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Guides
Straight answers on what building work costs in London, what permission you need and what the regulations require, written by the team that builds it.
17 Oct 2026
How much does a house extension cost in London in 2026?
Realistic 2026 costs for single-storey, double-storey, side-return and wrap-around extensions in London, with what drives the price up or down and how to budget.
Read guide17 Oct 2026
Loft conversion costs in London: Velux, dormer, hip-to-gable and mansard
What each type of loft conversion costs in London in 2026, which suits your roof, and how long it takes.
Read guide17 Oct 2026
Do you need planning permission for an extension or loft conversion?
Permitted development rules for extensions and loft conversions in 2026, when you need full planning permission, and how long each route takes.
Read guide17 Oct 2026
Party wall agreements: what London homeowners need to know
When the Party Wall Act applies to extensions, lofts and basements, how notices work, what surveyors cost and how to avoid delays.
Read guide17 Oct 2026
Full house refurbishment cost per m² and timeline in London
What a full refurbishment costs per square metre in London in 2026, what is included, how long it takes and where the money goes.
Read guide17 Oct 2026
Building Regulations and Part L for extensions: what you must comply with
A plain-English guide to Building Regulations for extensions and lofts in 2026, including Part L insulation targets, structure, fire, drainage and the completion certificate.
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