Average Cost of a Home Extension in Croydon & Surrey
If you’re planning a home extension in Croydon or Surrey, understanding the costs is essential before starting your project.
In 2026, typical home extension costs in the area are:
- Single-storey extension: £1,800 – £2,500 per m²
- Double-storey extension: £2,000 – £3,000 per m²
- Wrap-around extension: £2,500+ per m²
For example, a 20m² single-storey extension could cost between £36,000 and £50,000 or more, depending on specification.
Why Costs Vary in Croydon & Surrey
Prices in South London and Surrey can vary depending on several key factors:
Size and Design Complexity
Larger extensions or bespoke designs require more materials, labour, and structural work.
Ground Conditions
Some areas may require additional groundwork or reinforced foundations, increasing overall costs.
Specification and Finishes
High-end features such as bi-fold doors, skylights, and premium kitchens will increase your total budget.
Planning and Regulations
While many extensions fall under permitted development, some projects in Croydon and Surrey may require planning permission.
What Type of Extension Should You Choose?
Rear Extensions
Ideal for expanding kitchens and creating open-plan living areas.
Side Return Extensions
Popular in terraced homes across Croydon to make use of unused side space.
Wrap-Around Extensions
A combination of rear and side extensions for a full transformation of the ground floor.
Does a Home Extension Add Value?
Home extensions are one of the most effective ways to increase property value in Croydon and Surrey.
On average:
- Extensions can add 15–25% to property value
- Open-plan living spaces are highly desirable
- Additional usable space increases buyer appeal
How Long Does a Home Extension Take?
Typical timelines include:
- Planning and design: 4–8 weeks
- Construction: 8–16 weeks
Starting in spring often allows completion in time for summer.
Hidden Costs to Consider
When budgeting, it is important to account for:
- Architectural drawings
- Structural engineer fees
- Planning applications (if required)
- Building control
- Interior finishing
These additional costs can add approximately 10–20% to your overall budget.
Choosing a Builder in Croydon & Surrey
When selecting a builder, consider the following:
- Proven experience in home extensions
- Strong knowledge of local regulations
- A portfolio of completed projects
- Clear and transparent pricing
Final Thoughts
A home extension is a valuable investment for homeowners in Croydon and Surrey, offering both increased living space and long-term property value.
Planning ahead and working with an experienced local company will help ensure your project runs smoothly and stays within budget.
){kind=link}