7 Single-Storey Extension Design Ideas
Often built within Permitted Development, a single storey extension can provide much needed extra space for your home

A single storey extension can add much needed space to a home, while often being achievable under Permitted Development rights, saving you the headache of having to achieve planning permission.
Whether it’s to create a larger kitchen or you dream of an open plan space for your main living areas, a single storey extension can unlock the potential of a plot and reinvigorate all manner of houses, from listed buildings to bungalows.
(MORE: Get a quote for your own extension project)
1. A Timber-clad CLT Extension
This CLT extension to a listed barn conversion is a prime example of how to marry contemporary with traditional.
- Build cost: £250,000
- Build time: Five months
- Location: Hampshire
(MORE: Building an Extension: Beginner's Guide)
2. Transformation of a Post-War Detached House
This incredible extension from the rear of a post-war detached house has allowed for the existing home to be transformed into a dramatic double-height open plan space.
- Build Cost: £295,000
- Build Time: 11 months
- Location: Hampshire
3. Light-filled Extension to a Victorian Home
After living in the house for two years, the homeowners added this beautiful single-storey extension to create a living space that was flooded with natural light.
- Build Cost: £280,000
- Build time: 13 months
- Location: Greater London
4. Contemporary Extension to a Listed Cottage
These homeowners enlisted the services of Charlie Luxton to help them create this fabulous contemporary extension scheme that has opened up the living space of a listed cottage.
- Build cost: £258,600
- Build time: 12 months
- Location: Wiltshire
5. A 1930s Bungalow Transformed
This 1930s bungalow has been remodelled and extended to open out onto the mature garden.
- Build cost: £150,000 (£714/m²)
- Build time: 8 months
- Location: Worcestershire
6. Creating an Open Plan Living Space
Built under Permitted Development, this extension provides covered inside/outside entertaining space.
- Build cost: £68,000
- Build time: 4 months
- Location: Oxfordshire
7. Light-filled Kitchen Extension
By extending their home, Penny and Douglas Dawson have replaced a small, dark kitchen with a light-filled, open place space.
- Build cost: £120,000
- Build time: 4 months
- Location: West Midlands
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