Are you going to apply for a position of housekeeper in a hotel, or other establishment? If you do apply for such a position, you will need to send your CV/resumé along with a housekeeping cover letter.
If you are applying for different housekeeping jobs you may be tempted to write just one housekeeping cover letter and send it to different companies. However, this is not a very good idea. Each cover letter should be tailored to suit the job advertisement or job description. This should be beside you as you write the letter.
You need to show that you have done some research and understand how the company you are applying to runs its operations. As these differ from company to company you will need to ensure that your letter reflects your knowledge of what each company requires.
Beginning a housekeeping cover letter
Whatever job you are applying for, you need to tailor the cover letter to suit the company to which you are applying.
If you have headed paper, then you will make a good first impression. Your name and address should be central.