Realistic 2026 cost breakdowns for renovation and construction projects in London. No fluff, real numbers, what drives the price.
How much does a basement conversion cost in London? From ~£45k, most £70–130k, around £2,000–£5,000/m². Full 2026 breakdown: underpinning, waterproofing, party wall.
Read article →Glass extensions in London cost £100-180k+ for a 15-25 sqm build. Full guide: design, structural glass, costs, planning, when they're worth it.
Read article →How much value does a loft conversion really add in London? 2026 ROI data by borough, conversion type, and bedroom count. Plus what reduces ROI.
Read article →Comparing rear and side-return extensions on London terraces — which adds more space, costs less, and adds more value? 2026 ranges and decision framework.
Read article →Why two London extensions of the same size can cost £35k or £85k. The 11 cost drivers explained — plus realistic 2026 ranges by extension type.
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