gosh, I think I opened a can of worms and went away so will try to catch up. Remember I am not a lawyer, I am being guided by our lawyers (in whom I have enormous trust - Gomez, Villaries and Alverez 95 286 88 24) and applying my own perspective/sense checks.
The view of our lawyers is that failure by the developer to complete within the 3 months grace period allowed in such agreements is itself grounds for a claim for compensation. The contract confirms the apartments will be completed no later than end December 2005 (check your contracts under section 4a "Entrega Del Inmueble" in case you have another date) so we are entitled to claim compensation from the end of the third month after that, i.e. from end March 2006.
One word of caution - if I was the developer I would read this site daily, this may become a game of poker and so best not reveal your hand too early.
In this case we are covered by Spanish Law but also by Jurisprudence, so whilst this means we are entitled to receive damages ( compensation) , we must also have sufficient evidence to support that claim - and that will in part be down to individual circumstances. Who knows who bought with the intention to rent, or to live in permanently or as a pure private holiday place - each person must make their own case I think.
The developer must be aware therefore that simple loss of rental income has some validity as a claim, but the amounts will be subject to some negotiation. Dont believe the odd tabloid press coverage that the rental market is dead in this area, it is booming in the golfing market and thats what we have, top of the market, premium golf rental apartments in Andalucia!!! And they are almost 2 years late!!!!
I am sure there is some Jurisprudence that the developer will try to fall back on as a base line, and then try to go below it. Hence my thought that this will be game of poker but I think reason will prevail and excessive claims for compensation wont succeed whilst a refusal to offer any compensation is unlikely to be a sustainable position for the developer to take.
Negotiations should take place outside the courts, there is no requirement to go to court to gain compensation. Its only if we are unable to reach an agreement that court action is necessary - but that remains of course a real option for those with reasonable claims which the developer refuses to come to a deal on.
Hope this helps but remember, these are just my considered thoughts based on advice I have been given by lawyers I trust. Ultimately I think this is a case where we need to look after ourselves and be reasonable.
Tom