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We’re #1 in the Architects category on Trustpilot

Be cost efficient on designs + planning support

Get your project sorted without the headaches

Unlock expert guidance from ex-planning officers

Organise your entire project online

With 8,000+ projects under our belt

Rear extensions Side return extensions Wraparound extensions Loft extensions

We’ve streamlined the architectural process

You’re busy and you live in Britain – the last thing you want is endless days off work having meandering in-person conversations over pencil-drawn floor plans.

We visit once, quickly, to create a true-to-life digital scan of your property. After that, everything is handled online and on the phone with a minimum of fuss, so you can extend easy.


We have a 90% planning approval rating

A significant portion of our desk space is allocated to ex-local authority officers who we’ve rescued from across the country. They know the planning permission playbooks inside and out, giving your project the greatest chance of getting the green light from the council.


And a network of vetted builders to pick from

Our Connect service helps you find the right contractors to make your designs a reality. There’s no additional cost, and we’ll sit down with you to go through your project’s tenders and find the most suitable company to fulfil your build.


Already got a design in mind?

You don’t have to go through the whole process with an architect if you know what you want right now. With our with our online configurator, you can recreate the home extension in your head in under a minute, saving time and money in the process.

Cream of the crop

We've got more 5 star reviews than anyone else, by a country mile. That's why we're rated No. 1 in the Architect category on Trustpilot.

The team at Resi have been so unbelievably help...

The team at Resi have been so unbelievably help...

Annie • NW7

Ground floor Wraparound

took all the work and kept me in touch…

took all the work and kept me in touch all the ...

Roger • NW5

Ground floor Internal alteration

I found Resi personnel very helpful

I found Resi personnel very helpful. Their meth...

Jacqueline • CM3

Ground floor Rear

Resi have been amazing from the start

Resi have been amazing from the start, the comm...

Obi • BR5

Garden Annex

It is a 10 from me! :)

It is a 10 from me! :) I found Resi through onl...

Yiming • W14

Custom Custom

Working with Resi has been such a pleasure from...

Working with Resi has been such a pleasure from...

Saqib • SL6

Ground floor Rear

Outstanding Service

Shabnam from the Resi finance team is exception...

Joie • MK10

Ground floor Rear

Our experience with Resi

Our experience with Resi was one of the best cu...

Abu • DA8

Ground floor Rear


Really good and easy to use online platform

Richard • TW11

Loft L shaped dormer

Delighted home owner

Fantastic service would highly recommend this e...

Lyn • BR6

Ground floor Rear

Really good service,

Really good service, we dealt with multiple at ...

Nick • NW10

Ground floor Side infill

Excellent, friendly service

Jack at Resi was brilliant at bringing together...

Oliver • W4

Loft L shaped dormer

Speak to an expert

We’re always up for 30 minute phone consultations to help you with your project.