15 two storey extension design ideas

Use our selection of real two-storey extensions to inspire your own design project

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Adding a two storey extension to your house could be the perfect solution to giving you much needed space. Adding two storeys is more cost effective than adding one, so if you are planning an single storey extension, upgrading to two might be a worthwhile consideration.

Take a look at this list of beautiful two storey extensions, from traditional oak framed farmhouse designs, to contemporary glass boxes.

 

Related articles: How to add a two storey extension | The ultimate guide to extending your home | How to add a two storey extension without planning permission

Two storey oak frame extension

The design brief: The owners of this stone-built farmhouse (below), which is located in a small town between Carmarthen and Lampeter, in west Wales, tasked oak frame design-and-build specialist Arboreta with creating more space. The extension was designed to take in views with a sunroom downstairs and bedroom above. Lots of glazing was incorporated while maintaining a look that was sympathetic to the period style of the home. A similar oak-framed extension would cost around £35,000.

Arborita extension

 

Two storey glazed extension

Glazed extension by IQ Glass

Glazed extension by IQ Glass

Treehouse style two storey extension

Treehouse style extension by Atelier-M

Treehouse style extension by Atelier-M

 

Inside-outside space

Inside-outside extension by Riach Architects

Inside-outside extension by Riach Architects

 

Statement exterior

Brickwork contrast extension by Lipton Plant Architects

Contemporary extension by AR Design Studio

Brickwork contrast

]Glass box extension by IQ Glass]

Brickwork contrast extension by Lipton Plant Architects

 

Glass box two storey design

Glass box extension by IQ Glass]

Glass box extension by IQ Glass

 

Minimalist two storey extension

 

The design brief: Architect Your Home was chosen to design this extension (below) in keeping with the street scene for this house in Surrey. The owners wanted a modern style with white rendered walls and sliding doors. Built in place of the garage, the extension creates a home office, utility room and large kitchen that opens out onto the dining room and garden. Upstairs, two new bedrooms were created.

Minimalist extension by Architect your Home

The cost: In total, this project cost around £156,000

 

Eco-friendly scheme

Eco-friendly extension by Samuel Kendall Associates

Eco-friendly extension by Samuel Kendall Associates

 

Two storey atrium extension

 

The design brief: To connect the two distinct areas of their Swansea home, the owners commissioned this extension (below) in the form of a glass atrium from Apropos. The stunning double-height design mirrors the roof pitch of the main building sections, to bridge the two wings of the house. The light-filled space is used as an entrance hall and quiet living area that allows the garden to be enjoyed all year.

Atrium extension from Apropos

The cost: A similar structure would cost around £150,000 for design, planning permission, materials, manufacturing and installation

 

Classic garden room

 

The design brief: A desire for more living space led the owners of this Bristol property to contact Vale Garden Houses, which created an extension that adds a garden room off the existing downstairs living space and an enlarged kitchen-diner above; a roof lantern ensures the room is filled with natural light. Local stone was sourced to match the main building, with traditional timber used for the frame, incorporating decorative mouldings and classical columns. Sliding sash windows ensure continuity with the existing house.

Garden room extension by Vale Garden Houses

The cost: Expect to pay £42,000 for a similar garden room extension from Vale

 

Metallic finish

Metallic finish extension by Des Ewing Residential Architects

Metallic finish extension by Des Ewing Residential Architects

 

Slimline two storey extension

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Slimline extension by Waind Gohil

 

Complete two storey makeover

Two storey extension with white render

Sculptural timber

Sculptural timber extension by Paul Archer Design

Sculptural timber-clad extension by Paul Archer Design

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