Hello, thanks for requesting me - unfortunately this is a question which is not within my area of law as you are in Scotland. I will open to it to all other experts and someone will hopefully pick it up soon. Please do not reply to this as it will just lock the question back to me. Many thanks
Thank you for your question. Under Scots law an agent is only responsible for the work done by a principal if the agent doesn't disclose who the principal is. Assuming you know the identity of the party who carried out the work, your case is against that party and not the agent. The only exception to the that is where the agent was not an agent but was the party's employer. So I think from your narrative you will have to claim against the builder. Alternatively if you weren't told who he was and didn't know who he was and the quote wasn't in writing from him, you would have a claim against the agent. I hope that helps. Please leave a positive rating so that I am credited for my time.
You're welcome. Don't forget to leave a positive rating on the system so that I am credited for my time.