Your rent just might take a boost this year. Here's why.

• Author: Veiga, Alex
• Position: Homes

Byline: Alex Veiga

LOS ANGELES -- Living in an apartment? Expect your rent to go up again.

Renting has gotten increasingly expensive over the last five years. The average U.S. rent has climbed 14 percent to $1,124 since 2010, according to commercial property tracker Reis Inc. That's four percentage points faster than inflation, and more than double the rise in U.S. home prices over the same period.

Now, even with a surge in apartment construction, rents are projected to rise yet another 3.3 percent this year, to an average $1,161, according to Reis. While that's slower than last year's 3.6 percent increase, the broader upward trend isn't going away.

''The only relief in sight is rents in the hottest markets are going to go up at a slower pace, but they're still going to go up,'' says Hessam Nadji, chief strategy officer at Marcus & Millichap, a commercial real estate services firm.

The main reason: More people than ever are apartment hunting.

Young people who have been living with their parents are increasingly finding jobs and moving out. Rising home prices are leading many longtime renters to stay put.

In addition, most of the new apartments coming on the market are aimed at affluent tenants and carry higher-than-average rents. That's especially true in cities where new buildings are going up in urban core areas, which means builders need to recoup higher land and development costs.

Consider Denver, where rents have increased more than 5 percent a year since 2010 -- 9.2 percent in 2014 -- according to Marcus & Millichap.

Of the 9,400 new apartment units added last year, 23 percent were in urban core areas.

Competition for apartments means renters are less likely to be able to negotiate with landlords, or win concessions such as a free month's rent.

Here's a closer look at why apartment dwellers will probably see rents go up for a sixth straight year.

MORE JOBS, MORE COMPETITION

During the last recession many workers who lost their jobs moved in with relatives or took on roommates. About 32 percent of U.S. adults were living with roommates or adult family members in 2012, up from 27.4 percent in 2006, according to Zillow, an online real estate firm.

Stepped-up hiring has begun to reverse that trend. About 2.8 million more Americans have jobs than 12 months ago.

''The share of young adults with jobs has climbed in the past year, and that will help many of them move out of their parents' homes,'' says Jed Kolko, chief economist at online...