Yes, Rancang&Bangun is a free to use platform developed by Holcim to ensure that potential homeowners are fully equipped with necessary informations to start building their house. All you need to do is sign-up using your email or mobile number.
Not necessarily, you can use the budget estimator without signing-up. But in order for you to be able to save your projects, share your projects and create a more detailed estimations, you do need to sign-up. Which is quick and easy.
Yes you can. You can create as many projects as you want. We actually encourage you to create more than one project with different specifications so you can compare different build and pick the right one in terms of layout and budget.
We try to research and gather as much data as we can, from areas all over Indonesia, and we keep adding more data to improve the platform. So overall, the budget estimation accuracy is quite good, with around 5-10% margin of errors.