It doesn't quite work this way. He cannot just get a CCJ against you today. To do so he first needs to submit a formal claim in the small claims court. The claim needs to be processed and you will be given the chance to repsond to it and defend it. A hearing will then be scheduled so that this can be heard by a judge and you can both attend to give your side if the story. After that he judge will make a decision and only if he believes the builder is in the right will they issue a CCJ in his favour. So a CCJ is still a few months away.
In terms of challenging this bill, when you have entered into a contract for work and materials, where the main focus is labour and skill, the Consumer Rights Act 2015 says that the work must be:
· Carried out with reasonable care and skill (to the same standard as any reasonably competent person in that trade or profession);
· Finished within a reasonable time (unless a specific time has been agreed); and
· Provided at a reasonable price (unless a specific price has been agreed).
In addition, any information said or written is binding where the consumer relies on it. This will include quotations and any promises about timescales or about the results to be achieved.
If there are problems with the standard of work, or any of the above, you will have certain rights:
1. The trader should either redo the parts of the service which are inadequate or perform the whole service again at no extra cost to you. This must be done within a reasonable time and without causing you significant inconvenience.
2. If redoing the work is impossible or cannot be done within a reasonable time or without causing significant inconvenience, you can claim a price reduction. The price reduction would depend on how severe the issues are and could be as much as the full cost of the work.
3. If the service has been performed so badly that it would be unreasonable to expect the consumer to give the trader a second chance, you may be entitled to claim the cost of remedial work by another trader.