A licence to alter (also known as a ‘licence for alterations’) is a formal legal document that’s often required to allow leaseholders to make certain changes to their leasehold property.
A leasehold property is leased from the freehold owner (ie the person or business that owns the whole property and the land it is built on indefinitely). The owner of the leasehold owns their interest in the property, but not the land, for a fixed term (eg 10 years or 99 years). For more information, read Freehold and leasehold property.
A licence to alter sets out the conditions under which alterations can be made to leasehold property by the leaseholder, to help ensure that unexpected conflicts related to the work can be avoided. These documents are often required for long-term leaseholders (eg people that would day-to-day be considered to ‘own’ a property as they hold a leasehold of it for a long time, eg 50 years).
This Landlord Consent to Alterations Letter is not a licence to alter. If you require a licence to alter, Ask a lawyer for more information.