"You're really limiting the reuse of the building," Voell says. "That's going to have some impact on sellers and new buyers." The new classification also could have an impact on tenants who may need to alter their business plan and offer services that require more workers.

"A tenant would want to safeguard their interests by negotiating a lease exit strategy," Voell says. If such a change occurs in a tenant's operating strategy, Torres says, the new zoning policy requires a property owner to readjust the property's site plan to provide the normal amount of parking required under existing industrial-use classifications."They'll have to re-site the plan for more parking; otherwise, they'll need a variance," Torres says.

Since telecom hubs typically require less parking than other industrial-use classifications, the Miami-Dade County Commission recently voted 11-0 to reduce the parking requirements on any site constructed to store "computer servers, communications routers, switches and similar machinery or equipment for directing or facilitating communications traffic."

The new classification requires one parking space per 2,000 sf of gross floor area. In comparison, traditional industrial-use projects must provide one parking space per 1,000 sf feet of gross floor area up to 10,000 sf, then one parking space per 2,000 sf thereafter.