Kitchen Extensions in Lewisham: Costs, Planning & What to Expect

Thinking about extending your kitchen in Lewisham? You're not alone. Across SE13 and the surrounding streets, homeowners are investing in kitchen extensions to create brighter, more functional living spaces. At Heath Projects Limited, we've helped countless Lewisham families transform their homes — and we're here to share what you really need to know.

How Much Does a Kitchen Extension Cost in Lewisham?

Costs vary depending on size and specification, but as a general guide:

• Single-storey rear extension (3–4m): £30,000–£55,000
• Side-return extension: £35,000–£60,000
• Large open-plan extension: £60,000+

Always budget a contingency of around 10–15% for unexpected surprises, particularly in older Lewisham terraces where hidden structural issues can arise.

Do You Need Planning Permission?

Many kitchen extensions in Lewisham fall under Permitted Development rights, meaning no formal planning application is needed. However, if your property is in a conservation area — and parts of Lewisham are — you'll need to check with the London Borough of Lewisham's planning department first. Our team can help you navigate this process smoothly.

What to Expect During the Build

A typical kitchen extension takes 8–14 weeks from groundworks to completion. Expect some disruption, but a well-organised contractor will minimise the impact on your daily life. Key stages include foundations, structural work, roofing, glazing, and fit-out.

Choosing the Right Builder

Always look for a local builder with proven experience in Lewisham and the wider SE London area. Check reviews, ask for references, and ensure they carry full liability insurance.

Ready to Get Started?

At Heath Projects Limited, shaping spaces, defining standards is more than a tagline — it's our promise to every Lewisham homeowner. Visit heathprojects.co.uk today to request your free consultation.