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With space at a premium in London, homeowners are constantly seeking clever ways to expand their living space without relocating. Two of the most popular options for enhancing ground-floor space are the side return extension and the rear extension, but which one is right for you?
If you're planning a London single-storey extension, this guide breaks down both options, including benefits, challenges, and what they might cost you in 2025.
What Is a Side Return Extension?
A side return extension in London involves building into the narrow alleyway that typically runs alongside Victorian and Edwardian terraced homes. While this area may seem small, it can significantly transform your kitchen, dining, or living area when combined with open-plan layouts and natural light features like skylights or bi-fold doors.
Benefits of a Side Return Extension:
- Makes use of wasted outdoor space
- Perfect for narrow homes
- Enhances natural light with skylights or glass roofing
- Often requires less planning permission than larger builds
Things to Consider:
- Limited width may affect furniture placement
- Structural changes to the existing side wall
- May not be suitable for detached or wider properties
What Is a Rear Extension?
A rear extension expands your home directly out into your garden space. This style is ideal if you have the outdoor area to spare and want to create a larger footprint for kitchens, family rooms, or even an additional bedroom.
Benefits of a Rear Extension:
- Ideal for large open-plan spaces
- Allows more flexibility in design
- Can include full-width glass doors for outdoor connectivity
- Adds significant property value
Things to Consider:
- May reduce garden or patio area
- Likely to require planning approval, depending on depth
- Potentially higher cost than a side return
Cost Comparison: Side Return vs Rear Extension in London
Single story extension costs in London vary depending on the complexity of the build, materials used, and your location within the city.
|
Extension Type |
Approximate Cost (2025) |
|
Side Return |
£1,800 – £2,800 per m² |
|
Rear Extension |
£2,000 – £3,200 per m² |
|
Wraparound Combo |
£2,200 – £3,500+ per m² |
Note: Costs include basic building work, not finishes or kitchens. Always seek a detailed quote from a local professional.
Which One Should You Choose?
Choose a Side Return Extension if you:
- Live in a terraced or semi-detached house
- Don’t want to sacrifice garden space
- Prefer a lighter, more affordable build
- Want to modernise your kitchen or open-plan living
Choose a Rear Extension if you:
- Have a larger garden
- Want more square footage
- Need a multi-use room like a kitchen-diner-lounge
- Are planning a future second storey or loft upgrade
What About Combining Both?
The wraparound extension combines the best of both worlds a side return and rear extension merged to create an L-shaped design. This is ideal for those who want to dramatically open up the back of their property with a spacious, bright ground floor.
Planning & Permissions in London
- Many London single storey extensions fall under Permitted Development Rights, meaning you may not need full planning permission — but you must still comply with building regulations.
- Homes in conservation areas or listed buildings often require special approval.
- It’s wise to consult with an architect or builder who understands side return extension London planning policies.
Final Thoughts
Choosing between a side return and a rear extension depends on your space, budget, and goals. Both options can enhance your lifestyle and add value to your home when planned well.
If you're still unsure which option suits your property, it’s best to speak with experienced extension specialists who can assess your layout and guide you with clarity.
Ready to Transform Your Home?
Whether you're considering a side return extension in London or exploring the cost of a single storey rear extension, our team at MBT Group is here to help. We specialise in planning, designing, and building stunning home extensions tailored to your vision and budget. Call MBT Group Today.
Serving: Greater London & surrounding boroughs
Visit: mbtgroup.co.uk
Request your FREE extension consultation now
