Local Property Tax review
The Revenue Commissioners have announced that they are going to target householders who have undervalued their properties for Local Property Tax. When you valued your house in 2013, did you estimate the value based on what similar properties were being advertised/sold for, or did you simply take the valuation which Revenue sent to your address? If you just took Revenue's estimated value, it is likely to be incorrect - Revenue just estimated it as an average for a town but took no regard to where your property was situated. So if they valued it at €200k but you know that its real value was say €400k in 2013, then you will need to self correct the return you submitted.
Otherwise if you put in your valuation in good faith, bearing in mind that the property market at the beginning of 2013 was still stagnant (it didn't start picking up until around May 2013), then provided you can supply evidence of the valuation at the time you should be fine. It would be a good idea to print out from the property price register sales values of similar properties; ideally you would have a sales brochure or advertisement from the time but this can be difficult to get hold of. Where your house is one-off and likely to have a significant value, it would be well worth getting a valuation from an estate agent. You will have to prove to yours and the purchaser's solicitor that the valuation was "reasonable" as part of the conveyancing process, should you sell your property in the future.