The cost of installing wainscoting varies based on factors like the type of wainscoting, the size of the room, and whether you hire a professional. For DIY projects, material costs typically range from $5 to $25 per square foot, depending on the material and style. If you opt to hire a Toronto trim carpentry contractor, labor costs usually add $500 to $2,000 or more, depending on the complexity of the design and the size of the project. While professional installation costs more, it ensures precision and high-quality results.