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THE NUMBERS

Costs

The real numbers behind the project, including the areas where we saved money and the places where the budget moved.

Initial budget

What we expected the extension to cost before work began.

Quotes & trades

How prices compared and where the biggest labour costs appeared.

Materials

What we bought ourselves and how material choices affected the total.

Final cost

The eventual total and the difference between our starting assumptions and reality.

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Our Extension Project

Our experience of planning, building and finishing our own home extension — including the costs, mistakes, DIY jobs and things we learned along the way.

© 2026 Our Extension Project.