Central London has the highest property prices in the country, so it’s no surprise that people are looking to improve their existing homes rather than moving, especially when a move can change school catchment areas and work commutes. The average central London property is now worth over £1,300,000 – that would incur costs of over £73,000 in stamp duty alone, which is usually more than the cost of a spacious house extension before you even add moving fees and solicitor fees.

Planning Permission in Central London

London is one of the most architecturally varied cities in the world, with Victorian, Georgian, and Edwardian homes seated right next to brutalist architecture and modern builds. As such, it can be difficult to gauge whether or not a house extension will require planning consent to build. As a general rule of thumb, if you are planning on a multi-storey conversion, or a particularly modern conversion (perhaps made from glass and aluminium) on a period house, it is very likely to require planning permission.

Our architectural partners have experience across all of London’s boroughs, and will guide you through the process to design the perfect house extension for you while working within your borough’s requirements.

London House Extension Prices

In central London, you can expect to pay approximately £1,200-£1,500 per m2 (excluding VAT). If you would like to add popular features such as underfloor heating, bi-fold doors, extensive glazing, or a kitchen, this is likely to increase the costs further. For a tailored quote and fair, transparent pricing, get in touch – we are happy to arrange a no-obligation assessment to look at your property and discuss your options before any work is booked in. You can then make an informed decision once you have all of the budgets and information at your disposal.