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Your extension budget: beyond the square-metre price
From the first drawings to the final fittings, know what belongs in the budget before you ask for a quote.
Read the budgeting guideA LITTLE CLARITY GOES A LONG WAYMake sense of
Make sense of
what things cost.
From a new patio to your monthly bills. Free calculators and practical guides to help you plan with confidence.
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Quick mortgage check
What could your monthly repayment be?
Estimated monthly repayment£1,111.66
Total interest£133,499
Illustrative rate. Excludes fees and rate changes.
Explore the full calculatorFIND YOUR STARTING POINT
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All 20 calculatorsA useful place to start
CALCULATOR
Patio installation cost
Build a patio installation budget with materials, labour, extras and VAT shown separately.
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UK salary take-home
Estimate monthly take-home pay for 2026/27, with separate Scottish Income Tax bands.
Use calculatorCALCULATOR
Electricity running cost
Find the cost of running an appliance using its power, hours of use and your own electricity tariff.
Use calculatorCALCULATOR
Fencing cost
Work out panels, posts, installation and removal costs for a straight fence run.
Use calculatorTHE DETAILS THAT MAKE A DIFFERENCE
All cost guidesPlan a little smarter
PRACTICAL GUIDE
Patio costs: compare prices, groundwork and quotations
A dated supplier benchmark, an itemised budget example and the questions that make patio quotations comparable.
Reviewed 8 Oct 2026 PRACTICAL GUIDEHow to calculate an appliance’s electricity cost
Use power, time and your own unit rate to understand the cost of one appliance.
Reviewed 8 Oct 2026 PRACTICAL GUIDEWindow and gutter cleaning costs: compare visits and scope
Dated provider prices, annual visit calculations and a checklist for comparing cleaning quotations.
Reviewed 8 Oct 2026Useful estimates. No hidden assumptions.
See how each calculation works, edit the figures and check the source of important facts.