With property prices continuing to rise across the capital, many homeowners choose to extend rather than move. This has increased demand for experienced building contractors across North and East London, particularly for kitchen extensions, loft conversions, and rear house extensions.
In 2026, the cost of building a house extension in London depends on factors such as design complexity, structural requirements, materials, access constraints, and labour. Most extension projects carried out by professional house building contractors typically range between £1,800 and £3,000 per square metre.
Single-storey extensions are often used to expand kitchens or create open-plan living areas. Double-storey extensions can add bedrooms and bathrooms while improving overall property value. Many residential construction companies near me now recommend design solutions that maximise space while preserving outdoor areas and natural light.
Experienced companies building houses also ensure extension projects comply with planning regulations and building standards. In many cases extensions fall under permitted development rights, although professional advice from a qualified contractor is essential before starting construction.
Working with reliable local building contractors ensures the project is carefully planned, properly managed, and completed to high standards.
