Rowhouses are everywhere in older cities and growing metro areas, but their familiarity can be misleading. Behind the uniform brick fronts and narrow footprints lies a structure type that has repeatedly challenged firefighters and contributed to serious injuries and line-of-duty deaths. Understanding how these buildings are constructed and how fire behaves inside them is critical to improving outcomes.
Built for density and fire extension
Rowhouses (also called townhouses or attached dwellings) are typically multi-story residential structures connected side by side, sharing common walls. While those party walls are intended to limit the spread of fire, they often contain voids and hidden pathways that allow fire to travel horizontally and vertically between units.
According to NIOSH, fire can spread through cocklofts, pipe chases and other concealed spaces, sometimes affecting multiple homes before it is detected from the interior. This creates a situation where what appears to be a single-unit fire can quickly become a block-wide problem.
The Fire Safety Research Institute (FSRI) reinforces this concern, noting that multi-story residential structures, including rowhouses, can support complex fire dynamics, especially when fire spreads through concealed voids and between floors. These pathways allow fire to bypass interior barriers and rapidly change conditions beyond the initial fire area.
Interior layout: Limited access, high risk
Rowhouses are typically narrow, with a front entrance and a rear exit, connected by a single stairwell that runs vertically through the structure. This layout limits access and egress for both occupants and firefighters.
NIOSH highlights that these constraints can complicate fire attack, search and rescue, and ventilation operations. Crews operating above or below the fire may have only one interior path for escape, increasing the risk if conditions deteriorate.
Basements add another layer of hazard. NIOSH identifies basement fires in rowhouses as a significant risk factor, as fire can quickly spread upward through the structure while weakening floor systems. This combination increases the potential for rapid fire progression and structural collapse.
Fire behavior: Fast-changing and unforgiving
Rowhouse fires often involve hidden fire spread, which delays recognition and allows conditions to worsen before crews can intervene. The IAFF notes that these fires can escalate quickly, particularly when fire extends into void spaces or the attic.
FSRI research into multi-story residential fires underscores how ventilation and flow paths can intensify fire behavior. Opening doors or windows, especially in a vertical layout, can introduce air that accelerates fire growth and pushes heat and smoke through stairwells and adjoining spaces.
This means that even routine actions, if not coordinated, can rapidly change interior conditions and place crews at risk.
Tactical priorities: Coordination is everything
Across NIOSH, IAFF and FSRI guidance, a consistent theme emerges: success at rowhouse fires depends on disciplined, coordinated operations.
1. Size-up and situational awareness
A thorough size-up must consider fire location, building layout, potential for extension and access limitations. Because fire may already be in concealed spaces, crews must anticipate conditions beyond what is visible.
2. Hoseline placement and fire attack
NIOSH emphasizes the importance of proper hoseline deployment to control the fire quickly and prevent extension. Attack lines must be positioned with an understanding of how fire may be moving through the structure, not just where it is visible.
3. Control of flow paths
FSRI research highlights the need to manage ventilation and openings carefully. Uncontrolled ventilation can intensify fire conditions, so coordination between fire attack and ventilation crews is essential.
4. Checking for extension
Given the likelihood of hidden fire spread, crews must open walls and ceilings as needed to locate and stop extension—particularly into the attic or adjoining units.
5. Basement fire considerations
Basement involvement requires caution due to the risk of rapid upward fire spread and compromised floor integrity. Tactics must account for limited access and the potential for collapse.
6. Maintaining egress
With limited interior exits, establishing and preserving secondary means of egress, such as ground ladders, is critical to firefighter safety.
Training and preplanning matter
Rowhouses are predictable in appearance, but not in behavior. Their shared construction, concealed spaces and limited access points create an environment where fire can spread rapidly and conditions can deteriorate with little warning.
The takeaway from NIOSH, IAFF and FSRI is clear: rowhouse fires demand a coordinated, disciplined approach grounded in a strong understanding of building construction and fire dynamics. When crews anticipate the hazards and operate with intent, they are far better positioned to control the fire — and protect themselves in the process.
FireRescue1 is using generative AI to create some content that is edited and fact-checked by our editors.
