Extension/Loft Conversion Calculator

Extension Cost Calculator

Extension Cost Calculator

Easily estimate the cost of your extension

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Party walls

Do you share a party wall with your neighbours?

Is your property detached?

Do you share a wall with your neighbour?

Do you share walls with two neighbours?

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Property Type

Which best describes your existing property?

Is your property a single storey dwelling?

Is your property a two storey dwelling?

Is your property a three storey dwelling?

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Single Storey Extension

Extension Dimensions - Ground Floor

Dimension across the width of your extension

- +
1

Dimension along the length/depth of your extension

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Roof Type

Which best describes your extension roof?

Pitched roof with tiles or slate

Flat roof with a low pitch and weather-proof covering

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New Rooms

Number and type of new rooms created

- +
1

New bedrooms

- +
1

New bathrooms/ensuites/WC's

- +
1

Lounge, dinning room or study

Kitchen

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Windows/ Glazing

- +
1

New windows including replacement windows to the existing property

New bi-fold or sliding patio doors

New roof lantern

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Other Additions To Existing Property

New boiler installation

Re-wiring existing property

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Double Storey Extension

Extension Dimensions - Ground Floor

Dimension across the width of your extension

- +
1

Dimension along the length/depth of your extension

You need to select an item to continue

NEXT STEP

Roof Type

Which best describes your extension roof?

Pitched roof with tiles or slate

Flat roof with a low pitch and weather-proof covering

You need to select an item to continue

NEXT STEP

Single Storey Extension Area Only

Please enter dimensions of the single storey extension area only

Dimension across the width of your extension

- +
1

Dimension along the length/depth of your extension

You need to select an item to continue

NEXT STEP

Single Storey Roof Type

Which best describes the roof design to the single storey part of your extenstion

Pitched roof with tiles or slate

Flat roof with a low pitch and weather-proof covering

You need to select an item to continue

NEXT STEP

Double Storey Extension Area Only

Please enter the dimensions of the double storey area of the extension

Dimension across the width of your extension

Dimension along the length/depth of your extension

- +
1
You need to select an item to continue

NEXT STEP

Double Storey Roof Type

Which best describes your extension roof?

Pitched roof with tiles or slate

Flat roof with a low pitch and weather-proof covering

You need to select an item to continue

NEXT STEP

Additional Floor

Dimensions of new floor/storey

Dimension across the width of your extension

- +
1

Dimension along the length/depth of your extension

You need to select an item to continue

NEXT STEP

Roof Type

Which best describes your extension roof?

Pitched roof with tiles or slate

Flat roof with a low pitch and weather-proof covering

You need to select an item to continue

NEXT STEP

Type of Extension

Is your extension single storey or double storey?

Single storey extension

Double storey extension

Part single and part double storey extension

Addition of new floor/storey for existing dwelling

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Budget Cost Estimate

Summary

Description Information Quantity Price
Discount :
Total :
You are about to receive a cost estimate for your building work. Please be aware that this estimate is for budgeting purposes only and will be subject to survey and review of design documentation.

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