All applications must be accompanied by a site location plan and a block plan. You can buy both types of plan through the Planning Portal. A site location plan (sometimes called a ‘location plan’) shows the proposed development in relation to its surrounding properties. It must be based on an up-to-date map and at an identified standard metric scale (typically 1:1250 or 1:2500). The site of the proposed development needs to be outlined in red and any other land owned by the applicant that is close to or adjoining the site needs to be outlined in blue. A block plan (sometimes and confusingly called a ‘site plan’) shows the proposed development in relation to the property boundary. Block plans are typically submitted at a scale of either 1:200 or 1:500 and should include the following: The size and position of the existing building (and any extensions proposed) in relation to the property boundary The position and use of any other buildings within the property boundary The position and width of any adjacent streets If you are not sure whether your plans are suitable or require further assistance you should contact your local planning authority for advice. You can find contact information for your local planning authority on the Portal. You can purchase a site location plan and a block plan from one of the Planning Portal’s accredited suppliers.