R.I. Gen. Laws § 44-5-82 — Cumberland homestead exemption

(a) The town council of the town of Cumberland is authorized to annually fix the amount,
if any, of a homestead exemption with respect to assessed value from local taxation
on taxable real property used for residential purposes or mixed purposes, defined
as a combination of residential and commercial uses, in the town of Cumberland and
to grant homestead exemptions to the owner or owners of residential real estate or
combination residential and commercial real estate in an amount not to exceed thirty
percent (30%) of the assessed value. The exemption shall apply to property used exclusively
for residential purposes, and improved with a dwelling containing less than five (5)
units or real property used for a combination of residential and commercial uses.
When real property is used for mixed purposes, the percentage of the assessed value
shall be a prorated amount. The prorated amount shall be the percentage of square
feet of the parcel used for residential purposes multiplied by the percentage of the
homestead exemption. In order to determine compliance with the homestead exemption
as outlined in this subsection, the town council shall provide, by resolution or ordinance,
rules and regulations governing eligibility for the exemption established by this
section.
(b) The town council of the town of Cumberland may provide for a proration of the homestead
exemption in cases where title to property passes from those not entitled to claim
an exemption to those who are entitled to claim an exemption.