Thinking about adding a double-storey extension to your home? If you’re able to, doubling up with an extra level when extending will be one of the best routes to elevating your property’s value and adding more useful floorspace that can be used for bedrooms, bathrooms, offices and more. When planning a double-storey extension, there are
The post Double-Storey Extension Ideas – 13 Two-Storey House Extensions that Stand Out from the Crowd appeared first on Build It.
Thinking about adding a double-storey extension to your home? If you’re able to, doubling up with an extra level when extending will be one of the best routes to elevating your property’s value and adding more useful floorspace that can be used for bedrooms, bathrooms, offices and more.
When planning a double-storey extension, there are a few key factors to consider. You’ll need to create a design that avoids blocking all-important daylight from your current home’s floorplan, whether your local planning authority will actually approve a double-height addition, and how you’ll want to use the extra space – for many, a two-storey extension will mean rejigging their property’s layout.
From sleek, contemporary builds that make a striking statement against the home’s original design through to the more modest, understated schemes, here I’ve rounded up a collection of inspiring double-storey extensions, alongside some top tips from the experts.
Jump to two-storey extension FAQs answered
1. 18th-century cottage upgraded with a double-height extension
This double-storey extension, designed by Loader Monteith architects, has completely transformed a once-neglected, 18th-century cottage in a historic village in Perthshire.
Photo: Jim Stephenson
Situated on a riverside plot, connection to the scenic surroundings and garden was central to the project brief. A new two-storey extension at the rear of the cottage now accommodates an open-plan living and dining space, which opens out onto the garden through large, fully-glazed sliding patio doors. The new extension also houses a primary bedroom suite, with a large picture window overlooking the valley.


The double-storey extension is protected by a perforated aluminium canopy, which casts dappled light and provides privacy from the tall church nearby. The canopy is 1.5m deep on one side and around 80cm on the other, regulating the amount of sunlight entering the home throughout the day.
2. Double-storey rear extension to a period cottage
Located in a small Cambridgeshire village, this property was formerly four small agricultural cottages that have been altered, adapted and combined over time to create one larger building. Snell David Architects sought to reimagine the home and make it fit for modern family life.
Photo: George Sharman
They demolished the existing rundown flat roof extension and replaced it with a new double-height addition that features sharp, full-height glazing.
Photo: George Sharman
Inside, a mezzanine gallery overlooks the open-plan kitchen-diner and provides perfectly-framed views through to the garden while rooflights overhead flood the space with natural light.
The post Double-Storey Extension Ideas – 13 Two-Storey House Extensions that Stand Out from the Crowd appeared first on Build It.