Designers Colin and Justin are backing the campaign

The campaign is being backed by celebrity interior designers Colin and Justin, who urged the public to show their support.

The charity is calling on the Scottish Executive to fund the additional homes over three years, which it said would cost less than 1% of Scotland's budget.

The executive said that it had doubled affordable housing spending since 2003.

Shelter Scotland will present its case at a Scottish Parliamentary reception.

Archie Stoddart, the charity's director, said: "We cannot continue to brush housing need underneath the carpet.

Charity sticker

"Housing is central to all of our lives and yet it fails to be central to our spending priorities.

"Without 30,000 affordable rented homes by 2012, Scotland's internationally applauded homelessness target might be under threat and we will continue to see thousands of people stuck on waiting lists or in temporary housing.

"Building these new homes will benefit people in so many ways."

Decisions on spending beyond 2008 will be taken by the next administration Scottish Executive 'We cannot ignore housing need'

Celebrity designers, Colin McAllister and Justin Ryan, who recently worked on the renovation of a housing estate for a Channel 5 reality programme, claimed everyone had the right to a decent home.

People are urged to show their support for the "It's time to get a move in" campaign by displaying a charity sticker on their front door.

An executive spokesman said: "We have doubled investment in affordable housing since 2003.

"Our �1.2bn programme is providing 21,500 good quality affordable homes over three years.

"We are determined to maintain this progress and are working with local authorities, housing associations and others to free up more land and investment. There can be no let up."

He added that this year alone �487m was being invested to provide 7,100 homes.

In addition, he said a record share of that was going to rural housing with �139m - nearly 30% of the spending - going to such areas.