[Your letterhead, if desired; if not, your return address]

[Date of letter—month, day, and year]

[Recipient's first and last names]
[Company name]
[Street or P.O. box address]
[City, State ZIP code]

Dear [recipient's name]:

I am writing to let you know that the noise from your house and yard has been disturbing our peace and ability to enjoy quiet at our house. On numerous recent occasions, the loud music and parties taking place in your yard have kept us awake until extremely late. Specifically, the loud noise continued until 3 a.m. on May 23rd and 2:30 a.m. on May 27th.

Please discontinue the disruptive noise immediately. Otherwise, we will be forced to seek other ways to resolve this matter. Thank you for your prompt attention to this request and for your cooperation.

Sincerely,

[Signature]

[Sender's first and last names]