John Stevens owned a dilapidated apartment that he rented to James and Cora Chesney for a low rent. The Chesneys began to remodel and rehabilitate the unit. Over a four-year period, they installed two new bathrooms, carpeted the floors, installed new septic and heating systems, and rewired, replumbed, and painted the apartment. Stevens periodically stopped by and saw the work in progress. The Chesneys transformed the unit into a respectable apartment. Three years after their work was done, Stevens served the Chesneys with an eviction notice. The Chesneys counterclaimed, seeking the value of the work they had done. Are they entitled to it?