Thank you all for your contributions. I decided not to contact D. Coakley as a previous poster inferred they were expensive. I'll share my experience:
Initially, before posting on this site, I surfed around and then came across Richard Stapleton who was recommended on a thread on a different
website. I found his quote extremely expensive and would caution anyone who is thinking of using him to benchmark against other quotes first before proceeding with him (I have to reason to doubt the quality of his work, however).
I decided to use Tradesmen.ie in the end. I found the website service excellent. It automatically organises 4 contacts for you and from those contacts you can seek quotes. I sought quotes from three. In the end, I went with Daniel Ballenger (0858330321/014424294/
dantheman@mail.ie). He was competitive on cost compared to the other quotes, but one of the main reasons I picked him was that he was reliable and professional. For example he volunteered to show me his insurance certificates when the subject of insurance came up, he set his arrival time by his SatNav and he always answered his phone.