Hello my name is ***** ***** I will help you.
Did you instruct the architect to do this for you, or did they just design the build?
I can't type that fast!
Please. This is quite important. You need to check.
If you had instructed the architect to do the whole package, ie planning etc inclusive then he would be liable.
However had you JUST instructed for the plans and that was it, then the onus would be on you to make sure you had planning permission.
Therefore you need to check the contract, the instructions and what has or has not been done.
It will all be in the contract and what you asked the architect to do
Can I clarify anything for you about this today please?
Ok - if he told you and you relied on it then he could be liable.
Therefore as such you could sue for loss and damage, which includes any additional costs.
The architect would be in breach of the consumer rights act 2015 by failing to act with all reasonable skill and care.