Welcome to LMDEC’s free 2026 construction costs estimator for London, designed specifically for those curious about the 2026 construction costs London might face! As South London specialists (Croydon, Wandsworth, Beckenham, and beyond), we know how fast prices change. Use this quick calculator for ballpark figures on extensions, lofts, kitchens, bathrooms, and more.
Important Disclaimer: These are mid-range estimates based on current 2026 London trends — actual costs vary by site, design, materials, and surprises. Always add 15–20% contingency. For a free, accurate quote tailored to your home, contact us today!
Here are some real-world South London renovation examples to inspire your 2026 project, taking into account the potential 2026 construction costs in London:
LMDEC 2026 South London Renovation Cost Estimator
Quick & accurate mid-range estimates for Croydon, Wandsworth, Beckenham & South London. ~30 seconds to results!
Estimates based on January 2026 London trends. Actual costs vary by site, design & surprises. LMDEC specializes in South London renovations — contact us for tailored advice!
Even if users don’t interact with the tool, provide a static overview that reflects the expected 2026 construction costs in London.
| Project Type | Average Cost Range (2026, London) | Cost per m² (mid-range) | Notes |
|---|---|---|---|
| Single-Storey Extension | £50,000 – £80,000+ | £2,500 – £4,000 | Great for open-plan kitchens/living |
| Double-Storey Extension | £80,000 – £150,000+ | £2,200 – £3,200 | Better value for extra bedrooms |
| Loft Conversion (Dormer) | £50,000 – £100,000+ | £1,800 – £3,000 | Adds bedroom + bathroom space |
Why Use Our Estimator?
- Tailored to South London realities (higher labour, tight sites, premium materials).
- Based on real 2026 trends — prices stabilising but labour still rising.
- We’re not just numbers — LMDEC delivers quality renovations, from electrical work to full refurbishments.
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Ready for a precise, no-obligation quote? Our team knows Croydon and South London inside out. Don’t wait to find out more about 2026 construction costs London will experience.