An Annexe for 2025

Why a Garden Annexe Makes More Sense Than a Home Extension in 2025

Increase your space

When space runs out inside the home, most people assume the next logical step is an extension. But in 2025, more and more homeowners are rethinking that approach and turning to garden annexes instead.

Whether you’re trying to create space for an elderly parent, give your adult children some independence, or simply need a self-contained living solution, a garden annexe offers everything an extension does, with none of the headache.

Garden Room Annex

Less Disruption, More Results

A home extension means months of dust, noise and builders walking through your house daily. With a garden annexe, everything happens outside with minimal mess, no disruption to your everyday routine. Our steel frame annexes are installed with absolute precision and minimal impact on your home life.

Designed for Living

Don’t think sheds. An annexe is fully insulated, built to modern housing standards and finished with high-end materials throughout. Smart hearing, fully fitted kitchens, bathrooms, storage, bespoke joinery, every part is tailored to individual needs. These are genuine spaces, just outside the main house.

Contact us for more information

A Faster Route to Space

On average, an extension takes 6 to 12 months to complete (longer if you hit planning delays or budget overruns). A Garden annexe are typically designed, manufactured and installed in a fraction of that time. Once foundations are in, our steel builds go up fast and because it’s all handled in-house, there’s no chasing trades.

Fixed Costs, No Spiralling Budget

Extensions are notorious for creeping costs. Once you open up a wall, you often uncover new problems that weren’t budgeted for. A garden annexe is a controlled build: designed off-site, constructed with accuracy, and delivered exactly as quoted.

Garden Room Twickenham

Built for Accessibility

If the annexe is being used for an elderly relative or someone with mobility needs, accessibility isn’t just a nice-to-have but an essential. We design with that in mind. That means flush thresholds for easy access, wider doorways, level flooring throughout, and the option for ramped entrances if needed. Everything is thought through from the start, so there’s no need for retrofitting later. It’s a smarter way to future-proof the space and make sure it’s comfortable and safe for whoever’s living there.

Our Expert Advice

At InFrame Garden Rooms, we specialise in high-specification steel frame annexes designed to last. Every project is tailored to your space, your needs and the people who will be using it. From structural engineering to final finishes, we handle it all with the kind of craftsmanship and detail our clients expect.

If you’re considering an extension but want to explore a better way to add space, we’re here to help. An annex might just make more sense.


Explore our Garden Room Range

Get in Contact

Send us your details and one of our friendly team will be in contact

A range of Pre-designed rooms & Bespoke Solutions

  • Our tried and tested InFrame range comes in a range of shapes and sizes
  • Wide portfolio of Offices, Gyms, Cinemas, Games Rooms and Bars
  • A large portion of our work is fully bespoke projects – anything is possible