A design project is the concept of a future interior, with detailed technical information on how to bring it to life. A design project is needed not only to save time and money, but also to save your nerves and keep you in a good mood.
Anyone who has renovated their home or a commercial space (an office or a store) without a detailed plan of action knows how hard, and sometimes impossible, it is to manage without a design project.
Even when an interior designer wants to do something for themselves, they start with a design project.
Of course, you can take the risk and try to bring your ideas and vision of the future interior to life on your own, explaining to builders or craftsmen what you need in words or with pictures downloaded from the internet. But experience shows that it's better not to experiment, because in the end you won't get what you wanted, and the wasted money and precious time can't be recovered.
So rather than learning from your own mistakes, trust an experienced interior designer.
Yes, an interior designer's services are not free, and it's up to you whether to spend a modest amount (on average 5% of your total renovation budget) on a functional, stylish design and lasting comfort.