[DATE, ex. Wednesday, Jan 1, 2016]
[NAME, COMPANY AND ADDRESS]
Dear [NAME],
I am writing to inform you of [NATURE OF DAMAGE, ex. damage to the exterior piping on our unit, #243, which results in water leakage into the basement]. I humbly request that arrangements be made for repair. Please call me at XXXXX-XXXXX if I can be of any assistance.
Sincerely,
[YOUR NAME]