Research

Calculate your

Extension Potential

Identify property-specific risks

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Estimate build cost

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Permitted Dev. Checker

Extension Potential Checker

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About

We’re the UK’s #1 extension architects

Sort your home extension in one place, with best-in-class architectural drawings, planning support and intros to vetted builders.

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About Resi

What we do?

House extensions

Loft conversions

Kitchen extensions

Garage conversions

Single storey extensions

Double storey extensions

Rear extensions

Side extensions

Side return extensions

Wraparound extensions

Permitted development checker

Permitted development (PD) rights are a set of permissions that allow certain types of extension without needing to apply for planning permission.

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What property are you extending?

Detached

Semi detached

Terrace

Other

What type of property are you extending?

Flat

Bungalow

Confirm

What do you want to extend?

Select as many as you like

Ground

What kind of ground extension are you doing?

Rear

Side

Confirm

Loft

Two storey

Additional stories

What kind of additional stories extension are you doing?

One additional storey

Multiple additional stories

Confirm

Other

What kind of extension are you doing?

Wraparound

Garage

Confirm

Is it in a conservation area?

Yes

No

Is it a listed building?

Yes

No

When was the property built?

Before 1948

After 1948

How many stories does the property have?

1

2

3+

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