The Ernst & Young Item Club said the UK's recovery has "finally got legs", as it almost doubled its forecast for growth this year to 1.1%, up from 0.6% just three months ago.
Government schemes will continue to spur the housing market, it said, but added that consumers will fund higher spending by dipping into their savings, rather than through a big increase in household incomes.
However, Item said a rebalancing of the UK economy remains unlikely this year, with subdued exports and growth driven by consumers.
It expects a long-awaited revival in exports and business investment next year, reflecting a recovery in the United States, pro-growth policies in Europe and a shift towards consumption in China.
Professor Peter Spencer, chief economic adviser to the Item Club, said: "It's looking much more positive and we're unlikely to see a repeat of 2011 when a recovery in confidence was crushed by the euro crisis.
"Spending on the high street is holding up nicely, housing market transactions are beginning to gather pace and, perhaps most significantly, the global economy also appears to be on the mend."
Help to Buy allows people to buy a home with a 5% deposit, aided with a loan of up to 20% from the Government. It will be extended next year to include a state guarantee for mortgages.
Funding for Lending has helped drive down mortgage rates and increase availability of higher loan-to-value deals, by offering banks and building societies discounted funding in return for increases in lending.