Plan and implement additional cleaning protocols for more frequent services. Visible cleaning is good, shows you are being proactive (cleaning elevator buttons, door handles, etc.)
Update your communications protocol to communicate best hygiene practices as well as taking steps should someone be infected.
For your own firm, conduct preparedness tests, e.g. everyone/many people works from home on one day. Implement lessons learned from the test.
Keep work surfaces (e.g. desks and tables) and objects (e.g. telephones, keyboards) clean & hygienic. Wipe with disinfectant regularly.
Promote regular and thorough hand-washing (employees, contractors and customers).
Consider impacts of COVID-19 on the following:
Business continuity: How to react if there is a confirmed case in your building.
Organizational continuity: Align your internal policies with best practice recommendations to ensure you are morally and legally protected.
Commercial leases: Based on your lease, what can you require from tenants if there is a health emergency?
Supply chain: Look at your supply chain and plan what you might need (e.g. additional sanitizer) in 1 month, 2 months.
Extreme pandemic: Though extremely remote, legislation may enable authorities to shut down and/or otherwise deeply affect your building. Engage with your legal department proactively.
Intolerance: If there is an incident of intolerance (e.g. harassment at a Chinese restaurant/tenant), be ready with messages of tolerance and support. Ensure security personnel and staff have been trained to react appropriately to individuals exhibiting harassing or intolerant behaviour towards someone due to ethnicity and perceived increased risk.
As summer arrives, consider plans for tenant appreciation events including if they should happen, if hosting them will send confusing messages. Consider ways to replace the appreciation should you decide to forgo them.