Plumbing Budget Calculator

Estimate your total plumbing spend for a UK kitchen extension: first fix, second fix, boiler work, underfloor heating, and add-ons. Calibrated against a real £10,400 plumbing contract that grew to £15,000+.

Premium calculator — unlock with an Access Pass

This calculator is part of the Kitchen Extension Access Pass. Get full access to every calculator, guide, and tool — from planning through to completion.

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One-time payment. 12 months access.