Planning Applications HomePlanning Applications What are Planning Applications? While internal changes don’t need planning permission, external ones do. Whether you want to add a new extension to your house or change the use of it, you’ll need to submit a planning application. Our Planning Applications Householders ApplicationsFull Planning ApplicationsNew Build ApplicationsDischarge of ConditionsSection 73 Applications. (S73)Prior Notifications Established Use ApplicationsChange of Use ApplicationsLawfulness Development Certificates (LCD)Planning AppealsEnforcement CasesPlanning/ Enforcement Appeals