Customer Services have asked me to look at this for you.
It’s actually a very common question because developers are very good at taking money off you when you want to buy a property but not so good at fixing it once you have moved in.
I don’t know how far you have got and what it would cost to fix the problems but you need to put everything in writing.
You need to give them a reasonable time to come up with a proposal and a reasonable time thereafter to fix the problems.
What you don’t want to do is wait until the end of July because that’s almost 2 months away.
So my suggestion would be to put in writing to them exactly what the list of faults are and that you want a firm proposal from them no later than 4 PM on Friday, 18 June 2021 to complete the work by no later than 31 July failing which you will issue court proceedings against them without further notice.
That way, if they don’t come up with a proposal in within the next fortnight, you are not waiting another six weeks but it does give them some time to get the work done.
Meanwhile, you need to get quotations (not estimates) for sorting all the work out so you know exactly how much you are going to take them to court for.
The new Moneyclaim beta system is easy to use: https://www.gov.uk/make-money-claim
the new system is much better than the old government Gateway system.
You can prepare the proceedings now, at your leisure, save them, and then just pay the fee and press the button when the deadline in your letter before action, expires.
It's then just a case of following the court process and responding to any emails that you receive.
Thank you for letting me assist you with your legal question. I am glad that I was able to help.
I am not certain whether that answers the question for you or not, but I am happy to answer any specific points arising from this.
It will be my pleasure to help you again either further with this or any future questions you have