

The system does not depend on high underground temperatures associated with traditional geothermal power plants. Instead, it uses the relatively constant temperature of the shallow subsurface as a heat source and heat sink.

This distinction is important. Traditional geothermal power generation generally requires high-temperature reservoirs capable of producing steam or hot fluid for electricity production. Building-scale geothermal systems, by contrast, can operate in locations where the ground is only moderately warmer or cooler than the air above it.

The technology is more accurately described as a ground-source heat-pump system. Its efficiency comes from moving heat rather than creating heat through the combustion of natural gas or another fuel. Heat pumps still require electricity, but they can deliver more heating or cooling energy than the electrical energy they consume.

For a high-rise building, the underground loop field functions as a large thermal battery. It absorbs excess heat during cooling season and provides a stable source of heat during winter. The long-term performance of the system depends on careful design, including the number, depth and spacing of wells; the building’s insulation levels; and the balance between annual heating and cooling demand.

Why Chicago Is Well Suited to Geothermal

Chicago’s climate presents a demanding test for building-energy systems. Winters can bring severe cold, while summers regularly create periods of high humidity and intense cooling demand. That seasonal contrast makes efficient heat exchange particularly valuable.

The ground below the building remains far more stable than outdoor air temperatures. A geothermal system can therefore reduce the extreme temperature lift that conventional air-source systems must manage. In practical terms, heat pumps do not have to extract heat from extremely cold winter air or reject heat into very hot summer air.

The city’s dense urban form also creates an opportunity for geothermal systems integrated into new construction. Developers can install boreholes during the early stages of site preparation, before the building is completed and occupied. Planning the system from the beginning makes it easier to coordinate drilling, structural work, mechanical rooms and electrical infrastructure.

However, geothermal is not automatically suitable for every urban site. Developers must evaluate available drilling space, subsurface geology, regulatory requirements, groundwater conditions and the building’s thermal profile. High-rise projects also require detailed modelling because heating and cooling demand varies significantly among apartments, common areas, retail spaces and mechanical systems.

Projected Energy and Emissions Benefits

According to project representatives, more than 80 percent of the tower’s heating, cooling and hot-water needs will be supported by the geothermal system. The building’s overall design is projected to reduce energy use by approximately 60 percent compared with traditional systems. 

The development is also expected to reduce energy costs by more than 25 percent and cut emissions by roughly 30 percent. Project representatives estimate that the first tower could reduce annual carbon emissions by approximately 390 tons.

These figures are projections rather than operating results, meaning the project’s actual performance will depend on construction quality, equipment efficiency, tenant behavior, utility-grid emissions and system maintenance. Nevertheless, the expected reductions illustrate why geothermal heat pumps are gaining attention in large multifamily developments.

An all-electric building eliminates on-site combustion for space heating, hot water and cooking. That can reduce direct carbon emissions and remove combustion-related pollutants from apartments and mechanical spaces. Residents may also experience quieter operation because geothermal heat pumps avoid the large outdoor compressors and combustion equipment associated with many conventional systems.

The emissions advantage will become stronger as the electricity grid adds more renewable and low-carbon generation. An all-electric building can gradually become cleaner without replacing its core heating equipment. A gas-heated building, by comparison, remains tied to on-site fossil-fuel combustion unless it undergoes a major mechanical conversion.

The Role of High-Performance Building Design

Geothermal energy is only one part of the 410 N. Elizabeth Street sustainability strategy. The tower will also use triple-glazed window-wall systems to improve insulation and reduce heat transfer through the building envelope. 

High-performance windows can reduce winter heat loss, limit summer heat gain and improve occupant comfort near exterior walls. They also help reduce the peak load placed on heat pumps, allowing mechanical systems to operate more efficiently.

This relationship between the building envelope and mechanical system is essential. A geothermal system installed in a poorly insulated building may still face large peak loads and require significant backup capacity. By reducing heating and cooling demand first, developers can install a smaller and more efficient mechanical plant.

Other design measures may also influence performance, including airtight construction, energy-efficient lighting, heat-recovery ventilation, smart controls and efficient domestic hot-water systems. The most successful all-electric projects treat energy performance as an integrated design objective rather than adding a geothermal system at the end of the development process.

Managing Peak Demand

The greatest technical challenge for any geothermal building system is peak demand. A closed-loop borefield can provide a reliable thermal exchange medium, but it does not eliminate the need to size equipment for extreme weather.

During a prolonged cold snap, the building may require far more heating than it needs during typical winter conditions. The same applies during a severe summer heat wave, when cooling demand can rise sharply across hundreds of apartments.

Project representatives have identified peak demand as a central design concern for 410 N. Elizabeth Street. The system must deliver sufficient capacity during Chicago’s most demanding weather events while avoiding excessive oversizing during normal conditions. 

A project may address this challenge through a combination of strategies:

- High-efficiency heat pumps with variable-speed operation.

- Supplemental electric resistance or other backup heating capacity.

- Thermal storage that shifts demand away from peak periods.

- Smart building controls that coordinate apartment, common-area and hot-water loads.

- Improved insulation and glazing to reduce peak heating and cooling requirements.

- Demand-response programs that adjust equipment operation when grid conditions are constrained.

The choice of backup systems will influence the building’s emissions profile, operating costs and resilience. A properly designed geothermal plant should be assessed not only on average annual performance but also on its ability to maintain comfort during extreme conditions.

Financing a Complex Development

The project’s sustainability strategy also played a role in securing financing. Tree Street Group reportedly spent approximately three years arranging funding for the 383-unit tower amid inflation, high interest rates and uncertainty in the construction and real estate markets. [1]

Large multifamily developments face substantial financial pressures before construction begins. Rising material costs, labor shortages, expensive debt and uncertain rents can delay projects or make them difficult to underwrite. Mechanical systems that require specialized drilling and design may initially appear to add further complexity.

At the same time, energy performance can improve a project’s long-term financial case. Lower utility consumption may reduce operating expenses, while all-electric design can help developers respond to climate regulations and changing investor expectations. Buildings with efficient systems may also become more attractive to tenants seeking lower energy bills and better indoor comfort.

The financial value of geothermal therefore extends beyond direct energy savings. It can support regulatory compliance, strengthen environmental reporting, improve asset positioning and reduce exposure to future fossil-fuel price volatility.

For developers, the key question is not simply whether geothermal costs more to install than conventional equipment. The more relevant question is whether the additional upfront investment creates sufficient value over the building’s operating life.

Chicago’s Existing Geothermal Experience

Although large geothermal multifamily towers remain uncommon in Chicago, the region already has experience with ground-source systems. Loyola University Chicago operates multiple geothermal installations at its Chicago-area campuses. [1]

The university’s largest system, installed in 2012, uses 91 wells and approximately 17 miles of underground piping. It serves the 217,000-square-foot School of Environmental Sustainability facility, nearby offices, laboratories, classrooms and a 420-bed residence hall. 

Institutional campuses can be particularly suitable for geothermal because they often control large sites and operate multiple buildings with complementary energy loads. A campus may use the same borefield to support academic buildings, laboratories, offices and residences, improving the overall utilization of the system.

The 410 N. Elizabeth Street project applies a similar concept within a dense urban residential setting. Instead of serving a university campus, the geothermal plant will support apartments and associated building functions on a constrained city site.

Its performance could provide valuable operational data for future Chicago developments. Developers will be able to evaluate drilling costs, construction timelines, maintenance requirements, tenant comfort and actual energy savings in a high-rise environment.

Lessons from New York’s Riverie

Chicago is not the only major U.S. city experimenting with geothermal residential construction. The Riverie, a large all-electric development on Brooklyn’s waterfront, uses a vertical closed-loop geothermal system to serve 834 rental residences. The project is described by its developer as New York’s largest geothermal residential building and is projected to reduce carbon emissions by 53 percent.

The Riverie includes multiple towers and affordable housing, demonstrating that geothermal systems can be integrated into large, high-density developments rather than limited to small buildings or suburban properties. Its scale offers a useful comparison for Chicago as the industry evaluates how ground-source heat pumps can support urban housing.

The two projects also reflect a broader shift in building design. Developers are increasingly combining electrification, efficient envelopes, geothermal systems and low-carbon materials to meet climate objectives. These approaches are especially relevant in cities adopting stricter building-performance and emissions standards.

Although local geology, regulations, utility prices and building designs differ, the projects share a common principle: clean energy infrastructure must be planned as part of the development from the earliest design stages.

From Individual Buildings to District Systems

The long-term opportunity may extend beyond isolated geothermal buildings. Tree Street Group has expressed interest in systems capable of serving entire districts rather than one or two structures. 

District geothermal networks could connect multiple buildings to shared borefields, heat pumps, thermal storage and distribution infrastructure. Such systems may improve efficiency by balancing loads among buildings with different usage patterns.

For example, an office building may require cooling during the day while residential buildings create heating and hot-water demand at different times. A district network could exchange energy between properties instead of treating each building as an independent thermal system.

Shared infrastructure may also reduce the amount of drilling required per building and allow borefields to be placed in parks, plazas, rights-of-way or other common areas. However, district systems require agreements among property owners, coordinated planning and clear rules for capital investment, maintenance and energy billing.

Cities may need to establish new permitting frameworks and incentives to support this model. Public agencies could also play a role by coordinating geothermal planning during major redevelopment projects or infrastructure upgrades.

Barriers to Wider Adoption

Despite its potential, geothermal heating and cooling faces several barriers in dense urban markets.

The first is upfront cost. Drilling dozens of deep wells requires specialized equipment, skilled contractors and careful site coordination. Developers must commit capital before the energy savings are realized.

The second is space. Urban sites often leave little room for conventional horizontal ground loops, making vertical boreholes necessary. Vertical systems can work efficiently, but drilling logistics become more complicated when construction occurs near existing buildings, roads, utilities and transit infrastructure.

The third is technical expertise. Engineers must accurately model the ground loop, heat-pump plant, building envelope and peak loads. Poorly designed systems can suffer from thermal imbalance, declining performance or insufficient capacity.

The fourth is market familiarity. Lenders, appraisers, insurers and building owners may be more comfortable with conventional boilers and chillers because their costs and operating histories are well understood. Projects such as 410 N. Elizabeth Street can help reduce that uncertainty by creating a local record of geothermal performance.

Finally, geothermal systems require long-term monitoring. Owners should track electricity use, ground temperatures, equipment efficiency and maintenance costs to verify projected benefits and identify problems early.

What the Project Means for Developers

For developers, the project sends a clear signal that geothermal energy is moving into the mainstream of high-density construction. It also reinforces the importance of early planning.

A successful geothermal high-rise requires coordination among architects, civil engineers, mechanical designers, drilling contractors, energy modellers, financing partners and building operators. Decisions about borefield size and location can affect foundations, parking, landscaping and construction sequencing.

Developers considering similar projects should begin with a feasibility assessment covering:

- Building heating, cooling and hot-water loads.

- Subsurface geology and groundwater conditions.

- Available drilling areas and borehole depths.

- Local permitting and environmental requirements.

- Electrical-service capacity and backup systems.

- Construction costs and expected operating savings.

- Long-term monitoring and maintenance responsibilities.

The ownership model is also important. At 410 N. Elizabeth Street, Infinite Energy Partners will own and operate the geothermal system. [1] Separating the energy plant from the property owner may create a specialized operating structure in which an energy company manages performance while the building owner pays for delivered thermal service.

Such models could help developers overcome the challenge of managing unfamiliar equipment. They may also allow geothermal providers to build portfolios of systems and attract investment based on recurring energy-service revenues.

A More Resilient Urban Energy Strategy

Geothermal systems can contribute to urban resilience because they reduce dependence on on-site fuel combustion and provide a stable source of heating and cooling. When paired with efficient electric equipment, they can help buildings maintain comfort during volatile energy-market conditions.

Their resilience benefits are not automatic. A geothermal building still depends on electricity, meaning grid outages can affect pumps, controls and heat-pump operation. Developers may therefore need emergency generation, battery storage or other backup systems to maintain critical functions.

Even so, the technology offers an important pathway for reducing direct fossil-fuel use in cities. It can also support improved indoor air quality by eliminating combustion appliances inside apartments and reducing local emissions associated with building heating.

For Chicago, the significance of 410 N. Elizabeth Street lies partly in its visibility. A 33-story residential tower makes the technology difficult to dismiss as a niche solution for small offices, schools or suburban homes. If the system performs as projected, it could influence future design decisions across Fulton Market and the wider metropolitan region.

The Future of Geothermal High-Rises

The 410 N. Elizabeth Street tower will not solve every challenge associated with urban decarbonization. Its projected savings will need to be confirmed through actual operating data, and the project will still depend on the carbon intensity and reliability of the electricity grid.

Nevertheless, the development represents a meaningful shift in how urban energy systems can be designed. Instead of treating heating and cooling as separate equipment decisions, geothermal integrates the building with the stable thermal conditions beneath the site.

The project also shows how climate-focused infrastructure can align with commercial development. Energy efficiency, lower operating costs, affordable housing and public space are being pursued within the same high-density project.

If Chicago’s first major geothermal multifamily high-rise delivers reliable comfort and predictable costs, the impact could extend well beyond one building. It could encourage lenders to support similar projects, give developers greater confidence in urban drilling and help city planners consider shared geothermal networks.

As cities seek to decarbonize while continuing to build housing, the ground beneath urban neighborhoods may become an increasingly valuable energy resource. At 410 N. Elizabeth Street, Chicago is testing whether that resource can help define the next generation of high-rise development.

Related: Europe Geothermal Energy Investment Opportunities, Companies, Resources, and Market Outlook

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 Source: News Tribune