Thinking of extending?

We offer free honest advice to help you get started with your home improvements.

The Online Architectural Platform

We work online, but we're not robots

From extensions to refurbishments, we're making it easy to remodel your home. Our experienced team use technology to provide bespoke 2D floor plans, 3D renders and elevations.

Apply for planning permission, sell your house or simply bring your vision to life. No hidden costs, no extra fees. Just high-quality drawings.


What Resi does...

Everything you need to build your happy space

Home design

Home design

Our skilled designers work with you to produce architectural drawings of your future home.
Planning applications

Planning applications

We’ll package up your designs and act as your planning agent to get approval from your local authority.
Building regulations

Building regulations

Before you get constructing, we’ll produce technical drawings so your home is safe and legal going forward.
Supplier connect

Supplier connect

We introduce you to the best professionals in your area, meaning you’re in safe hands for the rest of your project.

Book a Free Architectural Advice Call

We offer free 30 minute consultations to help you with your project.
Select a date to view availability

Tools & Calculators



Use our free valuation calculator to estimate the value an extension could add to your property.

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Simply enter your project details, tell us what you need and we offer a free consultation to help get you started

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Get a free construction cost estimate to get an idea of how much your project could cost to complete.

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Frequently Asked Questions

Why would I use Resi?

What does Resi offer?

Why don't I just use a local architect?

Can I trust you? Are you qualified?

What information do I need to provide for you to start work on my extension?

Can Resi produce a variety of options for my extension?

Phone: +44203 868 9453 | Email:

Resi Design Ltd. trading as 'Resi' | Company No: 10471125

We are proud to employ architects registered with the Architects Registration Board and were awarded the mark for The Mayor's Good Work Standard for fair pay & conditions, wellbeing, skills, progression, diversity and recruitment.

Resi Finance Ltd is an appointed representative of Mortgage Advice Bureau Limited and Mortgage Advice Bureau (Derby) Limited who are authorised and regulated by the Financial Conduct Authority. Resi Finance Ltd. Registered Office: Kemp House, 160 City Road, London, United Kingdom, EC1V 2NX. Registered in England Number: 12327535