Planning restrictions on home and business extensions are to be eased by the Government as part of a package of measures to help kick-start the economy, David Cameron and Nick Clegg are due to announce.
The coalition Government wants to make it easier for tens of thousands of families and companies to expand their properties, giving a much-needed boost to economic activity.
Another 16,500 first-time buyers are also to receive help getting on the housing ladder under an extension of the FirstBuy scheme to be announced by the Prime Minister and his deputy.
Would-be homeowners without a deposit are given an equity loan of up to 20% of the purchase price under the scheme.
The Prime Minister will say: "This government means business in delivering plans to help people, build new homes and kick-start the economy.
"We're determined to cut through the bureaucracy that holds us back. That starts with getting the planners off our backs.
"Getting behind the businesses that have the ambition to expand. And meeting the aspirations of families that want to buy or improve a home."
Homeowners and businesses will, for a limited time, be able to build much bigger extensions without planning permission than at present, under the changes to be unveiled.
The new Permitted Development Rights will make it easier to install conservatories and loft extensions without going through weeks of planning bureaucracy and form-filling.