Self Build Cost Calculator – House

For general build cost advice check out our beginner’s guide to self-build costs, or get a detailed estimate for your project by using our in-depth Build Cost Calculator:

Total internal floor space of conventional storeys (in square metres) *

House Size Help

Self-building gives you the power to specify your own internal floorplan, but as a guide here are some typical house sizes:

• Two-bed bungalow 90m2
• Three-bed house 160m2
• Four-bed house 200m
• Five-bed house 250m2

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The structural system is the construction method that will form the core shell of your home. For more advice see our beginner’s guide to building systems

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Dormers are special windows that jut out from the main roof, creating more headroom inside a loft. Find out more about dormer windows

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Please enter the total number of bathrooms you will need. A single downstairs WC has already been included in the calculations.

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How much do you intend to spend in total on sanitaryware for all your bathrooms? *

Fitting-out a bathroom on a basic spec would cost around £3,000

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How much do you intend to spend on your kitchen? *

A basic fitted kitchen could cost as little as £5,000-£10,000 including installation, while a high-end bespoke kitchen could cost anything from £25,000 upwards

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How much do you intend to spend on hard and soft landscaping? *

This could include driveways, paths, garden walls and planting. We suggest a standard allowance of £8,000, but this could rise significantly for sloping sites or high-spec landscaping.

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How complex will the architecture and engineering be on your project? *

Straightforward = standard square or rectangular box
Slightly unusual = might feature several different roof slopes and a more complex floorplan
Highly complex = likely to feature glass walls, curves, cantilevers and other bespoke elements

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