Hello and thanks for using Just Answer.
My name is ***** ***** am happy to assist you with your enquiry.
Please be rest assured, that your neighbour is in dreamland!
The only way a party can put a charge or Restriction on someone else's property is if they have previously issued Court proceedings against the other party for damages and been successful, and then re-applied to Court because that party has not paid the damages that the Court have awarded (ie in your case this would entail him having to take you to Court , be successful, then reapply to Court due to you then not paying what the Court ordered you to pay).
I'm not sure where he got the word "writ" from- this is a claim made in the High Court where a party has a claim normally over £50,000!
I therefore feel your neighbour is being rather vindictive to say the least and is trying to bully you into agreeing to pay him whatever he is claiming.
I hope this assists and puts your mind at rest.