Hartford, Conn., Mun. Code ch. 18 § 18-105

A. In the event of the failure of any person to perform remedial action (including but not limited to inspections, repairs, demolition, maintenance, and removal, among other actions) to correct a violation or comply with any other order, the director of licenses and inspections or director of health may cause compliance therewith, and the expense of the compliance may be collected as a debt against such person, and the city may place a lien on the property.
B. Ten (10) days prior to the commencement of undertaking any such remedial action that may incur costs, the city shall provide to the owner notice of the city's intention to undertake such work, except in cases of emergency action pursuant to section 18-102 of this code, in which case no such notice shall be required.
C. Notice required by this section shall be satisfied if the director of licenses and inspections or the director of health leaves with such owner, or mails to such owner's usual place of abode, a copy of a statement of the city's intent to perform remedial action upon the owner of the housing subject to remedial action. If the owner does not reside in the city, but has a registered agent therein, the notice may be so left with or mailed to the registered agent. When there are two (2) or more owners, the notice shall be so served on each owner, but the city's failure to notify each and every owner shall not relieve such owners of liability under this code. If an email address has been provided, an electronic copy of a notice required by this section may be sent to the alleged violator, provided that failure to send such a copy shall not be considered a failure to serve.