Insights
Marketanalysis&guidance.
Data-driven articles by Builderr's senior team on London property values, planning policy, construction process and design decisions.
Featured · Market analysis
How much value does a loft conversion add to a London home in 2026?
Land Registry data analysis of 1,200 London terrace sales: what a dormer, L-shape and mansard loft conversion actually adds to property value across zones 2–6.
Planning
Permitted Development changes affecting London homes in 2026
What the 2025 GPDO amendments mean for London extensions and loft conversions in 2026 — practical implications for homeowners planning work now.
Sustainability
Heat pumps in London extensions: when they make sense and when they don't
Air source heat pumps are now standard spec on new builds and most extensions, but the economics depend on building fabric, hot water demand and noise constraints. Practical guidance from 30 installs.
Design
Side return versus rear extension: which works better for your London terrace?
Compare side return and rear extensions on cost per m², planning ease, light gain, kitchen workability and resale impact — with worked examples.
Process
How to choose a London builder: a 9-point assessment framework
Practical checklist for homeowners assessing London contractors: structure, references, insurance, contracts and the questions that separate professionals from cowboys.
Design
Kitchen extension glazing in 2026: bifolds, sliders, Crittall and rooflights compared
Detailed comparison of glazing options for London kitchen extensions: cost, thermal performance, aesthetics, longevity and the right choice for your project.
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