Handling packages at multifamily communities has become a big issue.

Apartment building mail rooms are being overrun with package deliveries after Cyber Monday deals hit the web earlier this week. But, landlords are struggling to find room for all the deliveries, reports CNBC's Diana Olick.

"In our portfolio, which is 11,000 units in operation right now and 4,000 under development, this year we have an estimated 300,000 packages coming in," said Mark Alfieri, CEO of Monogram Residential Trust , which owns and manages Bailey's Crossing. "It's become a real challenge for the industry over the last several years as online shopping has increased."

With 10% of all retail now consisting of online shopping, apartment communities are looking for package storage alternatives for residents. Package lockers, such as ones created by LuxorOne, which allow delivery people to log deliveries on an iPad and drop packages in a locker for tenants to pick up, seem to be a popular solution. 

A typical apartment community receives more than 100 packages a week and that number can more than double during the holidays, according to a 2014 survey by National Multifamily Housing Council. One in 4 apartment communities use specialized software to manage packages on site. Still, at the end of last year, just 1 in 10 were using package lockers.

Though some of these package systems can come at a high price—LuxerOne can range from $21,000 to $34,000 to install—property owners say it's worth the extra cost to keep residents happy, and reduce inefficiency and clutter. 

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