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The Ultimate Winter Commercial Property Maintenance Checklist Every Manager Needs






Winter in Southern California is not synonymous with snowstorms, freezing temperatures, or blizzards, but it does come with its own set of challenges. The cooler temperatures, heavy rains, and the occasional unexpected weather event can lead to significant damage to commercial properties if they are not properly prepared. While we may not need to worry about snow accumulation, property managers and owners should remain vigilant and proactive to ensure their buildings are winter-ready.


As a commercial property maintenance contractor with over 3 decades of experience working throughout Southern California, we have witnessed firsthand how simple, proactive maintenance steps can prevent expensive repairs, improve energy efficiency, and ensure tenants remain comfortable and happy. In this article, we will explore the ten essential steps every property manager and owner should take to prepare their commercial properties for the winter season. By following these steps, you’ll safeguard your investment and avoid unnecessary headaches.


1. Inspect and Repair the Roof

Why It Matters in Southern California While snow accumulation is not a concern, heavy rainfall is a frequent issue during the winter months. A well-maintained roof is essential for keeping rainwater from infiltrating your commercial property. Flat roofs, which are common in Southern California, are particularly susceptible to pooling water, which can lead to leaks, structural damage, and mold growth. Without a comprehensive roof inspection, minor problems can quickly escalate into expensive repairs.

What to Do:

  • Clear debris: Remove leaves, branches, and dirt from both the roof and drainage systems. Blockages can lead to water pooling on the roof and possibly seeping into the building.

  • Inspect for damage: Look for cracks, punctures, or worn areas in the roofing material that might be more susceptible to leaks.

  • Schedule a professional inspection: It’s always a good idea to schedule a thorough inspection with a roofing expert. They can identify hidden problems, such as weakened flashings or worn materials, which can prevent major damage in the future.

Anecdote: A shopping plaza client in Temecula contacted us after a heavy rainstorm revealed a roof leak that seeped into tenant spaces, damaging inventory. Had regular roof inspections been part of their routine maintenance checklist, this costly issue could have been avoided altogether.


2. Clean and Maintain Gutters and Downspouts

The Rainy Season’s Impact While Southern California may not experience snow, we do have our fair share of heavy rain, especially during the winter months. Clogged gutters can easily lead to water overflow, causing damage to your property’s siding, foundation, and landscaping. Ensuring that gutters and downspouts are clear and functioning correctly is a vital step in your winter maintenance preparations.

What to Do:

  • Clear out debris: Remove leaves, dirt, and other debris from gutters to allow rainwater to flow freely.

  • Check for proper drainage: Ensure that downspouts are directing water away from the building’s foundation. Clogged downspouts can lead to water pooling around the base of the building, which could cause structural damage over time.

  • Add gutter guards: Installing gutter guards can reduce the frequency of cleaning by preventing debris buildup, saving you time and effort throughout the rainy season.

3. Seal Windows and Doors

Keeping Energy Costs Low Although Southern California is known for its mild winter temperatures, the nights can still get chilly, and during this time, energy efficiency is key. Drafty windows and doors can lead to unnecessary heating costs, making your building less energy-efficient and less comfortable for tenants. It’s important to check and seal windows and doors to prevent drafts and minimize energy loss.

What to Do:

  • Inspect for drafts: Check around windows and doors to see if cold air is seeping in. Drafts not only reduce comfort for tenants but can also significantly increase heating bills.

  • Apply weatherstripping and caulk: Seal the gaps to improve energy efficiency and ensure the building remains warm. Weatherstripping is easy to apply and can make a big difference in preventing cold air from entering.

  • Upgrade if needed: If your windows are old and inefficient, consider replacing them with modern, energy-efficient models. Newer windows often provide better insulation and can help maintain a consistent indoor temperature.


4. Service the HVAC System

Why HVAC Maintenance Is Critical As winter temperatures dip, your tenants will rely more heavily on the building’s heating system. A malfunctioning HVAC unit can lead to tenant complaints, higher energy costs, and, in some cases, significant downtime while repairs are made. Preventative HVAC maintenance is a crucial part of your winter preparation checklist, as it ensures the system is running efficiently and effectively.

What to Do:

  • Replace filters: Dirty filters cause HVAC systems to work harder, which can reduce efficiency and increase energy costs. Replacing filters ensures better airflow and reduces strain on the system.

  • Check for issues: Have a professional inspect your HVAC system to check for potential issues such as leaks, thermostat malfunctions, or ductwork problems.

  • Test heating modes: Before the cold weather sets in, test the heating function to ensure the system works properly. An HVAC system that’s not functioning correctly can lead to tenant complaints and costly emergency repairs.

Anecdote: One of our office park clients in Riverside saved thousands in energy costs after a pre-winter HVAC inspection revealed duct leaks. These leaks were wasting heated air, and sealing them greatly improved the building’s overall energy efficiency.



5. Winterize Outdoor Plumbing

The Risk of Cool Desert Nights Southern California’s winters are generally mild, but certain areas, such as the Inland Empire and high desert regions, can experience overnight freezes that threaten outdoor plumbing. Outdoor plumbing is especially vulnerable to freezing conditions, which can cause pipes to burst or crack, resulting in costly repairs. Make sure to include winterizing outdoor plumbing in your maintenance checklist.

What to Do:

  • Insulate exposed pipes: Use foam insulation or pipe sleeves to protect outdoor plumbing from freezing.

  • Shut off unused water lines: Irrigation systems and other outdoor water lines may not be needed in the winter months. Shut them off and drain the lines to prevent freezing.

  • Drain hoses and faucets: Disconnect garden hoses and drain water from faucets to avoid freezing.


6. Maintain Parking Lots and Walkways

Preventing Hazards During Winter Rains During the winter, wet surfaces can become slippery, creating potential hazards for tenants and visitors. Cracks and potholes in parking lots and walkways are more likely to worsen with the exposure to rain, and untreated damage can turn into major repairs. Ensuring parking lots and walkways are safe should be a priority in your winter maintenance preparations.

What to Do:

  • Repair damage now: Patch cracks and potholes in parking lots and walkways before water seeps into the cracks and causes more extensive damage. This proactive approach helps prevent more costly repairs in the future.

  • Add non-slip treatments: Consider applying a non-slip treatment to walkways to improve traction during wet weather. This can help reduce the risk of slip-and-fall accidents.

  • Inspect drainage: Ensure that parking lot drains are clear of debris and functioning properly to prevent water from pooling and creating hazardous conditions.

7. Inspect Emergency Systems

Preparation for the Unexpected Winter storms can occasionally cause power outages, flooding, or other emergency scenarios. It’s essential to ensure your property is ready for these types of situations by reviewing and testing emergency systems. This preparation helps protect both your property and your tenants.

What to Do:

  • Test generators: Make sure backup generators are operational, and fuel levels are sufficient to power essential systems during a power outage.

  • Inspect emergency lighting: Ensure emergency lighting and exit signs are working properly to guide tenants to safety in case of an emergency.

  • Review emergency plans: Share emergency plans with tenants, including evacuation routes and how to report hazards.


8. Check Insulation

Comfort and Efficiency Go Hand-in-Hand Proper insulation is essential to maintaining a comfortable indoor temperature during the winter months. Insulation also helps keep heating costs down, which can be a concern for both property managers and tenants. By checking your property’s insulation, you’ll ensure energy efficiency and comfort throughout the winter season.

What to Do:

  • Inspect insulation: Check attics, walls, and crawl spaces for gaps or areas where insulation may have settled or deteriorated. These areas can cause temperature fluctuations within the building.

  • Add or replace insulation: Focus on areas where you notice temperature inconsistencies. Proper insulation can help maintain a comfortable environment for your tenants and reduce energy costs.


9. Secure Entryways and High-Traffic Areas

Safety First Rainy weather can make entryways and high-traffic areas slick, increasing the likelihood of slip-and-fall accidents. Ensuring that these areas are properly maintained and safe should be a priority, particularly during the rainy season.

What to Do:

  • Add mats: Place non-slip mats at all entrances to prevent accidents and help keep water from being tracked inside.

  • Install signage: Use “Caution: Wet Floor” signs during rainy conditions to alert tenants and visitors to the potential hazards.

  • Check doors: Make sure doors close securely to prevent drafts from entering and creating uncomfortable temperatures in the building.


10. Partner with a Professional Maintenance Provider

Why Expert Help Matters Winterizing a commercial property requires expertise and attention to detail. Partnering with a professional maintenance provider ensures your property receives a comprehensive review and maintenance plan to tackle issues you may not even have noticed. Working with a trusted contractor ensures that all aspects of your property are prepared for the winter season.

What to Do:

  • Schedule inspections: Have professionals review key systems, such as roofing, plumbing, and HVAC, to catch any potential issues before they become costly problems.

  • Bundle services: Many maintenance providers offer service bundles for seasonal tasks, such as gutter cleaning, HVAC inspections, and parking lot repairs, providing you with more comprehensive care.

  • Build a relationship: Work with a reliable contractor who is familiar with your property and can provide quick, effective responses to emergencies.


A retail center owner in Murrieta avoided a tenant dispute over HVAC downtime last winter by scheduling routine inspections with our team. The inspection revealed issues with their HVAC system that were addressed before the issue worsened, preventing disruptions in their operations.



While Southern California may not face extreme winter weather, it still presents unique challenges that can lead to costly repairs and tenant dissatisfaction. By following these essential winter commercial property maintenance steps, you’ll protect your investment, enhance tenant comfort, and avoid preventable headaches. Don’t wait until the first storm hits—take action now to winter-proof your property and ensure a smooth, problem-free season.


Ready to implement your winter commercial property maintenance checklist? Contact us today for a consultation and discover how our expert services can simplify your winter property preparations.


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