"How quickly public health improves and if it can be sustained remain the biggest unanswered questions for determining the pace of economic and retail recovery," Cushman & Wakefield says.

Commercial properties are currently under the protection of Prop 13, but a new ballot measure seeks to divide the tax policy.

Deal volume should return to normalcy in 2021, according to Colliers International's Investor Sentiment Survey.

Breakthough Properties has executed a 263,500-square-foot lease for its laboratory development, which is slated for completion in early 2022.