Great question — answering as the UphillTech team:
Google provides an option to include a service area for hybrid businesses. Hybrid business: A business that serves customers at their business address, but also directly visits or delivers to customers. If your business doesn’t have permanent on-site signage, it's not eligible as a storefront and should be listed as a service-area business. There's instructions on how to activate this under the manage service areas of your business section.
Full answer by Pete: https://webmasters.stackexchange.com/a/142946 (CC BY-SA 4.0).
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