Research

Calculate your

Extension Potential

Identify property-specific risks

View nearby planning apps

Estimate build cost

Check your home for free

Research

Extension Library

Articles & Guides

Planning Applications

Design Playground

Plan

Design Cost Calculator

Build Cost Calculator

Value-add Calculator

Permitted Dev. Checker

Extension Potential Checker

Execute

Get a Design Quote

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.

Speak to an expert

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

How long will your renovation take?

Get a realistic timeframe estimate for your home renovation project.

If you are a human, ignore this field

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?

Ground floor

What kind of ground floor extension are you doing?

Rear

Side infill

Side

Wraparound

Side and rear

Confirm

Loft

What kind of loft extension are you doing?

Main dormer

Outrigger dormer

Hip to gable with main dormer

Hip to gable with no dormer

L shaped dormer

Confirm

First floor

What kind of first floor extension are you doing?

Side and rear

Rear

Rear over outrigger

Rear over ground floor

Side

Confirm

Other

What kind of extension are you doing?

Garage - Conversion

Garden - Annex

Two Storey - Rear

Two Storey - Side

Confirm

How many bedrooms are there?

1

2

3

4

5+

When do you want to be finished by?

Loading...