You may not need planning permission—but it can still be worth having the paperwork to prove it.
Some home extensions, alterations and outbuildings can be completed under permitted development rights, without making a full planning application. However, that does not automatically provide formal confirmation that the proposal is lawful.
A Lawful Development Certificate allows the local authority to assess a proposal against the relevant legal tests. Unlike a planning application, the council is not deciding whether the design is acceptable in planning terms; it is confirming whether the proposed work falls within permitted development rights.
The answer can vary between apparently similar projects. The size and position of the proposal, the type and location of the property, its planning history and any restrictions affecting its permitted development rights must all be considered.
For clients, obtaining a certificate before construction can provide useful certainty and create a formal record for the property. This may also be valuable when the house is later sold, remortgaged or reviewed by a solicitor or lender.
Is a certificate always necessary?
Not always. However, when a project relies on permitted development rights—particularly where it is close to the relevant limits—a Lawful Development Certificate can provide reassurance before building work begins.
It is also important to remember that a certificate only confirms the position under planning legislation. Building Regulations approval, structural calculations, Party Wall matters and other property-specific permissions may still be required.
Donna Barnes Designs can review the property and proposed work, establish the appropriate planning route and prepare the drawings and supporting information required for a Lawful Development Certificate application.
Planning work under permitted development? Get in touch to discuss the correct route before you build.