Renovating an entire house can take anywhere from 3 to 9 months to complete. The timeline will depend on the scope and complexity of the renovation project, the size of the house, the availability of contractors and subcontractors, the ability to acquire permits on time. Install electrically powered heated coils and tubing under your flooring Install a heat lamp (recommended for bathrooms with standard-height ceilings) Install a heated towel rail (there are plug-in options available)