Top 31 Building Custodian Interview Questions and Answers [Updated 2026] + Practice With AI Feedback

In my last job, we had a large winter storm that caused significant snow accumulation. I worked closely with the maintenance team to clear the snow from the sidewalks and entrances. I coordinated with coworkers to ensure everyone had the right tools and we divided the areas to clear. Together, we made sure the building was accessible and safe for all visitors by the end of the day.

When a water leak occurred in the building, I immediately called my supervisor and provided details about the location and severity of the problem. I followed up with an email to the maintenance team to ensure everyone was informed and we could act quickly to resolve the issue.

In my previous job, the school had a special event. I arrived early to ensure everything was spotless, including extra cleaning of the restrooms and hallways. The principal praised my efforts for making the event successful and the attendees commented on how clean the space looked.

In my previous role as a custodian, the building underwent major renovations which changed our cleaning schedule. I quickly learned the new layout and adjusted my daily tasks to accommodate the construction, ensuring we still provided a clean environment for employees.

I once had a disagreement with a colleague about cleaning responsibilities. I approached them and suggested we sit down to discuss our concerns. We communicated openly and came up with a fair schedule that worked for both of us. This experience taught me the importance of discussing issues directly to find solutions.

In my previous job, I had to clean two large facilities and perform maintenance checks within a tight schedule. I listed the tasks and determined which facility had earlier deadlines. I prioritized the one that needed more immediate attention and communicated this to my supervisor, ensuring everyone was aligned. This resulted in completing all tasks on time.

In my previous role, I took the initiative to conduct weekly safety briefings to remind the team about proper lifting techniques and chemical handling. This helped reduce the number of minor injuries and improved our efficiency.

In my last position, a major plumbing leak occurred in the basement that threatened a lot of equipment. I first identified the source of the leak, then turned off the water supply. I worked quickly to remove any damaged materials and called a plumber to assist with fixing the pipe. After the repairs, I ensured everything was dry and restored to normal operations. This taught me the importance of quick action and communication when dealing with emergencies.

I noticed a new custodian struggling with the floor cleaning machine. I took the time to show them the proper technique and maintenance required. After a week, they felt much more confident and even received positive feedback from our supervisor on the quality of their work.

Upon discovering the leak, I would first locate the source and shut off the water supply. Then, I would inform my supervisor immediately and set up warning signs to keep others safe.

I would first listen to the tenant's concerns to understand the specific issues they are facing. Then I would inspect the common area to see what needs cleaning. After that, I would inform the tenant that I will have the area cleaned immediately and ensure regular maintenance plans are in place. Finally, I would check back with them after the cleaning is completed to ensure their satisfaction.

First, I would outline all necessary tasks, such as cleaning, setup, and equipment checks. Then, I would assign specific roles based on my team's strengths to ensure efficiency. We would create a timeline to track each task's progress and hold regular check-ins to address any challenges. Finally, before the event, I'd organize a final walkthrough to confirm everything is in place.

I would assess which task has a greater impact on safety and security, and prioritize that one first.

I would stop cleaning and carefully assess the hazard to ensure I'm safe. Then, I would report it to my supervisor immediately and use signage to warn others.

I prioritize my tasks each day and tackle the most urgent ones first. When unexpected issues arise, I reassess my schedule and see where I can make adjustments, ensuring I still meet my main responsibilities.

I would first cover the safety protocols, making sure the new custodian understands what to do in case of accidents. Next, I would explain the daily cleaning routines so they know how to keep the work areas tidy and safe. I would also show them how to use the equipment properly, like floor buffers and vacuums, and highlight areas that need extra care, like restrooms and kitchens.

I would first look for any spills or hazardous materials that need immediate attention. Then, I would focus on high-traffic areas where visitors frequently walk to keep them safe and comfortable.

I appreciate the feedback about my cleaning methods. I learned that while I was thorough, I could streamline my process to save time. I plan to adopt the new techniques suggested for better efficiency and I have already practiced implementing them on a trial basis with positive results.

I would quickly assess the situation to determine its urgency. Then, I would inform my supervisor about the request and ask if I should assist. If it’s safe and urgent, I’d help out immediately while keeping an eye on my original duties.

I would first stay calm and try to understand why my colleague is struggling. I would approach them and ask if they need help with their tasks. If they are overwhelmed, I would offer my support. If the situation doesn’t improve, I would let my supervisor know so that we can ensure everything is managed properly.

I would assess all tasks and prioritize those that have immediate impacts on safety or comfort. Then, I would discuss scheduling conflicts with my team to find a solution that works for everyone.

If I find a lost item, I will first check for any identification to see if I can determine the owner. Then, I will safely store the item in the lost and found area and inform my supervisor about it.

I would first remain calm and evaluate the situation. Then, I would identify what areas are most impacted and switch to manual cleaning methods or another piece of equipment if it's available. After that, I would inform my supervisor about the failure and my plan to manage the cleaning tasks.

For tile floors, I recommend a combination of sweeping and mopping with a mild detergent, while carpets should be vacuumed regularly and deep-cleaned with a carpet cleaner every 6 months. Hardwood floors require dusting and gentle mopping with a product specifically designed for wood.

Routine maintenance involves cleaning all common areas daily and ensuring restrooms are stocked and sanitized. I also ensure HVAC systems are inspected regularly to maintain good air quality.

First, I always wear non-slip shoes and ensure the area is clear for safety. I fill the buffer with the appropriate cleaning solution, adjust the pad for the specific floor type, and start on a lower speed before increasing it. After use, I clean the pads, check the machine for any issues, and store it properly.

I follow all safety protocols by reading the MSDS for each chemical to understand its hazards and required PPE, such as gloves and goggles. I also ensure that the area is well-ventilated while I am cleaning.

I keep an updated inventory list of all cleaning supplies and check it weekly. This helps me know when to reorder items before they run low.

In my previous job, I regularly changed light bulbs, unclogged toilets, and patched small holes in the drywall using spackle and sanding techniques.

I adhere to OSHA standards by ensuring proper use of PPE and cleaning agents. I follow CDC guidelines for cleaning high-touch areas, ensuring they are sanitized regularly to maintain a safe environment.

I prefer to use eco-friendly cleaning products which are safe for both the environment and occupants. I also make sure to recycle any materials I can, like paper and plastics, while using microfiber cloths to reduce waste.