Given the difficulty in presenting such cases, from the initial Referral through to the later Observation and possible Appeal, I usually advise people to employ a good architect with experience of making Observations to write their submission, or to employ a competent planning consultant - right from the start.
Thes costs for such Referrals and subsequent Observations and Appeals can vary, but can run from an initial €2,000 or so for a Referral and an Observation to €4,000 if an formal Appeal is lodged - all figures excluding VAT @ 21.5%.
(If you find a competent professional willing to do it for much less, post his/her contacts here - I'll use him/her myself!)
A good submission should contain taped survey information, an ordnance survey plan showing the location of the walling and state the case in terms of planning grounds, not your personal views.
Unless the latter co-incide with the former, you may have little joy.
Even with a good laypersons Referral and subsequent Observation submission [assuming the owner lodges for retention], the planners may grant re.
That's usuall when most people call in the professionals, but calling them in earlier may avoid the later Appeal on your part. Of course, the owner if refused may Appeal and then you'll need the professionals to make your case to the Bórd too, but that's another story.
Here is some relevant information you might wish to consider.
FROM
Statutory Instruments.
S.I. No. 600 of 2001
PLANNING AND DEVELOPMENT REGULATIONS, 2001
SCHEDULE 2
Article 6
PART 1
Exempted Development — General
Column 1
Description of Development
CLASS 5
The construction, erection or alteration, within or bounding the curtilage of a house, of a gate, gateway, railing or wooden fence or a wall of brick, stone, blocks with decorative finish, other concrete blocks or mass concrete.
Column 2
Conditions and Limitations
1. The height of any such structure shall not exceed 2 metres or, in the case of a wall or fence within or bounding any garden or other space in front of a house, 1.2 metres.
2. Every wall other than a dry or natural stone wall bounding any garden or other space shall be capped and the face of any wall of concrete or concrete block (other than blocks with decorative finish) which will be visible from any road, path or public area, including public open space, shall be rendered or plastered.
3. No such structure shall be a metal palisade or other security fence.
So, in general, walling in front of a house should be 1200mm or 1.2M high maximum according to these exempted development regulations.
Some caveats:
Some buildings may be listed and cannot avail of the exempted development regulations.
Some buildings may be precluded from having such high walling by Condition of their Planning Permission.
Some regulations have issued since 2001 and you should talk to your local planning officer to confirm that these still apply.
Assuming they do still apply then you have the option of writing to the local authority planning enforcement section telling them the relevant information.
It would help greatly if you measure the height of the wall above the ground in millimetres or metres and show it on a little sketch plan and elevation and include this in your submission.
You should describe the location of the walling and if its in front of their building line you should note that this appears to be the case.
I also respectfull suggest you couch any referral letter in terms like "it would appear that..." and "based on my understanding of the exempted development regulations it seems that..." and on and so forth.
In other words, step back from stating things as fact or demanding the local authority take action.
Instead merely ask them to investigate whether the wall in question complies with the exempted development regulations and request that they take appropriate action.
This keeps you away from the precipice of libel, should such be asserted by any offended parties, and shows proper respect for the role of the local authority in determining the matter and its remedy.
Now, none of this is likely to result in the immediate removal of the wall.
If the local authority decide to send out an Inspector, he will make his report. If the matter requires recitifcation, a Warning Letter may be sent to the owner.
The owner then has the right to seek planning permission to retain the walling.
If you wish to see it removed, you will then need to press your case, and lodge an Observation during the five week period beginning on the date of the application objecting to the walling and stating your reasons in terms of relevant planning grounds for doing this and enclosing your prescribed fee, which as of 13/05/2009 is still €20.
In other words, you cannot merely say "I don't like it" or "Its blocking my view" - you must present your case in development plan terms.
Hope this helps.