OTTAWA -- The federal government topped up its housing and infrastructure plans in Monday's budget, but held back on an overhaul as homes and cities grow increasingly unaffordable.

In the first budget in more than two years, Finance Minister Chrystia Freeland refreshed the Liberals' 10-year, $40-billion housing strategy with an additional $2.5-billion commitment.

Some 60 per cent of that will go toward construction of at least 4,500 new units under the Rapid Housing Initiative, which seeks to provide vulnerable Canadians with affordable homes.

The budget's plan to build or repair 35,000 units in total -- with the help of a reallocated $1.3 billion in existing funding -- makes only a small dent in the more than 1.6 million Canadians who live in inadequate or unaffordable housing, according to budget figures.

"There's more money on the table for affordable housing. Is that a major change? I don't think so," said Genevieve Tellier, a political science professor from the University of Ottawa.

"It's not a big amount in the sense that the needs of Canadians are much higher than that."

Garth Frizzell, president of the Federation of Canadian Municipalities, said he welcomed the revamped Rapid Housing Initiative. "But to meet our shared goal of ending chronic homelessness much more will need to be done," he said in a statement.

Vancouver Mayor Kennedy Stewart, who leads a city that frequently tops lists of Canada's priciest real estate, said the budget is a "welcome blueprint" for municipal-federal interaction.

He highlighted the $1.5 billion pegged for the Rapid Housing Initiative -- 25 per cent is slated to go toward women's housing -- more than a half-million dollars to fight homelessness and a new national tax on vacant homes that targets investors looking to park their cash in bricks and mortar.

Jeff Morrison, who heads the Canadian Housing and Renewal Association, said the budget is a "disappointment."

"Overall, the new investments in affordable housing only scratch the surface compared to the need," he said, calling for an urban and rural Indigenous housing strategy.

Freeland brushed off past complaints that the housing scheme's 12-month construction timeline is too short.

"Part of the point of the Rapid Housing Initiative is for it to do what the name says. We really believe it's important to get some housing created quickly, and that's what this program has been designed to do," she told reporters.

The 739-page document also reiterates an eight-year, multibillion-dollar pledge in February for public transit projects ranging from new subway lines to electric buses.

Prime Minister Justin Trudeau promised cash-strapped cities $14.9 billion in permanent funding for transit, though most of the money won't start flowing until later in the decade.

About $6 billion will be made available to municipalities right away for projects that are ready to go, according to the government, while the remainder will go into a $3-billion-per-year fund that can will be doled out on a project-by-project basis starting in 2026-27.

The budget further sets aside $23 million over four years for Infrastructure Canada to conduct what it calls the country's first-ever national infrastructure assessment, partly to identify next steps toward a long-discussed, never-developed high-frequency rail link between Toronto and Quebec City.

It also commits an additional $1 billion over six years to hasten access to high-speed internet in rural and remote communities.

This report by The Canadian Press was first published April 19, 2021.