Hi Snape,
I think rule of thumb is 4.5 times your joint gross income. From what I've heard brokers can usually negotiate more for you - but will it still be affordable.. It also depends on how long you've been in your job, if you're still on probation, if you get overtime, bonuses, etc...
These days you can get anything up to 100% mortgages, but you have to have a certain amount of savings to cover the extra costs. You usually have to put down a booking deposit if you go sale agreed on a house, about 5K. Once you sign contracts you have to put down 10% of the purchase price (-the 5K booking deposit). You can get a loan from the bank for this amount if needed (at a higher interest rate though). Solicitor's fees and costs excl stamp duty probably run up to somewhere around 2K and stamp duty on 350K is 10,500 Euros. So you have to have a good 15-20K saved to go ahead with a 100%mortgage. For the latter, PTSB and ICS in my opinion are the best lenders. If you've got lots of money saved and can go for a better loan to value ratio loan then there are other and possibly better options available to you. I'd recommend you either go to a broker and see what they can do for you, or go to one of the banks and talk to a mortgage advisor.