Colorado aims to increase housing supply with new single stairway building code

House Bill 1273, introduced in the Colorado State Legislature on February 19, 2025, aims to address the pressing need for increased housing supply through innovative construction designs for small multifamily buildings. The bill seeks to allow the construction of buildings with a single stairway, a practice that has been linked to improved housing options and enhanced quality of life.

The legislation is grounded in data from the Center for Fire Statistics, which indicates that Colorado has a higher rate of fire deaths per 100,000 inhabitants compared to many countries that permit single stairway construction for buildings exceeding three stories. Proponents argue that allowing single stairway designs can lead to more efficient use of space, particularly in urban areas where land is limited. The bill highlights the potential for these designs to support better indoor air quality and energy efficiency by facilitating cross ventilation.

Key provisions of House Bill 1273 include the establishment of guidelines for the construction of small multifamily buildings, particularly in urban infill areas. The bill is supported by 18 accredited fire agencies in Colorado, which emphasize the importance of community-oriented and data-driven approaches to building safety and design.

However, the bill has sparked debates regarding safety concerns associated with single stairway buildings. Critics argue that such designs could pose risks in emergency situations, potentially complicating evacuation efforts. As the International Code Council works on drafting a new code to accommodate these construction options, the discussions surrounding House Bill 1273 are expected to continue, with stakeholders weighing the benefits of increased housing supply against potential safety implications.

The significance of this bill lies in its potential to reshape housing development in Colorado, particularly in urban areas with growing populations. If passed, House Bill 1273 could pave the way for more flexible construction practices, addressing both housing shortages and urban planning challenges. The next steps will involve further legislative discussions and potential amendments as lawmakers consider the balance between innovation in housing design and public safety.