What are the payment structures for buying property in Austria?

New build properties are paid for in stages and all payments are made through the notary who acts as trustee for your money. The instalments are made into a client account and the payments for each stage are only released to the developer when an independent surveyor has inspected each stage and officially signed it off with the notary.
 
Purchase payments will typically be something like this:

• 15% at start of building works
• 35% on completion of the shell and roof
• 20% on completion of plumbing and electrical installations
• 12% on completion of the façade & windows
• 12% on completion of the property
• 4% on hand over of keys
• 2% after three years (or after developer providing a bank guarantee or insurance to the purchaser)