Whenever a landscaping project is started, it is usually the case that a contract will have been signed between the landscaping company and the client.
That applies whether the grounds being landscaped are commercial or it is a residential client wishing their garden to be transformed.
If you own or run a landscaping business, you will likely be closely involved in the contracts created for clients. Each of these will be unique in the sense that no two projects will be the same, regardless of any recurring landscaping features which you are usually asked to create.