
Expert articles on extensions, conversions, planning permission, and property maintenance — written by TCM's team with 15+ years on London sites.

Most house extension projects that go over budget or over time share the same root causes. After 15 years building extensions across London and Hertfordshire, we have seen the same errors repeat themselves. Here is what to watch for before you break ground.

A dormer loft conversion typically takes 8–12 weeks from start to finish. But that figure hides a lot of variation. The type of conversion, the structural condition of your roof, and whether you need planning permission all affect the programme significantly.

Landlords in London face a specific set of legal obligations around property maintenance. The Homes (Fitness for Human Habitation) Act 2018 and the Landlord and Tenant Act 1985 set out clear duties. Failing to meet them exposes you to rent repayment orders, fines, and civil claims.
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