Washington ? The cost of rent and utilities for a typical two-bedroom apartment has increased more than a third since 1999, making such housing unaffordable for anyone earning minimum wage, according to a study by an advocacy group for low-income housing.

A worker must earn at least $15.21 an hour to afford the average cost of $791 per month and have enough left for food and other necessities, the Washington-based National Low Income Housing Coalition said Monday. Five years ago the average cost for housing and utilities was $576.

The federal minimum wage of $5.15 an hour, which has not increased since 1997, is barely one-third of the housing wage of $15.21 an hour. States have the discretion of setting higher minimum wages, and 11 states have done so. Alaska has the highest minimum wage at $7.15.

With the nation’s economy still struggling, coalition president Sheila Crowley said she expected more people would be forced to live in substandard housing or to move in with others.

“I can’t say there’s any real good news here,” Crowley said.

Crowley criticized the Bush administration and Congress for not spending more on affordable housing.

The Department of Housing and Urban Development had no immediate comment on the report.

In its latest budget request, HUD asked for an increase of $113 million to $2.2 billion for a program that would give communities freedom to decide how best to solve affordable housing problems, such as rehabilitation of old buildings or buying land to erect new housing. Also, HUD has proposed initiatives it says would reduce regulatory barriers for communities to develop affordable housing.

There are about 36 million renters in the United States, comprising about one-third of all households.

Findings from the annual report are based on the group’s analysis of data from the Census Bureau and HUD’s calculations of fair market rents in each state, county and metropolitan area. The fair market rent is the cost of housing plus utilities.

Each jurisdiction’s “housing wage” was established by calculating how much a person must earn per hour to spend no more than 30 percent of income on housing. HUD considers housing affordable if costs do not exceed 30 percent.

The median national housing wage of $15.21 an hour is slightly less than the median hourly wage of roughly $15.40 for a full-time U.S. worker this past July, according to the Bureau of Labor Statistics. The coalition found that the housing wage increased 4 percent since 2002, from $14.66.