At the Toxic Townhouse, Mike and the team are installing a new furnace to replace the old gas fireplace; Michael finishes Jake's new custom Command Centre; It's time to welcome Patricia and Rod back home as The City Barn is finally revealed

The police arrive after Michael makes a startling discovery while digging the footings in The City Barn; Over at The Toxic Townhouse, Mike shows the homeowners the structural issues by the stairs and the dangerous gas line installation.

Mike and the team start work on a third house that has been heated by a small gas fireplace for over 10 years; The home is crowned The Toxic Townhouse after a home inspection uncovers terrible toxic elements in the air.

The Flood House is on its way to completion; the showpiece gas fireplace with custom mantle brings Barb to tears; More structural issues are found at The City Barn, causing Mike and the team to worry.

Structural issues at both houses mean the Holmes' have to divide and conquer; Michael tackles the roof and the structural issues at The City Barn; Mike finds issues when taking down a load-bearing wall at The Flood House.

In The City Barn, the plan is to fix the roof and make the house accessible for thirteen-year-old Jake; When the reno gets delayed, the Holmes' begin a second job and find out how a little leak turned into a huge disaster for the homeowners.