Granny Annexes

A granny annexe is a self-contained home in your garden — kitchen, bathroom, living space and bedroom — so a relative can live close by while keeping their independence. iHus annexes are purpose-built for comfortable, long-term living across one- and two-bedroom layouts in three sizes, finished to the standard of any new home. Browse the range below or visit one at an OpenHus.

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Visit an annexe near you OpenHus

OpenHus allows you to visit one of our customer’s homes so you can experience a lived-in annexe. You can speak with the owners, see the build quality, and have your questions answered over a cup of tea – our customers are a friendly bunch!

There are over 120 families within our OpenHus community, so you’re never too far from one. We have annexes spread across England and Wales, so you can pick a location that suits you best.

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MW annexe 3

Costs, finance and your planning guarantee

iHus granny annexes start from £100,538, with the final price depending on the size, layout and finish you choose. Every build is backed by our money-back planning guarantee — if planning isn’t approved, you get your money back. For a full breakdown of what’s included and ongoing running costs, see our granny annexe cost guide. For ways to fund your annexe, see funding your annexe, and for when a dependent relative may qualify for a discount, read our council tax guide.

Our granny annexes start from £100,538. The final price depends on the size, layout and finish you choose. See the full cost breakdown →

Typically 8–12 weeks from order to handover, depending on the size of your annexe. Your consultant will confirm a timeline for your build.

Many annexes fall under permitted development, and we handle the planning process for you. We’re so confident, we offer a money-back guarantee: if planning isn’t approved, you get your money back. How we handle planning →

Yes. You can view a fully furnished annexe in person. Find an OpenHus near you →

Yes. Step-free thresholds, wet rooms and wider doorways are available across the range, and every annexe is built to Building Regulations standards (3632 range excluding).

A granny annexe is a fully self-contained home for year-round living; a garden room usually isn’t. The difference, explained →

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