Introducing Resi Express

A faster, more cost-efficient way to extend

A fixed-price design package that brings together your builder, materials and build approach from day one, so your design is shaped by real costs, not rough estimates.

~20% lower build costs

5x faster on site

Less disruption for your home

Designed around a factory-built construction system, assembled at your home.

Get your design quote

Speak to an expert for free

UK's #1

Architect on Trustpilot

11,000+

Projects delivered nationwide

92%

Planning approval rate

The process

Idea to build-ready, in one
streamlined process

Resi Express brings together design, planning, building regulations and early builder input into a single, coordinated process.

1. Design

Build-ready design with costs shaped early, aligning planning, regulations and builder input.

2. Manufacture

Precision-built off-site in the UK, ready for fast assembly at your home.

3. Build

Watertight in just a few days, assembled on-site by a Resi-vetted specialist builder.

Why it works

Built around hup!

hup! by Ultraframe is a factory-built construction system, with the structural walls and roof made in the UK and assembled at your home.

It delivers the look and feel of a traditional extension, with more of the build defined before work begins.

What that means for you

Less time living in a building site

Lower build costs

10–15% more usable internal space

More energy efficient, with lower carbon impact

Get your design quote

What's included?

Everything you need to go from idea to build-ready, without the usual uncertainty

Build-ready design tailored to your home

Planning and building regulations handled for you

Resi-vetted builder and costs aligned before you start

Factory-built system for faster, more predictable build

What homeowners say

A simpler, more straightforward way to extend

"The whole process felt much more straightforward than we expected. Everything was clear from the start, and the build itself was far less disruptive than we imagined."

— Sarah & James, London

"Having everything aligned early made a huge difference. We knew what we were getting into, and the build itself was quick and smooth."

— Mark, Surrey

"It felt like a much more organised way to do an extension. Less back and forth, and everything came together exactly as planned."

— Priya, Manchester