@chrisdrobson
Geometra is an equivalent to a Building Inspector. They check on a property condition, legality, and compare it to the documents in the local municipal offices.
Our Geometra came with many-many wrong things, and we still were not able to back out of the purchase contract easily.
!First - never transfer money/deposit to the Seller - you would not get it back, if there is an issue. With very pricy and lengthy legal proceedings you might get a part, which will go to Lawyer, usually not enough to cover the fees.
Best do not give ANY deposit until due diligence. Never-ever listen that you have to give 20-50% to show that you are serious. It is a trick for International buyers, especially cash buyers. Italians do not give deposits, or few thousands euros at most.
Second - Make sure that your contract states that "after receiving the Geometra report, you have one or two month to do buyer's diligence and during this time you mantain the right to back up without any financial obligations." Our contract mentioned that "The Seller and Buyer has two month from Proposta (the offer) signing to confirm state of the property and if no objection, the Proposta (offer) automatically turns into the Preliminary(binding) contract after that period". We recieved the geometra report the night of the last day of 2 month-period. We saw that they're many discrepancies, called the agent, and agent told "Beautiful report, all things are so minor, we will explain all to you tomorrow". Next day our Proposta auto-turned to the Preliminary.
One very important thing to know - moment Proposta di Acquisto turns the Preliminary Contract - you loose the deposit AND will be responsible for the Agency Fees, if you decide to back out.Agency fees becomes an obligation at Preliminary, not on the completion of the deal, as in other counties. So. Be aware
Third - After you get a Geometra report, do your diligence yourself, without involving your Real-estate agents, who are, again, the interests party. Agent might tell things as : "not a big deal", "there is no legal houses in Italy", "it's different in here", "we will give you the very best contractors". Ask for the house tour with a Geometra, after Inspection is done and you have read the report. What is "Minor" for Agency likely to be a "Big deal". Geometra has to be honest, he is risking to loose his licence.(this is how we found that we are in the trouble)
Fourth - Make sure that contract says that "all the discrepancies has to be address and paid for by the Seller MONTH BEFORE THE DEED DAY and subject for final satisfactory inspection by the Geometra and the Buyer". If it says "before the deed day" - you never can make sure if any of the things are done, and done right.
Last thing - never sign the Proposta di Acquisto (Intent to Purchase), Preliminary of Final Contract which contains that you will repossess property "with all legal and Illegal parts or amenities". Also not containing the phrase: "by body, not by measure". Every contract you sign has to have the detailed description and measurements of the plot, structures and the legal living spaces in the Proposta, the Preliminary and Final.
This is what I mean could happen:
   We were shown a cute "terraced" house - from the street it had one floor, but inside there was a second floor downstairs, as house is built into the slope of the hill. Two floors were presented to us as equally habitable living spaces, lowest being roomy, (twice the size of the small above-ground level. Second level had two tiny bedrooms and one shower room). Lower level had a bit low ceilings, but had a kitchen, enough space for a sofa and small dining set and it had a French Doors walk out to the small green terrace (Yea!! - open kitchen-living space and the herb garden!!!). Later we found out that lower floor qualifies only as a Basement/Cantina and can't be legally used as a living space or carry the main kitchen. It only can be used as a regular basement: laundry, man-cave with a mini-bar, workout or storage space. It is usually should carry a very different price tag - about 30% of the price of the living areas.
I wish I knew all those things. I bought 4 houses in different countries over last 25 years.
Still this one had a lot of "traps".
Good LUCK!