Side Return vs Rear Extension
Make an informed decision about Side Return Extension vs Rear Extension for your North London home.
Side Return Extension
Extends into the narrow alley running alongside your kitchen in a Victorian or Edwardian terrace. Creates a wider, more open kitchen space.
✓ Advantages
- ✓Dramatic impact on narrow kitchens
- ✓Often permitted development
- ✓Relatively affordable
- ✓Creates open-plan kitchen/dining
- ✓Brings in more light
- ✓Doesn't reduce main garden
✗ Disadvantages
- ✗Limited extra space (1.5-2m width)
- ✗Only suitable for terrace properties
- ✗May affect neighbour relations
- ✗Can feel corridor-like if not designed well
- ✗Limited by existing side passage width
Best for: Victorian/Edwardian terraces, Properties with side alley access, Budget-conscious kitchen extensions, Those wanting quick transformation
Price range: £25,000 - £50,000
Rear Extension
Extends into your garden at the back of the property. Can be single or double storey, offering more flexible sizing.
✓ Advantages
- ✓More space gained
- ✓Greater design flexibility
- ✓Can be combined with side return
- ✓Options for multiple rooms
- ✓Better for large families
- ✓Can go double-storey
✗ Disadvantages
- ✗Reduces garden space
- ✗More expensive
- ✗Often needs planning permission
- ✗Longer build time
- ✗More foundation work
Best for: Properties with generous gardens, Those wanting significant extra space, Creating family rooms, Double-storey additions
Price range: £40,000 - £100,000 (single storey)
Side-by-Side Comparison
| Feature | Side Return Extension | Rear Extension |
|---|---|---|
| Typical Cost | £25,000 - £50,000 | £40,000 - £100,000 |
| Space Added | 5-10 sqm | 15-40 sqm |
| Garden Impact | Minimal | Significant |
| Planning Required | Usually no | Often yes |
| Build Time | 6-8 weeks | 10-16 weeks |
| Property Types | Terraces only | All types |
| Design Flexibility | Limited | Very flexible |
| Light Improvement | Excellent | Good |
Our Expert Verdict
For Victorian terraces with narrow galley kitchens, side returns offer exceptional value and transformation. Rear extensions are better when you need more space or have a generous garden to work with.
Choose Side Return Extension if:
- →You have a Victorian terrace with side alley
- →Your kitchen is narrow and dark
- →Budget is under £50,000
- →You want minimal garden impact
- →Speed of completion matters
Choose Rear Extension if:
- →You need more than 10 sqm extra space
- →You have a large garden
- →You want a family room, not just kitchen
- →Your property isn't a terrace
- →You're considering double-storey
Frequently Asked Questions
Can I do both side return AND rear extension?▼
Yes! A "wraparound" extension combines both, creating an L-shaped extension that maximises space. This is popular in Hampstead and Highgate terraces. Costs: £60,000-£120,000 typical.
Will a side return need planning permission?▼
Usually not, as they're typically under the permitted development limits. However, conservation areas (much of Hampstead!) may require planning or certificate of lawfulness. We advise on your specific situation.
How much value does a side return add?▼
A well-designed side return in a North London terrace typically adds 5-10% to property value, often more than the build cost. The transformation of the main living space is the key selling point.
Will extending affect my neighbours?▼
Party Wall Act applies to most extensions. We manage the party wall process, notifying neighbours and arranging surveys. Good communication prevents disputes. Most neighbours are supportive once they understand the plans.
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Need Expert Advice?
Our experienced team can help you decide which option is best for your home. Get personalized advice and a free, no-obligation quote.